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pack-objects: further work on internal rev-list logic.

This teaches the internal rev-list logic to understand options
that are needed for pack handling: --all, --unpacked, and --thin.

It also moves two functions from builtin-rev-list to list-objects
so that the two programs can share more code.

Signed-off-by: Junio C Hamano <junkio@cox.net>
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commit 8d1d8f83b5d918c6071b606e321de9c31fed9e68 1 parent b5d97e6
Junio C Hamano authored
99 builtin-pack-objects.c
View
@@ -69,6 +69,7 @@ static int progress = 1;
static volatile sig_atomic_t progress_update;
static int window = 10;
static int pack_to_stdout;
+static int num_preferred_base;
/*
* The object names in objects array are hashed with this hashtable,
@@ -841,7 +842,7 @@ static int check_pbase_path(unsigned hash)
return 0;
}
-static void add_preferred_base_object(char *name, unsigned hash)
+static void add_preferred_base_object(const char *name, unsigned hash)
{
struct pbase_tree *it;
int cmplen = name_cmp_len(name);
@@ -870,6 +871,9 @@ static void add_preferred_base(unsigned char *sha1)
unsigned long size;
unsigned char tree_sha1[20];
+ if (window <= num_preferred_base++)
+ return;
+
data = read_object_with_reference(sha1, tree_type, &size, tree_sha1);
if (!data)
return;
@@ -1331,7 +1335,6 @@ static int git_pack_config(const char *k, const char *v)
static void read_object_list_from_stdin(void)
{
- int num_preferred_base = 0;
char line[40 + 1 + PATH_MAX + 2];
unsigned char sha1[20];
unsigned hash;
@@ -1351,8 +1354,7 @@ static void read_object_list_from_stdin(void)
if (get_sha1_hex(line+1, sha1))
die("expected edge sha1, got garbage:\n %s",
line);
- if (num_preferred_base++ < window)
- add_preferred_base(sha1);
+ add_preferred_base(sha1);
continue;
}
if (get_sha1_hex(line, sha1))
@@ -1364,71 +1366,36 @@ static void read_object_list_from_stdin(void)
}
}
-/* copied from rev-list but needs to do things slightly differently */
-static void mark_edge_parents_uninteresting(struct commit *commit)
-{
- struct commit_list *parents;
-
- for (parents = commit->parents; parents; parents = parents->next) {
- struct commit *parent = parents->item;
- if (!(parent->object.flags & UNINTERESTING))
- continue;
- mark_tree_uninteresting(parent->tree);
- }
-}
-
-static void mark_edges_uninteresting(struct commit_list *list)
-{
- for ( ; list; list = list->next) {
- struct commit *commit = list->item;
-
- if (commit->object.flags & UNINTERESTING) {
- mark_tree_uninteresting(commit->tree);
- continue;
- }
- mark_edge_parents_uninteresting(commit);
- }
-}
-
static void show_commit(struct commit *commit)
{
unsigned hash = name_hash("");
+ add_preferred_base_object("", hash);
add_object_entry(commit->object.sha1, hash, 0);
}
static void show_object(struct object_array_entry *p)
{
unsigned hash = name_hash(p->name);
+ add_preferred_base_object(p->name, hash);
add_object_entry(p->item->sha1, hash, 0);
}
-static void get_object_list(int unpacked, int all)
+static void show_edge(struct commit *commit)
+{
+ add_preferred_base(commit->object.sha1);
+}
+
+static void get_object_list(int ac, const char **av)
{
struct rev_info revs;
char line[1000];
- const char *av[6];
- int ac;
int flags = 0;
- av[0] = "pack-objects";
- av[1] = "--objects";
- ac = 2;
- if (unpacked)
- av[ac++] = "--unpacked";
- if (all)
- av[ac++] = "--all";
- av[ac++] = "--stdin";
- av[ac] = NULL;
-
init_revisions(&revs, NULL);
save_commit_buffer = 0;
track_object_refs = 0;
setup_revisions(ac, av, &revs, NULL);
- /* make sure we did not get pathspecs */
- if (revs.prune_data)
- die("pathspec given");
-
while (fgets(line, sizeof(line), stdin) != NULL) {
int len = strlen(line);
if (line[len - 1] == '\n')
@@ -1447,8 +1414,7 @@ static void get_object_list(int unpacked, int all)
}
prepare_revision_walk(&revs);
- mark_edges_uninteresting(revs.commits);
-
+ mark_edges_uninteresting(revs.commits, &revs, show_edge);
traverse_commit_list(&revs, show_commit, show_object);
}
@@ -1458,9 +1424,14 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
int depth = 10;
struct object_entry **list;
int use_internal_rev_list = 0;
- int unpacked = 0;
- int all = 0;
+ int thin = 0;
int i;
+ const char *rp_av[64];
+ int rp_ac;
+
+ rp_av[0] = "pack-objects";
+ rp_av[1] = "--objects"; /* --thin will make it --objects-edge */
+ rp_ac = 2;
git_config(git_pack_config);
@@ -1521,12 +1492,19 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
use_internal_rev_list = 1;
