Merge branch 'ah/doc-updates'
[gitweb.git] / shallow.c
index 9ff83cabcd3be2614f7ed770884ac237294b05e4..732e18d54f3b88d8a081786eabd030d84eb7e0a3 100644 (file)
--- a/shallow.c
+++ b/shallow.c
@@ -1,6 +1,8 @@
 #include "cache.h"
+#include "repository.h"
 #include "tempfile.h"
 #include "lockfile.h"
+#include "object-store.h"
 #include "commit.h"
 #include "tag.h"
 #include "pkt-line.h"
 #include "commit-slab.h"
 #include "revision.h"
 #include "list-objects.h"
+#include "commit-slab.h"
+#include "repository.h"
+#include "commit-reach.h"
 
-static int is_shallow = -1;
-static struct stat_validity shallow_stat;
-static char *alternate_shallow_file;
-
-void set_alternate_shallow_file(const char *path, int override)
+void set_alternate_shallow_file(struct repository *r, const char *path, int override)
 {
-       if (is_shallow != -1)
+       if (r->parsed_objects->is_shallow != -1)
                BUG("is_repository_shallow must not be called before set_alternate_shallow_file");
-       if (alternate_shallow_file && !override)
+       if (r->parsed_objects->alternate_shallow_file && !override)
                return;
-       free(alternate_shallow_file);
-       alternate_shallow_file = xstrdup_or_null(path);
+       free(r->parsed_objects->alternate_shallow_file);
+       r->parsed_objects->alternate_shallow_file = xstrdup_or_null(path);
 }
 
-int register_shallow(const struct object_id *oid)
+int register_shallow(struct repository *r, const struct object_id *oid)
 {
        struct commit_graft *graft =
                xmalloc(sizeof(struct commit_graft));
-       struct commit *commit = lookup_commit(oid);
+       struct commit *commit = lookup_commit(the_repository, oid);
 
        oidcpy(&graft->oid, oid);
        graft->nr_parent = -1;
        if (commit && commit->object.parsed)
                commit->parents = NULL;
-       return register_commit_graft(graft, 0);
+       return register_commit_graft(r, graft, 0);
 }
 
-int is_repository_shallow(void)
+int is_repository_shallow(struct repository *r)
 {
        FILE *fp;
        char buf[1024];
-       const char *path = alternate_shallow_file;
+       const char *path = r->parsed_objects->alternate_shallow_file;
 
-       if (is_shallow >= 0)
-               return is_shallow;
+       if (r->parsed_objects->is_shallow >= 0)
+               return r->parsed_objects->is_shallow;
 
        if (!path)
-               path = git_path_shallow();
+               path = git_path_shallow(r);
        /*
         * fetch-pack sets '--shallow-file ""' as an indicator that no
         * shallow file should be used. We could just open it and it
         * will likely fail. But let's do an explicit check instead.
         */
        if (!*path || (fp = fopen(path, "r")) == NULL) {
-               stat_validity_clear(&shallow_stat);
-               is_shallow = 0;
-               return is_shallow;
+               stat_validity_clear(r->parsed_objects->shallow_stat);
+               r->parsed_objects->is_shallow = 0;
+               return r->parsed_objects->is_shallow;
        }
-       stat_validity_update(&shallow_stat, fileno(fp));
-       is_shallow = 1;
+       stat_validity_update(r->parsed_objects->shallow_stat, fileno(fp));
+       r->parsed_objects->is_shallow = 1;
 
        while (fgets(buf, sizeof(buf), fp)) {
                struct object_id oid;
                if (get_oid_hex(buf, &oid))
                        die("bad shallow line: %s", buf);
-               register_shallow(&oid);
+               register_shallow(r, &oid);
        }
        fclose(fp);
-       return is_shallow;
+       return r->parsed_objects->is_shallow;
 }
 
+/*
+ * TODO: use "int" elemtype instead of "int *" when/if commit-slab
+ * supports a "valid" flag.
+ */
+define_commit_slab(commit_depth, int *);
 struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
                int shallow_flag, int not_shallow_flag)
 {
@@ -82,32 +88,38 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
        struct object_array stack = OBJECT_ARRAY_INIT;
        struct commit *commit = NULL;
        struct commit_graft *graft;
+       struct commit_depth depths;
 
