apply --cached: apply a patch without using working tree.
A new flag "--cached" takes the cached data, applies the patch
and stores the result in the index, without using the working
tree.
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/apply.c b/apply.c
index 2151c96..b3b9b40 100644
--- a/apply.c
+++ b/apply.c
@@ -17,6 +17,8 @@
// --stat does just a diffstat, and doesn't actually apply
// --numstat does numeric diffstat, and doesn't actually apply
// --index-info shows the old and new index info for paths if available.
+// --index updates the cache as well.
+// --cached updates only the cache without ever touching the working tree.
//
static const char *prefix;
static int prefix_length = -1;
@@ -26,6 +28,7 @@
static int allow_binary_replacement = 0;
static int check_index = 0;
static int write_index = 0;
+static int cached = 0;
static int diffstat = 0;
static int numstat = 0;
static int summary = 0;
@@ -36,7 +39,7 @@
static int line_termination = '\n';
static unsigned long p_context = -1;
static const char apply_usage[] =
-"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
+"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
static enum whitespace_eol {
nowarn_whitespace,
@@ -1600,7 +1603,7 @@
return 0;
}
-static int apply_data(struct patch *patch, struct stat *st)
+static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
{
char *buf;
unsigned long size, alloc;
@@ -1609,7 +1612,17 @@
size = 0;
alloc = 0;
buf = NULL;
- if (patch->old_name) {
+ if (cached) {
+ if (ce) {
+ char type[20];
+ buf = read_sha1_file(ce->sha1, type, &size);
+ if (!buf)
+ return error("read of %s failed",
+ patch->old_name);
+ alloc = size;
+ }
+ }
+ else if (patch->old_name) {
size = st->st_size;
alloc = size + 8192;
buf = xmalloc(alloc);
@@ -1637,16 +1650,21 @@
const char *old_name = patch->old_name;
const char *new_name = patch->new_name;
const char *name = old_name ? old_name : new_name;
+ struct cache_entry *ce = NULL;
if (old_name) {
- int changed;
- int stat_ret = lstat(old_name, &st);
+ int changed = 0;
+ int stat_ret = 0;
+ unsigned st_mode = 0;
+ if (!cached)
+ stat_ret = lstat(old_name, &st);
if (check_index) {
int pos = cache_name_pos(old_name, strlen(old_name));
if (pos < 0)
return error("%s: does not exist in index",
old_name);
+ ce = active_cache[pos];
if (stat_ret < 0) {
struct checkout costate;
if (errno != ENOENT)
@@ -1659,37 +1677,41 @@
costate.quiet = 0;
costate.not_new = 0;
costate.refresh_cache = 1;
- if (checkout_entry(active_cache[pos],
+ if (checkout_entry(ce,
&costate,
NULL) ||
lstat(old_name, &st))
return -1;
}
-
- changed = ce_match_stat(active_cache[pos], &st, 1);
+ if (!cached)
+ changed = ce_match_stat(ce, &st, 1);
if (changed)
return error("%s: does not match index",
old_name);
+ if (cached)
+ st_mode = ntohl(ce->ce_mode);
}
else if (stat_ret < 0)
return error("%s: %s", old_name, strerror(errno));
+ if (!cached)
+ st_mode = ntohl(create_ce_mode(st.st_mode));
+
if (patch->is_new < 0)
patch->is_new = 0;
- st.st_mode = ntohl(create_ce_mode(st.st_mode));
if (!patch->old_mode)
- patch->old_mode = st.st_mode;
- if ((st.st_mode ^ patch->old_mode) & S_IFMT)
+ patch->old_mode = st_mode;
+ if ((st_mode ^ patch->old_mode) & S_IFMT)
return error("%s: wrong type", old_name);
- if (st.st_mode != patch->old_mode)
+ if (st_mode != patch->old_mode)
fprintf(stderr, "warning: %s has type %o, expected %o\n",
- old_name, st.st_mode, patch->old_mode);
+ old_name, st_mode, patch->old_mode);
}
if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0)
return error("%s: already exists in index", new_name);
- if (!lstat(new_name, &st))
+ if (!cached && !lstat(new_name, &st))
return error("%s: already exists in working directory", new_name);
if (errno != ENOENT)
return error("%s: %s", new_name, strerror(errno));
@@ -1709,9 +1731,9 @@
return error("new mode (%o) of %s does not match old mode (%o)%s%s",
patch->new_mode, new_name, patch->old_mode,
same ? "" : " of ", same ? "" : old_name);
- }
+ }
- if (apply_data(patch, &st) < 0)
+ if (apply_data(patch, &st, ce) < 0)
return error("%s: patch does not apply", name);
return 0;
}
@@ -1894,7 +1916,8 @@
if (remove_file_from_cache(patch->old_name) < 0)
die("unable to remove %s from index", patch->old_name);
}
- unlink(patch->old_name);
+ if (!cached)
+ unlink(patch->old_name);
}
static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
@@ -1911,9 +1934,11 @@
memcpy(ce->name, path, namelen);
ce->ce_mode = create_ce_mode(mode);
ce->ce_flags = htons(namelen);
- if (lstat(path, &st) < 0)
- die("unable to stat newly created file %s", path);
- fill_stat_cache_info(ce, &st);
+ if (!cached) {
+ if (lstat(path, &st) < 0)
+ die("unable to stat newly created file %s", path);
+ fill_stat_cache_info(ce, &st);
+ }
if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
die("unable to create backing store for newly created file %s", path);
if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
@@ -1950,6 +1975,8 @@
*/
static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
{
+ if (cached)
+ return;
if (!try_create_file(path, mode, buf, size))
return;
@@ -2182,6 +2209,11 @@
check_index = 1;
continue;
}
+ if (!strcmp(arg, "--cached")) {
+ check_index = 1;
+ cached = 1;
+ continue;
+ }
if (!strcmp(arg, "--apply")) {
apply = 1;
continue;
