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Diffstat (limited to 'builtin/fast-export.c')
-rw-r--r--builtin/fast-export.c194
1 files changed, 139 insertions, 55 deletions
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 9bd8a14..9e28348 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -31,13 +31,16 @@ static const char *fast_export_usage[] = {
};
static int progress;
-static enum { ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = ABORT;
-static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ERROR;
+static enum { SIGNED_TAG_ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = SIGNED_TAG_ABORT;
+static enum { TAG_FILTERING_ABORT, DROP, REWRITE } tag_of_filtered_mode = TAG_FILTERING_ABORT;
static int fake_missing_tagger;
static int use_done_feature;
static int no_data;
static int full_tree;
+static int reference_excluded_commits;
+static int show_original_ids;
static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
+static struct string_list tag_refs = STRING_LIST_INIT_NODUP;
static struct refspec refspecs = REFSPEC_INIT_FETCH;
static int anonymize;
static struct revision_sources revision_sources;
@@ -46,7 +49,7 @@ static int parse_opt_signed_tag_mode(const struct option *opt,
const char *arg, int unset)
{
if (unset || !strcmp(arg, "abort"))
- signed_tag_mode = ABORT;
+ signed_tag_mode = SIGNED_TAG_ABORT;
else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
signed_tag_mode = VERBATIM;
else if (!strcmp(arg, "warn"))
@@ -64,7 +67,7 @@ static int parse_opt_tag_of_filtered_mode(const struct option *opt,
const char *arg, int unset)
{
if (unset || !strcmp(arg, "abort"))
- tag_of_filtered_mode = ERROR;
+ tag_of_filtered_mode = TAG_FILTERING_ABORT;
else if (!strcmp(arg, "drop"))
tag_of_filtered_mode = DROP;
else if (!strcmp(arg, "rewrite"))
@@ -187,6 +190,22 @@ static int get_object_mark(struct object *object)
return ptr_to_mark(decoration);
}
+static struct commit *rewrite_commit(struct commit *p)
+{
+ for (;;) {
+ if (p->parents && p->parents->next)
+ break;
+ if (p->object.flags & UNINTERESTING)
+ break;
+ if (!(p->object.flags & TREESAME))
+ break;
+ if (!p->parents)
+ return NULL;
+ p = p->parents->item;
+ }
+ return p;
+}
+
static void show_progress(void)
{
static int counter = 0;
@@ -243,7 +262,7 @@ static void export_blob(const struct object_id *oid)
if (!buf)
die("could not read blob %s", oid_to_hex(oid));
if (check_object_signature(oid, buf, size, type_name(type)) < 0)
- die("sha1 mismatch in blob %s", oid_to_hex(oid));
+ die("oid mismatch in blob %s", oid_to_hex(oid));
object = parse_object_buffer(the_repository, oid, type,
size, buf, &eaten);
}
@@ -253,7 +272,10 @@ static void export_blob(const struct object_id *oid)
mark_next_object(object);
- printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
+ printf("blob\nmark :%"PRIu32"\n", last_idnum);
+ if (show_original_ids)
+ printf("original-oid %s\n", oid_to_hex(oid));
+ printf("data %"PRIuMAX"\n", (uintmax_t)size);
if (size && fwrite(buf, size, 1, stdout) != 1)
die_errno("could not write blob '%s'", oid_to_hex(oid));
printf("\n");
@@ -330,17 +352,18 @@ static void print_path(const char *path)
static void *generate_fake_oid(const void *old, size_t *len)
{
- static uint32_t counter = 1; /* avoid null sha1 */
- unsigned char *out = xcalloc(GIT_SHA1_RAWSZ, 1);
- put_be32(out + GIT_SHA1_RAWSZ - 4, counter++);
+ static uint32_t counter = 1; /* avoid null oid */
+ const unsigned hashsz = the_hash_algo->rawsz;
+ unsigned char *out = xcalloc(hashsz, 1);
+ put_be32(out + hashsz - 4, counter++);
return out;
}
-static const unsigned char *anonymize_sha1(const struct object_id *oid)
+static const struct object_id *anonymize_oid(const struct object_id *oid)
{
- static struct hashmap sha1s;
- size_t len = GIT_SHA1_RAWSZ;
- return anonymize_mem(&sha1s, generate_fake_oid, oid, &len);
+ static struct hashmap objs;
+ size_t len = the_hash_algo->rawsz;
+ return anonymize_mem(&objs, generate_fake_oid, oid, &len);
}
static void show_filemodify(struct diff_queue_struct *q,
@@ -384,7 +407,7 @@ static void show_filemodify(struct diff_queue_struct *q,
string_list_insert(changed, spec->path);
putchar('\n');
- if (!oidcmp(&ospec->oid, &spec->oid) &&
+ if (oideq(&ospec->oid, &spec->oid) &&
ospec->mode == spec->mode)
break;
}
@@ -399,9 +422,9 @@ static void show_filemodify(struct diff_queue_struct *q,
*/
if (no_data || S_ISGITLINK(spec->mode))
printf("M %06o %s ", spec->mode,
- sha1_to_hex(anonymize ?
