Commit e1b3a2ca authored by Daniel Barkalow's avatar Daniel Barkalow Committed by Junio C Hamano

Build-in merge-recursive

This makes write_tree_from_memory(), which writes the active cache as
a tree and returns the struct tree for it, available to other code. It
also makes available merge_trees(), which does the internal merge of
two trees with a known base, and merge_recursive(), which does the
recursive internal merge of two commits with a list of common
ancestors.

The first two of these will be used by checkout -m, and the third is
presumably useful in general, although the implementation of checkout
-m which entirely matches the behavior of the shell version does not
use it (since it ignores the difference of ancestry between the old
branch and the new branch).
Signed-off-by: default avatarDaniel Barkalow <barkalow@iabervon.org>
parent 4e7c4571
......@@ -256,7 +256,6 @@ PROGRAMS = \
git-upload-pack$X \
git-pack-redundant$X git-var$X \
git-merge-tree$X git-imap-send$X \
git-merge-recursive$X \
$(EXTRA_PROGRAMS)
# Empty...
......@@ -360,6 +359,7 @@ BUILTIN_OBJS = \
builtin-merge-base.o \
builtin-merge-file.o \
builtin-merge-ours.o \
builtin-merge-recursive.o \
builtin-mv.o \
builtin-name-rev.o \
builtin-pack-objects.o \
......
......@@ -7,6 +7,7 @@
#include "cache-tree.h"
#include "commit.h"
#include "blob.h"
#include "builtin.h"
#include "tree-walk.h"
#include "diff.h"
#include "diffcore.h"
......@@ -17,6 +18,7 @@
#include "xdiff-interface.h"
#include "interpolate.h"
#include "attr.h"
#include "merge-recursive.h"
static int subtree_merge;
......@@ -232,7 +234,7 @@ static int unmerged_index(void)
return 0;
}
static struct tree *git_write_tree(void)
struct tree *write_tree_from_memory(void)
{
struct tree *result = NULL;
......@@ -1495,12 +1497,12 @@ static int process_entry(const char *path, struct stage_data *entry,
return clean_merge;
}
static int merge_trees(struct tree *head,
struct tree *merge,
struct tree *common,
const char *branch1,
const char *branch2,
struct tree **result)
int merge_trees(struct tree *head,
struct tree *merge,
struct tree *common,
const char *branch1,
const char *branch2,
struct tree **result)
{
int code, clean;
......@@ -1552,7 +1554,7 @@ static int merge_trees(struct tree *head,
clean = 1;
if (index_only)
*result = git_write_tree();
*result = write_tree_from_memory();
return clean;
}
......@@ -1572,12 +1574,12 @@ static struct commit_list *reverse_commit_list(struct commit_list *list)
* Merge the commits h1 and h2, return the resulting virtual
* commit object and a flag indicating the cleanness of the merge.
*/
static int merge(struct commit *h1,
struct commit *h2,
const char *branch1,
const char *branch2,
struct commit_list *ca,
struct commit **result)
int merge_recursive(struct commit *h1,
struct commit *h2,
const char *branch1,
const char *branch2,
struct commit_list *ca,
struct commit **result)
{
struct commit_list *iter;
struct commit *merged_common_ancestors;
......@@ -1622,11 +1624,11 @@ static int merge(struct commit *h1,
* "conflicts" were already resolved.
*/
discard_cache();
merge(merged_common_ancestors, iter->item,
"Temporary merge branch 1",
"Temporary merge branch 2",
NULL,
&merged_common_ancestors);
merge_recursive(merged_common_ancestors, iter->item,
"Temporary merge branch 1",
"Temporary merge branch 2",
NULL,
&merged_common_ancestors);
call_depth--;
if (!merged_common_ancestors)
......@@ -1695,7 +1697,7 @@ static int merge_config(const char *var, const char *value)
return git_default_config(var, value);
}
int main(int argc, char *argv[])
int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
{
static const char *bases[20];
static unsigned bases_count = 0;
......@@ -1749,7 +1751,7 @@ int main(int argc, char *argv[])
struct commit *ancestor = get_ref(bases[i]);
ca = commit_list_insert(ancestor, &ca);
}
clean = merge(h1, h2, branch1, branch2, ca, &result);
clean = merge_recursive(h1, h2, branch1, branch2, ca, &result);
if (active_cache_changed &&
(write_cache(index_fd, active_cache, active_nr) ||
......
......@@ -57,6 +57,7 @@ extern int cmd_mailsplit(int argc, const char **argv, const char *prefix);
extern int cmd_merge_base(int argc, const char **argv, const char *prefix);
extern int cmd_merge_ours(int argc, const char **argv, const char *prefix);
extern int cmd_merge_file(int argc, const char **argv, const char *prefix);
extern int cmd_merge_recursive(int argc, const char **argv, const char *prefix);
extern int cmd_mv(int argc, const char **argv, const char *prefix);
extern int cmd_name_rev(int argc, const char **argv, const char *prefix);
extern int cmd_pack_objects(int argc, const char **argv, const char *prefix);
......
......@@ -330,6 +330,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "merge-base", cmd_merge_base, RUN_SETUP },
{ "merge-file", cmd_merge_file },
{ "merge-ours", cmd_merge_ours, RUN_SETUP },
{ "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
{ "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
{ "name-rev", cmd_name_rev, RUN_SETUP },
{ "pack-objects", cmd_pack_objects, RUN_SETUP },
......
#ifndef MERGE_RECURSIVE_H
#define MERGE_RECURSIVE_H
int merge_recursive(struct commit *h1,
struct commit *h2,
const char *branch1,
const char *branch2,
struct commit_list *ancestors,
struct commit **result);
int merge_trees(struct tree *head,
struct tree *merge,
struct tree *common,
const char *branch1,
const char *branch2,
struct tree **result);
struct tree *write_tree_from_memory(void);
#endif
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