Fix incorrect handling of boolean flags for builtin commands (#11492)

# Description
Possible fix of #11456
This PR fixes a bug where builtin commands did not respect the logic of
dynamically passed boolean flags. The reason is
[has_flag](6f59abaf43/crates/nu-protocol/src/ast/call.rs (L204C5-L212C6))
method did not evaluate and take into consideration expression used with
flag.

To address this issue a solution is proposed:
1. `has_flag` method is moved to `CallExt` and new logic to evaluate
expression and check if it is a boolean value is added
2. `has_flag_const` method is added to `CallExt` which is a constant
version of `has_flag`
3. `has_named` method is added to `Call` which is basically the old
logic of `has_flag`
4. All usages of `has_flag` in code are updated, mostly to pass
`engine_state` and `stack` to new `has_flag`. In `run_const` commands it
is replaced with `has_flag_const`. And in a few select places: parser,
`to nuon` and `into string` old logic via `has_named` is used.

# User-Facing Changes
Explicit values of boolean flags are now respected in builtin commands.
Before:

![image](https://github.com/nushell/nushell/assets/17511668/f9fbabb2-3cfd-43f9-ba9e-ece76d80043c)
After:

![image](https://github.com/nushell/nushell/assets/17511668/21867596-2075-437f-9c85-45563ac70083)

Another example:
Before:

![image](https://github.com/nushell/nushell/assets/17511668/efdbc5ca-5227-45a4-ac5b-532cdc2bbf5f)
After:

![image](https://github.com/nushell/nushell/assets/17511668/2907d5c5-aa93-404d-af1c-21cdc3d44646)


# Tests + Formatting
Added test reproducing some variants of original issue.

crates/nu-cli/src/commands/commandline.rs

@@ -71,7 +71,7 @@ impl Command for Commandline {
         if let Some(cmd) = call.opt::<Value>(engine_state, stack, 0)? {
             let mut repl = engine_state.repl_state.lock().expect("repl state mutex");
 
-            if call.has_flag("cursor") {
+            if call.has_flag(engine_state, stack, "cursor")? {
                 let cmd_str = cmd.as_string()?;
                 match cmd_str.parse::<i64>() {
                     Ok(n) => {
@@ -96,9 +96,9 @@ impl Command for Commandline {
                         })
                     }
                 }
-            } else if call.has_flag("append") {
+            } else if call.has_flag(engine_state, stack, "append")? {
                 repl.buffer.push_str(&cmd.as_string()?);
-            } else if call.has_flag("insert") {
+            } else if call.has_flag(engine_state, stack, "insert")? {
                 let cmd_str = cmd.as_string()?;
                 let cursor_pos = repl.cursor_pos;
                 repl.buffer.insert_str(cursor_pos, &cmd_str);
@@ -110,10 +110,10 @@ impl Command for Commandline {
             Ok(Value::nothing(call.head).into_pipeline_data())
         } else {
             let mut repl = engine_state.repl_state.lock().expect("repl state mutex");
-            if call.has_flag("cursor-end") {
+            if call.has_flag(engine_state, stack, "cursor-end")? {
                 repl.cursor_pos = repl.buffer.graphemes(true).count();
                 Ok(Value::nothing(call.head).into_pipeline_data())
-            } else if call.has_flag("cursor") {
+            } else if call.has_flag(engine_state, stack, "cursor")? {
                 let char_pos = repl
                     .buffer
                     .grapheme_indices(true)

crates/nu-cli/src/commands/history/history_.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -40,7 +41,7 @@ impl Command for History {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
@@ -48,8 +49,8 @@ impl Command for History {
 
         // todo for sqlite history this command should be an alias to `open ~/.config/nushell/history.sqlite3 | get history`
         if let Some(config_path) = nu_path::config_dir() {
-            let clear = call.has_flag("clear");
+            let clear = call.has_flag(engine_state, stack, "clear")?;
-            let long = call.has_flag("long");
+            let long = call.has_flag(engine_state, stack, "long")?;
             let ctrlc = engine_state.ctrlc.clone();
 
             let mut history_path = config_path;

crates/nu-cli/src/print.rs

@@ -54,8 +54,8 @@ Since this command has no output, there is no point in piping it with other comm
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let args: Vec<Value> = call.rest(engine_state, stack, 0)?;
-        let no_newline = call.has_flag("no-newline");
+        let no_newline = call.has_flag(engine_state, stack, "no-newline")?;
-        let to_stderr = call.has_flag("stderr");
+        let to_stderr = call.has_flag(engine_state, stack, "stderr")?;
 
         // This will allow for easy printing of pipelines as well
         if !args.is_empty() {

crates/nu-cmd-dataframe/src/dataframe/eager/append.rs

@@ -110,7 +110,7 @@ fn command(
 ) -> Result<PipelineData, ShellError> {
     let other: Value = call.req(engine_state, stack, 0)?;
 
-    let axis = if call.has_flag("col") {
+    let axis = if call.has_flag(engine_state, stack, "col")? {
         Axis::Column
     } else {
         Axis::Row

crates/nu-cmd-dataframe/src/dataframe/eager/drop_duplicates.rs

@@ -92,7 +92,7 @@ fn command(
 
     let subset_slice = subset.as_ref().map(|cols| &cols[..]);
 
-    let keep_strategy = if call.has_flag("last") {
+    let keep_strategy = if call.has_flag(engine_state, stack, "last")? {
         UniqueKeepStrategy::Last
     } else {
         UniqueKeepStrategy::First

crates/nu-cmd-dataframe/src/dataframe/eager/dummies.rs

@@ -1,4 +1,5 @@
 use super::super::values::NuDataFrame;
+use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -78,12 +79,12 @@ impl Command for Dummies {
 }
 
 fn command(
-    _engine_state: &EngineState,
+    engine_state: &EngineState,
-    _stack: &mut Stack,
+    stack: &mut Stack,
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
-    let drop_first: bool = call.has_flag("drop-first");
+    let drop_first: bool = call.has_flag(engine_state, stack, "drop-first")?;
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 
     df.as_ref()

crates/nu-cmd-dataframe/src/dataframe/eager/open.rs

@@ -139,7 +139,7 @@ fn from_parquet(
     stack: &mut Stack,
     call: &Call,
 ) -> Result<Value, ShellError> {
-    if call.has_flag("lazy") {
+    if call.has_flag(engine_state, stack, "lazy")? {
         let file: String = call.req(engine_state, stack, 0)?;
         let args = ScanArgsParquet {
             n_rows: None,
@@ -238,7 +238,7 @@ fn from_ipc(
     stack: &mut Stack,
     call: &Call,
 ) -> Result<Value, ShellError> {
-    if call.has_flag("lazy") {
+    if call.has_flag(engine_state, stack, "lazy")? {
         let file: String = call.req(engine_state, stack, 0)?;
         let args = ScanArgsIpc {
             n_rows: None,
@@ -363,12 +363,12 @@ fn from_csv(
     call: &Call,
 ) -> Result<Value, ShellError> {
     let delimiter: Option<Spanned<String>> = call.get_flag(engine_state, stack, "delimiter")?;
-    let no_header: bool = call.has_flag("no-header");
+    let no_header: bool = call.has_flag(engine_state, stack, "no-header")?;
     let infer_schema: Option<usize> = call.get_flag(engine_state, stack, "infer-schema")?;
     let skip_rows: Option<usize> = call.get_flag(engine_state, stack, "skip-rows")?;
     let columns: Option<Vec<String>> = call.get_flag(engine_state, stack, "columns")?;
 
-    if call.has_flag("lazy") {
+    if call.has_flag(engine_state, stack, "lazy")? {
         let file: String = call.req(engine_state, stack, 0)?;
         let csv_reader = LazyCsvReader::new(file);
 

crates/nu-cmd-dataframe/src/dataframe/eager/sample.rs

@@ -88,8 +88,8 @@ fn command(
     let seed: Option<u64> = call
         .get_flag::<i64>(engine_state, stack, "seed")?
         .map(|val| val as u64);
-    let replace: bool = call.has_flag("replace");
+    let replace: bool = call.has_flag(engine_state, stack, "replace")?;
-    let shuffle: bool = call.has_flag("shuffle");
+    let shuffle: bool = call.has_flag(engine_state, stack, "shuffle")?;
 
