path: root/builtin/read-tree.c
diff options
authorJunio C Hamano <>2014-07-16 18:25:40 (GMT)
committerJunio C Hamano <>2014-07-16 18:25:40 (GMT)
commit788cef81d40070d5755490441abad1a27bc120b7 (patch)
treeebc44e5c83def9855aac4559e87f201882d8f955 /builtin/read-tree.c
parente0a064a10749a8039f28e9bd3de0ffb5cf99e678 (diff)
parent3e52f70b1505956bf91cb7b107e526d1c67da0a6 (diff)
Merge branch 'nd/split-index'
An experiment to use two files (the base file and incremental changes relative to it) to represent the index to reduce I/O cost of rewriting a large index when only small part of the working tree changes. * nd/split-index: (32 commits) t1700: new tests for split-index mode t2104: make sure split index mode is off for the version test read-cache: force split index mode with GIT_TEST_SPLIT_INDEX read-tree: note about dropping split-index mode or index version read-tree: force split-index mode off on --index-output rev-parse: add --shared-index-path to get shared index path update-index --split-index: do not split if $GIT_DIR is read only update-index: new options to enable/disable split index mode split-index: strip pathname of on-disk replaced entries split-index: do not invalidate cache-tree at read time split-index: the reading part split-index: the writing part read-cache: mark updated entries for split index read-cache: save deleted entries in split index read-cache: mark new entries for split index read-cache: split-index mode read-cache: save index SHA-1 after reading entry.c: update cache_changed if refresh_cache is set in checkout_entry() cache-tree: mark istate->cache_changed on prime_cache_tree() cache-tree: mark istate->cache_changed on cache tree update ...
Diffstat (limited to 'builtin/read-tree.c')
1 files changed, 13 insertions, 5 deletions
diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index 0d7ef84..e7e1c33 100644
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -99,7 +99,7 @@ static struct lock_file lock_file;
int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
- int i, newfd, stage = 0;
+ int i, stage = 0;
unsigned char sha1[20];
struct tree_desc t[MAX_UNPACK_TREES];
struct unpack_trees_options opts;
@@ -149,12 +149,21 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
argc = parse_options(argc, argv, unused_prefix, read_tree_options,
read_tree_usage, 0);
- newfd = hold_locked_index(&lock_file, 1);
+ hold_locked_index(&lock_file, 1);
prefix_set = opts.prefix ? 1 : 0;
if (1 < opts.merge + opts.reset + prefix_set)
die("Which one? -m, --reset, or --prefix?");
+ /*
+ *
+ * The old index should be read anyway even if we're going to
+ * destroy all index entries because we still need to preserve
+ * certain information such as index version or split-index
+ * mode.
+ */
if (opts.reset || opts.merge || opts.prefix) {
if (read_cache_unmerged() && (opts.prefix || opts.merge))
die("You need to resolve your current index first");
@@ -231,10 +240,9 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
* what came from the tree.
if (nr_trees == 1 && !opts.prefix)
- prime_cache_tree(&active_cache_tree, trees[0]);
+ prime_cache_tree(&the_index, trees[0]);
- if (write_cache(newfd, active_cache, active_nr) ||
- commit_locked_index(&lock_file))
+ if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
die("unable to write new index file");
return 0;