Add a --git-ignore option that doesn’t do anything

!!

README.md

@@ -30,6 +30,7 @@ exa’s options are almost, but not quite, entirely unlike `ls`'s.
 - **-r**, **--reverse**: reverse the sort order
 - **-s**, **--sort=(field)**: which field to sort by
 - **--group-directories-first**: list directories before other files
+- **--git-ignore**: ignore files mentioned in `.gitignore`
 - **-I**, **--ignore-glob=(globs)**: glob patterns (pipe-separated) of files to ignore
 
 Pass the `--all` option twice to also show the `.` and `..` directories.

contrib/completions.fish

@@ -17,6 +17,7 @@ complete -c exa        -l 'colour-scale' -d "Highlight levels of file sizes dist
 
 # Filtering and sorting options
 complete -c exa -l 'group-directories-first' -d "Sort directories before other files"
+complete -c exa -l 'git-ignore'           -d "Ignore files mentioned in '.gitignore'"
 complete -c exa -s 'a' -l 'all'       -d "Show and 'dot' files"
 complete -c exa -s 'd' -l 'list-dirs' -d "List directories like regular files"
 complete -c exa -s 'L' -l 'level'     -d "Limit the depth of recursion" -a "1 2 3 4 5 6 7 8 9"

contrib/completions.zsh

@@ -14,6 +14,7 @@ __exa() {
         {--color,--colour}"[When to use terminal colours]" \
         {--color,--colour}-scale"[Highlight levels of file sizes distinctly]" \
         --group-directories-first"[Sort directories before other files]" \
+        --git-ignore"[Ignore files mentioned in '.gitignore']" \
         {-a,--all}"[Show hidden and 'dot' files]" \
         {-d,--list-dirs}"[List directories like regular files]" \
         {-L,--level}"+[Limit the depth of recursion]" \

contrib/man/exa.1

@@ -88,6 +88,11 @@ Glob patterns, pipe-separated, of files to ignore
 .RS
 .RE
 .TP
+.B \-\-git\-ignore
+ignore files mentioned in '.gitignore'
+.RS
+.RE
+.TP
 .B \-\-group\-directories\-first
 list directories before other files
 .RS

src/fs/filter.rs

@@ -305,6 +305,26 @@ impl IgnorePatterns {
 }
 
 
+/// Whether to ignore or display files that are mentioned in `.gitignore` files.
+#[derive(PartialEq, Debug, Copy, Clone)]
+pub enum GitIgnore {
+
+    /// Ignore files that Git would ignore. This means doing a check for a
+    /// `.gitignore` file, possibly recursively up the filesystem tree.
+    CheckAndIgnore,
+
+    /// Display files, even if Git would ignore them.
+    Off,
+}
+
+// This is not fully baked yet. The `ignore` crate lists a lot more files that
+// we aren’t checking:
+//
+// > By default, all ignore files found are respected. This includes .ignore,
+// > .gitignore, .git/info/exclude and even your global gitignore globs,
+// > usually found in $XDG_CONFIG_HOME/git/ignore.
+
+
 
 #[cfg(test)]
 mod test_ignores {

src/options/filter.rs

@@ -1,7 +1,7 @@
 //! Parsing the options for `FileFilter`.
 
 use fs::DotFilter;
-use fs::filter::{FileFilter, SortField, SortCase, IgnorePatterns};
+use fs::filter::{FileFilter, SortField, SortCase, IgnorePatterns, GitIgnore};
 
 use options::{flags, Misfire};
 use options::parser::MatchedFlags;
@@ -180,6 +180,14 @@ impl IgnorePatterns {
 }
 
 
+impl GitIgnore {
+    pub fn deduce(matches: &MatchedFlags) -> Result<Self, Misfire> {
+        Ok(if matches.has(&flags::GIT_IGNORE)? { GitIgnore::CheckAndIgnore }
+                                          else { GitIgnore::Off })
+    }
+}
+
+
 
 #[cfg(test)]
 mod test {
@@ -196,7 +204,7 @@ mod test {
                 use options::test::parse_for_test;
                 use options::test::Strictnesses::*;
 
