diff options
Diffstat (limited to 'merge-recursive.c')
| -rw-r--r-- | merge-recursive.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/merge-recursive.c b/merge-recursive.c index e1aebd7..3096594 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -16,6 +16,22 @@ #include "path-list.h" #include "xdiff-interface.h" +static int subtree_merge; + +static struct tree *shift_tree_object(struct tree *one, struct tree *two) +{ + unsigned char shifted[20]; + + /* + * NEEDSWORK: this limits the recursion depth to hardcoded + * value '2' to avoid excessive overhead. + */ + shift_tree(one->object.sha1, two->object.sha1, shifted, 2); + if (!hashcmp(two->object.sha1, shifted)) + return two; + return lookup_tree(shifted); +} + /* * A virtual commit has * - (const char *)commit->util set to the name, and @@ -221,7 +237,7 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, struct cache_entry *ce; ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh); if (!ce) - return error("cache_addinfo failed: %s", strerror(cache_errno)); + return error("addinfo_cache failed for path '%s'", path); return add_cache_entry(ce, options); } @@ -1137,6 +1153,12 @@ static int merge_trees(struct tree *head, struct tree **result) { int code, clean; + + if (subtree_merge) { + merge = shift_tree_object(head, merge); + common = shift_tree_object(head, common); + } + if (sha_eq(common->object.sha1, merge->object.sha1)) { output(0, "Already uptodate!"); *result = head; @@ -1342,6 +1364,13 @@ int main(int argc, char *argv[]) struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); int index_fd; + if (argv[0]) { + int namelen = strlen(argv[0]); + if (8 < namelen && + !strcmp(argv[0] + namelen - 8, "-subtree")) + subtree_merge = 1; + } + git_config(merge_config); if (getenv("GIT_MERGE_VERBOSITY")) verbosity = strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10); @@ -1378,7 +1407,7 @@ int main(int argc, char *argv[]) if (show(3)) printf("Merging %s with %s\n", branch1, branch2); - index_fd = hold_lock_file_for_update(lock, get_index_file(), 1); + index_fd = hold_locked_index(lock, 1); for (i = 0; i < bases_count; i++) { struct commit *ancestor = get_ref(bases[i]); @@ -1388,7 +1417,7 @@ int main(int argc, char *argv[]) if (active_cache_changed && (write_cache(index_fd, active_cache, active_nr) || - close(index_fd) || commit_lock_file(lock))) + close(index_fd) || commit_locked_index(lock))) die ("unable to write %s", get_index_file()); return clean ? 0: 1; |