avoid "write_in_full(fd, buf, len) != len" pattern
[gitweb.git] / notes-merge.c
index 32caaaff7477d3640c81a19c54c1c92ffb8ca8b1..c12b354f1003a29c6faf58e7ec970e4ac761812e 100644 (file)
@@ -22,21 +22,21 @@ void init_notes_merge_options(struct notes_merge_options *o)
        o->verbosity = NOTES_MERGE_VERBOSITY_DEFAULT;
 }
 
-static int path_to_sha1(const char *path, unsigned char *sha1)
+static int path_to_oid(const char *path, struct object_id *oid)
 {
-       char hex_sha1[40];
+       char hex_oid[GIT_SHA1_HEXSZ];
        int i = 0;
-       while (*path && i < 40) {
+       while (*path && i < GIT_SHA1_HEXSZ) {
                if (*path != '/')
-                       hex_sha1[i++] = *path;
+                       hex_oid[i++] = *path;
                path++;
        }
-       if (*path || i != 40)
+       if (*path || i != GIT_SHA1_HEXSZ)
                return -1;
-       return get_sha1_hex(hex_sha1, sha1);
+       return get_oid_hex(hex_oid, oid);
 }
 
-static int verify_notes_filepair(struct diff_filepair *p, unsigned char *sha1)
+static int verify_notes_filepair(struct diff_filepair *p, struct object_id *oid)
 {
        switch (p->status) {
        case DIFF_STATUS_MODIFIED:
@@ -54,11 +54,11 @@ static int verify_notes_filepair(struct diff_filepair *p, unsigned char *sha1)
                return -1;
        }
        assert(!strcmp(p->one->path, p->two->path));
-       return path_to_sha1(p->one->path, sha1);
+       return path_to_oid(p->one->path, oid);
 }
 
 static struct notes_merge_pair *find_notes_merge_pair_pos(
-               struct notes_merge_pair *list, int len, unsigned char *obj,
+               struct notes_merge_pair *list, int len, struct object_id *obj,
                int insert_new, int *occupied)
 {
        /*
@@ -75,7 +75,7 @@ static struct notes_merge_pair *find_notes_merge_pair_pos(
        int i = last_index < len ? last_index : len - 1;
        int prev_cmp = 0, cmp = -1;
        while (i >= 0 && i < len) {
-               cmp = hashcmp(obj, list[i].obj.hash);
+               cmp = oidcmp(obj, &list[i].obj);
                if (!cmp) /* obj belongs @ i */
                        break;
                else if (cmp < 0 && prev_cmp <= 0) /* obj belongs < i */
@@ -99,8 +99,7 @@ static struct notes_merge_pair *find_notes_merge_pair_pos(
        else {
                *occupied = 0;
                if (insert_new && i < len) {
-                       memmove(list + i + 1, list + i,
-                               (len - i) * sizeof(struct notes_merge_pair));
+                       MOVE_ARRAY(list + i + 1, list + i, len - i);
                        memset(list + i, 0, sizeof(struct notes_merge_pair));
                }
        }
@@ -114,8 +113,8 @@ static struct object_id uninitialized = {
 };
 
 static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
-                                                const unsigned char *base,
-                                                const unsigned char *remote,
+                                                const struct object_id *base,
+                                                const struct object_id *remote,
                                                 int *num_changes)
 {
        struct diff_options opt;
@@ -123,13 +122,13 @@ static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
        int i, len = 0;
 
        trace_printf("\tdiff_tree_remote(base = %.7s, remote = %.7s)\n",
-              sha1_to_hex(base), sha1_to_hex(remote));
+              oid_to_hex(base), oid_to_hex(remote));
 
        diff_setup(&opt);
        DIFF_OPT_SET(&opt, RECURSIVE);
        opt.output_format = DIFF_FORMAT_NO_OUTPUT;
        diff_setup_done(&opt);
-       diff_tree_sha1(base, remote, "", &opt);
+       diff_tree_oid(base, remote, "", &opt);
        diffcore_std(&opt);
 
        changes = xcalloc(diff_queued_diff.nr, sizeof(struct notes_merge_pair));
@@ -138,19 +137,19 @@ static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
                struct diff_filepair *p = diff_queued_diff.queue[i];
                struct notes_merge_pair *mp;
                int occupied;
-               unsigned char obj[20];
+               struct object_id obj;
 