-                static TEST_ARGS: &[&Arg] = &[ &flags::SORT, &flags::ALL, &flags::TREE, &flags::IGNORE_GLOB ];
+                static TEST_ARGS: &[&Arg] = &[ &flags::SORT, &flags::ALL, &flags::TREE, &flags::IGNORE_GLOB, &flags::GIT_IGNORE ];
                 for result in parse_for_test($inputs.as_ref(), TEST_ARGS, $stricts, |mf| $type::deduce(mf)) {
                     assert_eq!(result, $result);
                 }
@@ -275,4 +283,12 @@ mod test {
         test!(overridden_3: IgnorePatterns <- ["-I=*.ogg",    "-I", "*.mp3"];  Complain => Err(Misfire::Duplicate(Flag::Short(b'I'), Flag::Short(b'I'))));
         test!(overridden_4: IgnorePatterns <- ["-I", "*.OGG", "-I*.MP3"];      Complain => Err(Misfire::Duplicate(Flag::Short(b'I'), Flag::Short(b'I'))));
     }
+
+
+    mod git_ignores {
+        use super::*;
+
+        test!(off:  GitIgnore <- [];                Both => Ok(GitIgnore::Off));
+        test!(on:   GitIgnore <- ["--git-ignore"];  Both => Ok(GitIgnore::CheckAndIgnore));
+    }
 }

src/options/flags.rs

@@ -28,6 +28,7 @@ pub static LEVEL:       Arg = Arg { short: Some(b'L'), long: "level",       take
 pub static REVERSE:     Arg = Arg { short: Some(b'r'), long: "reverse",     takes_value: TakesValue::Forbidden };
 pub static SORT:        Arg = Arg { short: Some(b's'), long: "sort",        takes_value: TakesValue::Necessary(Some(SORTS)) };
 pub static IGNORE_GLOB: Arg = Arg { short: Some(b'I'), long: "ignore-glob", takes_value: TakesValue::Necessary(None) };
+pub static GIT_IGNORE:  Arg = Arg { short: None, long: "git-ignore",           takes_value: TakesValue::Forbidden };
 pub static DIRS_FIRST:  Arg = Arg { short: None, long: "group-directories-first",  takes_value: TakesValue::Forbidden };
 const SORTS: Values = &[ "name", "Name", "size", "extension",
                              "Extension", "modified", "accessed",
@@ -60,7 +61,8 @@ pub static ALL_ARGS: Args = Args(&[
     &ONE_LINE, &LONG, &GRID, &ACROSS, &RECURSE, &TREE, &CLASSIFY,
     &COLOR, &COLOUR, &COLOR_SCALE, &COLOUR_SCALE,
 
-    &ALL, &LIST_DIRS, &LEVEL, &REVERSE, &SORT, &IGNORE_GLOB, &DIRS_FIRST,
+    &ALL, &LIST_DIRS, &LEVEL, &REVERSE, &SORT, &DIRS_FIRST,
+    &IGNORE_GLOB, &GIT_IGNORE,
 
     &BINARY, &BYTES, &GROUP, &HEADER, &INODE, &LINKS, &MODIFIED, &BLOCKS,
     &TIME, &ACCESSED, &CREATED, &TIME_STYLE,

src/options/help.rs

@@ -27,6 +27,7 @@ FILTERING AND SORTING OPTIONS
   -s, --sort SORT_FIELD      which field to sort by
   --group-directories-first  list directories before other files
   -I, --ignore-glob GLOBS    glob patterns (pipe-separated) of files to ignore
+  --git-ignore               Ignore files mentioned in '.gitignore'
   Valid sort fields:         name, Name, extension, Extension, size, type,
                              modified, accessed, created, inode, and none.
                              date, time, old, and new all refer to modified.

xtests/help

@@ -22,6 +22,7 @@ FILTERING AND SORTING OPTIONS
   -s, --sort SORT_FIELD      which field to sort by
   --group-directories-first  list directories before other files
   -I, --ignore-glob GLOBS    glob patterns (pipe-separated) of files to ignore
+  --git-ignore               Ignore files mentioned in '.gitignore'
   Valid sort fields:         name, Name, extension, Extension, size, type,
                              modified, accessed, created, inode, and none.
                              date, time, old, and new all refer to modified.