reachable.con commit cvsserver: fix revision number during file adds (3486595)
   1#include "cache.h"
   2#include "refs.h"
   3#include "tag.h"
   4#include "commit.h"
   5#include "blob.h"
   6#include "diff.h"
   7#include "revision.h"
   8#include "reachable.h"
   9#include "cache-tree.h"
  10
  11static void process_blob(struct blob *blob,
  12                         struct object_array *p,
  13                         struct name_path *path,
  14                         const char *name)
  15{
  16        struct object *obj = &blob->object;
  17
  18        if (obj->flags & SEEN)
  19                return;
  20        obj->flags |= SEEN;
  21        /* Nothing to do, really .. The blob lookup was the important part */
  22}
  23
  24static void process_tree(struct tree *tree,
  25                         struct object_array *p,
  26                         struct name_path *path,
  27                         const char *name)
  28{
  29        struct object *obj = &tree->object;
  30        struct tree_desc desc;
  31        struct name_entry entry;
  32        struct name_path me;
  33
  34        if (obj->flags & SEEN)
  35                return;
  36        obj->flags |= SEEN;
  37        if (parse_tree(tree) < 0)
  38                die("bad tree object %s", sha1_to_hex(obj->sha1));
  39        name = xstrdup(name);
  40        add_object(obj, p, path, name);
  41        me.up = path;
  42        me.elem = name;
  43        me.elem_len = strlen(name);
  44
  45        desc.buf = tree->buffer;
  46        desc.size = tree->size;
  47
  48        while (tree_entry(&desc, &entry)) {
  49                if (S_ISDIR(entry.mode))
  50                        process_tree(lookup_tree(entry.sha1), p, &me, entry.path);
  51                else
  52                        process_blob(lookup_blob(entry.sha1), p, &me, entry.path);
  53        }
  54        free(tree->buffer);
  55        tree->buffer = NULL;
  56}
  57
  58static void process_tag(struct tag *tag, struct object_array *p, const char *name)
  59{
  60        struct object *obj = &tag->object;
  61        struct name_path me;
  62
  63        if (obj->flags & SEEN)
  64                return;
  65        obj->flags |= SEEN;
  66
  67        me.up = NULL;
  68        me.elem = "tag:/";
  69        me.elem_len = 5;
  70
  71        if (parse_tag(tag) < 0)
  72                die("bad tag object %s", sha1_to_hex(obj->sha1));
  73        add_object(tag->tagged, p, NULL, name);
  74}
  75
  76static void walk_commit_list(struct rev_info *revs)
  77{
  78        int i;
  79        struct commit *commit;
  80        struct object_array objects = { 0, 0, NULL };
  81
  82        /* Walk all commits, process their trees */
  83        while ((commit = get_revision(revs)) != NULL)
  84                process_tree(commit->tree, &objects, NULL, "");
  85
  86        /* Then walk all the pending objects, recursively processing them too */
  87        for (i = 0; i < revs->pending.nr; i++) {
  88                struct object_array_entry *pending = revs->pending.objects + i;
  89                struct object *obj = pending->item;
  90                const char *name = pending->name;
  91                if (obj->type == OBJ_TAG) {
  92                        process_tag((struct tag *) obj, &objects, name);
  93                        continue;
  94                }
  95                if (obj->type == OBJ_TREE) {
  96                        process_tree((struct tree *)obj, &objects, NULL, name);
  97                        continue;
  98                }
  99                if (obj->type == OBJ_BLOB) {
 100                        process_blob((struct blob *)obj, &objects, NULL, name);
 101                        continue;
 102                }
 103                die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
 104        }
 105}
 106
 107static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, char *datail, void *cb_data)
 108{
 109        struct object *object;
 110        struct rev_info *revs = (struct rev_info *)cb_data;
 111
 112        object = parse_object(osha1);
 113        if (object)
 114                add_pending_object(revs, object, "");
 115        object = parse_object(nsha1);
 116        if (object)
 117                add_pending_object(revs, object, "");
 118        return 0;
 119}
 120
 121static int add_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
 122{
 123        struct object *object = parse_object(sha1);
 124        struct rev_info *revs = (struct rev_info *)cb_data;
 125
 126        if (!object)
 127                die("bad object ref: %s:%s", path, sha1_to_hex(sha1));
 128        add_pending_object(revs, object, "");
 129
 130        return 0;
 131}
 132
 133static int add_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data)
 134{
 135        for_each_reflog_ent(path, add_one_reflog_ent, cb_data);
 136        return 0;
 137}
 138
 139static void add_one_tree(const unsigned char *sha1, struct rev_info *revs)
 140{
 141        struct tree *tree = lookup_tree(sha1);
 142        add_pending_object(revs, &tree->object, "");
 143}
 144
 145static void add_cache_tree(struct cache_tree *it, struct rev_info *revs)
 146{
 147        int i;
 148
 149        if (it->entry_count >= 0)
 150                add_one_tree(it->sha1, revs);
 151        for (i = 0; i < it->subtree_nr; i++)
 152                add_cache_tree(it->down[i]->cache_tree, revs);
 153}
 154
 155static void add_cache_refs(struct rev_info *revs)
 156{
 157        int i;
 158
 159        read_cache();
 160        for (i = 0; i < active_nr; i++) {
 161                lookup_blob(active_cache[i]->sha1);
 162                /*
 163                 * We could add the blobs to the pending list, but quite
 164                 * frankly, we don't care. Once we've looked them up, and
 165                 * added them as objects, we've really done everything
 166                 * there is to do for a blob
 167                 */
 168        }
 169        if (active_cache_tree)
 170                add_cache_tree(active_cache_tree, revs);
 171}
 172
 173void mark_reachable_objects(struct rev_info *revs, int mark_reflog)
 174{
 175        /*
 176         * Set up revision parsing, and mark us as being interested
 177         * in all object types, not just commits.
 178         */
 179        revs->tag_objects = 1;
 180        revs->blob_objects = 1;
 181        revs->tree_objects = 1;
 182
 183        /* Add all refs from the index file */
 184        add_cache_refs(revs);
 185
 186        /* Add all external refs */
 187        for_each_ref(add_one_ref, revs);
 188
 189        /* Add all reflog info from refs */
 190        if (mark_reflog)
 191                for_each_ref(add_one_reflog, revs);
 192
 193        /*
 194         * Set up the revision walk - this will move all commits
 195         * from the pending list to the commit walking list.
 196         */
 197        prepare_revision_walk(revs);
 198        walk_commit_list(revs);
 199}