fetch-pack: avoid repeatedly re-scanning pack directory

diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index bbe71e5f73a0b1a95c8afc4365a8b7c93bfcf40d..9c3e997b9d6be69467a78f9ff8b1ff746be8e9b6 100755 (executable)
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -83,6 +83,17 @@ test_expect_success PERL 'difftool ignores bad --tool values' '
        test "$diff" = ""
 '
 
+test_expect_success PERL 'difftool forwards arguments to diff' '
+       >for-diff &&
+       git add for-diff &&
+       echo changes>for-diff &&
+       git add for-diff &&
+       diff=$(git difftool --cached --no-prompt -- for-diff) &&
+       test "$diff" = "" &&
+       git reset -- for-diff &&
+       rm for-diff
+'
+
 test_expect_success PERL 'difftool honors --gui' '
        git config merge.tool bogus-tool &&
        git config diff.tool bogus-tool &&