Re: q: faster way to integrate/merge lots of topic branches?
Ingo Molnar <mingo@elte.hu> writes:
Show 6 quoted lines
> * SZEDER Gábor <szeder@ira.uka.de> wrote:
>
>> you cound use 'git branch --no-merged' to list only those branches
>> that have not been merged into your current HEAD.
>
> hm, it's very slow:
Yeah, --no-merged and --merged were done in a quite naïve way.
The patch needs to be cleaned up by splitting it into multiple steps:
(1) discard everything outside refs/heads and refs/remotes in append_ref();
why do we even have code to deal with refs/tags to begin with??? (2) change ref_item->sha1 to ref_item->commit (and make has_commit() take
struct commit); (3) teach merge_filter code not to do has_commit() for each ref, but use
revision traversal machinery to compute everything in parallel and in
one traversal.but other than that, this seems to pass the tests, and is obviously correct ;-)
With an artificial repository that has "master" and 1000 test-$i branches where they were created by "git branch test-$i master~$i":
(with patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.12user 0.02system 0:00.15elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1588minor)pagefaults 0swaps
$ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.15user 0.03system 0:00.18elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1711minor)pagefaults 0swaps
(without patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.69user 0.03system 0:00.72elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2229minor)pagefaults 0swaps
$ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.58user 0.03system 0:00.61elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2248minor)pagefaults 0swaps
---
builtin-branch.c | 68 ++++++++++++++++++++++++++++++++---------------------
1 files changed, 41 insertions(+), 27 deletions(-)
diff --git a/builtin-branch.c b/builtin-branch.c
index b885bd1..788e70a 100644
--- a/builtin-branch.c
+++ b/builtin-branch.c
@@ -13,6 +13,8 @@
#include "remote.h"
#include "parse-options.h"
#include "branch.h"
+#include "diff.h"
+#include "revision.h"
static const char * const builtin_branch_usage[] = {
"git branch [options] [-r | -a] [--merged | --no-merged]",
@@ -181,25 +183,21 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
struct ref_item {
char *name;
unsigned int kind;
- unsigned char sha1[20];
+ struct commit *commit;
};
struct ref_list {
+ struct rev_info revs;
int index, alloc, maxwidth;
struct ref_item *list;
struct commit_list *with_commit;
int kinds;
};
-static int has_commit(const unsigned char *sha1, struct commit_list *with_commit)
+static int has_commit(struct commit *commit, struct commit_list *with_commit)
{
- struct commit *commit;
-
if (!with_commit)
return 1;
- commit = lookup_commit_reference_gently(sha1, 1);
- if (!commit)
- return 0;
while (with_commit) {
struct commit *other;
@@ -215,6 +213,7 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
{
struct ref_list *ref_list = (struct ref_list*)(cb_data);
struct ref_item *newitem;
+ struct commit *commit;
int kind = REF_UNKNOWN_TYPE;
int len;
static struct commit_list branch;
@@ -226,13 +225,15 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
} else if (!prefixcmp(refname, "refs/remotes/")) {
kind = REF_REMOTE_BRANCH;
refname += 13;
- } else if (!prefixcmp(refname, "refs/tags/")) {
- kind = REF_TAG;
- refname += 10;
- }
+ } else
+ return 0;
+
+ commit = lookup_commit_reference_gently(sha1, 1);
+ if (!commit)
+ return error("branch '%s' does not point at a commit", refname);
/* Filter with with_commit if specified */
- if (!has_commit(sha1, ref_list->with_commit))
+ if (!has_commit(commit, ref_list->with_commit))
return 0;
/* Don't add types the caller doesn't want */
@@ -243,30 +244,25 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
branch.item = lookup_commit_reference_gently(sha1, 1);
if (!branch.item)
die("Unable to lookup tip of branch %s", refname);
- if (merge_filter == SHOW_NOT_MERGED &&
- has_commit(merge_filter_ref, &branch))
- return 0;
- if (merge_filter == SHOW_MERGED &&
- !has_commit(merge_filter_ref, &branch))
- return 0;
+ add_pending_object(&ref_list->revs,
+ (struct object *)branch.item, refname);
}
/* Resize buffer */
if (ref_list->index >= ref_list->alloc) {
ref_list->alloc = alloc_nr(ref_list->alloc);
ref_list->list = xrealloc(ref_list->list,
- ref_list->alloc * sizeof(struct ref_item));
+ ref_list->alloc * sizeof(struct ref_item));
}
/* Record the new item */
newitem = &(ref_list->list[ref_list->index++]);
newitem->name = xstrdup(refname);
newitem->kind = kind;
- hashcpy(newitem->sha1, sha1);
+ newitem->commit = commit;
len = strlen(newitem->name);
if (len > ref_list->maxwidth)
ref_list->maxwidth = len;
-
return 0;
}
@@ -309,7 +305,13 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
{
char c;
int color;
- struct commit *commit;
+ struct commit *commit = item->commit;
+
+ if (merge_filter != NO_FILTER) {
+ int is_merged = !!(item->commit->object.flags & UNINTERESTING);
+ if (is_merged != (merge_filter == SHOW_MERGED))
+ return;
+ }
switch (item->kind) {
case REF_LOCAL_BRANCH:
@@ -337,7 +339,7 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
strbuf_init(&subject, 0);
stat[0] = '\0';
- commit = lookup_commit(item->sha1);
+ commit = item->commit;
if (commit && !parse_commit(commit)) {
pretty_print_commit(CMIT_FMT_ONELINE, commit,
&subject, 0, NULL, NULL, 0, 0);
@@ -350,7 +352,7 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
maxwidth, item->name,
branch_get_color(COLOR_BRANCH_RESET),
- find_unique_abbrev(item->sha1, abbrev),
+ find_unique_abbrev(item->commit->object.sha1, abbrev),
stat, sub);
strbuf_release(&subject);
} else {
@@ -363,22 +365,34 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev, str
{
int i;
struct ref_list ref_list;
+ struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
memset(&ref_list, 0, sizeof(ref_list));
ref_list.kinds = kinds;
ref_list.with_commit = with_commit;
+ if (merge_filter != NO_FILTER)
+ init_revisions(&ref_list.revs, NULL);
for_each_ref(append_ref, &ref_list);
+ if (merge_filter != NO_FILTER) {
+ struct commit *filter;
+ filter = lookup_commit_reference_gently(merge_filter_ref, 0);
+ filter->object.flags |= UNINTERESTING;
+ add_pending_object(&ref_list.revs,
+ (struct object *) filter, "");
+ ref_list.revs.limited = 1;
+ prepare_revision_walk(&ref_list.revs);
+ }
qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
detached = (detached && (kinds & REF_LOCAL_BRANCH));
- if (detached && has_commit(head_sha1, with_commit)) {
+ if (detached && head_commit && has_commit(head_commit, with_commit)) {
struct ref_item item;
item.name = xstrdup("(no branch)");
item.kind = REF_LOCAL_BRANCH;
- hashcpy(item.sha1, head_sha1);
+ item.commit = head_commit;
if (strlen(item.name) > ref_list.maxwidth)
- ref_list.maxwidth = strlen(item.name);
+ ref_list.maxwidth = strlen(item.name);
print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
free(item.name);
}