-               if (verify_notes_filepair(p, obj)) {
+               if (verify_notes_filepair(p, &obj)) {
                        trace_printf("\t\tCannot merge entry '%s' (%c): "
                               "%.7s -> %.7s. Skipping!\n", p->one->path,
                               p->status, oid_to_hex(&p->one->oid),
                               oid_to_hex(&p->two->oid));
                        continue;
                }
-               mp = find_notes_merge_pair_pos(changes, len, obj, 1, &occupied);
+               mp = find_notes_merge_pair_pos(changes, len, &obj, 1, &occupied);
                if (occupied) {
                        /* We've found an addition/deletion pair */
-                       assert(!hashcmp(mp->obj.hash, obj));
+                       assert(!oidcmp(&mp->obj, &obj));
                        if (is_null_oid(&p->one->oid)) { /* addition */
                                assert(is_null_oid(&mp->remote));
                                oidcpy(&mp->remote, &p->two->oid);
@@ -160,7 +159,7 @@ static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
                        } else
                                assert(!"Invalid existing change recorded");
                } else {
-                       hashcpy(mp->obj.hash, obj);
+                       oidcpy(&mp->obj, &obj);
                        oidcpy(&mp->base, &p->one->oid);
                        oidcpy(&mp->local, &uninitialized);
                        oidcpy(&mp->remote, &p->two->oid);
@@ -179,45 +178,45 @@ static struct notes_merge_pair *diff_tree_remote(struct notes_merge_options *o,
 
 static void diff_tree_local(struct notes_merge_options *o,
                            struct notes_merge_pair *changes, int len,
-                           const unsigned char *base,
-                           const unsigned char *local)
+                           const struct object_id *base,
+                           const struct object_id *local)
 {
        struct diff_options opt;
        int i;
 
        trace_printf("\tdiff_tree_local(len = %i, base = %.7s, local = %.7s)\n",
-              len, sha1_to_hex(base), sha1_to_hex(local));
+              len, oid_to_hex(base), oid_to_hex(local));
 
        diff_setup(&opt);
        DIFF_OPT_SET(&opt, RECURSIVE);
        opt.output_format = DIFF_FORMAT_NO_OUTPUT;
        diff_setup_done(&opt);
-       diff_tree_sha1(base, local, "", &opt);
+       diff_tree_oid(base, local, "", &opt);
        diffcore_std(&opt);
 
        for (i = 0; i < diff_queued_diff.nr; i++) {
                struct diff_filepair *p = diff_queued_diff.queue[i];
                struct notes_merge_pair *mp;
                int match;
-               unsigned char obj[20];
+               struct object_id obj;
 
-               if (verify_notes_filepair(p, obj)) {
+               if (verify_notes_filepair(p, &obj)) {
                        trace_printf("\t\tCannot merge entry '%s' (%c): "
                               "%.7s -> %.7s. Skipping!\n", p->one->path,
                               p->status, oid_to_hex(&p->one->oid),
                               oid_to_hex(&p->two->oid));
                        continue;
                }
-               mp = find_notes_merge_pair_pos(changes, len, obj, 0, &match);
+               mp = find_notes_merge_pair_pos(changes, len, &obj, 0, &match);
                if (!match) {
                        trace_printf("\t\tIgnoring local-only change for %s: "
-                              "%.7s -> %.7s\n", sha1_to_hex(obj),
+                              "%.7s -> %.7s\n", oid_to_hex(&obj),
                               oid_to_hex(&p->one->oid),
                               oid_to_hex(&p->two->oid));
                        continue;
                }
 
-               assert(!hashcmp(mp->obj.hash, obj));
+               assert(!oidcmp(&mp->obj, &obj));
                if (is_null_oid(&p->two->oid)) { /* deletion */
                        /*
                         * Either this is a true deletion (1), or it is part
@@ -292,11 +291,11 @@ static void check_notes_merge_worktree(struct notes_merge_options *o)
                    git_path(NOTES_MERGE_WORKTREE));
 }
 