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 

crates/nu-cmd-dataframe/src/dataframe/eager/to_csv.rs

@@ -70,7 +70,7 @@ fn command(
 ) -> Result<PipelineData, ShellError> {
     let file_name: Spanned<PathBuf> = call.req(engine_state, stack, 0)?;
     let delimiter: Option<Spanned<String>> = call.get_flag(engine_state, stack, "delimiter")?;
-    let no_header: bool = call.has_flag("no-header");
+    let no_header: bool = call.has_flag(engine_state, stack, "no-header")?;
 
     let mut df = NuDataFrame::try_from_pipeline(input, call.head)?;
 

crates/nu-cmd-dataframe/src/dataframe/eager/to_nu.rs

@@ -100,7 +100,7 @@ fn dataframe_command(
     input: Value,
 ) -> Result<PipelineData, ShellError> {
     let rows: Option<usize> = call.get_flag(engine_state, stack, "rows")?;
-    let tail: bool = call.has_flag("tail");
+    let tail: bool = call.has_flag(engine_state, stack, "tail")?;
 
     let df = NuDataFrame::try_from_value(input)?;
 

crates/nu-cmd-dataframe/src/dataframe/lazy/join.rs

@@ -171,9 +171,9 @@ impl Command for LazyJoin {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let left = call.has_flag("left");
+        let left = call.has_flag(engine_state, stack, "left")?;
-        let outer = call.has_flag("outer");
+        let outer = call.has_flag(engine_state, stack, "outer")?;
-        let cross = call.has_flag("cross");
+        let cross = call.has_flag(engine_state, stack, "cross")?;
 
         let how = if left {
             JoinType::Left

crates/nu-cmd-dataframe/src/dataframe/lazy/sort_by_expr.rs

@@ -107,8 +107,8 @@ impl Command for LazySortBy {
         let vals: Vec<Value> = call.rest(engine_state, stack, 0)?;
         let value = Value::list(vals, call.head);
         let expressions = NuExpression::extract_exprs(value)?;
-        let nulls_last = call.has_flag("nulls-last");
+        let nulls_last = call.has_flag(engine_state, stack, "nulls-last")?;
-        let maintain_order = call.has_flag("maintain-order");
+        let maintain_order = call.has_flag(engine_state, stack, "maintain-order")?;
 
         let reverse: Option<Vec<bool>> = call.get_flag(engine_state, stack, "reverse")?;
         let reverse = match reverse {

crates/nu-cmd-dataframe/src/dataframe/series/cumulative.rs

@@ -103,7 +103,7 @@ fn command(
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
     let cum_type: Spanned<String> = call.req(engine_state, stack, 0)?;
-    let reverse = call.has_flag("reverse");
+    let reverse = call.has_flag(engine_state, stack, "reverse")?;
 
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
     let series = df.as_series(call.head)?;

crates/nu-cmd-dataframe/src/dataframe/series/date/as_date.rs

@@ -64,7 +64,7 @@ fn command(
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
     let format: String = call.req(engine_state, stack, 0)?;
-    let not_exact = call.has_flag("not-exact");
+    let not_exact = call.has_flag(engine_state, stack, "not-exact")?;
 
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
     let series = df.as_series(call.head)?;

crates/nu-cmd-dataframe/src/dataframe/series/date/as_datetime.rs

@@ -128,7 +128,7 @@ fn command(
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
     let format: String = call.req(engine_state, stack, 0)?;
-    let not_exact = call.has_flag("not-exact");
+    let not_exact = call.has_flag(engine_state, stack, "not-exact")?;
 
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
     let series = df.as_series(call.head)?;

crates/nu-cmd-dataframe/src/dataframe/series/indexes/arg_sort.rs

@@ -1,5 +1,6 @@
 use super::super::super::values::{Column, NuDataFrame};
 
+use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -92,18 +93,18 @@ impl Command for ArgSort {
 }
 
 fn command(
-    _engine_state: &EngineState,
+    engine_state: &EngineState,
-    _stack: &mut Stack,
+    stack: &mut Stack,
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 
     let sort_options = SortOptions {
-        descending: call.has_flag("reverse"),
+        descending: call.has_flag(engine_state, stack, "reverse")?,
-        nulls_last: call.has_flag("nulls-last"),
+        nulls_last: call.has_flag(engine_state, stack, "nulls-last")?,
         multithreaded: true,
-        maintain_order: call.has_flag("maintain-order"),
+        maintain_order: call.has_flag(engine_state, stack, "maintain-order")?,
     };
 
     let mut res = df

crates/nu-cmd-dataframe/src/dataframe/series/unique.rs

@@ -114,8 +114,8 @@ fn command_lazy(
     call: &Call,
     lazy: NuLazyFrame,
 ) -> Result<PipelineData, ShellError> {
-    let last = call.has_flag("last");
+    let last = call.has_flag(engine_state, stack, "last")?;
-    let maintain = call.has_flag("maintain-order");
+    let maintain = call.has_flag(engine_state, stack, "maintain-order")?;
 
     let subset: Option<Value> = call.get_flag(engine_state, stack, "subset")?;
     let subset = match subset {

crates/nu-cmd-extra/src/extra/bits/not.rs

@@ -54,7 +54,7 @@ impl Command for BitsNot {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let signed = call.has_flag("signed");
+        let signed = call.has_flag(engine_state, stack, "signed")?;
         let number_bytes: Option<Spanned<String>> =
             call.get_flag(engine_state, stack, "number-bytes")?;
         let bytes_len = get_number_bytes(number_bytes.as_ref());

crates/nu-cmd-extra/src/extra/bits/rotate_left.rs

@@ -57,7 +57,7 @@ impl Command for BitsRol {
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
-        let signed = call.has_flag("signed");
+        let signed = call.has_flag(engine_state, stack, "signed")?;
         let number_bytes: Option<Spanned<String>> =
             call.get_flag(engine_state, stack, "number-bytes")?;
         let bytes_len = get_number_bytes(number_bytes.as_ref());

crates/nu-cmd-extra/src/extra/bits/rotate_right.rs

@@ -57,7 +57,7 @@ impl Command for BitsRor {
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
-        let signed = call.has_flag("signed");
+        let signed = call.has_flag(engine_state, stack, "signed")?;
         let number_bytes: Option<Spanned<String>> =
             call.get_flag(engine_state, stack, "number-bytes")?;
         let bytes_len = get_number_bytes(number_bytes.as_ref());

crates/nu-cmd-extra/src/extra/bits/shift_left.rs

@@ -57,7 +57,7 @@ impl Command for BitsShl {
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
-        let signed = call.has_flag("signed");
+        let signed = call.has_flag(engine_state, stack, "signed")?;
         let number_bytes: Option<Spanned<String>> =
             call.get_flag(engine_state, stack, "number-bytes")?;
         let bytes_len = get_number_bytes(number_bytes.as_ref());

crates/nu-cmd-extra/src/extra/bits/shift_right.rs

@@ -57,7 +57,7 @@ impl Command for BitsShr {
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
-        let signed = call.has_flag("signed");
+        let signed = call.has_flag(engine_state, stack, "signed")?;
         let number_bytes: Option<Spanned<String>> =
             call.get_flag(engine_state, stack, "number-bytes")?;
         let bytes_len = get_number_bytes(number_bytes.as_ref());

crates/nu-cmd-extra/src/extra/filters/roll/roll_left.rs

@@ -100,7 +100,7 @@ impl Command for RollLeft {
         let by: Option<usize> = call.get_flag(engine_state, stack, "by")?;
         let metadata = input.metadata();
 
-        let cells_only = call.has_flag("cells-only");
+        let cells_only = call.has_flag(engine_state, stack, "cells-only")?;
         let value = input.into_value(call.head);
         let rotated_value =
             horizontal_rotate_value(value, by, cells_only, &HorizontalDirection::Left)?;

crates/nu-cmd-extra/src/extra/filters/roll/roll_right.rs

@@ -100,7 +100,7 @@ impl Command for RollRight {
         let by: Option<usize> = call.get_flag(engine_state, stack, "by")?;
         let metadata = input.metadata();
 
