87 lines
2.8 KiB
Rust
87 lines
2.8 KiB
Rust
use super::{list_shells, switch_shell, SwitchTo};
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use nu_engine::CallExt;
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use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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Category, Example, PipelineData, ShellError, Signature, Spanned, SyntaxShape, Type,
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};
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/// Source a file for environment variables.
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#[derive(Clone)]
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pub struct GotoShell;
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impl Command for GotoShell {
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fn name(&self) -> &str {
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"g"
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}
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fn signature(&self) -> Signature {
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Signature::build("g")
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.input_output_types(vec![
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(Type::Nothing, Type::Nothing),
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(Type::Nothing, Type::Table(vec![])),
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])
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.optional(
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"shell_number",
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SyntaxShape::String,
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"shell number to change to",
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)
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.category(Category::Shells)
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}
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fn usage(&self) -> &str {
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"Switch to a given shell, or list all shells if no given shell number."
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let new_shell: Option<Spanned<String>> = call.opt(engine_state, stack, 0)?;
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match new_shell {
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Some(shell_span) => {
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if shell_span.item == "-" {
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switch_shell(engine_state, stack, call, shell_span.span, SwitchTo::Last)
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} else {
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let n = shell_span
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.item
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.parse::<usize>()
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.map_err(|_| ShellError::NotFound(shell_span.span))?;
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switch_shell(engine_state, stack, call, shell_span.span, SwitchTo::Nth(n))
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}
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}
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None => list_shells(engine_state, stack, call.head),
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}
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Lists all open shells",
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example: r#"g"#,
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result: None,
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},
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Example {
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description: "Make two directories and enter new shells for them, use `g` to jump to the specific shell",
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example: r#"mkdir foo bar; enter foo; enter ../bar; g 1"#,
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result: None,
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},
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Example {
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description: "Use `shells` to show all the opened shells and run `g 2` to jump to the third one",
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example: r#"shells; g 2"#,
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result: None,
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},
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Example {
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description: "Make two directories and enter new shells for them, use `g -` to jump to the last used shell",
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example: r#"mkdir foo bar; enter foo; enter ../bar; g -"#,
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result: None,
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},
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]
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}
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}
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