Imported Upstream version 2.16.0

[platform/upstream/git.git] / merge.c

diff --git a/merge.c b/merge.c
index 74ced7f..195b578 100644 (file)
--- a/merge.c
+++ b/merge.c
@@ -1,4 +1,7 @@
 #include "cache.h"
+#include "diff.h"
+#include "diffcore.h"
+#include "lockfile.h"
 #include "commit.h"
 #include "run-command.h"
 #include "resolve-undo.h"
@@ -9,11 +12,42 @@
 static const char *merge_argument(struct commit *commit)
 {
        if (commit)
-               return sha1_to_hex(commit->object.sha1);
+               return oid_to_hex(&commit->object.oid);
        else
                return EMPTY_TREE_SHA1_HEX;
 }
 
+int index_has_changes(struct strbuf *sb)
+{
+       struct object_id head;
+       int i;
+
+       if (!get_oid_tree("HEAD", &head)) {
+               struct diff_options opt;
+
+               diff_setup(&opt);
+               opt.flags.exit_with_status = 1;
+               if (!sb)
+                       opt.flags.quick = 1;
+               do_diff_cache(&head, &opt);
+               diffcore_std(&opt);
+               for (i = 0; sb && i < diff_queued_diff.nr; i++) {
+                       if (i)
+                               strbuf_addch(sb, ' ');
+                       strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path);
+               }
+               diff_flush(&opt);
+               return opt.flags.has_changes != 0;
+       } else {
+               for (i = 0; sb && i < active_nr; i++) {
+                       if (i)
+                               strbuf_addch(sb, ' ');
+                       strbuf_addstr(sb, active_cache[i]->name);
+               }
+               return !!active_nr;
+       }
+}
+
 int try_merge_command(const char *strategy, size_t xopts_nr,
                      const char **xopts, struct commit_list *common,
                      const char *head_arg, struct commit_list *remotes)
@@ -43,8 +77,8 @@ int try_merge_command(const char *strategy, size_t xopts_nr,
        return ret;
 }
 
-int checkout_fast_forward(const unsigned char *head,
-                         const unsigned char *remote,
+int checkout_fast_forward(const struct object_id *head,
+                         const struct object_id *remote,
                          int overwrite_ignore)
 {
        struct tree *trees[MAX_UNPACK_TREES];
@@ -52,11 +86,12 @@ int checkout_fast_forward(const unsigned char *head,
        struct tree_desc t[MAX_UNPACK_TREES];
        int i, nr_trees = 0;
        struct dir_struct dir;
-       struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+       struct lock_file lock_file = LOCK_INIT;
 
        refresh_cache(REFRESH_QUIET);
 
-       hold_locked_index(lock_file, 1);
+       if (hold_locked_index(&lock_file, LOCK_REPORT_ON_ERROR) < 0)
+               return -1;
 
        memset(&trees, 0, sizeof(trees));
        memset(&opts, 0, sizeof(opts));
@@ -89,7 +124,7 @@ int checkout_fast_forward(const unsigned char *head,
        }
        if (unpack_trees(nr_trees, t, &opts))
                return -1;
-       if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
-               die(_("unable to write new index file"));
+       if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+               return error(_("unable to write new index file"));
        return 0;
 }