refs: make rev-parse --quiet actually quiet

When a reflog is deleted, e.g. when "git stash" clears its stashes,
"git rev-parse --verify --quiet" dies:

	fatal: Log for refs/stash is empty.

The reason is that the get_sha1() code path does not allow us
to suppress this message.

Pass the flags bitfield through get_sha1_with_context() so that
read_ref_at() can suppress the message.

Use get_sha1_with_context1() instead of get_sha1() in rev-parse
so that the --quiet flag is honored.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index c911b456dedd648e36a876c6175c23e1ef028a43..35d3c43ed656bf28b78501426f4502c0dff1e7b0 100644 (file)
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -508,7 +508,9 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
        int has_dashdash = 0;
        int output_prefix = 0;
        unsigned char sha1[20];
+       unsigned int flags = 0;
        const char *name = NULL;
+       struct object_context unused;
 
        if (argc > 1 && !strcmp("--parseopt", argv[1]))
                return cmd_parseopt(argc - 1, argv + 1, prefix);
@@ -596,6 +598,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                        }
                        if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
                                quiet = 1;
+                               flags |= GET_SHA1_QUIETLY;
                                continue;
                        }
                        if (!strcmp(arg, "--short") ||
@@ -818,7 +821,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                        name++;
                        type = REVERSED;
                }
-               if (!get_sha1(name, sha1)) {
+               if (!get_sha1_with_context(name, flags, sha1, &unused)) {
                        if (verify)
                                revs_count++;
                        else

diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 298c95e3f8b03e7f89d7767407ca8cee3eecc591..46498e111354bf0d86bb04f5207812e7f54259d8 100644 (file)
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -723,6 +723,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                char nth_desc[256];
                char *ref;
                int base = 0;
+               unsigned int flags = 0;
 
                if (ac == 0) {
                        static const char *fake_av[2];
@@ -749,7 +750,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                                /* Ah, that is a date spec... */
                                unsigned long at;
                                at = approxidate(reflog_base);
-                               read_ref_at(ref, at, -1, sha1, NULL,
+                               read_ref_at(ref, flags, at, -1, sha1, NULL,
                                            NULL, NULL, &base);
                        }
                }
@@ -760,7 +761,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
                        unsigned long timestamp;
                        int tz;
 
-                       if (read_ref_at(ref, 0, base+i, sha1, &logmsg,
+                       if (read_ref_at(ref, flags, 0, base+i, sha1, &logmsg,
                                        &timestamp, &tz, NULL)) {
                                reflog = i;
                                break;

diff --git a/refs.c b/refs.c
index 2ce5d690907d33bda557f66150ef1317f39b4f93..9e405f9e41ae52c413d4feb29521e30948a81ca8 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -3108,7 +3108,7 @@ static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1,
        return 1;
 }
 
-int read_ref_at(const char *refname, unsigned long at_time, int cnt,
+int read_ref_at(const char *refname, unsigned int flags, unsigned long at_time, int cnt,
                unsigned char *sha1, char **msg,
                unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
 {
@@ -3126,8 +3126,12 @@ int read_ref_at(const char *refname, unsigned long at_time, int cnt,
 
        for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb);
 
-       if (!cb.reccnt)
-               die("Log for %s is empty.", refname);
+       if (!cb.reccnt) {
+               if (flags & GET_SHA1_QUIETLY)
+                       exit(128);
+               else
+                       die("Log for %s is empty.", refname);
+       }
        if (cb.found_it)
                return 0;
 

diff --git a/refs.h b/refs.h
index 68c57701646f05a44dd0da95d981787653ae032d..0ca60599b1a321b2805df669a4f50a1c8e58cb19 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -206,7 +206,8 @@ extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, cons
 int log_ref_setup(const char *refname, char *logfile, int bufsize);
 
 /** Reads log for the value of ref during at_time. **/
-extern int read_ref_at(const char *refname, unsigned long at_time, int cnt,
+extern int read_ref_at(const char *refname, unsigned int flags,
+                      unsigned long at_time, int cnt,
                       unsigned char *sha1, char **msg,
                       unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt);
 

diff --git a/sha1_name.c b/sha1_name.c
index 7098b10e3db0caef02ae2daef8f0624e641aada4..5b004f513b999b31b7968b22dde955c859704853 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -432,7 +432,8 @@ static inline int upstream_mark(const char *string, int len)
 static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned lookup_flags);
 static int interpret_nth_prior_checkout(const char *name, int namelen, struct strbuf *buf);
 