- anonymize_sha1(&spec->oid) :
- spec->oid.hash));
+ oid_to_hex(anonymize ?
+ anonymize_oid(&spec->oid) :
+ &spec->oid));
else {
struct object *object = lookup_object(the_repository,
spec->oid.hash);
@@ -579,7 +602,8 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
message += 2;
if (commit->parents &&
- get_object_mark(&commit->parents->item->object) != 0 &&
+ (get_object_mark(&commit->parents->item->object) != 0 ||
+ reference_excluded_commits) &&
!full_tree) {
parse_commit_or_die(commit->parents->item);
diff_tree_oid(get_commit_tree_oid(commit->parents->item),
@@ -595,6 +619,13 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
export_blob(&diff_queued_diff.queue[i]->two->oid);
refname = *revision_sources_at(&revision_sources, commit);
+ /*
+ * FIXME: string_list_remove() below for each ref is overall
+ * O(N^2). Compared to a history walk and diffing trees, this is
+ * just lost in the noise in practice. However, theoretically a
+ * repo may have enough refs for this to become slow.
+ */
+ string_list_remove(&extra_refs, refname, 0);
if (anonymize) {
refname = anonymize_refname(refname);
anonymize_ident_line(&committer, &committer_end);
@@ -608,8 +639,10 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
reencoded = reencode_string(message, "UTF-8", encoding);
if (!commit->parents)
printf("reset %s\n", refname);
- printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
- refname, last_idnum,
+ printf("commit %s\nmark :%"PRIu32"\n", refname, last_idnum);
+ if (show_original_ids)
+ printf("original-oid %s\n", oid_to_hex(&commit->object.oid));
+ printf("%.*s\n%.*s\ndata %u\n%s",
(int)(author_end - author), author,
(int)(committer_end - committer), committer,
(unsigned)(reencoded
@@ -620,13 +653,21 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
unuse_commit_buffer(commit, commit_buffer);
for (i = 0, p = commit->parents; p; p = p->next) {
- int mark = get_object_mark(&p->item->object);
- if (!mark)
+ struct object *obj = &p->item->object;
+ int mark = get_object_mark(obj);
+
+ if (!mark && !reference_excluded_commits)
continue;
if (i == 0)
- printf("from :%d\n", mark);
+ printf("from ");
+ else
+ printf("merge ");
+ if (mark)
+ printf(":%d\n", mark);
else
- printf("merge :%d\n", mark);
+ printf("%s\n", oid_to_hex(anonymize ?
+ anonymize_oid(&obj->oid) :
+ &obj->oid));
i++;
}
@@ -727,7 +768,7 @@ static void handle_tag(const char *name, struct tag *tag)
"\n-----BEGIN PGP SIGNATURE-----\n");
if (signature)
switch(signed_tag_mode) {
- case ABORT:
+ case SIGNED_TAG_ABORT:
die("encountered signed tag %s; use "
"--signed-tags=<mode> to handle it",
oid_to_hex(&tag->object.oid));
@@ -752,7 +793,7 @@ static void handle_tag(const char *name, struct tag *tag)
tagged_mark = get_object_mark(tagged);
if (!tagged_mark) {
switch(tag_of_filtered_mode) {
- case ABORT:
+ case TAG_FILTERING_ABORT:
die("tag %s tags unexported object; use "
"--tag-of-filtered-object=<mode> to handle it",
oid_to_hex(&tag->object.oid));
@@ -766,18 +807,12 @@ static void handle_tag(const char *name, struct tag *tag)
oid_to_hex(&tag->object.oid),
type_name(tagged->type));
}
- p = (struct commit *)tagged;
- for (;;) {
- if (p->parents && p->parents->next)
- break;
- if (p->object.flags & UNINTERESTING)
- break;
- if (!(p->object.flags & TREESAME))
- break;
- if (!p->parents)
- die("can't find replacement commit for tag %s",
- oid_to_hex(&tag->object.oid));
- p = p->parents->item;
+ p = rewrite_commit((struct commit *)tagged);
+ if (!p) {
+ printf("reset %s\nfrom %s\n\n",
+ name, oid_to_hex(&null_oid));
+ free(buf);
+ return;
}
tagged_mark = get_object_mark(&p->object);
}
@@ -785,8 +820,10 @@ static void handle_tag(const char *name, struct tag *tag)
if (starts_with(name, "refs/tags/"))
name += 10;
- printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
- name, tagged_mark,
+ printf("tag %s\nfrom :%d\n", name, tagged_mark);
+ if (show_original_ids)
+ printf("original-oid %s\n", oid_to_hex(&tag->object.oid));
+ printf("%.*s%sdata %d\n%.*s\n",
(int)(tagger_end - tagger), tagger,
tagger == tagger_end ? "" : "\n",
(int)message_size, (int)message_size, message ? message : "");
@@ -804,7 +841,7 @@ static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name)
/* handle nested tags */
while (tag && tag->object.type == OBJ_TAG) {
parse_object(the_repository, &tag->object.oid);
- string_list_append(&extra_refs, full_name)->util = tag;
+ string_list_append(&tag_refs, full_name)->util = tag;
tag = (struct tag *)tag->tagged;
}
if (!tag)
@@ -863,25 +900,30 @@ static void get_tags_and_duplicates(struct rev_cmdline_info *info)
}
/*
- * This ref will not be updated through a commit, lets make
- * sure it gets properly updated eventually.