continue;
}
- if (!strcmp("--unpacked", arg)) {
- unpacked = 1;
+ if (!strcmp("--unpacked", arg) ||
+ !strncmp("--unpacked=", arg, 11) ||
+ !strcmp("--all", arg)) {
+ use_internal_rev_list = 1;
+ if (ARRAY_SIZE(rp_av) - 1 <= rp_ac)
+ die("too many internal rev-list options");
+ rp_av[rp_ac++] = arg;
continue;
}
- if (!strcmp("--all", arg)) {
- all = 1;
+ if (!strcmp("--thin", arg)) {
+ use_internal_rev_list = 1;
+ thin = 1;
+ rp_av[1] = "--objects-edge";
continue;
}
usage(pack_usage);
@@ -1551,9 +1529,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
if (pack_to_stdout != !base_name)
usage(pack_usage);
- /* --unpacked and --all makes sense only with --revs */
- if (!use_internal_rev_list && (unpacked || all))
- usage(pack_usage);
+ if (!pack_to_stdout && thin)
+ die("--thin cannot be used to build an indexable pack.");
prepare_packed_git();
@@ -1564,8 +1541,10 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
if (!use_internal_rev_list)
read_object_list_from_stdin();
- else
- get_object_list(unpacked, all);
+ else {
+ rp_av[rp_ac] = NULL;
+ get_object_list(rp_ac, rp_av);
+ }
if (progress)
fprintf(stderr, "Done counting %d objects.\n", nr_objects);
36 builtin-rev-list.c
View
@@ -114,6 +114,11 @@ static void show_object(struct object_array_entry *p)
printf("%s %s\n", sha1_to_hex(p->item->sha1), p->name);
}
+static void show_edge(struct commit *commit)
+{
+ printf("-%s\n", sha1_to_hex(commit->object.sha1));
+}
+
/*
* This is a truly stupid algorithm, but it's only
* used for bisection, and we just don't care enough.
@@ -192,35 +197,6 @@ static struct commit_list *find_bisection(struct commit_list *list)
return best;
}
-static void mark_edge_parents_uninteresting(struct commit *commit)
-{
- struct commit_list *parents;
-
- for (parents = commit->parents; parents; parents = parents->next) {
- struct commit *parent = parents->item;
- if (!(parent->object.flags & UNINTERESTING))
- continue;
- mark_tree_uninteresting(parent->tree);
- if (revs.edge_hint && !(parent->object.flags & SHOWN)) {
- parent->object.flags |= SHOWN;
- printf("-%s\n", sha1_to_hex(parent->object.sha1));
- }
- }
-}
-
-static void mark_edges_uninteresting(struct commit_list *list)
-{
- for ( ; list; list = list->next) {
- struct commit *commit = list->item;
-
- if (commit->object.flags & UNINTERESTING) {
- mark_tree_uninteresting(commit->tree);
- continue;
- }
- mark_edge_parents_uninteresting(commit);
- }
-}
-
static void read_revisions_from_stdin(struct rev_info *revs)
{
char line[1000];
@@ -300,7 +276,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
prepare_revision_walk(&revs);
if (revs.tree_objects)
- mark_edges_uninteresting(revs.commits);
+ mark_edges_uninteresting(revs.commits, &revs, show_edge);
if (bisect_list)
revs.commits = find_bisection(revs.commits);
33 list-objects.c
View
@@ -66,6 +66,39 @@ static void process_tree(struct rev_info *revs,
tree->buffer = NULL;
}
+static void mark_edge_parents_uninteresting(struct commit *commit,
+ struct rev_info *revs,
+ show_edge_fn show_edge)
+{
+ struct commit_list *parents;
+
+ for (parents = commit->parents; parents; parents = parents->next) {
+ struct commit *parent = parents->item;
+ if (!(parent->object.flags & UNINTERESTING))
+ continue;
+ mark_tree_uninteresting(parent->tree);
+ if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
+ parent->object.flags |= SHOWN;
+ show_edge(parent);
+ }
+ }
+}
+
+void mark_edges_uninteresting(struct commit_list *list,
+ struct rev_info *revs,
+ show_edge_fn show_edge)
+{
+ for ( ; list; list = list->next) {
+ struct commit *commit = list->item;
+
+ if (commit->object.flags & UNINTERESTING) {
+ mark_tree_uninteresting(commit->tree);
+ continue;
+ }
+ mark_edge_parents_uninteresting(commit, revs, show_edge);
+ }
+}
+
void traverse_commit_list(struct rev_info *revs,
void (*show_commit)(struct commit *),
void (*show_object)(struct object_array_entry *))
10 list-objects.h
View
@@ -1,8 +1,12 @@
#ifndef LIST_OBJECTS_H
#define LIST_OBJECTS_H
-void traverse_commit_list(struct rev_info *revs,
- void (*show_commit)(struct commit *),
- void (*show_object)(struct object_array_entry *));
+typedef void (*show_commit_fn)(struct commit *);
+typedef void (*show_object_fn)(struct object_array_entry *);
+typedef void (*show_edge_fn)(struct commit *);
+
+void traverse_commit_list(struct rev_info *revs, show_commit_fn, show_object_fn);
+
+void mark_edges_uninteresting(struct commit_list *, struct rev_info *, show_edge_fn);
#endif
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