-        let cells_only = call.has_flag("cells-only");
+        let cells_only = call.has_flag(engine_state, stack, "cells-only")?;
         let value = input.into_value(call.head);
         let rotated_value =
             horizontal_rotate_value(value, by, cells_only, &HorizontalDirection::Right)?;

crates/nu-cmd-extra/src/extra/filters/rotate.rs

@@ -167,7 +167,7 @@ pub fn rotate(
     let mut new_values = vec![];
     let mut not_a_record = false;
     let mut total_rows = values.len();
-    let ccw: bool = call.has_flag("ccw");
+    let ccw: bool = call.has_flag(engine_state, stack, "ccw")?;
 
     if !ccw {
         values.reverse();

crates/nu-cmd-extra/src/extra/formats/to/html.rs

@@ -239,11 +239,11 @@ fn to_html(
     stack: &mut Stack,
 ) -> Result<PipelineData, ShellError> {
     let head = call.head;
-    let html_color = call.has_flag("html-color");
+    let html_color = call.has_flag(engine_state, stack, "html-color")?;
-    let no_color = call.has_flag("no-color");
+    let no_color = call.has_flag(engine_state, stack, "no-color")?;
-    let dark = call.has_flag("dark");
+    let dark = call.has_flag(engine_state, stack, "dark")?;
-    let partial = call.has_flag("partial");
+    let partial = call.has_flag(engine_state, stack, "partial")?;
-    let list = call.has_flag("list");
+    let list = call.has_flag(engine_state, stack, "list")?;
     let theme: Option<Spanned<String>> = call.get_flag(engine_state, stack, "theme")?;
     let config = engine_state.get_config();
 

crates/nu-cmd-extra/src/extra/math/arccos.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -35,12 +36,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-extra/src/extra/math/arcsin.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -35,12 +36,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-extra/src/extra/math/arctan.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -35,12 +36,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-extra/src/extra/math/cos.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -34,12 +35,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-extra/src/extra/math/sin.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -34,12 +35,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-extra/src/extra/math/tan.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -34,12 +35,12 @@ impl Command for SubCommand {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let use_degrees = call.has_flag("degrees");
+        let use_degrees = call.has_flag(engine_state, stack, "degrees")?;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {
             return Err(ShellError::PipelineEmpty { dst_span: head });

crates/nu-cmd-lang/src/core_commands/collect.rs

@@ -67,7 +67,7 @@ impl Command for Collect {
         )
         .map(|x| x.set_metadata(metadata));
 
-        if call.has_flag("keep-env") {
+        if call.has_flag(engine_state, stack, "keep-env")? {
             redirect_env(engine_state, stack, &stack_captures);
             // for when we support `data | let x = $in;`
             // remove the variables added earlier

crates/nu-cmd-lang/src/core_commands/describe.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Closure, Command, EngineState, Stack, StateWorkingSet},
@@ -44,20 +45,30 @@ impl Command for Describe {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        run(Some(engine_state), call, input)
+        let options = Options {
+            no_collect: call.has_flag(engine_state, stack, "no-collect")?,
+            detailed: call.has_flag(engine_state, stack, "detailed")?,
+            collect_lazyrecords: call.has_flag(engine_state, stack, "collect-lazyrecords")?,
+        };
+        run(Some(engine_state), call, input, options)
     }
 
     fn run_const(
         &self,
-        _working_set: &StateWorkingSet,
+        working_set: &StateWorkingSet,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        run(None, call, input)
+        let options = Options {
+            no_collect: call.has_flag_const(working_set, "no-collect")?,
+            detailed: call.has_flag_const(working_set, "detailed")?,
+            collect_lazyrecords: call.has_flag_const(working_set, "collect-lazyrecords")?,
+        };
+        run(None, call, input, options)
     }
 
     fn examples(&self) -> Vec<Example> {
@@ -148,15 +159,21 @@ impl Command for Describe {
     }
 }
 
+#[derive(Clone, Copy)]
+struct Options {
+    no_collect: bool,
+    detailed: bool,
+    collect_lazyrecords: bool,
+}
+
 fn run(
     engine_state: Option<&EngineState>,
     call: &Call,
     input: PipelineData,
+    options: Options,
 ) -> Result<PipelineData, ShellError> {
     let metadata = input.metadata().clone().map(Box::new);
     let head = call.head;
-    let no_collect: bool = call.has_flag("no-collect");
-    let detailed = call.has_flag("detailed");
 
     let description: Value = match input {
         PipelineData::ExternalStream {
@@ -165,7 +182,7 @@ fn run(
             ref exit_code,
             ..
         } => {
-            if detailed {
+            if options.detailed {
                 Value::record(
                     record!(
                         "type" => Value::string("stream", head),
@@ -212,23 +229,23 @@ fn run(
             }
         }
         PipelineData::ListStream(_, _) => {
-            if detailed {
+            if options.detailed {
                 Value::record(
                     record!(
                         "type" => Value::string("stream", head),
                         "origin" => Value::string("nushell", head),
                         "subtype" => {
-                           if no_collect {
+                           if options.no_collect {
                             Value::string("any", head)
                            } else {
-                            describe_value(input.into_value(head), head, engine_state, call)?
+                            describe_value(input.into_value(head), head, engine_state, call, options)?
                            }
                         },
                         "metadata" => metadata_to_value(metadata, head),
                     ),
                     head,
                 )
-            } else if no_collect {
+            } else if options.no_collect {
                 Value::string("stream", head)
             } else {
                 let value = input.into_value(head);
@@ -242,13 +259,13 @@ fn run(
         }
         _ => {
             let value = input.into_value(head);
-            if !detailed {
+            if !options.detailed {
                 match value {
                     Value::CustomValue { val, .. } => Value::string(val.value_string(), head),
                     _ => Value::string(value.get_type().to_string(), head),
                 }
             } else {
-                describe_value(value, head, engine_state, call)?
+                describe_value(value, head, engine_state, call, options)?
             }
         }
     };
@@ -273,12 +290,13 @@ fn describe_value(
     head: nu_protocol::Span,
     engine_state: Option<&EngineState>,
     call: &Call,
+    options: Options,
 ) -> Result<Value, ShellError> {
     Ok(match value {
         Value::CustomValue { val, internal_span } => Value::record(
             record!(
                 "type" => Value::string("custom", head),
-                "subtype" => run(engine_state,call, val.to_base_value(internal_span)?.into_pipeline_data())?.into_value(head),
+                "subtype" => run(engine_state,call, val.to_base_value(internal_span)?.into_pipeline_data(), options)?.into_value(head),
             ),
             head,
         ),
@@ -303,6 +321,7 @@ fn describe_value(
                     head,
                     engine_state,
                     call,
+                    options,
                 )?);
             }
 
@@ -321,7 +340,7 @@ fn describe_value(
                 "length" => Value::int(vals.len() as i64, head),
                 "values" => Value::list(vals.into_iter().map(|v|
                     Ok(compact_primitive_description(
-                        describe_value(v, head, engine_state, call)?
+                        describe_value(v, head, engine_state, call, options)?
                     ))
                 )
                 .collect::<Result<Vec<Value>, ShellError>>()?, head),
@@ -381,16 +400,15 @@ fn describe_value(
             head,
         ),
         Value::LazyRecord { val, .. } => {
-            let collect_lazyrecords: bool = call.has_flag("collect-lazyrecords");
             let mut record = Record::new();
 
             record.push("type", Value::string("record", head));
             record.push("lazy", Value::bool(true, head));
 
-            if collect_lazyrecords {
+            if options.collect_lazyrecords {
                 let collected = val.collect()?;
                 if let Value::Record { mut val, .. } =
-                    describe_value(collected, head, engine_state, call)?
+                    describe_value(collected, head, engine_state, call, options)?
                 {
                     record.push("length", Value::int(val.len() as i64, head));
                     for (_k, v) in val.iter_mut() {
@@ -399,6 +417,7 @@ fn describe_value(
                             head,
                             engine_state,
                             call,
+                            options,
                         )?);
                     }
 

crates/nu-cmd-lang/src/core_commands/do_.rs

@@ -70,11 +70,13 @@ impl Command for Do {
     ) -> Result<PipelineData, ShellError> {
         let block: Closure = call.req(engine_state, caller_stack, 0)?;
         let rest: Vec<Value> = call.rest(engine_state, caller_stack, 1)?;
-        let ignore_all_errors = call.has_flag("ignore-errors");
+        let ignore_all_errors = call.has_flag(engine_state, caller_stack, "ignore-errors")?;
-        let ignore_shell_errors = ignore_all_errors || call.has_flag("ignore-shell-errors");
+        let ignore_shell_errors = ignore_all_errors
-        let ignore_program_errors = ignore_all_errors || call.has_flag("ignore-program-errors");
+            || call.has_flag(engine_state, caller_stack, "ignore-shell-errors")?;
-        let capture_errors = call.has_flag("capture-errors");
+        let ignore_program_errors = ignore_all_errors
-        let has_env = call.has_flag("env");
+            || call.has_flag(engine_state, caller_stack, "ignore-program-errors")?;
+        let capture_errors = call.has_flag(engine_state, caller_stack, "capture-errors")?;
+        let has_env = call.has_flag(engine_state, caller_stack, "env")?;
 
         let mut callee_stack = caller_stack.captures_to_stack(block.captures);
         let block = engine_state.get_block(block.block_id);

crates/nu-cmd-lang/src/core_commands/error_make.rs

@@ -46,7 +46,7 @@ impl Command for ErrorMake {
     ) -> Result<PipelineData, ShellError> {
         let arg: Value = call.req(engine_state, stack, 0)?;
 
