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-rw-r--r--builtin-diff.c5
-rwxr-xr-xt/t4020-diff-external.sh21
2 files changed, 25 insertions, 1 deletions
diff --git a/builtin-diff.c b/builtin-diff.c
index 7ceceeb6f..b90d8bcdb 100644
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -290,6 +290,9 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
/* Otherwise, we are doing the usual "git" diff */
rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
+ /* Default to let external be used */
+ DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
+
if (nongit)
die("Not a git repository");
argc = setup_revisions(argc, argv, &rev, NULL);
@@ -298,7 +301,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
if (diff_setup_done(&rev.diffopt) < 0)
die("diff_setup_done failed");
}
- DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
+
DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
diff --git a/t/t4020-diff-external.sh b/t/t4020-diff-external.sh
index dfe3fbc74..caea292f1 100755
--- a/t/t4020-diff-external.sh
+++ b/t/t4020-diff-external.sh
@@ -43,6 +43,13 @@ test_expect_success 'GIT_EXTERNAL_DIFF environment should apply only to diff' '
'
+test_expect_success 'GIT_EXTERNAL_DIFF environment and --no-ext-diff' '
+
+ GIT_EXTERNAL_DIFF=echo git diff --no-ext-diff |
+ grep "^diff --git a/file b/file"
+
+'
+
test_expect_success 'diff attribute' '
git config diff.parrot.command echo &&
@@ -68,6 +75,13 @@ test_expect_success 'diff attribute should apply only to diff' '
'
+test_expect_success 'diff attribute and --no-ext-diff' '
+
+ git diff --no-ext-diff |
+ grep "^diff --git a/file b/file"
+
+'
+
test_expect_success 'diff attribute' '
git config --unset diff.parrot.command &&
@@ -94,6 +108,13 @@ test_expect_success 'diff attribute should apply only to diff' '
'
+test_expect_success 'diff attribute and --no-ext-diff' '
+
+ git diff --no-ext-diff |
+ grep "^diff --git a/file b/file"
+
+'
+
test_expect_success 'no diff with -diff' '
echo >.gitattributes "file -diff" &&
git diff | grep Binary