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-rw-r--r--shallow.c219
1 files changed, 150 insertions, 69 deletions
diff --git a/shallow.c b/shallow.c
index 54e2db7334..df4d44ea7a 100644
--- a/shallow.c
+++ b/shallow.c
@@ -10,6 +10,8 @@
#include "diff.h"
#include "revision.h"
#include "commit-slab.h"
+#include "revision.h"
+#include "list-objects.h"
static int is_shallow = -1;
static struct stat_validity shallow_stat;
@@ -25,13 +27,13 @@ void set_alternate_shallow_file(const char *path, int override)
alternate_shallow_file = xstrdup_or_null(path);
}
-int register_shallow(const unsigned char *sha1)
+int register_shallow(const struct object_id *oid)
{
struct commit_graft *graft =
xmalloc(sizeof(struct commit_graft));
- struct commit *commit = lookup_commit(sha1);
+ struct commit *commit = lookup_commit(oid);
- hashcpy(graft->oid.hash, sha1);
+ oidcpy(&graft->oid, oid);
graft->nr_parent = -1;
if (commit && commit->object.parsed)
commit->parents = NULL;
@@ -63,10 +65,10 @@ int is_repository_shallow(void)
is_shallow = 1;
while (fgets(buf, sizeof(buf), fp)) {
- unsigned char sha1[20];
- if (get_sha1_hex(buf, sha1))
+ struct object_id oid;
+ if (get_oid_hex(buf, &oid))
die("bad shallow line: %s", buf);
- register_shallow(sha1);
+ register_shallow(&oid);
}
fclose(fp);
return is_shallow;
@@ -97,7 +99,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
cur_depth = 0;
} else {
commit = (struct commit *)
- stack.objects[--stack.nr].item;
+ object_array_pop(&stack);
cur_depth = *(int *)commit->util;
}
}
@@ -105,7 +107,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
cur_depth++;
if ((depth != INFINITE_DEPTH && cur_depth >= depth) ||
(is_repository_shallow() && !commit->parents &&
- (graft = lookup_commit_graft(commit->object.oid.hash)) != NULL &&
+ (graft = lookup_commit_graft(&commit->object.oid)) != NULL &&
graft->nr_parent < 0)) {
commit_list_insert(commit, &result);
commit->object.flags |= shallow_flag;
@@ -137,6 +139,82 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
return result;
}
+static void show_commit(struct commit *commit, void *data)
+{
+ commit_list_insert(commit, data);
+}
+
+/*
+ * Given rev-list arguments, run rev-list. All reachable commits
+ * except border ones are marked with not_shallow_flag. Border commits
+ * are marked with shallow_flag. The list of border/shallow commits
+ * are also returned.
+ */
+struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
+ int shallow_flag,
+ int not_shallow_flag)
+{
+ struct commit_list *result = NULL, *p;
+ struct commit_list *not_shallow_list = NULL;
+ struct rev_info revs;
+ int both_flags = shallow_flag | not_shallow_flag;
+
+ /*
+ * SHALLOW (excluded) and NOT_SHALLOW (included) should not be
+ * set at this point. But better be safe than sorry.
+ */
+ clear_object_flags(both_flags);
+
+ is_repository_shallow(); /* make sure shallows are read */
+
+ init_revisions(&revs, NULL);
+ save_commit_buffer = 0;
+ setup_revisions(ac, av, &revs, NULL);
+
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+ traverse_commit_list(&revs, show_commit, NULL, &not_shallow_list);
+
+ /* Mark all reachable commits as NOT_SHALLOW */
+ for (p = not_shallow_list; p; p = p->next)
+ p->item->object.flags |= not_shallow_flag;
+
+ /*
+ * mark border commits SHALLOW + NOT_SHALLOW.
+ * We cannot clear NOT_SHALLOW right now. Imagine border
+ * commit A is processed first, then commit B, whose parent is
+ * A, later. If NOT_SHALLOW on A is cleared at step 1, B
+ * itself is considered border at step 2, which is incorrect.