-static void write_buf_to_worktree(const unsigned char *obj,
+static void write_buf_to_worktree(const struct object_id *obj,
                                  const char *buf, unsigned long size)
 {
        int fd;
-       char *path = git_pathdup(NOTES_MERGE_WORKTREE "/%s", sha1_to_hex(obj));
+       char *path = git_pathdup(NOTES_MERGE_WORKTREE "/%s", oid_to_hex(obj));
        if (safe_create_leading_directories_const(path))
                die_errno("unable to create directory for '%s'", path);
 
@@ -320,19 +319,19 @@ static void write_buf_to_worktree(const unsigned char *obj,
        free(path);
 }
 
-static void write_note_to_worktree(const unsigned char *obj,
-                                  const unsigned char *note)
+static void write_note_to_worktree(const struct object_id *obj,
+                                  const struct object_id *note)
 {
        enum object_type type;
        unsigned long size;
-       void *buf = read_sha1_file(note, &type, &size);
+       void *buf = read_sha1_file(note->hash, &type, &size);
 
        if (!buf)
                die("cannot read note %s for object %s",
-                   sha1_to_hex(note), sha1_to_hex(obj));
+                   oid_to_hex(note), oid_to_hex(obj));
        if (type != OBJ_BLOB)
                die("blob expected in note %s for object %s",
-                   sha1_to_hex(note), sha1_to_hex(obj));
+                   oid_to_hex(note), oid_to_hex(obj));
        write_buf_to_worktree(obj, buf, size);
        free(buf);
 }
@@ -358,7 +357,7 @@ static int ll_merge_in_worktree(struct notes_merge_options *o,
        if ((status < 0) || !result_buf.ptr)
                die("Failed to execute internal merge");
 
-       write_buf_to_worktree(p->obj.hash, result_buf.ptr, result_buf.size);
+       write_buf_to_worktree(&p->obj, result_buf.ptr, result_buf.size);
        free(result_buf.ptr);
 
        return status;
@@ -393,7 +392,7 @@ static int merge_one_change_manual(struct notes_merge_options *o,
                                "deleted in %s and modified in %s. Version from %s "
                                "left in tree.\n",
                                oid_to_hex(&p->obj), lref, rref, rref);
-               write_note_to_worktree(p->obj.hash, p->remote.hash);
+               write_note_to_worktree(&p->obj, &p->remote);
        } else if (is_null_oid(&p->remote)) {
                /* D/F conflict, checkout p->local */
                assert(!is_null_oid(&p->local));
@@ -402,7 +401,7 @@ static int merge_one_change_manual(struct notes_merge_options *o,
                                "deleted in %s and modified in %s. Version from %s "
                                "left in tree.\n",
                                oid_to_hex(&p->obj), rref, lref, lref);
-               write_note_to_worktree(p->obj.hash, p->local.hash);
+               write_note_to_worktree(&p->obj, &p->local);
        } else {
                /* "regular" conflict, checkout result of ll_merge() */
                const char *reason = "content";
@@ -444,14 +443,14 @@ static int merge_one_change(struct notes_merge_options *o,
                if (o->verbosity >= 2)
                        printf("Using remote notes for %s\n",
                                                oid_to_hex(&p->obj));
-               if (add_note(t, p->obj.hash, p->remote.hash, combine_notes_overwrite))
+               if (add_note(t, &p->obj, &p->remote, combine_notes_overwrite))
                        die("BUG: combine_notes_overwrite failed");
                return 0;
        case NOTES_MERGE_RESOLVE_UNION:
                if (o->verbosity >= 2)
                        printf("Concatenating local and remote notes for %s\n",
                                                        oid_to_hex(&p->obj));
-               if (add_note(t, p->obj.hash, p->remote.hash, combine_notes_concatenate))
+               if (add_note(t, &p->obj, &p->remote, combine_notes_concatenate))
                        die("failed to concatenate notes "
                            "(combine_notes_concatenate)");
                return 0;
@@ -459,7 +458,7 @@ static int merge_one_change(struct notes_merge_options *o,
                if (o->verbosity >= 2)
                        printf("Concatenating unique lines in local and remote "
                                "notes for %s\n", oid_to_hex(&p->obj));
-               if (add_note(t, p->obj.hash, p->remote.hash, combine_notes_cat_sort_uniq))
+               if (add_note(t, &p->obj, &p->remote, combine_notes_cat_sort_uniq))
                        die("failed to concatenate notes "
                            "(combine_notes_cat_sort_uniq)");
                return 0;
@@ -491,7 +490,7 @@ static int merge_changes(struct notes_merge_options *o,
                           !oidcmp(&p->local, &p->base)) {
                        /* no local change; adopt remote change */
                        trace_printf("\t\t\tno local change, adopted remote\n");
-                       if (add_note(t, p->obj.hash, p->remote.hash,
+                       if (add_note(t, &p->obj, &p->remote,
                                     combine_notes_overwrite))
                                die("BUG: combine_notes_overwrite failed");
                } else {
@@ -505,16 +504,17 @@ static int merge_changes(struct notes_merge_options *o,
 }
 
