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-rw-r--r--read-cache.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/read-cache.c b/read-cache.c
index 44d4732b65..a7b48a94ce 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -36,6 +36,7 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
#define CACHE_EXT_RESOLVE_UNDO 0x52455543 /* "REUC" */
struct index_state the_index;
+static const char *alternate_index_output;
static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce)
{
@@ -1875,6 +1876,25 @@ static int do_write_index(struct index_state *istate, int newfd)
return 0;
}
+void set_alternate_index_output(const char *name)
+{
+ alternate_index_output = name;
+}
+
+static int commit_locked_index(struct lock_file *lk)
+{
+ if (alternate_index_output) {
+ if (lk->fd >= 0 && close_lock_file(lk))
+ return -1;
+ if (rename(lk->filename, alternate_index_output))
+ return -1;
+ lk->filename[0] = 0;
+ return 0;
+ } else {
+ return commit_lock_file(lk);
+ }
+}
+
static int do_write_locked_index(struct index_state *istate, struct lock_file *lock,
unsigned flags)
{