+ */
+ for (p = not_shallow_list; p; p = p->next) {
+ struct commit *c = p->item;
+ struct commit_list *parent;
+
+ if (parse_commit(c))
+ die("unable to parse commit %s",
+ oid_to_hex(&c->object.oid));
+
+ for (parent = c->parents; parent; parent = parent->next)
+ if (!(parent->item->object.flags & not_shallow_flag)) {
+ c->object.flags |= shallow_flag;
+ commit_list_insert(c, &result);
+ break;
+ }
+ }
+ free_commit_list(not_shallow_list);
+
+ /*
+ * Now we can clean up NOT_SHALLOW on border commits. Having
+ * both flags set can confuse the caller.
+ */
+ for (p = result; p; p = p->next) {
+ struct object *o = &p->item->object;
+ if ((o->flags & both_flags) == both_flags)
+ o->flags &= ~not_shallow_flag;
+ }
+ return result;
+}
+
static void check_shallow_file_for_update(void)
{
if (is_shallow == -1)
@@ -163,7 +241,7 @@ static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
if (graft->nr_parent != -1)
return 0;
if (data->flags & SEEN_ONLY) {
- struct commit *c = lookup_commit(graft->oid.hash);
+ struct commit *c = lookup_commit(&graft->oid);
if (!c || !(c->object.flags & SEEN)) {
if (data->flags & VERBOSE)
printf("Removing %s from .git/shallow\n",
@@ -182,7 +260,7 @@ static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
}
static int write_shallow_commits_1(struct strbuf *out, int use_pack_protocol,
- const struct sha1_array *extra,
+ const struct oid_array *extra,
unsigned flags)
{
struct write_shallow_data data;
@@ -195,7 +273,7 @@ static int write_shallow_commits_1(struct strbuf *out, int use_pack_protocol,
if (!extra)
return data.count;
for (i = 0; i < extra->nr; i++) {
- strbuf_addstr(out, sha1_to_hex(extra->sha1[i]));
+ strbuf_addstr(out, oid_to_hex(extra->oid + i));
strbuf_addch(out, '\n');
data.count++;
}
@@ -203,38 +281,36 @@ static int write_shallow_commits_1(struct strbuf *out, int use_pack_protocol,
}
int write_shallow_commits(struct strbuf *out, int use_pack_protocol,
- const struct sha1_array *extra)
+ const struct oid_array *extra)
{
return write_shallow_commits_1(out, use_pack_protocol, extra, 0);
}
-static struct tempfile temporary_shallow;
-
-const char *setup_temporary_shallow(const struct sha1_array *extra)
+const char *setup_temporary_shallow(const struct oid_array *extra)
{
+ struct tempfile *temp;
struct strbuf sb = STRBUF_INIT;
- int fd;
if (write_shallow_commits(&sb, 0, extra)) {
- fd = xmks_tempfile(&temporary_shallow, git_path("shallow_XXXXXX"));
+ temp = xmks_tempfile(git_path("shallow_XXXXXX"));
- if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+ if (write_in_full(temp->fd, sb.buf, sb.len) < 0 ||
+ close_tempfile_gently(temp) < 0)
die_errno("failed to write to %s",
- get_tempfile_path(&temporary_shallow));
- close_tempfile(&temporary_shallow);
+ get_tempfile_path(temp));
strbuf_release(&sb);
- return get_tempfile_path(&temporary_shallow);
+ return get_tempfile_path(temp);
}
/*
* is_repository_shallow() sees empty string as "no shallow
* file".