 static int merge_from_diffs(struct notes_merge_options *o,
-                           const unsigned char *base,
-                           const unsigned char *local,
-                           const unsigned char *remote, struct notes_tree *t)
+                           const struct object_id *base,
+                           const struct object_id *local,
+                           const struct object_id *remote,
+                           struct notes_tree *t)
 {
        struct notes_merge_pair *changes;
        int num_changes, conflicts;
 
        trace_printf("\tmerge_from_diffs(base = %.7s, local = %.7s, "
-              "remote = %.7s)\n", sha1_to_hex(base), sha1_to_hex(local),
-              sha1_to_hex(remote));
+              "remote = %.7s)\n", oid_to_hex(base), oid_to_hex(local),
+              oid_to_hex(remote));
 
        changes = diff_tree_remote(o, base, remote, &num_changes);
        diff_tree_local(o, changes, num_changes, base, local);
@@ -533,62 +533,62 @@ static int merge_from_diffs(struct notes_merge_options *o,
 
 int notes_merge(struct notes_merge_options *o,
                struct notes_tree *local_tree,
-               unsigned char *result_sha1)
+               struct object_id *result_oid)
 {
-       unsigned char local_sha1[20], remote_sha1[20];
+       struct object_id local_oid, remote_oid;
        struct commit *local, *remote;
        struct commit_list *bases = NULL;
-       const unsigned char *base_sha1, *base_tree_sha1;
+       const struct object_id *base_oid, *base_tree_oid;
        int result = 0;
 
        assert(o->local_ref && o->remote_ref);
        assert(!strcmp(o->local_ref, local_tree->ref));
-       hashclr(result_sha1);
+       oidclr(result_oid);
 
        trace_printf("notes_merge(o->local_ref = %s, o->remote_ref = %s)\n",
               o->local_ref, o->remote_ref);
 
        /* Dereference o->local_ref into local_sha1 */
-       if (read_ref_full(o->local_ref, 0, local_sha1, NULL))
+       if (read_ref_full(o->local_ref, 0, local_oid.hash, NULL))
                die("Failed to resolve local notes ref '%s'", o->local_ref);
        else if (!check_refname_format(o->local_ref, 0) &&
-               is_null_sha1(local_sha1))
-               local = NULL; /* local_sha1 == null_sha1 indicates unborn ref */
-       else if (!(local = lookup_commit_reference(local_sha1)))
+               is_null_oid(&local_oid))
+               local = NULL; /* local_oid == null_oid indicates unborn ref */
+       else if (!(local = lookup_commit_reference(&local_oid)))
                die("Could not parse local commit %s (%s)",
-                   sha1_to_hex(local_sha1), o->local_ref);
-       trace_printf("\tlocal commit: %.7s\n", sha1_to_hex(local_sha1));
+                   oid_to_hex(&local_oid), o->local_ref);
+       trace_printf("\tlocal commit: %.7s\n", oid_to_hex(&local_oid));
 