-        let throw_span = if call.has_flag("unspanned") {
+        let throw_span = if call.has_flag(engine_state, stack, "unspanned")? {
             None
         } else {
             Some(call.head)

crates/nu-cmd-lang/src/core_commands/for_.rs

@@ -74,7 +74,7 @@ impl Command for For {
 
         let block: Block = call.req(engine_state, stack, 2)?;
 
-        let numbered = call.has_flag("numbered");
+        let numbered = call.has_flag(engine_state, stack, "numbered")?;
 
         let ctrlc = engine_state.ctrlc.clone();
         let engine_state = engine_state.clone();

crates/nu-cmd-lang/src/core_commands/hide_env.rs

@@ -42,7 +42,7 @@ impl Command for HideEnv {
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let env_var_names: Vec<Spanned<String>> = call.rest(engine_state, stack, 0)?;
-        let ignore_errors = call.has_flag("ignore-errors");
+        let ignore_errors = call.has_flag(engine_state, stack, "ignore-errors")?;
 
         for name in env_var_names {
             if !stack.remove_env_var(engine_state, &name.item) && !ignore_errors {

crates/nu-command/src/bytes/add.rs

@@ -75,7 +75,7 @@ impl Command for BytesAdd {
         let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 1)?;
         let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
         let index: Option<usize> = call.get_flag(engine_state, stack, "index")?;
-        let end = call.has_flag("end");
+        let end = call.has_flag(engine_state, stack, "end")?;
 
         let arg = Arguments {
             added_data,

crates/nu-command/src/bytes/build_.rs

@@ -1,4 +1,4 @@
-use nu_engine::{eval_expression, CallExt};
+use nu_engine::eval_expression;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{

crates/nu-command/src/bytes/index_of.rs

@@ -73,8 +73,8 @@ impl Command for BytesIndexOf {
         let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
         let arg = Arguments {
             pattern,
-            end: call.has_flag("end"),
+            end: call.has_flag(engine_state, stack, "end")?,
-            all: call.has_flag("all"),
+            all: call.has_flag(engine_state, stack, "all")?,
             cell_paths,
         };
         operate(index_of, arg, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/bytes/remove.rs

@@ -74,9 +74,9 @@ impl Command for BytesRemove {
         let pattern_to_remove: Vec<u8> = pattern_to_remove.item;
         let arg = Arguments {
             pattern: pattern_to_remove,
-            end: call.has_flag("end"),
+            end: call.has_flag(engine_state, stack, "end")?,
             cell_paths,
-            all: call.has_flag("all"),
+            all: call.has_flag(engine_state, stack, "all")?,
         };
 
         operate(remove, arg, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/bytes/replace.rs

@@ -76,7 +76,7 @@ impl Command for BytesReplace {
             find: find.item,
             replace: call.req::<Vec<u8>>(engine_state, stack, 1)?,
             cell_paths,
-            all: call.has_flag("all"),
+            all: call.has_flag(engine_state, stack, "all")?,
         };
 
         operate(replace, arg, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/conversions/into/binary.rs

@@ -148,7 +148,7 @@ fn into_binary(
         _ => {
             let args = Arguments {
                 cell_paths,
-                compact: call.has_flag("compact"),
+                compact: call.has_flag(engine_state, stack, "compact")?,
             };
             operate(action, args, input, call.head, engine_state.ctrlc.clone())
         }

crates/nu-command/src/conversions/into/datetime.rs

@@ -116,9 +116,9 @@ impl Command for SubCommand {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        if call.has_flag("list") {
+        if call.has_flag(engine_state, stack, "list")? {
             Ok(generate_strftime_list(call.head, true).into_pipeline_data())
-        } else if call.has_flag("list-human") {
+        } else if call.has_flag(engine_state, stack, "list-human")? {
             Ok(list_human_readable_examples(call.head).into_pipeline_data())
         } else {
             let cell_paths = call.rest(engine_state, stack, 0)?;

crates/nu-command/src/conversions/into/string.rs

@@ -11,7 +11,6 @@ use num_format::ToFormattedString;
 
 struct Arguments {
     decimals_value: Option<i64>,
-    decimals: bool,
     cell_paths: Option<Vec<CellPath>>,
     config: Config,
 }
@@ -148,11 +147,10 @@ fn string_helper(
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
-    let decimals = call.has_flag("decimals");
     let head = call.head;
     let decimals_value: Option<i64> = call.get_flag(engine_state, stack, "decimals")?;
     if let Some(decimal_val) = decimals_value {
-        if decimals && decimal_val.is_negative() {
+        if decimal_val.is_negative() {
             return Err(ShellError::TypeMismatch {
                 err_message: "Cannot accept negative integers for decimals arguments".to_string(),
                 span: head,
@@ -164,7 +162,6 @@ fn string_helper(
     let config = engine_state.get_config().clone();
     let args = Arguments {
         decimals_value,
-        decimals,
         cell_paths,
         config,
     };
@@ -186,7 +183,6 @@ fn string_helper(
 }
 
 fn action(input: &Value, args: &Arguments, span: Span) -> Value {
-    let decimals = args.decimals;
     let digits = args.decimals_value;
     let config = &args.config;
     match input {
@@ -196,8 +192,8 @@ fn action(input: &Value, args: &Arguments, span: Span) -> Value {
             Value::string(res, span)
         }
         Value::Float { val, .. } => {
-            if decimals {
+            if let Some(decimal_value) = digits {
-                let decimal_value = digits.unwrap_or(2) as usize;
+                let decimal_value = decimal_value as usize;
                 Value::string(format!("{val:.decimal_value$}"), span)
             } else {
                 Value::string(val.to_string(), span)

crates/nu-command/src/debug/ast.rs

@@ -41,8 +41,8 @@ impl Command for Ast {
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let pipeline: Spanned<String> = call.req(engine_state, stack, 0)?;
-        let to_json = call.has_flag("json");
+        let to_json = call.has_flag(engine_state, stack, "json")?;
-        let minify = call.has_flag("minify");
+        let minify = call.has_flag(engine_state, stack, "minify")?;
         let mut working_set = StateWorkingSet::new(engine_state);
         let block_output = parse(&mut working_set, None, pipeline.item.as_bytes(), false);
         let error_output = working_set.parse_errors.first();

crates/nu-command/src/debug/debug_.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -31,13 +32,13 @@ impl Command for Debug {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let config = engine_state.get_config().clone();
-        let raw = call.has_flag("raw");
+        let raw = call.has_flag(engine_state, stack, "raw")?;
 
         // Should PipelineData::Empty result in an error here?
 

crates/nu-command/src/env/config/config_env.rs

@@ -1,4 +1,4 @@
-use nu_engine::env_to_strings;
+use nu_engine::{env_to_strings, CallExt};
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -59,7 +59,7 @@ impl Command for ConfigEnv {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         // `--default` flag handling
-        if call.has_flag("default") {
+        if call.has_flag(engine_state, stack, "default")? {
             let head = call.head;
             return Ok(Value::string(nu_utils::get_default_env(), head).into_pipeline_data());
         }

crates/nu-command/src/env/config/config_nu.rs

@@ -1,4 +1,4 @@
-use nu_engine::env_to_strings;
+use nu_engine::{env_to_strings, CallExt};
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -63,7 +63,7 @@ impl Command for ConfigNu {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         // `--default` flag handling
-        if call.has_flag("default") {
+        if call.has_flag(engine_state, stack, "default")? {
             let head = call.head;
             return Ok(Value::string(nu_utils::get_default_config(), head).into_pipeline_data());
         }

crates/nu-command/src/env/config/config_reset.rs

@@ -1,4 +1,5 @@
 use chrono::Local;
+use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -39,14 +40,14 @@ impl Command for ConfigReset {
 
     fn run(
         &self,
-        _engine_state: &EngineState,
+        engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let only_nu = call.has_flag("nu");
+        let only_nu = call.has_flag(engine_state, stack, "nu")?;
-        let only_env = call.has_flag("env");
+        let only_env = call.has_flag(engine_state, stack, "env")?;
-        let no_backup = call.has_flag("without-backup");
+        let no_backup = call.has_flag(engine_state, stack, "without-backup")?;
         let span = call.head;
         let mut config_path = match nu_path::config_dir() {
             Some(path) => path,

crates/nu-command/src/filesystem/cp.rs

@@ -76,11 +76,11 @@ impl Command for Cp {
     ) -> Result<PipelineData, ShellError> {
         let src: Spanned<String> = call.req(engine_state, stack, 0)?;
         let dst: Spanned<String> = call.req(engine_state, stack, 1)?;
-        let recursive = call.has_flag("recursive");
+        let recursive = call.has_flag(engine_state, stack, "recursive")?;
-        let verbose = call.has_flag("verbose");
+        let verbose = call.has_flag(engine_state, stack, "verbose")?;
-        let interactive = call.has_flag("interactive");
+        let interactive = call.has_flag(engine_state, stack, "interactive")?;
-        let progress = call.has_flag("progress");
+        let progress = call.has_flag(engine_state, stack, "progress")?;
-        let update_mode = call.has_flag("update");
+        let update_mode = call.has_flag(engine_state, stack, "update")?;
 
         let current_dir_path = current_dir(engine_state, stack)?;
         let destination = current_dir_path.join(dst.item.as_str());
@@ -229,7 +229,7 @@ impl Command for Cp {
                     inner: vec![],
                 })?;
 