*/
- return get_tempfile_path(&temporary_shallow);
+ return "";
}
void setup_alternate_shallow(struct lock_file *shallow_lock,
const char **alternate_shallow_file,
- const struct sha1_array *extra)
+ const struct oid_array *extra)
{
struct strbuf sb = STRBUF_INIT;
int fd;
@@ -243,7 +319,7 @@ void setup_alternate_shallow(struct lock_file *shallow_lock,
LOCK_DIE_ON_ERROR);
check_shallow_file_for_update();
if (write_shallow_commits(&sb, 0, extra)) {
- if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+ if (write_in_full(fd, sb.buf, sb.len) < 0)
die_errno("failed to write to %s",
get_lock_file_path(shallow_lock));
*alternate_shallow_file = get_lock_file_path(shallow_lock);
@@ -260,7 +336,7 @@ static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *c
{
int fd = *(int *)cb;
if (graft->nr_parent == -1)
- packet_write(fd, "shallow %s\n", oid_to_hex(&graft->oid));
+ packet_write_fmt(fd, "shallow %s\n", oid_to_hex(&graft->oid));
return 0;
}
@@ -290,7 +366,7 @@ void prune_shallow(int show_only)
LOCK_DIE_ON_ERROR);
check_shallow_file_for_update();
if (write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY)) {
- if (write_in_full(fd, sb.buf, sb.len) != sb.len)
+ if (write_in_full(fd, sb.buf, sb.len) < 0)
die_errno("failed to write to %s",
get_lock_file_path(&shallow_lock));
commit_lock_file(&shallow_lock);
@@ -307,7 +383,7 @@ struct trace_key trace_shallow = TRACE_KEY_INIT(SHALLOW);
* Step 1, split sender shallow commits into "ours" and "theirs"
* Step 2, clean "ours" based on .git/shallow
*/
-void prepare_shallow_info(struct shallow_info *info, struct sha1_array *sa)
+void prepare_shallow_info(struct shallow_info *info, struct oid_array *sa)
{
int i;
trace_printf_key(&trace_shallow, "shallow: prepare_shallow_info\n");
@@ -318,9 +394,9 @@ void prepare_shallow_info(struct shallow_info *info, struct sha1_array *sa)
ALLOC_ARRAY(info->ours, sa->nr);
ALLOC_ARRAY(info->theirs, sa->nr);
for (i = 0; i < sa->nr; i++) {
- if (has_sha1_file(sa->sha1[i])) {
+ if (has_object_file(sa->oid + i)) {
struct commit_graft *graft;
- graft = lookup_commit_graft(sa->sha1[i]);
+ graft = lookup_commit_graft(&sa->oid[i]);
if (graft && graft->nr_parent < 0)
continue;
info->ours[info->nr_ours++] = i;
@@ -339,13 +415,13 @@ void clear_shallow_info(struct shallow_info *info)
void remove_nonexistent_theirs_shallow(struct shallow_info *info)
{
- unsigned char (*sha1)[20] = info->shallow->sha1;
+ struct object_id *oid = info->shallow->oid;
int i, dst;
trace_printf_key(&trace_shallow, "shallow: remove_nonexistent_theirs_shallow\n");
for (i = dst = 0; i < info->nr_theirs; i++) {
if (i != dst)
info->theirs[dst] = info->theirs[i];
- if (has_sha1_file(sha1[info->theirs[i]]))
+ if (has_object_file(oid + info->theirs[i]))
dst++;
}
info->nr_theirs = dst;
@@ -353,25 +429,30 @@ void remove_nonexistent_theirs_shallow(struct shallow_info *info)
define_commit_slab(ref_bitmap, uint32_t *);
+#define POOL_SIZE (512 * 1024)
+
struct paint_info {
struct ref_bitmap ref_bitmap;
unsigned nr_bits;
- char **slab;
+ char **pools;
char *free, *end;
- unsigned slab_count;
+ unsigned pool_count;
};
static uint32_t *paint_alloc(struct paint_info *info)
{
- unsigned nr = (info->nr_bits + 31) / 32;
+ unsigned nr = DIV_ROUND_UP(info->nr_bits, 32);
unsigned size = nr * sizeof(uint32_t);
void *p;
- if (!info->slab_count || info->free + size > info->end) {
- info->slab_count++;
- REALLOC_ARRAY(info->slab, info->slab_count);
- info->free = xmalloc(COMMIT_SLAB_SIZE);
- info->slab[info->slab_count - 1] = info->free;
- info->end = info->free + COMMIT_SLAB_SIZE;
+ if (!info->pool_count || size > info->end - info->free) {
+ if (size > POOL_SIZE)
+ die("BUG: pool size too small for %d in paint_alloc()",
+ size);
+ info->pool_count++;
+ REALLOC_ARRAY(info->pools, info->pool_count);
+ info->free = xmalloc(POOL_SIZE);
+ info->pools[info->pool_count - 1] = info->free;
+ info->end = info->free + POOL_SIZE;
}
p = info->free;
info->free += size;
@@ -383,20 +464,24 @@ static uint32_t *paint_alloc(struct paint_info *info)
* UNINTERESTING or BOTTOM is hit. Set the id-th bit in ref_bitmap for
* all walked commits.