-       /* Dereference o->remote_ref into remote_sha1 */
-       if (get_sha1(o->remote_ref, remote_sha1)) {
+       /* Dereference o->remote_ref into remote_oid */
+       if (get_oid(o->remote_ref, &remote_oid)) {
                /*
-                * Failed to get remote_sha1. If o->remote_ref looks like an
+                * Failed to get remote_oid. If o->remote_ref looks like an
                 * unborn ref, perform the merge using an empty notes tree.
                 */
                if (!check_refname_format(o->remote_ref, 0)) {
-                       hashclr(remote_sha1);
+                       oidclr(&remote_oid);
                        remote = NULL;
                } else {
                        die("Failed to resolve remote notes ref '%s'",
                            o->remote_ref);
                }
-       } else if (!(remote = lookup_commit_reference(remote_sha1))) {
+       } else if (!(remote = lookup_commit_reference(&remote_oid))) {
                die("Could not parse remote commit %s (%s)",
-                   sha1_to_hex(remote_sha1), o->remote_ref);
+                   oid_to_hex(&remote_oid), o->remote_ref);
        }
-       trace_printf("\tremote commit: %.7s\n", sha1_to_hex(remote_sha1));
+       trace_printf("\tremote commit: %.7s\n", oid_to_hex(&remote_oid));
 
        if (!local && !remote)
                die("Cannot merge empty notes ref (%s) into empty notes ref "
                    "(%s)", o->remote_ref, o->local_ref);
        if (!local) {
                /* result == remote commit */
-               hashcpy(result_sha1, remote_sha1);
+               oidcpy(result_oid, &remote_oid);
                goto found_result;
        }
        if (!remote) {
                /* result == local commit */
-               hashcpy(result_sha1, local_sha1);
+               oidcpy(result_oid, &local_oid);
                goto found_result;
        }
        assert(local && remote);
@@ -596,48 +596,48 @@ int notes_merge(struct notes_merge_options *o,
        /* Find merge bases */
        bases = get_merge_bases(local, remote);
        if (!bases) {
-               base_sha1 = null_sha1;
-               base_tree_sha1 = EMPTY_TREE_SHA1_BIN;
+               base_oid = &null_oid;
+               base_tree_oid = &empty_tree_oid;
                if (o->verbosity >= 4)
                        printf("No merge base found; doing history-less merge\n");
        } else if (!bases->next) {
-               base_sha1 = bases->item->object.oid.hash;
-               base_tree_sha1 = bases->item->tree->object.oid.hash;
+               base_oid = &bases->item->object.oid;
+               base_tree_oid = &bases->item->tree->object.oid;
                if (o->verbosity >= 4)
                        printf("One merge base found (%.7s)\n",
-                               sha1_to_hex(base_sha1));
+                              oid_to_hex(base_oid));
        } else {
                /* TODO: How to handle multiple merge-bases? */
-               base_sha1 = bases->item->object.oid.hash;
-               base_tree_sha1 = bases->item->tree->object.oid.hash;
+               base_oid = &bases->item->object.oid;
+               base_tree_oid = &bases->item->tree->object.oid;
                if (o->verbosity >= 3)
                        printf("Multiple merge bases found. Using the first "
-                               "(%.7s)\n", sha1_to_hex(base_sha1));
+                               "(%.7s)\n", oid_to_hex(base_oid));
        }
 
        if (o->verbosity >= 4)
                printf("Merging remote commit %.7s into local commit %.7s with "
                        "merge-base %.7s\n", oid_to_hex(&remote->object.oid),
                        oid_to_hex(&local->object.oid),
-                       sha1_to_hex(base_sha1));
+                       oid_to_hex(base_oid));
 
-       if (!hashcmp(remote->object.oid.hash, base_sha1)) {
+       if (!oidcmp(&remote->object.oid, base_oid)) {
                /* Already merged; result == local commit */
                if (o->verbosity >= 2)
                        printf("Already up-to-date!\n");
-               hashcpy(result_sha1, local->object.oid.hash);
+               oidcpy(result_oid, &local->object.oid);
                goto found_result;
        }
-       if (!hashcmp(local->object.oid.hash, base_sha1)) {
+       if (!oidcmp(&local->object.oid, base_oid)) {
                /* Fast-forward; result == remote commit */
                if (o->verbosity >= 2)
                        printf("Fast-forward\n");
-               hashcpy(result_sha1, remote->object.oid.hash);
+               oidcpy(result_oid, &remote->object.oid);
                goto found_result;
        }
 
