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-rw-r--r--merge-recursive.c163
1 files changed, 114 insertions, 49 deletions
diff --git a/merge-recursive.c b/merge-recursive.c
index f5df9b961b..206c103635 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -3,6 +3,7 @@
* Fredrik Kuivinen.
* The thieves were Alex Riesen and Johannes Schindelin, in June/July 2006
*/
+#include "advice.h"
#include "cache.h"
#include "cache-tree.h"
#include "commit.h"
@@ -20,15 +21,17 @@
#include "merge-recursive.h"
#include "dir.h"
-static struct tree *shift_tree_object(struct tree *one, struct tree *two)
+static struct tree *shift_tree_object(struct tree *one, struct tree *two,
+ const char *subtree_shift)
{
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 (!*subtree_shift) {
+ shift_tree(one->object.sha1, two->object.sha1, shifted, 0);
+ } else {
+ shift_tree_by(one->object.sha1, two->object.sha1, shifted,
+ subtree_shift);
+ }
if (!hashcmp(two->object.sha1, shifted))
return two;
return lookup_tree(shifted);
@@ -38,7 +41,7 @@ static struct tree *shift_tree_object(struct tree *one, struct tree *two)
* A virtual commit has (const char *)commit->util set to the name.
*/
-struct commit *make_virtual_commit(struct tree *tree, const char *comment)
+static struct commit *make_virtual_commit(struct tree *tree, const char *comment)
{
struct commit *commit = xcalloc(1, sizeof(struct commit));
commit->tree = tree;
@@ -86,6 +89,7 @@ static void flush_output(struct merge_options *o)
}
}
+__attribute__((format (printf, 3, 4)))
static void output(struct merge_options *o, int v, const char *fmt, ...)
{
int len;
@@ -181,6 +185,7 @@ static int git_merge_trees(int index_only,
opts.fn = threeway_merge;
opts.src_index = &the_index;
opts.dst_index = &the_index;
+ opts.msgs = get_porcelain_error_msgs();
init_tree_desc_from_tree(t+0, common);
init_tree_desc_from_tree(t+1, head);
@@ -197,13 +202,14 @@ struct tree *write_tree_from_memory(struct merge_options *o)
if (unmerged_cache()) {
int i;
- output(o, 0, "There are unmerged index entries:");
+ fprintf(stderr, "BUG: There are unmerged index entries:\n");
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
if (ce_stage(ce))
- output(o, 0, "%d %.*s", ce_stage(ce), ce_namelen(ce), ce->name);
+ fprintf(stderr, "BUG: %d %.*s", ce_stage(ce),
+ (int)ce_namelen(ce), ce->name);
}
- return NULL;
+ die("Bug in merge-recursive.c");
}
if (!active_cache_tree)
@@ -403,7 +409,7 @@ static int remove_file(struct merge_options *o, int clean,
return -1;
}
if (update_working_directory) {
- if (remove_path(path) && errno != ENOENT)
+ if (remove_path(path))
return -1;
}
return 0;
@@ -438,7 +444,7 @@ static void flush_buffer(int fd, const char *buf, unsigned long size)
/* Ignore epipe */
if (errno == EPIPE)
break;
- die("merge-recursive: %s", strerror(errno));
+ die_errno("merge-recursive");
} else if (!ret) {
die("merge-recursive: disk full?");
}
@@ -554,7 +560,7 @@ static void update_file_flags(struct merge_options *o,
mode = 0666;
fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
if (fd < 0)
- die("failed to open %s: %s", path, strerror(errno));
+ die_errno("failed to open '%s'", path);
flush_buffer(fd, buf, size);
close(fd);
} else if (S_ISLNK(mode)) {
@@ -562,7 +568,7 @@ static void update_file_flags(struct merge_options *o,
safe_create_leading_directories_const(path);
unlink(path);
if (symlink(lnk, path))
- die("failed to symlink %s: %s", path, strerror(errno));
+ die_errno("failed to symlink '%s'", path);
free(lnk);
} else
die("do not know what to do with %06o %s '%s'",
@@ -593,23 +599,6 @@ struct merge_file_info
merge:1;
};
-static void fill_mm(const unsigned char *sha1, mmfile_t *mm)
-{
- unsigned long size;
- enum object_type type;
-
- if (!hashcmp(sha1, null_sha1)) {
- mm->ptr = xstrdup("");
- mm->size = 0;
- return;
- }
-
- mm->ptr = read_sha1_file(sha1, &type, &size);
- if (!mm->ptr || type != OBJ_BLOB)
- die("unable to read blob object %s", sha1_to_hex(sha1));
- mm->size = size;
-}
-
static int merge_3way(struct merge_options *o,
mmbuffer_t *result_buf,
struct diff_filespec *one,
@@ -619,19 +608,46 @@ static int merge_3way(struct merge_options *o,
const char *branch2)
{
mmfile_t orig, src1, src2;
- char *name1, *name2;
+ char *base_name, *name1, *name2;
int merge_status;
+ int favor;
+
+ if (o->call_depth)
+ favor = 0;
+ else {
+ switch (o->recursive_variant) {
+ case MERGE_RECURSIVE_OURS:
