--- /dev/null
+#include "cache.h"
+#include "refs.h"
+#include "commit.h"
+
+static void show_new(char *type, unsigned char *sha1_new)
+{
+ fprintf(stderr, " %s: %s\n", type,
+ find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
+}
+
+static int update_ref(const char *action,
+ const char *refname,
+ unsigned char *sha1,
+ unsigned char *oldval)
+{
+ int len;
+ char msg[1024];
+ char *rla = getenv("GIT_REFLOG_ACTION");
+ static struct ref_lock *lock;
+
+ if (!rla)
+ rla = "(reflog update)";
+ len = snprintf(msg, sizeof(msg), "%s: %s", rla, action);
+ if (sizeof(msg) <= len)
+ die("insanely long action");
+ lock = lock_any_ref_for_update(refname, oldval);
+ if (!lock)
+ return 1;
+ if (write_ref_sha1(lock, sha1, msg) < 0)
+ return 1;
+ return 0;
+}
+
+static int update_local_ref(const char *name,
+ const char *new_head,
+ const char *note,
+ int verbose, int force)
+{
+ char type[20];
+ unsigned char sha1_old[20], sha1_new[20];
+ char oldh[41], newh[41];
+ struct commit *current, *updated;
+
+ if (get_sha1_hex(new_head, sha1_new))
+ die("malformed object name %s", new_head);
+ if (sha1_object_info(sha1_new, type, NULL))
+ die("object %s not found", new_head);
+
+ if (!*name) {
+ /* Not storing */
+ if (verbose) {
+ fprintf(stderr, "* fetched %s\n", note);
+ show_new(type, sha1_new);
+ }
+ return 0;
+ }
+
+ if (get_sha1(name, sha1_old)) {
+ char *msg;
+ just_store:
+ /* new ref */
+ if (!strncmp(name, "refs/tags/", 10))
+ msg = "storing tag";
+ else
+ msg = "storing head";
+ fprintf(stderr, "* %s: storing %s\n",
+ name, note);
+ show_new(type, sha1_new);
+ return update_ref(msg, name, sha1_new, NULL);
+ }
+
+ if (!hashcmp(sha1_old, sha1_new)) {
+ if (verbose) {
+ fprintf(stderr, "* %s: same as %s\n", name, note);
+ show_new(type, sha1_new);
+ }
+ return 0;
+ }
+
+ if (!strncmp(name, "refs/tags/", 10)) {
+ fprintf(stderr, "* %s: updating with %s\n", name, note);
+ show_new(type, sha1_new);
+ return update_ref("updating tag", name, sha1_new, NULL);
+ }
+
+ current = lookup_commit_reference(sha1_old);
+ updated = lookup_commit_reference(sha1_new);
+ if (!current || !updated)
+ goto just_store;
+
+ strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcpy(newh, find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
+
+ if (in_merge_bases(current, &updated, 1)) {
+ fprintf(stderr, "* %s: fast forward to %s\n",
+ name, note);
+ fprintf(stderr, " old..new: %s..%s\n", oldh, newh);
+ return update_ref("fast forward", name, sha1_new, sha1_old);
+ }
+ if (!force) {
+ fprintf(stderr,
+ "* %s: not updating to non-fast forward %s\n",
+ name, note);
+ fprintf(stderr,
+ " old...new: %s...%s\n", oldh, newh);
+ return 1;
+ }
+ fprintf(stderr,
+ "* %s: forcing update to non-fast forward %s\n",
+ name, note);
+ fprintf(stderr, " old...new: %s...%s\n", oldh, newh);
+ return update_ref("forced-update", name, sha1_new, sha1_old);
+}
+
+static int append_fetch_head(FILE *fp,
+ const char *head, const char *remote,
+ const char *remote_name, const char *remote_nick,
+ const char *local_name, int not_for_merge,
+ int verbose, int force)
+{
+ struct commit *commit;
+ int remote_len, i, note_len;
+ unsigned char sha1[20];
+ char note[1024];
+ const char *what, *kind;
+
+ if (get_sha1(head, sha1))
+ return error("Not a valid object name: %s", head);
+ commit = lookup_commit_reference(sha1);
+ if (!commit)
+ not_for_merge = 1;
+
+ if (!strcmp(remote_name, "HEAD")) {
+ kind = "";
+ what = "";
+ }
+ else if (!strncmp(remote_name, "refs/heads/", 11)) {
+ kind = "branch";
+ what = remote_name + 11;
+ }
+ else if (!strncmp(remote_name, "refs/tags/", 10)) {
+ kind = "tag";
+ what = remote_name + 10;
+ }
+ else if (!strncmp(remote_name, "refs/remotes/", 13)) {
+ kind = "remote branch";
+ what = remote_name + 13;
+ }
+ else {
+ kind = "";
+ what = remote_name;
+ }
+
+ remote_len = strlen(remote);
+ for (i = remote_len - 1; remote[i] == '/' && 0 <= i; i--)
+ ;
+ remote_len = i + 1;
+ if (4 < i && !strncmp(".git", remote + i - 3, 4))
+ remote_len = i - 3;
+ note_len = sprintf(note, "%s\t%s\t",
+ sha1_to_hex(commit ? commit->object.sha1 : sha1),
+ not_for_merge ? "not-for-merge" : "");
+ if (*what) {
+ if (*kind)
+ note_len += sprintf(note + note_len, "%s ", kind);
+ note_len += sprintf(note + note_len, "'%s' of ", what);
+ }
+ note_len += sprintf(note + note_len, "%.*s", remote_len, remote);
+ fprintf(fp, "%s\n", note);
+ return update_local_ref(local_name, head, note, verbose, force);
+}
+
+int cmd_fetch__tool(int argc, const char **argv, const char *prefix)
+{
+ int verbose = 0;
+ int force = 0;
+
+ while (1 < argc) {
+ const char *arg = argv[1];
+ if (!strcmp("-v", arg))
