Rev-parse understands that a "--" may separate revisions and
filenames, and that anything after the "--" is taken as-is.
However, it does not understand that anything before the
token must be a revision (which is the usual rule
implemented by the setup_revisions parser).
Since rev-parse prefers revisions to files when parsing
before the "--", we end up with the correct result (if such
an argument is a revision, we parse it as one, and if it is
not, it is an error either way). However, we misdiagnose
the errors:
$ git rev-parse foobar -- >/dev/null
fatal: ambiguous argument 'foobar': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
$ >foobar
$ git rev-parse foobar -- >/dev/null
fatal: bad flag '--' used after filename
In both cases, we should know that the real error is that
"foobar" is meant to be a revision, but could not be
resolved.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
builtin/rev-parse.c | 10 ++++++++++
t/t1506-rev-parse-diagnosis.sh | 24 ++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index 1d9ecaf..bb694ab 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -488,6 +488,7 @@ N_("git rev-parse --parseopt [options] -- [<args>...]\n"
int cmd_rev_parse(int argc, const char **argv, const char *prefix)
{
int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
+ int has_dashdash = 0;
int output_prefix = 0;
unsigned char sha1[20];
const char *name = NULL;
@@ -501,6 +502,13 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
if (argc > 1 && !strcmp("-h", argv[1]))
usage(builtin_rev_parse_usage);
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "--")) {
+ has_dashdash = 1;
+ break;
+ }
+ }
+
prefix = setup_git_directory();
git_config(git_default_config, NULL);
for (i = 1; i < argc; i++) {
@@ -788,6 +796,8 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
}
if (verify)
die_no_single_rev(quiet);
+ if (has_dashdash)
+ die("bad revision '%s'", arg);
as_is = 1;
if (!show_file(arg, output_prefix))
continue;
diff --git a/t/t1506-rev-parse-diagnosis.sh b/t/t1506-rev-parse-diagnosis.sh
index f950c10..613d9bf 100755
--- a/t/t1506-rev-parse-diagnosis.sh
+++ b/t/t1506-rev-parse-diagnosis.sh
@@ -196,4 +196,28 @@ test_expect_success 'dotdot is not an empty set' '
test_cmp expect actual
'
+test_expect_success 'arg before dashdash must be a revision (missing)' '
+ test_must_fail git rev-parse foobar -- 2>stderr &&
+ test_i18ngrep "bad revision" stderr
+'
+
+test_expect_success 'arg before dashdash must be a revision (file)' '
+ >foobar &&
+ test_must_fail git rev-parse foobar -- 2>stderr &&
+ test_i18ngrep "bad revision" stderr
+'
+
+test_expect_success 'arg before dashdash must be a revision (ambiguous)' '
+ >foobar &&
+ git update-ref refs/heads/foobar HEAD &&
+ {
+ # we do not want to use rev-parse here, because
+ # we are testing it
+ cat .git/refs/heads/foobar &&
+ printf "%s\n" --
+ } >expect &&
+ git rev-parse foobar -- >actual &&
+ test_cmp expect actual
+'
+
test_done
--
1.8.5.524.g6743da6
--
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