Suppose you are managing many maintenance tracks in your project,
and some of the more recent ones are maint-2.36 and maint-2.37.
Further imagine that your project recently tagged the official 2.38
release, which means you would need to start maint-2.38 track soon,
by doing:
$ git checkout -b maint-2.38 v2.38.0^0
$ git branch --list 'maint-2.3[6-9]'
* maint-2.38
maint-2.36
maint-2.37
So far, so good. But it also is reasonable to want not to have to
worry about which maintenance track is the latest, by pointing a
more generic-sounding 'maint' branch at it, by doing:
$ git symbolic-ref refs/heads/maint refs/heads/maint-2.38
which would allow you to say "whichever it is, check out the latest
maintenance track", by doing:
$ git checkout maint
$ git branch --show-current
maint-2.38
It is arguably better to say that we are on 'maint-2.38' rather than
on 'maint', and "git merge/pull" would record "into maint-2.38" and
not "into maint", so I think what we have is a good behaviour.
One thing that is slightly irritating, however, is that I do not
think there is a good way (other than "cat .git/HEAD") to learn that
you checked out 'maint' to get into that state. Just like the output
of "git branch --show-current" shows above, "git symbolic-ref HEAD"
would report 'refs/heads/maint-2.38', bypassing the intermediate
symbolic ref at 'refs/heads/maint' that is pointed at by HEAD.
The internal resolve_ref() API already has the necessary support for
stopping after resolving a single level of a symbolic-ref, and we
can expose it by adding a "--[no-]recurse" option to the command.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin/symbolic-ref.c | 16 ++++++++++------
t/t1401-symbolic-ref.sh | 14 ++++++++++++++
2 files changed, 24 insertions(+), 6 deletions(-)
diff --git c/builtin/symbolic-ref.c w/builtin/symbolic-ref.c
index 1b0f10225f..5c9de63267 100644
--- c/builtin/symbolic-ref.c
+++ w/builtin/symbolic-ref.c
@@ -10,10 +10,13 @@ static const char * const git_symbolic_ref_usage[] = {
NULL
};
-static int check_symref(const char *HEAD, int quiet, int shorten, int print)
+static int check_symref(const char *HEAD, int quiet, int shorten, int recurse, int print)
{
- int flag;
- const char *refname = resolve_ref_unsafe(HEAD, 0, NULL, &flag);
+ int resolve_flags, flag;
+ const char *refname;
+
+ resolve_flags = (recurse ? 0 : RESOLVE_REF_NO_RECURSE);
+ refname = resolve_ref_unsafe(HEAD, resolve_flags, NULL, &flag);
if (!refname)
die("No such ref: %s", HEAD);
@@ -35,13 +38,14 @@ static int check_symref(const char *HEAD, int quiet, int shorten, int print)
int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
{
- int quiet = 0, delete = 0, shorten = 0, ret = 0;
+ int quiet = 0, delete = 0, shorten = 0, recurse = 1, ret = 0;
const char *msg = NULL;
struct option options[] = {
OPT__QUIET(&quiet,
N_("suppress error message for non-symbolic (detached) refs")),
OPT_BOOL('d', "delete", &delete, N_("delete symbolic ref")),
OPT_BOOL(0, "short", &shorten, N_("shorten ref output")),
+ OPT_BOOL(0, "recurse", &recurse, N_("recursively dereference (default)")),
OPT_STRING('m', NULL, &msg, N_("reason"), N_("reason of the update")),
OPT_END(),
};
@@ -55,7 +59,7 @@ int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
if (delete) {
if (argc != 1)
usage_with_options(git_symbolic_ref_usage, options);
- ret = check_symref(argv[0], 1, 0, 0);
+ ret = check_symref(argv[0], 1, 0, 0, 0);
if (ret)
die("Cannot delete %s, not a symbolic ref", argv[0]);
if (!strcmp(argv[0], "HEAD"))
@@ -65,7 +69,7 @@ int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
switch (argc) {
case 1:
- ret = check_symref(argv[0], quiet, shorten, 1);
+ ret = check_symref(argv[0], quiet, shorten, recurse, 1);
break;
case 2:
if (!strcmp(argv[0], "HEAD") &&
diff --git c/t/t1401-symbolic-ref.sh w/t/t1401-symbolic-ref.sh
index 0c204089b8..d708acdb81 100755
--- c/t/t1401-symbolic-ref.sh
+++ w/t/t1401-symbolic-ref.sh
@@ -175,4 +175,18 @@ test_expect_success 'symbolic-ref allows top-level target for non-HEAD' '
test_cmp_rev top-level HEAD
'
+test_expect_success 'symbolic-ref pointing at another' '
+ git update-ref refs/heads/maint-2.37 HEAD &&
+ git symbolic-ref refs/heads/maint refs/heads/maint-2.37 &&
+ git checkout maint &&
+
+ git symbolic-ref HEAD >actual &&
+ echo refs/heads/maint-2.37 >expect &&
+ test_cmp expect actual &&
+
+ git symbolic-ref --no-recurse HEAD >actual &&
+ echo refs/heads/maint >expect &&
+ test_cmp expect actual
+'
+
test_done