-                let not_follow_symlink = call.has_flag("no-symlink");
+                let not_follow_symlink = call.has_flag(engine_state, stack, "no-symlink")?;
                 let sources = sources.paths_applying_with(|(source_file, depth_level)| {
                     let mut dest = destination.clone();
 

crates/nu-command/src/filesystem/glob.rs

@@ -137,9 +137,9 @@ impl Command for Glob {
         let span = call.head;
         let glob_pattern: Spanned<String> = call.req(engine_state, stack, 0)?;
         let depth = call.get_flag(engine_state, stack, "depth")?;
-        let no_dirs = call.has_flag("no-dir");
+        let no_dirs = call.has_flag(engine_state, stack, "no-dir")?;
-        let no_files = call.has_flag("no-file");
+        let no_files = call.has_flag(engine_state, stack, "no-file")?;
-        let no_symlinks = call.has_flag("no-symlink");
+        let no_symlinks = call.has_flag(engine_state, stack, "no-symlink")?;
 
         let paths_to_exclude: Option<Value> = call.get_flag(engine_state, stack, "exclude")?;
 

crates/nu-command/src/filesystem/ls.rs

@@ -73,13 +73,13 @@ impl Command for Ls {
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let all = call.has_flag("all");
+        let all = call.has_flag(engine_state, stack, "all")?;
-        let long = call.has_flag("long");
+        let long = call.has_flag(engine_state, stack, "long")?;
-        let short_names = call.has_flag("short-names");
+        let short_names = call.has_flag(engine_state, stack, "short-names")?;
-        let full_paths = call.has_flag("full-paths");
+        let full_paths = call.has_flag(engine_state, stack, "full-paths")?;
-        let du = call.has_flag("du");
+        let du = call.has_flag(engine_state, stack, "du")?;
-        let directory = call.has_flag("directory");
+        let directory = call.has_flag(engine_state, stack, "directory")?;
-        let use_mime_type = call.has_flag("mime-type");
+        let use_mime_type = call.has_flag(engine_state, stack, "mime-type")?;
         let ctrl_c = engine_state.ctrlc.clone();
         let call_span = call.head;
         let cwd = current_dir(engine_state, stack)?;

crates/nu-command/src/filesystem/mkdir.rs

@@ -51,7 +51,7 @@ impl Command for Mkdir {
             .map(|dir| path.join(dir))
             .peekable();
 
-        let is_verbose = call.has_flag("verbose");
+        let is_verbose = call.has_flag(engine_state, stack, "verbose")?;
         let mut stream: VecDeque<Value> = VecDeque::new();
 
         if directories.peek().is_none() {

crates/nu-command/src/filesystem/mktemp.rs

@@ -84,9 +84,9 @@ impl Command for Mktemp {
             .cloned()
             .map(|i: Spanned<String>| i.item)
             .unwrap_or("tmp.XXXXXXXXXX".to_string()); // same as default in coreutils
-        let directory = call.has_flag("directory");
+        let directory = call.has_flag(engine_state, stack, "directory")?;
         let suffix = call.get_flag(engine_state, stack, "suffix")?;
-        let tmpdir = call.has_flag("tmpdir");
+        let tmpdir = call.has_flag(engine_state, stack, "tmpdir")?;
         let tmpdir_path = call
             .get_flag(engine_state, stack, "tmpdir-path")?
             .map(|i: Spanned<PathBuf>| i.item);

crates/nu-command/src/filesystem/mv.rs

@@ -65,10 +65,10 @@ impl Command for Mv {
         // TODO: handle invalid directory or insufficient permissions when moving
         let spanned_source: Spanned<String> = call.req(engine_state, stack, 0)?;
         let spanned_destination: Spanned<String> = call.req(engine_state, stack, 1)?;
-        let verbose = call.has_flag("verbose");
+        let verbose = call.has_flag(engine_state, stack, "verbose")?;
-        let interactive = call.has_flag("interactive");
+        let interactive = call.has_flag(engine_state, stack, "interactive")?;
-        let force = call.has_flag("force");
+        let force = call.has_flag(engine_state, stack, "force")?;
-        let update_mode = call.has_flag("update");
+        let update_mode = call.has_flag(engine_state, stack, "update")?;
 
         let ctrlc = engine_state.ctrlc.clone();
 

crates/nu-command/src/filesystem/open.rs

@@ -59,7 +59,7 @@ impl Command for Open {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let raw = call.has_flag("raw");
+        let raw = call.has_flag(engine_state, stack, "raw")?;
         let call_span = call.head;
         let ctrlc = engine_state.ctrlc.clone();
         let cwd = current_dir(engine_state, stack)?;

crates/nu-command/src/filesystem/rm.rs

@@ -124,13 +124,13 @@ fn rm(
     stack: &mut Stack,
     call: &Call,
 ) -> Result<PipelineData, ShellError> {
-    let trash = call.has_flag("trash");
+    let trash = call.has_flag(engine_state, stack, "trash")?;
-    let permanent = call.has_flag("permanent");
+    let permanent = call.has_flag(engine_state, stack, "permanent")?;
-    let recursive = call.has_flag("recursive");
+    let recursive = call.has_flag(engine_state, stack, "recursive")?;
-    let force = call.has_flag("force");
+    let force = call.has_flag(engine_state, stack, "force")?;
-    let verbose = call.has_flag("verbose");
+    let verbose = call.has_flag(engine_state, stack, "verbose")?;
-    let interactive = call.has_flag("interactive");
+    let interactive = call.has_flag(engine_state, stack, "interactive")?;
-    let interactive_once = call.has_flag("interactive-once") && !interactive;
+    let interactive_once = call.has_flag(engine_state, stack, "interactive-once")? && !interactive;
 
     let ctrlc = engine_state.ctrlc.clone();
 

crates/nu-command/src/filesystem/save.rs

@@ -63,10 +63,10 @@ impl Command for Save {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let raw = call.has_flag("raw");
+        let raw = call.has_flag(engine_state, stack, "raw")?;
-        let append = call.has_flag("append");
+        let append = call.has_flag(engine_state, stack, "append")?;
-        let force = call.has_flag("force");
+        let force = call.has_flag(engine_state, stack, "force")?;
-        let progress = call.has_flag("progress");
+        let progress = call.has_flag(engine_state, stack, "progress")?;
         let out_append = if let Some(Expression {
             expr: Expr::Bool(out_append),
             ..

crates/nu-command/src/filesystem/touch.rs

@@ -67,10 +67,10 @@ impl Command for Touch {
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let mut change_mtime: bool = call.has_flag("modified");
+        let mut change_mtime: bool = call.has_flag(engine_state, stack, "modified")?;
-        let mut change_atime: bool = call.has_flag("access");
+        let mut change_atime: bool = call.has_flag(engine_state, stack, "access")?;
-        let use_reference: bool = call.has_flag("reference");
+        let use_reference: bool = call.has_flag(engine_state, stack, "reference")?;
-        let no_create: bool = call.has_flag("no-create");
+        let no_create: bool = call.has_flag(engine_state, stack, "no-create")?;
         let target: String = call.req(engine_state, stack, 0)?;
         let rest: Vec<String> = call.rest(engine_state, stack, 1)?;
 

crates/nu-command/src/filesystem/ucp.rs

@@ -96,19 +96,19 @@ impl Command for UCp {
         call: &Call,
         _input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let interactive = call.has_flag("interactive");
+        let interactive = call.has_flag(engine_state, stack, "interactive")?;
-        let (update, copy_mode) = if call.has_flag("update") {
+        let (update, copy_mode) = if call.has_flag(engine_state, stack, "update")? {
             (UpdateMode::ReplaceIfOlder, CopyMode::Update)
         } else {
             (UpdateMode::ReplaceAll, CopyMode::Copy)
         };
-        let force = call.has_flag("force");
+        let force = call.has_flag(engine_state, stack, "force")?;
-        let no_clobber = call.has_flag("no-clobber");
+        let no_clobber = call.has_flag(engine_state, stack, "no-clobber")?;
-        let progress = call.has_flag("progress");
+        let progress = call.has_flag(engine_state, stack, "progress")?;
-        let recursive = call.has_flag("recursive");
+        let recursive = call.has_flag(engine_state, stack, "recursive")?;
-        let verbose = call.has_flag("verbose");
+        let verbose = call.has_flag(engine_state, stack, "verbose")?;
 