+       init_commit_depth(&depths);
        while (commit || i < heads->nr || stack.nr) {
                struct commit_list *p;
                if (!commit) {
                        if (i < heads->nr) {
+                               int **depth_slot;
                                commit = (struct commit *)
-                                       deref_tag(heads->objects[i++].item, NULL, 0);
+                                       deref_tag(the_repository,
+                                                 heads->objects[i++].item,
+                                                 NULL, 0);
                                if (!commit || commit->object.type != OBJ_COMMIT) {
                                        commit = NULL;
                                        continue;
                                }
-                               if (!commit->util)
-                                       commit->util = xmalloc(sizeof(int));
-                               *(int *)commit->util = 0;
+                               depth_slot = commit_depth_at(&depths, commit);
+                               if (!*depth_slot)
+                                       *depth_slot = xmalloc(sizeof(int));
+                               **depth_slot = 0;
                                cur_depth = 0;
                        } else {
                                commit = (struct commit *)
                                        object_array_pop(&stack);
-                               cur_depth = *(int *)commit->util;
+                               cur_depth = **commit_depth_at(&depths, commit);
                        }
                }
                parse_commit_or_die(commit);
                cur_depth++;
                if ((depth != INFINITE_DEPTH && cur_depth >= depth) ||
-                   (is_repository_shallow() && !commit->parents &&
-                    (graft = lookup_commit_graft(&commit->object.oid)) != NULL &&
+                   (is_repository_shallow(the_repository) && !commit->parents &&
+                    (graft = lookup_commit_graft(the_repository, &commit->object.oid)) != NULL &&
                     graft->nr_parent < 0)) {
                        commit_list_insert(commit, &result);
                        commit->object.flags |= shallow_flag;
@@ -116,25 +128,31 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
                }
                commit->object.flags |= not_shallow_flag;
                for (p = commit->parents, commit = NULL; p; p = p->next) {
-                       if (!p->item->util) {
-                               int *pointer = xmalloc(sizeof(int));
-                               p->item->util = pointer;
-                               *pointer =  cur_depth;
+                       int **depth_slot = commit_depth_at(&depths, p->item);
+                       if (!*depth_slot) {
+                               *depth_slot = xmalloc(sizeof(int));
+                               **depth_slot = cur_depth;
                        } else {
-                               int *pointer = p->item->util;
-                               if (cur_depth >= *pointer)
+                               if (cur_depth >= **depth_slot)
                                        continue;
-                               *pointer = cur_depth;
+                               **depth_slot = cur_depth;
                        }
                        if (p->next)
                                add_object_array(&p->item->object,
                                                NULL, &stack);
                        else {
                                commit = p->item;
-                               cur_depth = *(int *)commit->util;
+                               cur_depth = **commit_depth_at(&depths, commit);
                        }
                }
        }
+       for (i = 0; i < depths.slab_count; i++) {
+               int j;
+
+               for (j = 0; j < depths.slab_size; j++)
+                       free(depths.slab[i][j]);
+       }
+       clear_commit_depth(&depths);
 
        return result;
 }
@@ -165,9 +183,9 @@ struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
         */
        clear_object_flags(both_flags);
 
-       is_repository_shallow(); /* make sure shallows are read */
+       is_repository_shallow(the_repository); /* make sure shallows are read */
 
-       init_revisions(&revs, NULL);
+       repo_init_revisions(the_repository, &revs, NULL);
        save_commit_buffer = 0;
        setup_revisions(ac, av, &revs, NULL);
 
@@ -175,6 +193,9 @@ struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
                die("revision walk setup failed");
        traverse_commit_list(&revs, show_commit, NULL, &not_shallow_list);
 
+       if (!not_shallow_list)
+               die("no commits selected for shallow requests");
+
        /* Mark all reachable commits as NOT_SHALLOW */
        for (p = not_shallow_list; p; p = p->next)
                p->item->object.flags |= not_shallow_flag;
@@ -215,12 +236,12 @@ struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av,
        return result;
 }
 
-static void check_shallow_file_for_update(void)
+static void check_shallow_file_for_update(struct repository *r)
 {
-       if (is_shallow == -1)
+       if (r->parsed_objects->is_shallow == -1)
                BUG("shallow must be initialized by now");
 
-       if (!stat_validity_check(&shallow_stat, git_path_shallow()))
+       if (!stat_validity_check(r->parsed_objects->shallow_stat, git_path_shallow(the_repository)))
                die("shallow file has changed since we read it");
 }
 
@@ -241,7 +262,7 @@ 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);
+               struct commit *c = lookup_commit(the_repository, &graft->oid);
                if (!c || !(c->object.flags & SEEN)) {
                        if (data->flags & VERBOSE)
                                printf("Removing %s from .git/shallow\n",
@@ -315,9 +336,10 @@ void setup_alternate_shallow(struct lock_file *shallow_lock,
        struct strbuf sb = STRBUF_INIT;
        int fd;
 