*/
-static void paint_down(struct paint_info *info, const unsigned char *sha1,
- int id)
+static void paint_down(struct paint_info *info, const struct object_id *oid,
+ unsigned int id)
{
unsigned int i, nr;
struct commit_list *head = NULL;
- int bitmap_nr = (info->nr_bits + 31) / 32;
+ int bitmap_nr = DIV_ROUND_UP(info->nr_bits, 32);
size_t bitmap_size = st_mult(sizeof(uint32_t), bitmap_nr);
- uint32_t *tmp = xmalloc(bitmap_size); /* to be freed before return */
- uint32_t *bitmap = paint_alloc(info);
- struct commit *c = lookup_commit_reference_gently(sha1, 1);
+ struct commit *c = lookup_commit_reference_gently(oid, 1);
+ uint32_t *tmp; /* to be freed before return */
+ uint32_t *bitmap;
+
if (!c)
return;
+
+ tmp = xmalloc(bitmap_size);
+ bitmap = paint_alloc(info);
memset(bitmap, 0, bitmap_size);
- bitmap[id / 32] |= (1 << (id % 32));
+ bitmap[id / 32] |= (1U << (id % 32));
commit_list_insert(c, &head);
while (head) {
struct commit_list *p;
@@ -429,12 +514,8 @@ static void paint_down(struct paint_info *info, const unsigned char *sha1,
oid_to_hex(&c->object.oid));
for (p = c->parents; p; p = p->next) {
- uint32_t **p_refs = ref_bitmap_at(&info->ref_bitmap,
- p->item);
if (p->item->object.flags & SEEN)
continue;
- if (*p_refs == NULL || *p_refs == *refs)
- *p_refs = *refs;
commit_list_insert(p->item, &head);
}
}
@@ -452,7 +533,7 @@ static void paint_down(struct paint_info *info, const unsigned char *sha1,
static int mark_uninteresting(const char *refname, const struct object_id *oid,
int flags, void *cb_data)
{
- struct commit *commit = lookup_commit_reference_gently(oid->hash, 1);
+ struct commit *commit = lookup_commit_reference_gently(oid, 1);
if (!commit)
return 0;
commit->object.flags |= UNINTERESTING;
@@ -480,8 +561,8 @@ static void post_assign_shallow(struct shallow_info *info,
void assign_shallow_commits_to_refs(struct shallow_info *info,
uint32_t **used, int *ref_status)
{
- unsigned char (*sha1)[20] = info->shallow->sha1;
- struct sha1_array *ref = info->ref;
+ struct object_id *oid = info->shallow->oid;
+ struct oid_array *ref = info->ref;
unsigned int i, nr;
int *shallow, nr_shallow = 0;
struct paint_info pi;
@@ -520,18 +601,18 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
/* Mark potential bottoms so we won't go out of bound */
for (i = 0; i < nr_shallow; i++) {
- struct commit *c = lookup_commit(sha1[shallow[i]]);
+ struct commit *c = lookup_commit(&oid[shallow[i]]);
c->object.flags |= BOTTOM;
}
for (i = 0; i < ref->nr; i++)
- paint_down(&pi, ref->sha1[i], i);
+ paint_down(&pi, ref->oid + i, i);
if (used) {
- int bitmap_size = ((pi.nr_bits + 31) / 32) * sizeof(uint32_t);
+ int bitmap_size = DIV_ROUND_UP(pi.nr_bits, 32) * sizeof(uint32_t);
memset(used, 0, sizeof(*used) * info->shallow->nr);
for (i = 0; i < nr_shallow; i++) {