-        let debug = call.has_flag("debug");
+        let debug = call.has_flag(engine_state, stack, "debug")?;
         let overwrite = if no_clobber {
             uu_cp::OverwriteMode::NoClobber
         } else if interactive {

crates/nu-command/src/filesystem/umkdir.rs

@@ -57,7 +57,7 @@ impl Command for UMkdir {
             .map(|dir| nu_path::expand_path_with(dir, &cwd))
             .peekable();
 
-        let is_verbose = call.has_flag("verbose");
+        let is_verbose = call.has_flag(engine_state, stack, "verbose")?;
 
         if directories.peek().is_none() {
             return Err(ShellError::MissingParameter {

crates/nu-command/src/filesystem/watch.rs

@@ -96,7 +96,7 @@ impl Command for Watch {
             .get_block(capture_block.block_id)
             .clone();
 
-        let verbose = call.has_flag("verbose");
+        let verbose = call.has_flag(engine_state, stack, "verbose")?;
 
         let debounce_duration_flag: Option<Spanned<i64>> =
             call.get_flag(engine_state, stack, "debounce-ms")?;

crates/nu-command/src/filters/compact.rs

@@ -51,7 +51,7 @@ impl Command for Compact {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let empty = call.has_flag("empty");
+        let empty = call.has_flag(engine_state, stack, "empty")?;
         compact(engine_state, stack, call, input, empty)
     }
 

crates/nu-command/src/filters/each.rs

@@ -114,7 +114,7 @@ with 'transpose' first."#
     ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
 
-        let keep_empty = call.has_flag("keep-empty");
+        let keep_empty = call.has_flag(engine_state, stack, "keep-empty")?;
 
         let metadata = input.metadata();
         let ctrlc = engine_state.ctrlc.clone();

crates/nu-command/src/filters/every.rs

@@ -71,7 +71,7 @@ impl Command for Every {
             stride => stride,
         };
 
-        let skip = call.has_flag("skip");
+        let skip = call.has_flag(engine_state, stack, "skip")?;
 
         let metadata = input.metadata();
 

crates/nu-command/src/filters/find.rs

@@ -219,7 +219,7 @@ impl Command for Find {
 fn find_with_regex(
     regex: String,
     engine_state: &EngineState,
-    _stack: &mut Stack,
+    stack: &mut Stack,
     call: &Call,
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
@@ -227,10 +227,10 @@ fn find_with_regex(
     let ctrlc = engine_state.ctrlc.clone();
     let config = engine_state.get_config().clone();
 
-    let insensitive = call.has_flag("ignore-case");
+    let insensitive = call.has_flag(engine_state, stack, "ignore-case")?;
-    let multiline = call.has_flag("multiline");
+    let multiline = call.has_flag(engine_state, stack, "multiline")?;
-    let dotall = call.has_flag("dotall");
+    let dotall = call.has_flag(engine_state, stack, "dotall")?;
-    let invert = call.has_flag("invert");
+    let invert = call.has_flag(engine_state, stack, "invert")?;
 
     let flags = match (insensitive, multiline, dotall) {
         (false, false, false) => "",
@@ -336,7 +336,7 @@ fn find_with_rest_and_highlight(
     let engine_state = engine_state.clone();
     let config = engine_state.get_config().clone();
     let filter_config = engine_state.get_config().clone();
-    let invert = call.has_flag("invert");
+    let invert = call.has_flag(&engine_state, stack, "invert")?;
     let terms = call.rest::<Value>(&engine_state, stack, 0)?;
     let lower_terms = terms
         .iter()

crates/nu-command/src/filters/flatten.rs

@@ -128,7 +128,7 @@ fn flatten(
 ) -> Result<PipelineData, ShellError> {
     let columns: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
     let metadata = input.metadata();
-    let flatten_all = call.has_flag("all");
+    let flatten_all = call.has_flag(engine_state, stack, "all")?;
 
     input
         .flat_map(

crates/nu-command/src/filters/get.rs

@@ -66,8 +66,8 @@ If multiple cell paths are given, this will produce a list of values."#
         let span = call.head;
         let mut cell_path: CellPath = call.req(engine_state, stack, 0)?;
         let mut rest: Vec<CellPath> = call.rest(engine_state, stack, 1)?;
-        let ignore_errors = call.has_flag("ignore-errors");
+        let ignore_errors = call.has_flag(engine_state, stack, "ignore-errors")?;
-        let sensitive = call.has_flag("sensitive");
+        let sensitive = call.has_flag(engine_state, stack, "sensitive")?;
         let ctrlc = engine_state.ctrlc.clone();
         let metadata = input.metadata();
 

crates/nu-command/src/filters/group_by.rs

@@ -188,7 +188,7 @@ pub fn group_by(
         None => group_no_grouper(values)?,
     };
 
-    let value = if call.has_flag("to-table") {
+    let value = if call.has_flag(engine_state, stack, "to-table")? {
         groups_to_table(groups, span)
     } else {
         groups_to_record(groups, span)

crates/nu-command/src/filters/join.rs

@@ -75,7 +75,7 @@ impl Command for Join {
             .opt(engine_state, stack, 2)?
             .unwrap_or_else(|| l_on.clone());
         let span = call.head;
-        let join_type = join_type(call)?;
+        let join_type = join_type(engine_state, stack, call)?;
 
         // FIXME: we should handle ListStreams properly instead of collecting
         let collected_input = input.into_value(span);
@@ -116,12 +116,16 @@ impl Command for Join {
     }
 }
 
-fn join_type(call: &Call) -> Result<JoinType, nu_protocol::ShellError> {
+fn join_type(
+    engine_state: &EngineState,
+    stack: &mut Stack,
+    call: &Call,
+) -> Result<JoinType, nu_protocol::ShellError> {
     match (
-        call.has_flag("inner"),
+        call.has_flag(engine_state, stack, "inner")?,
-        call.has_flag("left"),
+        call.has_flag(engine_state, stack, "left")?,
-        call.has_flag("right"),
+        call.has_flag(engine_state, stack, "right")?,
-        call.has_flag("outer"),
+        call.has_flag(engine_state, stack, "outer")?,
     ) {
         (_, false, false, false) => Ok(JoinType::Inner),
         (false, true, false, false) => Ok(JoinType::Left),

crates/nu-command/src/filters/lines.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -30,13 +31,13 @@ impl Command for Lines {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let ctrlc = engine_state.ctrlc.clone();
-        let skip_empty = call.has_flag("skip-empty");
+        let skip_empty = call.has_flag(engine_state, stack, "skip-empty")?;
 
         // match \r\n or \n
         static LINE_BREAK_REGEX: Lazy<Regex> =

crates/nu-command/src/filters/par_each.rs

@@ -121,7 +121,7 @@ impl Command for ParEach {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
         let threads: Option<usize> = call.get_flag(engine_state, stack, "threads")?;
         let max_threads = threads.unwrap_or(0);
-        let keep_order = call.has_flag("keep-order");
+        let keep_order = call.has_flag(engine_state, stack, "keep-order")?;
         let metadata = input.metadata();
         let ctrlc = engine_state.ctrlc.clone();
         let outer_ctrlc = engine_state.ctrlc.clone();

crates/nu-command/src/filters/reject.rs

@@ -133,7 +133,7 @@ impl Command for Reject {
         }
         let span = call.head;
 