+ * Make sure this ref gets properly updated eventually, whether
+ * through a commit or manually at the end.
*/
- if (*revision_sources_at(&revision_sources, commit) ||
- commit->object.flags & SHOWN)
+ if (e->item->type != OBJ_TAG)
string_list_append(&extra_refs, full_name)->util = commit;
+
if (!*revision_sources_at(&revision_sources, commit))
*revision_sources_at(&revision_sources, commit) = full_name;
}
+
+ string_list_sort(&extra_refs);
+ string_list_remove_duplicates(&extra_refs, 0);
}
-static void handle_tags_and_duplicates(void)
+static void handle_tags_and_duplicates(struct string_list *extras)
{
struct commit *commit;
int i;
- for (i = extra_refs.nr - 1; i >= 0; i--) {
- const char *name = extra_refs.items[i].string;
- struct object *object = extra_refs.items[i].util;
+ for (i = extras->nr - 1; i >= 0; i--) {
+ const char *name = extras->items[i].string;
+ struct object *object = extras->items[i].util;
+ int mark;
+
switch (object->type) {
case OBJ_TAG:
handle_tag(name, (struct tag *)object);
@@ -890,9 +932,45 @@ static void handle_tags_and_duplicates(void)
if (anonymize)
name = anonymize_refname(name);
/* create refs pointing to already seen commits */
- commit = (struct commit *)object;
- printf("reset %s\nfrom :%d\n\n", name,
- get_object_mark(&commit->object));
+ commit = rewrite_commit((struct commit *)object);
+ if (!commit) {
+ /*
+ * Neither this object nor any of its
+ * ancestors touch any relevant paths, so
+ * it has been filtered to nothing. Delete
+ * it.
+ */
+ printf("reset %s\nfrom %s\n\n",
+ name, oid_to_hex(&null_oid));
+ continue;
+ }
+
+ mark = get_object_mark(&commit->object);
+ if (!mark) {
+ /*
+ * Getting here means we have a commit which
+ * was excluded by a negative refspec (e.g.
+ * fast-export ^master master). If we are
+ * referencing excluded commits, set the ref
+ * to the exact commit. Otherwise, the user
+ * wants the branch exported but every commit
+ * in its history to be deleted, which basically
+ * just means deletion of the ref.
+ */
+ if (!reference_excluded_commits) {
+ /* delete the ref */
+ printf("reset %s\nfrom %s\n\n",
+ name, oid_to_hex(&null_oid));
+ continue;
+ }
+ /* set ref to commit using oid, not mark */
+ printf("reset %s\nfrom %s\n\n", name,
+ oid_to_hex(&commit->object.oid));
+ continue;
+ }
+
+ printf("reset %s\nfrom :%d\n\n", name, mark
+ );
show_progress();
break;
}
@@ -988,7 +1066,7 @@ static void handle_deletes(void)
continue;
printf("reset %s\nfrom %s\n\n",
- refspec->dst, sha1_to_hex(null_sha1));
+ refspec->dst, oid_to_hex(&null_oid));
}
}
@@ -1024,6 +1102,11 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
OPT_STRING_LIST(0, "refspec", &refspecs_list, N_("refspec"),
N_("Apply refspec to exported refs")),
OPT_BOOL(0, "anonymize", &anonymize, N_("anonymize output")),
+ OPT_BOOL(0, "reference-excluded-parents",
+ &reference_excluded_commits, N_("Reference parents which are not in fast-export stream by object id")),
+ OPT_BOOL(0, "show-original-ids", &show_original_ids,
+ N_("Show original object ids of blobs/commits")),
+
OPT_END()
};
@@ -1033,7 +1116,7 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
/* we handle encodings */
git_config(git_default_config, NULL);
- init_revisions(&revs, prefix);
+ repo_init_revisions(the_repository, &revs, prefix);
init_revision_sources(&revision_sources);
revs.topo_order = 1;
revs.sources = &revision_sources;
@@ -1080,7 +1163,8 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
}
}
- handle_tags_and_duplicates();
+ handle_tags_and_duplicates(&extra_refs);
+ handle_tags_and_duplicates(&tag_refs);
handle_deletes();
if (export_filename && lastimportid != last_idnum)