-static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
+static int get_sha1_basic(const char *str, int len, unsigned char *sha1,
+                         unsigned int flags)
 {
        static const char *warn_msg = "refname '%.*s' is ambiguous.";
        static const char *object_name_msg = N_(
@@ -511,7 +512,7 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
        if (!refs_found)
                return -1;
 
-       if (warn_ambiguous_refs &&
+       if (warn_ambiguous_refs && !(flags & GET_SHA1_QUIETLY) &&
            (refs_found > 1 ||
             !get_short_sha1(str, len, tmp_sha1, GET_SHA1_QUIETLY)))
                warning(warn_msg, len, str);
@@ -545,7 +546,7 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                                return -1;
                        }
                }
-               if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
+               if (read_ref_at(real_ref, flags, at_time, nth, sha1, NULL,
                                &co_time, &co_tz, &co_cnt)) {
                        if (!len) {
                                if (starts_with(real_ref, "refs/heads/")) {
@@ -557,11 +558,16 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                                        len = 4;
                                }
                        }
-                       if (at_time)
-                               warning("Log for '%.*s' only goes "
-                                       "back to %s.", len, str,
-                                       show_date(co_time, co_tz, DATE_RFC2822));
-                       else {
+                       if (at_time) {
+                               if (!(flags & GET_SHA1_QUIETLY)) {
+                                       warning("Log for '%.*s' only goes "
+                                               "back to %s.", len, str,
+                                               show_date(co_time, co_tz, DATE_RFC2822));
+                               }
+                       } else {
+                               if (flags & GET_SHA1_QUIETLY) {
+                                       exit(128);
+                               }
                                die("Log for '%.*s' only has %d entries.",
                                    len, str, co_cnt);
                        }
@@ -801,7 +807,7 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned l
        if (!ret)
                return 0;
 
-       ret = get_sha1_basic(name, len, sha1);
+       ret = get_sha1_basic(name, len, sha1, lookup_flags);
        if (!ret)
                return 0;
 

diff --git a/t/t1503-rev-parse-verify.sh b/t/t1503-rev-parse-verify.sh
index d1f93b34054fde38e670d2dc9fbc050bb3d39234..823fe1d79924b68950a59ffde902b16db29205b6 100755 (executable)
--- a/t/t1503-rev-parse-verify.sh
+++ b/t/t1503-rev-parse-verify.sh
@@ -83,6 +83,33 @@ test_expect_success 'fails silently when using -q' '
        test_must_be_empty error
 '
 
+test_expect_success 'fails silently when using -q with deleted reflogs' '
+       ref=$(git rev-parse HEAD) &&
+       : >.git/logs/refs/test &&
+       git update-ref -m "message for refs/test" refs/test "$ref" &&
+       git reflog delete --updateref --rewrite refs/test@{0} &&
+       test_must_fail git rev-parse -q --verify refs/test@{0} >error 2>&1 &&
+       test_must_be_empty error
+'
+
+test_expect_success 'fails silently when using -q with not enough reflogs' '
+       ref=$(git rev-parse HEAD) &&
+       : >.git/logs/refs/test2 &&
+       git update-ref -m "message for refs/test2" refs/test2 "$ref" &&
+       test_must_fail git rev-parse -q --verify refs/test2@{999} >error 2>&1 &&
+       test_must_be_empty error
+'
+
+test_expect_success 'succeeds silently with -q and reflogs that do not go far back enough in time' '
+       ref=$(git rev-parse HEAD) &&
+       : >.git/logs/refs/test3 &&
+       git update-ref -m "message for refs/test3" refs/test3 "$ref" &&
+       git rev-parse -q --verify refs/test3@{1.year.ago} >actual 2>error &&
+       test_must_be_empty error &&
+       echo "$ref" >expect &&
+       test_cmp expect actual
+'
+
 test_expect_success 'no stdout output on error' '
        test -z "$(git rev-parse --verify)" &&
        test -z "$(git rev-parse --verify foo)" &&