-        let ignore_errors = call.has_flag("ignore-errors");
+        let ignore_errors = call.has_flag(engine_state, stack, "ignore-errors")?;
         if ignore_errors {
             for cell_path in &mut new_columns {
                 cell_path.make_optional();

crates/nu-command/src/filters/select.rs

@@ -137,7 +137,7 @@ produce a table, a list will produce a list, and a record will produce a record.
                 }
             }
         }
-        let ignore_errors = call.has_flag("ignore-errors");
+        let ignore_errors = call.has_flag(engine_state, stack, "ignore-errors")?;
         let span = call.head;
 
         if ignore_errors {
@@ -235,7 +235,7 @@ fn select(
     let columns = new_columns;
 
     let input = if !unique_rows.is_empty() {
-        // let skip = call.has_flag("skip");
+        // let skip = call.has_flag(engine_state, stack, "skip")?;
         let metadata = input.metadata();
         let pipeline_iter: PipelineIterator = input.into_iter();
 

crates/nu-command/src/filters/sort.rs

@@ -1,4 +1,5 @@
 use alphanumeric_sort::compare_str;
+use nu_engine::CallExt;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
@@ -134,20 +135,20 @@ impl Command for Sort {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let reverse = call.has_flag("reverse");
+        let reverse = call.has_flag(engine_state, stack, "reverse")?;
-        let insensitive = call.has_flag("ignore-case");
+        let insensitive = call.has_flag(engine_state, stack, "ignore-case")?;
-        let natural = call.has_flag("natural");
+        let natural = call.has_flag(engine_state, stack, "natural")?;
         let metadata = &input.metadata();
 
         let span = input.span().unwrap_or(call.head);
         match input {
             // Records have two sorting methods, toggled by presence or absence of -v
             PipelineData::Value(Value::Record { val, .. }, ..) => {
-                let sort_by_value = call.has_flag("values");
+                let sort_by_value = call.has_flag(engine_state, stack, "values")?;
                 let record = sort_record(val, span, sort_by_value, reverse, insensitive, natural);
                 Ok(record.into_pipeline_data())
             }

crates/nu-command/src/filters/sort_by.rs

@@ -85,9 +85,9 @@ impl Command for SortBy {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let columns: Vec<String> = call.rest(engine_state, stack, 0)?;
-        let reverse = call.has_flag("reverse");
+        let reverse = call.has_flag(engine_state, stack, "reverse")?;
-        let insensitive = call.has_flag("ignore-case");
+        let insensitive = call.has_flag(engine_state, stack, "ignore-case")?;
-        let natural = call.has_flag("natural");
+        let natural = call.has_flag(engine_state, stack, "natural")?;
         let metadata = &input.metadata();
         let mut vec: Vec<_> = input.into_iter_strict(call.head)?.collect();
 

crates/nu-command/src/filters/transpose.rs

@@ -145,11 +145,11 @@ pub fn transpose(
 ) -> Result<PipelineData, ShellError> {
     let name = call.head;
     let args = TransposeArgs {
-        header_row: call.has_flag("header-row"),
+        header_row: call.has_flag(engine_state, stack, "header-row")?,
-        ignore_titles: call.has_flag("ignore-titles"),
+        ignore_titles: call.has_flag(engine_state, stack, "ignore-titles")?,
-        as_record: call.has_flag("as-record"),
+        as_record: call.has_flag(engine_state, stack, "as-record")?,
-        keep_last: call.has_flag("keep-last"),
+        keep_last: call.has_flag(engine_state, stack, "keep-last")?,
-        keep_all: call.has_flag("keep-all"),
+        keep_all: call.has_flag(engine_state, stack, "keep-all")?,
         rest: call.rest(engine_state, stack, 0)?,
     };
 

crates/nu-command/src/filters/uniq.rs

@@ -1,5 +1,6 @@
 use crate::formats::value_to_string;
 use itertools::Itertools;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -247,7 +248,7 @@ fn generate_results_with_count(head: Span, uniq_values: Vec<ValueCounter>) -> Ve
 
 pub fn uniq(
     engine_state: &EngineState,
-    _stack: &mut Stack,
+    stack: &mut Stack,
     call: &Call,
     input: Vec<Value>,
     item_mapper: Box<dyn Fn(ItemMapperState) -> ValueCounter>,
@@ -255,10 +256,10 @@ pub fn uniq(
 ) -> Result<PipelineData, ShellError> {
     let ctrlc = engine_state.ctrlc.clone();
     let head = call.head;
-    let flag_show_count = call.has_flag("count");
+    let flag_show_count = call.has_flag(engine_state, stack, "count")?;
-    let flag_show_repeated = call.has_flag("repeated");
+    let flag_show_repeated = call.has_flag(engine_state, stack, "repeated")?;
-    let flag_ignore_case = call.has_flag("ignore-case");
+    let flag_ignore_case = call.has_flag(engine_state, stack, "ignore-case")?;
-    let flag_only_uniques = call.has_flag("unique");
+    let flag_only_uniques = call.has_flag(engine_state, stack, "unique")?;
 
     let uniq_values = input
         .into_iter()

crates/nu-command/src/filters/window.rs

@@ -120,7 +120,7 @@ impl Command for Window {
         let ctrlc = engine_state.ctrlc.clone();
         let metadata = input.metadata();
         let stride: Option<usize> = call.get_flag(engine_state, stack, "stride")?;
-        let remainder = call.has_flag("remainder");
+        let remainder = call.has_flag(engine_state, stack, "remainder")?;
 
         let stride = stride.unwrap_or(1);
 

crates/nu-command/src/formats/from/csv.rs

@@ -166,9 +166,9 @@ fn from_csv(
         .get_flag(engine_state, stack, "escape")?
         .map(|v: Value| v.as_char())
         .transpose()?;
-    let no_infer = call.has_flag("no-infer");
+    let no_infer = call.has_flag(engine_state, stack, "no-infer")?;
-    let noheaders = call.has_flag("noheaders");
+    let noheaders = call.has_flag(engine_state, stack, "noheaders")?;
-    let flexible = call.has_flag("flexible");
+    let flexible = call.has_flag(engine_state, stack, "flexible")?;
     let trim = trim_from_str(call.get_flag(engine_state, stack, "trim")?)?;
 
     let config = DelimitedReaderConfig {

crates/nu-command/src/formats/from/json.rs

@@ -1,3 +1,4 @@
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -47,7 +48,7 @@ impl Command for FromJson {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
@@ -59,7 +60,7 @@ impl Command for FromJson {
         }
 
         // TODO: turn this into a structured underline of the nu_json error
-        if call.has_flag("objects") {
+        if call.has_flag(engine_state, stack, "objects")? {
             let converted_lines: Vec<Value> = string_input
                 .lines()
                 .filter_map(move |x| {

crates/nu-command/src/formats/from/ssv.rs

@@ -289,8 +289,8 @@ fn from_ssv(
 ) -> Result<PipelineData, ShellError> {
     let name = call.head;
 
-    let noheaders = call.has_flag("noheaders");
+    let noheaders = call.has_flag(engine_state, stack, "noheaders")?;
-    let aligned_columns = call.has_flag("aligned-columns");
+    let aligned_columns = call.has_flag(engine_state, stack, "aligned-columns")?;
     let minimum_spaces: Option<Spanned<usize>> =
         call.get_flag(engine_state, stack, "minimum-spaces")?;
 

crates/nu-command/src/formats/from/tsv.rs

@@ -132,9 +132,9 @@ fn from_tsv(
         .get_flag(engine_state, stack, "escape")?
         .map(|v: Value| v.as_char())
         .transpose()?;
-    let no_infer = call.has_flag("no-infer");
+    let no_infer = call.has_flag(engine_state, stack, "no-infer")?;
-    let noheaders = call.has_flag("noheaders");
+    let noheaders = call.has_flag(engine_state, stack, "noheaders")?;
-    let flexible = call.has_flag("flexible");
+    let flexible = call.has_flag(engine_state, stack, "flexible")?;
     let trim = trim_from_str(call.get_flag(engine_state, stack, "trim")?)?;
 
     let config = DelimitedReaderConfig {

crates/nu-command/src/formats/from/xml.rs

@@ -1,5 +1,6 @@
 use crate::formats::nu_xml_format::{COLUMN_ATTRS_NAME, COLUMN_CONTENT_NAME, COLUMN_TAG_NAME};
 use indexmap::map::IndexMap;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -46,14 +47,14 @@ string. This way content of every tag is always a table and is easier to parse"#
 
     fn run(
         &self,
-        _engine_state: &EngineState,
+        engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let keep_comments = call.has_flag("keep-comments");
+        let keep_comments = call.has_flag(engine_state, stack, "keep-comments")?;
-        let keep_processing_instructions = call.has_flag("keep-pi");
+        let keep_processing_instructions = call.has_flag(engine_state, stack, "keep-pi")?;
         let info = ParsingInfo {
             span: head,
             keep_comments,

crates/nu-command/src/formats/to/csv.rs

@@ -67,7 +67,7 @@ impl Command for ToCsv {
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let noheaders = call.has_flag("noheaders");
+        let noheaders = call.has_flag(engine_state, stack, "noheaders")?;
         let separator: Option<Spanned<String>> = call.get_flag(engine_state, stack, "separator")?;
         let config = engine_state.get_config();
         to_csv(input, noheaders, separator, head, config)

crates/nu-command/src/formats/to/json.rs

@@ -44,8 +44,8 @@ impl Command for ToJson {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let raw = call.has_flag("raw");
+        let raw = call.has_flag(engine_state, stack, "raw")?;
-        let use_tabs = call.has_flag("tabs");
+        let use_tabs = call.has_flag(engine_state, stack, "tabs")?;
 