+ favor = XDL_MERGE_FAVOR_OURS;
+ break;
+ case MERGE_RECURSIVE_THEIRS:
+ favor = XDL_MERGE_FAVOR_THEIRS;
+ break;
+ default:
+ favor = 0;
+ break;
+ }
+ }
- name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
- name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
+ if (strcmp(a->path, b->path) ||
+ (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) {
+ base_name = o->ancestor == NULL ? NULL :
+ xstrdup(mkpath("%s:%s", o->ancestor, one->path));
+ name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
+ name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
+ } else {
+ base_name = o->ancestor == NULL ? NULL :
+ xstrdup(mkpath("%s", o->ancestor));
+ name1 = xstrdup(mkpath("%s", branch1));
+ name2 = xstrdup(mkpath("%s", branch2));
+ }
- fill_mm(one->sha1, &orig);
- fill_mm(a->sha1, &src1);
- fill_mm(b->sha1, &src2);
+ read_mmblob(&orig, one->sha1);
+ read_mmblob(&src1, a->sha1);
+ read_mmblob(&src2, b->sha1);
- merge_status = ll_merge(result_buf, a->path, &orig,
+ merge_status = ll_merge(result_buf, a->path, &orig, base_name,
&src1, name1, &src2, name2,
- o->call_depth);
+ (!!o->call_depth) | (favor << 1));
free(name1);
free(name2);
@@ -947,9 +963,31 @@ static int process_renames(struct merge_options *o,
"%s added in %s",
ren1_src, ren1_dst, branch1,
ren1_dst, branch2);
- new_path = unique_path(o, ren1_dst, branch2);
- output(o, 1, "Adding as %s instead", new_path);
- update_file(o, 0, dst_other.sha1, dst_other.mode, new_path);
+ if (o->call_depth) {
+ struct merge_file_info mfi;
+ struct diff_filespec one, a, b;
+
+ one.path = a.path = b.path =
+ (char *)ren1_dst;
+ hashcpy(one.sha1, null_sha1);
+ one.mode = 0;
+ hashcpy(a.sha1, ren1->pair->two->sha1);
+ a.mode = ren1->pair->two->mode;
+ hashcpy(b.sha1, dst_other.sha1);
+ b.mode = dst_other.mode;
+ mfi = merge_file(o, &one, &a, &b,
+ branch1,
+ branch2);
+ output(o, 1, "Adding merged %s", ren1_dst);
+ update_file(o, 0,
+ mfi.sha,
+ mfi.mode,
+ ren1_dst);
+ } else {
+ new_path = unique_path(o, ren1_dst, branch2);
+ output(o, 1, "Adding as %s instead", new_path);
+ update_file(o, 0, dst_other.sha1, dst_other.mode, new_path);
+ }
} else if ((item = string_list_lookup(ren1_dst, renames2Dst))) {
ren2 = item->util;
clean_merge = 0;
@@ -1140,6 +1178,28 @@ static int process_entry(struct merge_options *o,
return clean_merge;
}
+struct unpack_trees_error_msgs get_porcelain_error_msgs(void)
+{
+ struct unpack_trees_error_msgs msgs = {
+ /* would_overwrite */
+ "Your local changes to '%s' would be overwritten by merge. Aborting.",
+ /* not_uptodate_file */
+ "Your local changes to '%s' would be overwritten by merge. Aborting.",
+ /* not_uptodate_dir */
+ "Updating '%s' would lose untracked files in it. Aborting.",
+ /* would_lose_untracked */
+ "Untracked working tree file '%s' would be %s by merge. Aborting",
+ /* bind_overlap -- will not happen here */
+ NULL,
+ };
+ if (advice_commit_before_merge) {
+ msgs.would_overwrite = msgs.not_uptodate_file =
+ "Your local changes to '%s' would be overwritten by merge. Aborting.\n"
+ "Please, commit your changes or stash them before you can merge.";
+ }
+ return msgs;
+}
+
int merge_trees(struct merge_options *o,
struct tree *head,
struct tree *merge,
@@ -1148,9 +1208,9 @@ int merge_trees(struct merge_options *o,
{
int code, clean;
- if (o->subtree_merge) {
- merge = shift_tree_object(head, merge);
- common = shift_tree_object(head, common);
+ if (o->subtree_shift) {
+ merge = shift_tree_object(head, merge, o->subtree_shift);
+ common = shift_tree_object(head, common, o->subtree_shift);
}
if (sha_eq(common->object.sha1, merge->object.sha1)) {
@@ -1161,10 +1221,14 @@ int merge_trees(struct merge_options *o,
code = git_merge_trees(o->call_depth, common, head, merge);
- if (code != 0)
- die("merging of trees %s and %s failed",
- sha1_to_hex(head->object.sha1),
- sha1_to_hex(merge->object.sha1));
+ if (code != 0) {
+ if (show(o, 4) || o->call_depth)
+ die("merging of trees %s and %s failed",
+ sha1_to_hex(head->object.sha1),
+ sha1_to_hex(merge->object.sha1));
+ else
+ exit(128);
+ }
if (unmerged_cache()) {
struct string_list *entries, *re_head, *re_merge;
@@ -1283,6 +1347,7 @@ int merge_recursive(struct merge_options *o,
if (!o->call_depth)
read_cache();
+ o->ancestor = "merged common ancestors";
clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree,
&mrtree);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 10:59:51 +0000