- const struct commit *c = lookup_commit(sha1[shallow[i]]);
+ const struct commit *c = lookup_commit(&oid[shallow[i]]);
uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c);
if (*map)
used[shallow[i]] = xmemdupz(*map, bitmap_size);
@@ -546,9 +627,9 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
post_assign_shallow(info, &pi.ref_bitmap, ref_status);
clear_ref_bitmap(&pi.ref_bitmap);
- for (i = 0; i < pi.slab_count; i++)
- free(pi.slab[i]);
- free(pi.slab);
+ for (i = 0; i < pi.pool_count; i++)
+ free(pi.pools[i]);
+ free(pi.pools);
free(shallow);
}
@@ -562,7 +643,7 @@ static int add_ref(const char *refname, const struct object_id *oid,
{
struct commit_array *ca = cb_data;
ALLOC_GROW(ca->commits, ca->nr + 1, ca->alloc);
- ca->commits[ca->nr] = lookup_commit_reference_gently(oid->hash, 1);
+ ca->commits[ca->nr] = lookup_commit_reference_gently(oid, 1);
if (ca->commits[ca->nr])
ca->nr++;
return 0;
@@ -570,11 +651,11 @@ static int add_ref(const char *refname, const struct object_id *oid,
static void update_refstatus(int *ref_status, int nr, uint32_t *bitmap)
{
- int i;
+ unsigned int i;
if (!ref_status)
return;
for (i = 0; i < nr; i++)
- if (bitmap[i / 32] & (1 << (i % 32)))
+ if (bitmap[i / 32] & (1U << (i % 32)))
ref_status[i]++;
}
@@ -585,11 +666,11 @@ static void post_assign_shallow(struct shallow_info *info,
struct ref_bitmap *ref_bitmap,
int *ref_status)
{
- unsigned char (*sha1)[20] = info->shallow->sha1;
+ struct object_id *oid = info->shallow->oid;
struct commit *c;
uint32_t **bitmap;
int dst, i, j;
- int bitmap_nr = (info->ref->nr + 31) / 32;
+ int bitmap_nr = DIV_ROUND_UP(info->ref->nr, 32);
struct commit_array ca;
trace_printf_key(&trace_shallow, "shallow: post_assign_shallow\n");
@@ -600,7 +681,7 @@ static void post_assign_shallow(struct shallow_info *info,
for (i = dst = 0; i < info->nr_theirs; i++) {
if (i != dst)
info->theirs[dst] = info->theirs[i];
- c = lookup_commit(sha1[info->theirs[i]]);
+ c = lookup_commit(&oid[info->theirs[i]]);
bitmap = ref_bitmap_at(ref_bitmap, c);
if (!*bitmap)
continue;
@@ -621,7 +702,7 @@ static void post_assign_shallow(struct shallow_info *info,
for (i = dst = 0; i < info->nr_ours; i++) {
if (i != dst)
info->ours[dst] = info->ours[i];
- c = lookup_commit(sha1[info->ours[i]]);
+ c = lookup_commit(&oid[info->ours[i]]);
bitmap = ref_bitmap_at(ref_bitmap, c);
if (!*bitmap)
continue;
@@ -643,7 +724,7 @@ static void post_assign_shallow(struct shallow_info *info,
int delayed_reachability_test(struct shallow_info *si, int c)
{
if (si->need_reachability_test[c]) {
- struct commit *commit = lookup_commit(si->shallow->sha1[c]);
+ struct commit *commit = lookup_commit(&si->shallow->oid[c]);
if (!si->commits) {
struct commit_array ca;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 21:24:32 +0000