-       result = merge_from_diffs(o, base_tree_sha1, local->tree->object.oid.hash,
-                                 remote->tree->object.oid.hash, local_tree);
+       result = merge_from_diffs(o, base_tree_oid, &local->tree->object.oid,
+                                 &remote->tree->object.oid, local_tree);
 
        if (result != 0) { /* non-trivial merge (with or without conflicts) */
                /* Commit (partial) result */
@@ -646,28 +646,28 @@ int notes_merge(struct notes_merge_options *o,
                commit_list_insert(local, &parents);
                create_notes_commit(local_tree, parents,
                                    o->commit_msg.buf, o->commit_msg.len,
-                                   result_sha1);
+                                   result_oid->hash);
        }
 
 found_result:
        free_commit_list(bases);
        strbuf_release(&(o->commit_msg));
-       trace_printf("notes_merge(): result = %i, result_sha1 = %.7s\n",
-              result, sha1_to_hex(result_sha1));
+       trace_printf("notes_merge(): result = %i, result_oid = %.7s\n",
+              result, oid_to_hex(result_oid));
        return result;
 }
 
 int notes_merge_commit(struct notes_merge_options *o,
                       struct notes_tree *partial_tree,
                       struct commit *partial_commit,
-                      unsigned char *result_sha1)
+                      struct object_id *result_oid)
 {
        /*
         * Iterate through files in .git/NOTES_MERGE_WORKTREE and add all
         * found notes to 'partial_tree'. Write the updated notes tree to
         * the DB, and commit the resulting tree object while reusing the
         * commit message and parents from 'partial_commit'.
-        * Finally store the new commit object SHA1 into 'result_sha1'.
+        * Finally store the new commit object OID into 'result_oid'.
         */
        DIR *dir;
        struct dirent *e;
@@ -693,12 +693,12 @@ int notes_merge_commit(struct notes_merge_options *o,
        baselen = path.len;
        while ((e = readdir(dir)) != NULL) {
                struct stat st;
-               unsigned char obj_sha1[20], blob_sha1[20];
+               struct object_id obj_oid, blob_oid;
 
                if (is_dot_or_dotdot(e->d_name))
                        continue;
 
-               if (strlen(e->d_name) != 40 || get_sha1_hex(e->d_name, obj_sha1)) {
+               if (get_oid_hex(e->d_name, &obj_oid)) {
                        if (o->verbosity >= 3)
                                printf("Skipping non-SHA1 entry '%s%s'\n",
                                        path.buf, e->d_name);
@@ -709,23 +709,23 @@ int notes_merge_commit(struct notes_merge_options *o,
                /* write file as blob, and add to partial_tree */
                if (stat(path.buf, &st))
                        die_errno("Failed to stat '%s'", path.buf);
-               if (index_path(blob_sha1, path.buf, &st, HASH_WRITE_OBJECT))
+               if (index_path(blob_oid.hash, path.buf, &st, HASH_WRITE_OBJECT))
                        die("Failed to write blob object from '%s'", path.buf);
-               if (add_note(partial_tree, obj_sha1, blob_sha1, NULL))
+               if (add_note(partial_tree, &obj_oid, &blob_oid, NULL))
                        die("Failed to add resolved note '%s' to notes tree",
                            path.buf);
                if (o->verbosity >= 4)
                        printf("Added resolved note for object %s: %s\n",
-                               sha1_to_hex(obj_sha1), sha1_to_hex(blob_sha1));
+                               oid_to_hex(&obj_oid), oid_to_hex(&blob_oid));
                strbuf_setlen(&path, baselen);
        }
 
        create_notes_commit(partial_tree, partial_commit->parents,
-                           msg, strlen(msg), result_sha1);
+                           msg, strlen(msg), result_oid->hash);
        unuse_commit_buffer(partial_commit, buffer);
        if (o->verbosity >= 4)
                printf("Finalized notes merge commit: %s\n",
-                       sha1_to_hex(result_sha1));
+                       oid_to_hex(result_oid));
        strbuf_release(&path);
        closedir(dir);
        return 0;