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doc: document '{a,b}' glob syntax

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This syntax does not exist in `git`, so it is not documented in `man
gitignore`. There is a question of whether it *should* exist, but as
long as it does, it should be documented somewhere.

See also:
https://github.com/BurntSushi/ripgrep/issues/1221
https://github.com/BurntSushi/ripgrep/issues/1368

Closes #1816
This commit is contained in:
Ilya Grigoriev
2021-03-09 14:12:15 -08:00
committed by Andrew Gallant
parent b3a6a69f9d
commit 51d2db7f19
2 changed files with 9 additions and 0 deletions
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7
crates/core/app.rs
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@ -1358,6 +1358,13 @@ used. Globbing rules match .gitignore globs. Precede a glob with a ! to exclude
it. If multiple globs match a file or directory, the glob given later in the
command line takes precedence.
As an extension, globs support specifying alternatives: *-g ab{c,d}* is
equivalet to *-g abc -g abd*. Empty alternatives like *-g ab{,c}* are not
currently supported. Note that this syntax extension is also currently enabled
in gitignore files, even though this syntax isn't supported by git itself.
ripgrep may disable this syntax extension in gitignore files, but it will
always remain available via the -g/--glob flag.
When this flag is set, every file and directory is applied to it to test for
a match. So for example, if you only want to search in a particular directory
'foo', then *-g foo* is incorrect because 'foo/bar' does not match the glob