[PATCH] gdb/testsuite: fix git repository check in gdb.src/pre-commit.exp

[Andrew Burgess <aburgess@redhat.com>]

In the recently added gdb.src/pre-commit.exp test, we check if the
source directory is a git repository like this:

  if {![file isdirectory $repodir/.git]} {
      unsupported "Not in a git repository"
      return
  }

I make extensive use of git worktrees for development.  In a worktree
.git is a file containing the location of the actual .git directory,
it is not itself a directory.  As such, the above check fails,
claiming my source tree is not a git repository, when in fact, it is.

Fix this by relaxing the check to 'file exists $repodir/.git', which
will cover the directory and file case.
---
 gdb/testsuite/gdb.src/pre-commit.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.src/pre-commit.exp b/gdb/testsuite/gdb.src/pre-commit.exp
index 5fb0dfed6d7..8745b31272e 100644
--- a/gdb/testsuite/gdb.src/pre-commit.exp
+++ b/gdb/testsuite/gdb.src/pre-commit.exp
@@ -17,7 +17,7 @@
 
 set repodir $srcdir/../..
 
-if {![file isdirectory $repodir/.git]} {
+if {![file exists $repodir/.git]} {
     unsupported "Not in a git repository"
     return
 }

base-commit: 7d169f96d5f372c76ee560355af3dcac4355418f
-- 
2.47.1