+ verbose = 1;
+ else if (!strcmp("-f", arg))
+ force = 1;
+ else
+ break;
+ argc--;
+ argv++;
+ }
+
+ if (argc <= 1)
+ return error("Missing subcommand");
+
+ if (!strcmp("append-fetch-head", argv[1])) {
+ int result;
+ FILE *fp;
+
+ if (argc != 8)
+ return error("append-fetch-head takes 6 args");
+ fp = fopen(git_path("FETCH_HEAD"), "a");
+ result = append_fetch_head(fp, argv[2], argv[3],
+ argv[4], argv[5],
+ argv[6], !!argv[7][0],
+ verbose, force);
+ fclose(fp);
+ return result;
+ }
+ if (!strcmp("update-local-ref", argv[1])) {
+ if (argc != 5)
+ return error("update-local-ref takes 3 args");
+ return update_local_ref(argv[2], argv[3], argv[4],
+ verbose, force);
+ }
+ return error("Unknown subcommand: %s", argv[1]);
+}
die "Cannot get the repository state from $remote"
append_fetch_head () {
- head_="$1"
- remote_="$2"
- remote_name_="$3"
- remote_nick_="$4"
- local_name_="$5"
- case "$6" in
- t) not_for_merge_='not-for-merge' ;;
- '') not_for_merge_= ;;
- esac
-
- # remote-nick is the URL given on the command line (or a shorthand)
- # remote-name is the $GIT_DIR relative refs/ path we computed
- # for this refspec.
-
- # the $note_ variable will be fed to git-fmt-merge-msg for further
- # processing.
- case "$remote_name_" in
- HEAD)
- note_= ;;
- refs/heads/*)
- note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
- note_="branch '$note_' of " ;;
- refs/tags/*)
- note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
- note_="tag '$note_' of " ;;
- refs/remotes/*)
- note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
- note_="remote branch '$note_' of " ;;
- *)
- note_="$remote_name of " ;;
- esac
- remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
- remote_="$remote_1_"
- note_="$note_$remote_"
-
- # 2.6.11-tree tag would not be happy to be fed to resolve.
- if git-cat-file commit "$head_" >/dev/null 2>&1
- then
- headc_=$(git-rev-parse --verify "$head_^0") || exit
- echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
- else
- echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
- fi
-
- update_local_ref "$local_name_" "$head_" "$note_"
+ flags=
+ test -n "$verbose" && flags="$flags -v"
+ test -n "$force" && flags="$flags -f"
+ GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
+ git-fetch--tool append-fetch-head $flags "$@"
}
update_local_ref () {
- # If we are storing the head locally make sure that it is
- # a fast forward (aka "reverse push").
-
- label_=$(git-cat-file -t $2)
- newshort_=$(git-rev-parse --short $2)
- if test -z "$1" ; then
- [ "$verbose" ] && echo >&2 "* fetched $3"
- [ "$verbose" ] && echo >&2 " $label_: $newshort_"
- return 0
- fi
- oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
-
- case "$1" in
- refs/tags/*)
- # Tags need not be pointing at commits so there
- # is no way to guarantee "fast-forward" anyway.
- if test -n "$oldshort_"
- then
- if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
- then
- [ "$verbose" ] && echo >&2 "* $1: same as $3"
- [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
- else
- echo >&2 "* $1: updating with $3"
- echo >&2 " $label_: $newshort_"
- git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
- fi
- else
- echo >&2 "* $1: storing $3"
- echo >&2 " $label_: $newshort_"
- git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
- fi
- ;;
-
- refs/heads/* | refs/remotes/*)
- # $1 is the ref being updated.
- # $2 is the new value for the ref.
- local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
- if test "$local"
- then
- # Require fast-forward.
- mb=$(git-merge-base "$local" "$2") &&
- case "$2,$mb" in
- $local,*)
- if test -n "$verbose"
- then
- echo >&2 "* $1: same as $3"
- echo >&2 " $label_: $newshort_"
- fi
- ;;
- *,$local)
- echo >&2 "* $1: fast forward to $3"
- echo >&2 " old..new: $oldshort_..$newshort_"
- git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
- ;;
- *)
- false
- ;;
- esac || {
- case ",$force,$single_force," in
- *,t,*)
- echo >&2 "* $1: forcing update to non-fast forward $3"
- echo >&2 " old...new: $oldshort_...$newshort_"
- git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
- ;;
- *)
- echo >&2 "* $1: not updating to non-fast forward $3"
- echo >&2 " old...new: $oldshort_...$newshort_"
- exit 1
- ;;
- esac
- }
- else
- echo >&2 "* $1: storing $3"
- echo >&2 " $label_: $newshort_"
- git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
- fi
- ;;
- esac
+ flags=
+ test -n "$verbose" && flags="$flags -v"
+ test -n "$force" && flags="$flags -f"
+ GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
+ git-fetch--tool update-local-ref $flags "$@"
}
# updating the current HEAD with git-fetch in a bare