ignore: use git commondir for sourcing .git/info/exclude

Git looks for this file in GIT_COMMON_DIR, which is usually the same
as GIT_DIR (.git). However, when searching inside a linked worktree,
.git is usually a file that contains the path of the actual git dir,
which in turn contains a file "commondir" which references the directory
where info/exclude may reside, alongside other configuration shared across
all worktrees. This directory is usually the git dir of the main worktree.

Unlike git this does *not* read environment variables GIT_DIR and
GIT_COMMON_DIR, because it is not clear how to interpret them when
searching multiple repositories.

Fixes #1445, Closes #1446

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/regression.rs b/tests/regression.rs
index e8c915ae..6d925744 100644
--- a/tests/regression.rs
+++ b/tests/regression.rs
@@ -738,3 +738,19 @@ rgtest!(r1334_crazy_literals, |dir: Dir, mut cmd: TestCommand| {
         cmd.arg("-Ff").arg("patterns").arg("corpus").stdout()
     );
 });
+
+// See: https://github.com/BurntSushi/ripgrep/pull/1446
+rgtest!(r1446_respect_excludes_in_worktree, |dir: Dir, mut cmd: TestCommand| {
+    dir.create_dir("repo/.git/info");
+    dir.create("repo/.git/info/exclude", "ignored");
+    dir.create_dir("repo/.git/worktrees/repotree");
+    dir.create("repo/.git/worktrees/repotree/commondir", "../..");
+
+    dir.create_dir("repotree");
+    dir.create("repotree/.git", "gitdir: repo/.git/worktrees/repotree");
+    dir.create("repotree/ignored", "");
+    dir.create("repotree/not-ignored", "");
+
+    cmd.arg("--sort").arg("path").arg("--files").arg("repotree");
+    eqnice!("repotree/not-ignored\n", cmd.stdout());
+});