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deprecate glob --not
in favor of glob --exclude
(#10827)
# Description looking at the [Wax documentation about `wax::Walk.not`](https://docs.rs/wax/latest/wax/struct.Walk.html#examples), especially > therefore does not read directory trees from the file system when a directory matches an [exhaustive glob expression](https://docs.rs/wax/latest/wax/trait.Pattern.html#tymethod.is_exhaustive) > **Important** > in the following of this PR description, i talk about *pruning* and a `--prune` option, but this has been changed to *exclusion* and `--exclude` after a discussion with @fdncred. this looks like a *pruning* operation to me, right? 😮 i wanted to make the `glob` option `--not` clearer about that, because > -n, --not <List(String)> - Patterns to exclude from the results from `help glob` is not very explicit about whether the search is pruned when entering a directory matching a pattern in `--not` or just removing it from the output 😕 ## changelog this PR proposes to rename the `glob --not` option to `glob --prune` and make it's documentation more explicit 😋 ## benchmarking to support the *pruning* behaviour put forward above, i've run a benchmark 1. define two closures to compare the behaviour between removing patterns manually or using `--not` ```nushell let where = { [.*/\.local/.*, .*/documents/.*, .*/\.config/.*] | reduce --fold (glob **) {|pat, acc| $acc | where $it !~ $pat} | length } ``` ```nushell let not = { glob ** --not [**/.local/**, **/documents/**, **/.config/**] | length } ``` 2. run the two to make sure they give similar results ```nushell > do $where 33424 ``` ```nushell > do $not 33420 ``` 👌 3. measure the performance ```nushell use std bench ``` ```nushell > bench --verbose --pretty --rounds 25 $not 44ms 52µs 285ns +/- 977µs 571ns ``` ```nushell > bench --verbose --pretty --rounds 5 $where 1sec 250ms 187µs 99ns +/- 8ms 538µs 57ns ``` 👉 we can see that the results are (almost) the same but `--not` is much faster, looks like pruning 😋 # User-Facing Changes - `--not` will give a warning message but still work - `--prune` will work just as `--not` without warning and with a more explicit doc - `--prune` and `--not` at the same time will give an error # Tests + Formatting this PR fixes the examples of `glob` using the `--not` option. # After Submitting prepare the removal PR and mention in release notes.
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@ -46,9 +46,15 @@ impl Command for Glob {
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.named(
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"not",
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SyntaxShape::List(Box::new(SyntaxShape::String)),
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"Patterns to exclude from the results",
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"DEPRECATED OPTION: Patterns to exclude from the results",
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Some('n'),
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)
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.named(
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"exclude",
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SyntaxShape::List(Box::new(SyntaxShape::String)),
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"Patterns to exclude from the search: `glob` will not walk the inside of directories matching the excluded patterns.",
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Some('e'),
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)
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.category(Category::FileSystem)
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}
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@ -111,12 +117,12 @@ impl Command for Glob {
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},
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Example {
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description: "Search for files named tsconfig.json that are not in node_modules directories",
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example: r#"glob **/tsconfig.json --not [**/node_modules/**]"#,
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example: r#"glob **/tsconfig.json --exclude [**/node_modules/**]"#,
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result: None,
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},
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Example {
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description: "Search for all files that are not in the target nor .git directories",
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example: r#"glob **/* --not [**/target/** **/.git/** */]"#,
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example: r#"glob **/* --exclude [**/target/** **/.git/** */]"#,
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result: None,
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},
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]
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@ -141,8 +147,37 @@ impl Command for Glob {
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let no_files = call.has_flag("no-file");
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let no_symlinks = call.has_flag("no-symlink");
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if call.has_flag("not") {
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nu_protocol::report_error_new(
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engine_state,
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&ShellError::GenericError(
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"Deprecated option".into(),
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"`glob --not {list<string>}` is deprecated and will be removed in 0.88.".into(),
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Some(call.head),
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Some("Please use `glob --exclude {list<string>}` instead.".into()),
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vec![],
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),
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);
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}
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let not_flag: Option<Value> = call.get_flag(engine_state, stack, "not")?;
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let (not_patterns, not_pattern_span): (Vec<String>, Span) = match not_flag {
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let exclude_flag: Option<Value> = call.get_flag(engine_state, stack, "exclude")?;
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let paths_to_exclude = match (not_flag, exclude_flag) {
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(Some(not_flag), Some(exclude_flag)) => {
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return Err(ShellError::IncompatibleParameters {
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left_message: "Cannot pass --not".into(),
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left_span: not_flag.span(),
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right_message: "and --exclude".into(),
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right_span: exclude_flag.span(),
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})
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}
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(Some(not_flag), None) => Some(not_flag),
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(None, Some(exclude_flag)) => Some(exclude_flag),
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(None, None) => None,
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};
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let (not_patterns, not_pattern_span): (Vec<String>, Span) = match paths_to_exclude {
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None => (vec![], span),
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Some(f) => {
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let pat_span = f.span();
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