[PATCH 4/6] remote prune: warn dangling symrefs
If you prune from the remote "frotz" that deleted the ref your tracking branch remotes/frotz/HEAD points at, the symbolic ref will become dangling. We used to detect this as an error condition and issued a message every time refs are enumerated.
This stops the error message, but moves the warning to "remote prune".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin-remote.c | 6 ++++
refs.c | 72 ++++++++++++++++++++++++++++++++++++++++-------------
refs.h | 5 +++
3 files changed, 65 insertions(+), 18 deletions(-)
diff --git a/builtin-remote.c b/builtin-remote.c
index db18bcf..ac69d37 100644
--- a/builtin-remote.c
+++ b/builtin-remote.c
@@ -756,12 +756,17 @@ static int prune(int argc, const char **argv)
OPT_END()
};
struct ref_states states;
+ const char *dangling_msg;
argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
if (argc < 1)
usage_with_options(builtin_remote_usage, options);
+ dangling_msg = (dry_run
+ ? " %s will become dangling!\n"
+ : " %s has become dangling!\n");
+
memset(&states, 0, sizeof(states));
for (; argc; argc--, argv++) {
int i;
@@ -784,6 +789,7 @@ static int prune(int argc, const char **argv)
printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
abbrev_ref(refname, "refs/remotes/"));
+ warn_dangling_symref(dangling_msg, refname);
}
/* NEEDSWORK: free remote */
diff --git a/refs.c b/refs.c
index 024211d..6eb5f53 100644
--- a/refs.c
+++ b/refs.c
@@ -275,10 +275,8 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
list = get_ref_dir(ref, list);
continue;
}
- if (!resolve_ref(ref, sha1, 1, &flag)) {
- error("%s points nowhere!", ref);
- continue;
- }
+ if (!resolve_ref(ref, sha1, 1, &flag))
+ hashclr(sha1);
list = add_ref(ref, sha1, flag, list, NULL);
}
free(ref);
@@ -287,6 +285,35 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
return sort_ref_list(list);
}
+struct warn_if_dangling_data {
+ const char *refname;
+ const char *msg_fmt;
+};
+
+static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data)
+{
+ struct warn_if_dangling_data *d = cb_data;
+ const char *resolves_to;
+ unsigned char junk[20];
+
+ if (!(flags & REF_ISSYMREF))
+ return 0;
+
+ resolves_to = resolve_ref(refname, junk, 0, NULL);
+ if (!resolves_to || strcmp(resolves_to, d->refname))
+ return 0;
+
+ printf(d->msg_fmt, refname);
+ return 0;
+}
+
+void warn_dangling_symref(const char *msg_fmt, const char *refname)
+{
+ struct warn_if_dangling_data data = { refname, msg_fmt };
+ for_each_rawref(warn_if_dangling_symref, &data);
+}
+
static struct ref_list *get_loose_refs(void)
{
if (!cached_refs.did_loose) {
@@ -498,16 +525,19 @@ int read_ref(const char *ref, unsigned char *sha1)
return -1;
}
+#define DO_FOR_EACH_INCLUDE_BROKEN 01
static int do_one_ref(const char *base, each_ref_fn fn, int trim,
- void *cb_data, struct ref_list *entry)
+ int flags, void *cb_data, struct ref_list *entry)
{
if (strncmp(base, entry->name, trim))
return 0;
- if (is_null_sha1(entry->sha1))
- return 0;
- if (!has_sha1_file(entry->sha1)) {
- error("%s does not point to a valid object!", entry->name);
- return 0;
+ if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
+ if (is_null_sha1(entry->sha1))
+ return 0;
+ if (!has_sha1_file(entry->sha1)) {
+ error("%s does not point to a valid object!", entry->name);
+ return 0;
+ }
}
current_ref = entry;
return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
@@ -561,7 +591,7 @@ fallback:
}
static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
- void *cb_data)
+ int flags, void *cb_data)
{
int retval = 0;
struct ref_list *packed = get_packed_refs();
@@ -570,7 +600,7 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
struct ref_list *extra;
for (extra = extra_refs; extra; extra = extra->next)
- retval = do_one_ref(base, fn, trim, cb_data, extra);
+ retval = do_one_ref(base, fn, trim, flags, cb_data, extra);
while (packed && loose) {
struct ref_list *entry;
@@ -586,13 +616,13 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
entry = packed;
packed = packed->next;
}
- retval = do_one_ref(base, fn, trim, cb_data, entry);
+ retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
if (retval)
goto end_each;
}
for (packed = packed ? packed : loose; packed; packed = packed->next) {
- retval = do_one_ref(base, fn, trim, cb_data, packed);
+ retval = do_one_ref(base, fn, trim, flags, cb_data, packed);
if (retval)
goto end_each;
}
@@ -614,22 +644,28 @@ int head_ref(each_ref_fn fn, void *cb_data)
int for_each_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/", fn, 0, cb_data);
+ return do_for_each_ref("refs/", fn, 0, 0, cb_data);
}
int for_each_tag_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/tags/", fn, 10, cb_data);
+ return do_for_each_ref("refs/tags/", fn, 10, 0, cb_data);
}
int for_each_branch_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/heads/", fn, 11, cb_data);
+ return do_for_each_ref("refs/heads/", fn, 11, 0, cb_data);
}
int for_each_remote_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/remotes/", fn, 13, cb_data);
+ return do_for_each_ref("refs/remotes/", fn, 13, 0, cb_data);
+}
+
+int for_each_rawref(each_ref_fn fn, void *cb_data)
+{
+ return do_for_each_ref("refs/", fn, 0,
+ DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
/*
diff --git a/refs.h b/refs.h
index 3bb529d..29bdcec 100644
--- a/refs.h
+++ b/refs.h
@@ -24,6 +24,11 @@ extern int for_each_tag_ref(each_ref_fn, void *);
extern int for_each_branch_ref(each_ref_fn, void *);
extern int for_each_remote_ref(each_ref_fn, void *);
+/* can be used to learn about broken ref and symref */
+extern int for_each_rawref(each_ref_fn, void *);
+
+extern void warn_dangling_symref(const char *msg_fmt, const char *refname);
+
/*
* Extra refs will be listed by for_each_ref() before any actual refs
* for the duration of this process or until clear_extra_refs() is
--
1.6.2.rc0.28.g2593d
Jan Krüger