-       fd = hold_lock_file_for_update(shallow_lock, git_path_shallow(),
+       fd = hold_lock_file_for_update(shallow_lock,
+                                      git_path_shallow(the_repository),
                                       LOCK_DIE_ON_ERROR);
-       check_shallow_file_for_update();
+       check_shallow_file_for_update(the_repository);
        if (write_shallow_commits(&sb, 0, extra)) {
                if (write_in_full(fd, sb.buf, sb.len) < 0)
                        die_errno("failed to write to %s",
@@ -342,7 +364,7 @@ static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *c
 
 void advertise_shallow_grafts(int fd)
 {
-       if (!is_repository_shallow())
+       if (!is_repository_shallow(the_repository))
                return;
        for_each_commit_graft(advertise_shallow_grafts_cb, &fd);
 }
@@ -362,16 +384,17 @@ void prune_shallow(int show_only)
                strbuf_release(&sb);
                return;
        }
-       fd = hold_lock_file_for_update(&shallow_lock, git_path_shallow(),
+       fd = hold_lock_file_for_update(&shallow_lock,
+                                      git_path_shallow(the_repository),
                                       LOCK_DIE_ON_ERROR);
-       check_shallow_file_for_update();
+       check_shallow_file_for_update(the_repository);
        if (write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY)) {
                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);
        } else {
-               unlink(git_path_shallow());
+               unlink(git_path_shallow(the_repository));
                rollback_lock_file(&shallow_lock);
        }
        strbuf_release(&sb);
@@ -396,7 +419,8 @@ void prepare_shallow_info(struct shallow_info *info, struct oid_array *sa)
        for (i = 0; i < sa->nr; i++) {
                if (has_object_file(sa->oid + i)) {
                        struct commit_graft *graft;
-                       graft = lookup_commit_graft(&sa->oid[i]);
+                       graft = lookup_commit_graft(the_repository,
+                                                   &sa->oid[i]);
                        if (graft && graft->nr_parent < 0)
                                continue;
                        info->ours[info->nr_ours++] = i;
@@ -471,7 +495,8 @@ static void paint_down(struct paint_info *info, const struct object_id *oid,
        struct commit_list *head = NULL;
        int bitmap_nr = DIV_ROUND_UP(info->nr_bits, 32);
        size_t bitmap_size = st_mult(sizeof(uint32_t), bitmap_nr);
-       struct commit *c = lookup_commit_reference_gently(oid, 1);
+       struct commit *c = lookup_commit_reference_gently(the_repository, oid,
+                                                         1);
        uint32_t *tmp; /* to be freed before return */
        uint32_t *bitmap;
 
@@ -533,7 +558,8 @@ static void paint_down(struct paint_info *info, const struct object_id *oid,
 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, 1);
+       struct commit *commit = lookup_commit_reference_gently(the_repository,
+                                                              oid, 1);
        if (!commit)
                return 0;
        commit->object.flags |= UNINTERESTING;
@@ -601,7 +627,8 @@ 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(&oid[shallow[i]]);
+               struct commit *c = lookup_commit(the_repository,
+                                                &oid[shallow[i]]);
                c->object.flags |= BOTTOM;
        }
 
@@ -612,7 +639,8 @@ void assign_shallow_commits_to_refs(struct shallow_info *info,
                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(&oid[shallow[i]]);
+                       const struct commit *c = lookup_commit(the_repository,
+                                                              &oid[shallow[i]]);
                        uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c);
                        if (*map)
                                used[shallow[i]] = xmemdupz(*map, bitmap_size);
@@ -643,7 +671,8 @@ 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, 1);
+       ca->commits[ca->nr] = lookup_commit_reference_gently(the_repository,
+                                                            oid, 1);
        if (ca->commits[ca->nr])
                ca->nr++;
        return 0;
@@ -681,7 +710,7 @@ 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(&oid[info->theirs[i]]);
+               c = lookup_commit(the_repository, &oid[info->theirs[i]]);
                bitmap = ref_bitmap_at(ref_bitmap, c);
                if (!*bitmap)
                        continue;
@@ -702,7 +731,7 @@ 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(&oid[info->ours[i]]);
+               c = lookup_commit(the_repository, &oid[info->ours[i]]);
                bitmap = ref_bitmap_at(ref_bitmap, c);
                if (!*bitmap)
                        continue;
@@ -724,7 +753,8 @@ 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->oid[c]);
+               struct commit *commit = lookup_commit(the_repository,
+                                                     &si->shallow->oid[c]);
 
                if (!si->commits) {
                        struct commit_array ca;