246 lines
8.7 KiB
Rust
246 lines
8.7 KiB
Rust
use std::io::ErrorKind;
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use std::path::PathBuf;
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use chrono::{DateTime, FixedOffset};
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use filetime::FileTime;
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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, Span, Spanned, SyntaxShape, Type,
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};
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use uu_touch::error::TouchError;
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use uu_touch::{ChangeTimes, InputFile, Options, Source};
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#[derive(Clone)]
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pub struct UTouch;
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impl Command for UTouch {
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fn name(&self) -> &str {
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"utouch"
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["create", "file"]
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}
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fn signature(&self) -> Signature {
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Signature::build("utouch")
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.input_output_types(vec![ (Type::Nothing, Type::Nothing) ])
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.required(
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"filename",
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SyntaxShape::Filepath,
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"The path of the file you want to create.",
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)
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.named(
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"reference",
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SyntaxShape::Filepath,
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"change the file or directory time to the time of the reference file/directory",
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Some('r'),
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)
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.named(
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"timestamp",
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SyntaxShape::DateTime,
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"use the given time instead of the current time",
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Some('t')
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)
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.named(
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"date",
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SyntaxShape::String,
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"use the given date instead of the current date",
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Some('d')
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)
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.switch(
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"modified",
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"change the modification time of the file or directory. If no timestamp, date or reference file/directory is given, the current time is used",
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Some('m'),
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)
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.switch(
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"access",
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"change the access time of the file or directory. If no timestamp, date or reference file/directory is given, the current time is used",
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Some('a'),
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)
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.switch(
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"no-create",
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"do not create the file if it does not exist",
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Some('c'),
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)
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.switch(
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"no-dereference",
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"affect each symbolic link instead of any referenced file (only for systems that can change the timestamps of a symlink)",
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None
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)
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.rest("rest", SyntaxShape::Filepath, "Additional files to create.")
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.category(Category::FileSystem)
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}
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fn usage(&self) -> &str {
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"Creates one or more files."
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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 change_mtime: bool = call.has_flag(engine_state, stack, "modified")?;
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let change_atime: bool = call.has_flag(engine_state, stack, "access")?;
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let no_create: bool = call.has_flag(engine_state, stack, "no-create")?;
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let no_deref: bool = call.has_flag(engine_state, stack, "no-dereference")?;
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let target: Spanned<String> = call.req(engine_state, stack, 0)?;
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let rest: Vec<Spanned<String>> = call.rest(engine_state, stack, 1)?;
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let (reference_file, reference_span) = if let Some(reference) =
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call.get_flag::<Spanned<PathBuf>>(engine_state, stack, "reference")?
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{
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(Some(reference.item), Some(reference.span))
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} else {
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(None, None)
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};
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let (date_str, date_span) =
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if let Some(date) = call.get_flag::<Spanned<String>>(engine_state, stack, "date")? {
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(Some(date.item), Some(date.span))
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} else {
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(None, None)
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};
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let timestamp: Option<Spanned<DateTime<FixedOffset>>> =
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call.get_flag(engine_state, stack, "timestamp")?;
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let source = if let Some(timestamp) = timestamp {
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if let Some(reference_span) = reference_span {
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return Err(ShellError::IncompatibleParameters {
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left_message: "timestamp given".to_string(),
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left_span: timestamp.span,
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right_message: "reference given".to_string(),
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right_span: reference_span,
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});
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}
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if let Some(date_span) = date_span {
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return Err(ShellError::IncompatibleParameters {
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left_message: "timestamp given".to_string(),
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left_span: timestamp.span,
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right_message: "date given".to_string(),
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right_span: date_span,
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});
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}
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Source::Timestamp(FileTime::from_unix_time(
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timestamp.item.timestamp(),
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timestamp.item.timestamp_subsec_nanos(),
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))
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} else if let Some(reference_file) = reference_file {
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Source::Reference(reference_file)
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} else {
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Source::Now
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};
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let change_times = if change_atime && !change_mtime {
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ChangeTimes::AtimeOnly
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} else if change_mtime && !change_atime {
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ChangeTimes::MtimeOnly
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} else {
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ChangeTimes::Both
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};
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let mut files = vec![InputFile::Path(PathBuf::from(target.item))];
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let mut file_spans = vec![target.span];
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for file in rest {
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files.push(InputFile::Path(PathBuf::from(file.item)));
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file_spans.push(file.span);
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}
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if let Err(err) = uu_touch::touch(
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&files,
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&Options {
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no_create,
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no_deref,
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source,
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date: date_str,
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change_times,
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strict: true,
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},
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) {
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let nu_err = match err {
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TouchError::InvalidDateFormat(date) => ShellError::IncorrectValue {
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msg: format!("Invalid date: {}", date),
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val_span: date_span.expect("utouch was given a date"),
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call_span: call.head,
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},
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TouchError::ReferenceFileInaccessible(reference_path, io_err) => {
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let span = reference_span.expect("utouch was given a reference file");
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if io_err.kind() == ErrorKind::NotFound {
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// todo merge main into this to say which file not found
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ShellError::FileNotFound {
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span,
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file: reference_path.display().to_string(),
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}
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} else {
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io_to_nu_err(
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io_err,
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format!("Failed to read metadata of {}", reference_path.display()),
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span,
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)
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}
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}
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_ => ShellError::GenericError {
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error: err.to_string(),
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msg: err.to_string(),
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span: Some(call.head),
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help: None,
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inner: Vec::new(),
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},
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};
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return Err(nu_err);
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}
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Ok(PipelineData::empty())
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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: "Creates \"fixture.json\"",
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example: "utouch fixture.json",
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result: None,
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},
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Example {
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description: "Creates files a, b and c",
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example: "utouch a b c",
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result: None,
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},
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Example {
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description: r#"Changes the last modified time of "fixture.json" to today's date"#,
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example: "utouch -m fixture.json",
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result: None,
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},
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Example {
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description: "Changes the last modified time of files a, b and c to the current time but yesterday",
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example: r#"utouch -m -d "yesterday" a b c"#,
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result: None,
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},
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Example {
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description: r#"Changes the last modified time of file d and e to "fixture.json"'s last modified time"#,
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example: r#"utouch -m -r fixture.json d e"#,
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result: None,
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},
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Example {
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description: r#"Changes the last accessed time of "fixture.json" to a datetime"#,
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example: r#"utouch -a -t 2019-08-24T12:30:30 fixture.json"#,
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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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fn io_to_nu_err(err: std::io::Error, msg: String, span: Span) -> ShellError {
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ShellError::GenericError {
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error: err.to_string(),
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msg,
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span: Some(span),
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help: None,
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inner: Vec::new(),
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}
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}
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