         let span = call.head;
         // allow ranges to expand and turn into array

crates/nu-command/src/formats/to/md.rs

@@ -1,5 +1,6 @@
 use indexmap::map::IndexMap;
 use nu_cmd_base::formats::to::delimited::merge_descriptors;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -67,13 +68,13 @@ impl Command for ToMd {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let pretty = call.has_flag("pretty");
+        let pretty = call.has_flag(engine_state, stack, "pretty")?;
-        let per_element = call.has_flag("per-element");
+        let per_element = call.has_flag(engine_state, stack, "per-element")?;
         let config = engine_state.get_config();
         to_md(input, pretty, per_element, config, head)
     }

crates/nu-command/src/formats/to/nuon.rs

@@ -53,20 +53,18 @@ impl Command for ToNuon {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let raw = call.has_flag("raw");
+        let raw = call.has_flag(engine_state, stack, "raw")?;
-        let use_tabs = call.has_flag("tabs");
+        let tabs: Option<usize> = call.get_flag(engine_state, stack, "tabs")?;
-        let use_indent = call.has_flag("indent");
+        let indent: Option<usize> = call.get_flag(engine_state, stack, "indent")?;
 
         let span = call.head;
         let value = input.into_value(span);
 
         let nuon_result = if raw {
             value_to_string(&value, span, 0, None)
-        } else if use_tabs {
+        } else if let Some(tab_count) = tabs {
-            let tab_count: usize = call.get_flag(engine_state, stack, "tabs")?.unwrap_or(1);
             value_to_string(&value, span, 0, Some(&"\t".repeat(tab_count)))
-        } else if use_indent {
+        } else if let Some(indent) = indent {
-            let indent: usize = call.get_flag(engine_state, stack, "indent")?.unwrap_or(2);
             value_to_string(&value, span, 0, Some(&" ".repeat(indent)))
         } else {
             value_to_string(&value, span, 0, None)

crates/nu-command/src/formats/to/tsv.rs

@@ -1,4 +1,5 @@
 use crate::formats::to::delimited::to_delimited_data;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
@@ -49,12 +50,12 @@ impl Command for ToTsv {
     fn run(
         &self,
         engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
         let head = call.head;
-        let noheaders = call.has_flag("noheaders");
+        let noheaders = call.has_flag(engine_state, stack, "noheaders")?;
         let config = engine_state.get_config();
         to_tsv(input, noheaders, head, config)
     }

crates/nu-command/src/generators/cal.rs

@@ -101,10 +101,10 @@ pub fn cal(
     let (current_year, current_month, current_day) = get_current_date();
 
     let arguments = Arguments {
-        year: call.has_flag("year"),
+        year: call.has_flag(engine_state, stack, "year")?,
-        month: call.has_flag("month"),
+        month: call.has_flag(engine_state, stack, "month")?,
-        month_names: call.has_flag("month-names"),
+        month_names: call.has_flag(engine_state, stack, "month-names")?,
-        quarter: call.has_flag("quarter"),
+        quarter: call.has_flag(engine_state, stack, "quarter")?,
         full_year: call.get_flag(engine_state, stack, "full-year")?,
         week_start: call.get_flag(engine_state, stack, "week-start")?,
     };

crates/nu-command/src/generators/seq_date.rs

@@ -129,7 +129,7 @@ impl Command for SeqDate {
         let end_date: Option<Spanned<String>> = call.get_flag(engine_state, stack, "end-date")?;
         let increment: Option<Spanned<i64>> = call.get_flag(engine_state, stack, "increment")?;
         let days: Option<Spanned<i64>> = call.get_flag(engine_state, stack, "days")?;
-        let reverse = call.has_flag("reverse");
+        let reverse = call.has_flag(engine_state, stack, "reverse")?;
 
         let outformat = match output_format {
             Some(s) => Some(Value::string(s.item, s.span)),

crates/nu-command/src/hash/generic_digest.rs

@@ -87,7 +87,7 @@ where
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let binary = call.has_flag("binary");
+        let binary = call.has_flag(engine_state, stack, "binary")?;
         let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
         let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
         let args = Arguments { binary, cell_paths };

crates/nu-command/src/math/stddev.rs

@@ -1,5 +1,6 @@
 use super::variance::compute_variance as variance;
 use crate::math::utils::run_with_function;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -40,12 +41,12 @@ impl Command for SubCommand {
 
     fn run(
         &self,
-        _engine_state: &EngineState,
+        engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let sample = call.has_flag("sample");
+        let sample = call.has_flag(engine_state, stack, "sample")?;
         run_with_function(call, input, compute_stddev(sample))
     }
 

crates/nu-command/src/math/variance.rs

@@ -1,4 +1,5 @@
 use crate::math::utils::run_with_function;
+use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
@@ -32,12 +33,12 @@ impl Command for SubCommand {
 
     fn run(
         &self,
-        _engine_state: &EngineState,
+        engine_state: &EngineState,
-        _stack: &mut Stack,
+        stack: &mut Stack,
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let sample = call.has_flag("sample");
+        let sample = call.has_flag(engine_state, stack, "sample")?;
         run_with_function(call, input, compute_variance(sample))
     }
 

crates/nu-command/src/network/http/delete.rs

@@ -170,13 +170,13 @@ fn run_delete(
         headers: call.get_flag(engine_state, stack, "headers")?,
         data: call.get_flag(engine_state, stack, "data")?,
         content_type: call.get_flag(engine_state, stack, "content-type")?,
-        raw: call.has_flag("raw"),
+        raw: call.has_flag(engine_state, stack, "raw")?,
-        insecure: call.has_flag("insecure"),
+        insecure: call.has_flag(engine_state, stack, "insecure")?,
         user: call.get_flag(engine_state, stack, "user")?,
         password: call.get_flag(engine_state, stack, "password")?,
         timeout: call.get_flag(engine_state, stack, "max-time")?,
-        full: call.has_flag("full"),
+        full: call.has_flag(engine_state, stack, "full")?,
-        allow_errors: call.has_flag("allow-errors"),
+        allow_errors: call.has_flag(engine_state, stack, "allow-errors")?,
         redirect: call.get_flag(engine_state, stack, "redirect-mode")?,
     };
 

crates/nu-command/src/network/http/get.rs

@@ -154,13 +154,13 @@ fn run_get(
     let args = Arguments {
         url: call.req(engine_state, stack, 0)?,
         headers: call.get_flag(engine_state, stack, "headers")?,
-        raw: call.has_flag("raw"),
+        raw: call.has_flag(engine_state, stack, "raw")?,
-        insecure: call.has_flag("insecure"),
+        insecure: call.has_flag(engine_state, stack, "insecure")?,
         user: call.get_flag(engine_state, stack, "user")?,
         password: call.get_flag(engine_state, stack, "password")?,
         timeout: call.get_flag(engine_state, stack, "max-time")?,
-        full: call.has_flag("full"),
+        full: call.has_flag(engine_state, stack, "full")?,
-        allow_errors: call.has_flag("allow-errors"),
+        allow_errors: call.has_flag(engine_state, stack, "allow-errors")?,
         redirect: call.get_flag(engine_state, stack, "redirect-mode")?,
     };
     helper(engine_state, stack, call, args)

crates/nu-command/src/network/http/head.rs

@@ -132,7 +132,7 @@ fn run_head(
     let args = Arguments {
         url: call.req(engine_state, stack, 0)?,
         headers: call.get_flag(engine_state, stack, "headers")?,
-        insecure: call.has_flag("insecure"),
+        insecure: call.has_flag(engine_state, stack, "insecure")?,
         user: call.get_flag(engine_state, stack, "user")?,
         password: call.get_flag(engine_state, stack, "password")?,
         timeout: call.get_flag(engine_state, stack, "max-time")?,

crates/nu-command/src/network/http/options.rs

@@ -139,11 +139,11 @@ fn run_get(
     let args = Arguments {
         url: call.req(engine_state, stack, 0)?,
         headers: call.get_flag(engine_state, stack, "headers")?,
-        insecure: call.has_flag("insecure"),
+        insecure: call.has_flag(engine_state, stack, "insecure")?,
         user: call.get_flag(engine_state, stack, "user")?,
         password: call.get_flag(engine_state, stack, "password")?,
         timeout: call.get_flag(engine_state, stack, "max-time")?,
-        allow_errors: call.has_flag("allow-errors"),
+        allow_errors: call.has_flag(engine_state, stack, "allow-errors")?,
     };
     helper(engine_state, stack, call, args)
 }