diff --git a/read-tree.c b/read-tree.c
index ca808739dba4235f0f8a5777ff4bbfe4443d1d27..52f06e312ab5b8808401affed6291051d7a746d5 100644 (file)
--- a/read-tree.c
+++ b/read-tree.c
static int merge = 0;
static int update = 0;
static int index_only = 0;
+static int nontrivial_merge = 0;
+static int trivial_merges_only = 0;
+static int aggressive = 0;
static int head_idx = -1;
static int merge_size = 0;
ce->name);
}
+/* Unlink the last component and attempt to remove leading
+ * directories, in case this unlink is the removal of the
+ * last entry in the directory -- empty directories are removed.
+ */
+static void unlink_entry(char *name)
+{
+ char *cp, *prev;
+
+ if (unlink(name))
+ return;
+ prev = NULL;
+ while (1) {
+ int status;
+ cp = strrchr(name, '/');
+ if (prev)
+ *prev = '/';
+ if (!cp)
+ break;
+
+ *cp = 0;
+ status = rmdir(name);
+ if (status) {
+ *cp = '/';
+ break;
+ }
+ prev = cp;
+ }
+}
+
static void check_updates(struct cache_entry **src, int nr)
{
static struct checkout state = {
struct cache_entry *ce = *src++;
if (!ce->ce_mode) {
if (update)
- unlink(ce->name);
+ unlink_entry(ce->name);
continue;
}
if (ce->ce_flags & mask) {
{
int indpos = 0;
unsigned len = object_list_length(trees);
- struct tree_entry_list **posns =
- xmalloc(len * sizeof(struct tree_entry_list *));
+ struct tree_entry_list **posns;
int i;
struct object_list *posn = trees;
merge_size = len;
- for (i = 0; i < len; i++) {
- posns[i] = ((struct tree *) posn->item)->entries;
- posn = posn->next;
+
+ if (len) {
+ posns = xmalloc(len * sizeof(struct tree_entry_list *));
+ for (i = 0; i < len; i++) {
+ posns[i] = ((struct tree *) posn->item)->entries;
+ posn = posn->next;
+ }
+ if (unpack_trees_rec(posns, len, "", fn, &indpos))
+ return -1;
}
- if (unpack_trees_rec(posns, len, "", fn, &indpos))
- return -1;
+
+ if (trivial_merges_only && nontrivial_merge)
+ die("Merge requires file-level merging");
check_updates(active_cache, active_nr);
return 0;
return;
if (!lstat(ce->name, &st)) {
- unsigned changed = ce_match_stat(ce, &st);
+ unsigned changed = ce_match_stat(ce, &st, 1);
if (!changed)
return;
errno = 0;
int df_conflict_remote = 0;
int any_anc_missing = 0;
+ int no_anc_exists = 1;
int i;
for (i = 1; i < head_idx; i++) {
if (!stages[i])
any_anc_missing = 1;
+ else
+ no_anc_exists = 0;
}
index = stages[0];
if (!head && !remote && any_anc_missing)
return 0;
+ /* Under the new "aggressive" rule, we resolve mostly trivial
+ * cases that we historically had git-merge-one-file resolve.
+ */
+ if (aggressive) {
+ int head_deleted = !head && !df_conflict_head;
+ int remote_deleted = !remote && !df_conflict_remote;
+ /*
+ * Deleted in both.
+ * Deleted in one and unchanged in the other.
+ */
+ if ((head_deleted && remote_deleted) ||
+ (head_deleted && remote && remote_match) ||
+ (remote_deleted && head && head_match))
+ return 0;
+
+ /*
+ * Added in both, identically.
+ */
+ if (no_anc_exists && head && remote && same(head, remote))
+ return merged_entry(head, index);
+
+ }
+
/* Below are "no merge" cases, which require that the index be
* up-to-date to avoid the files getting overwritten with
* conflict resolution files.
verify_uptodate(index);
}
+ nontrivial_merge = 1;
+
/* #2, #3, #4, #6, #7, #9, #11. */
count = 0;
if (!head_match || !remote_match) {
unsigned char sha1[20];
merge_fn_t fn = NULL;
+ setup_git_directory();
+
newfd = hold_index_file_for_update(&cache_file, get_index_file());
if (newfd < 0)
die("unable to create new cachefile");
+ git_config(git_default_config);
+
merge = 0;
reset = 0;
for (i = 1; i < argc; i++) {
continue;
}
- if (!strcmp(arg, "--head")) {
- head_idx = stage - 1;
- fn = threeway_merge;
+ if (!strcmp(arg, "--trivial")) {
+ trivial_merges_only = 1;
+ continue;
+ }
+
+ if (!strcmp(arg, "--aggressive")) {
+ aggressive = 1;
+ continue;
}
/* "-m" stands for "merge", meaning we start in stage 1 */
}
if ((update||index_only) && !merge)
usage(read_tree_usage);
- if (merge && !fn) {
+
+ if (merge) {
if (stage < 2)
die("just how do you expect me to merge %d trees?", stage-1);
switch (stage - 1) {
fn = threeway_merge;
break;
}
- }
- if (head_idx < 0) {
if (stage - 1 >= 3)
head_idx = stage - 2;
else