diff options
| -rw-r--r-- | builtin-apply.c | 82 | ||||
| -rwxr-xr-x | t/t4127-apply-same-fn.sh | 85 |
2 files changed, 157 insertions, 10 deletions
diff --git a/builtin-apply.c b/builtin-apply.c index c497889312..318504a037 100644 --- a/builtin-apply.c +++ b/builtin-apply.c @@ -12,6 +12,7 @@ #include "blob.h" #include "delta.h" #include "builtin.h" +#include "path-list.h" /* * --check turns on checking that the working tree matches the @@ -185,6 +186,13 @@ struct image { struct line *line; }; +/* + * Records filenames that have been touched, in order to handle + * the case where more than one patches touch the same file. + */ + +static struct path_list fn_table; + static uint32_t hash_line(const char *cp, size_t len) { size_t i; @@ -2176,15 +2184,62 @@ static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf) return 0; } +static struct patch *in_fn_table(const char *name) +{ + struct path_list_item *item; + + if (name == NULL) + return NULL; + + item = path_list_lookup(name, &fn_table); + if (item != NULL) + return (struct patch *)item->util; + + return NULL; +} + +static void add_to_fn_table(struct patch *patch) +{ + struct path_list_item *item; + + /* + * Always add new_name unless patch is a deletion + * This should cover the cases for normal diffs, + * file creations and copies + */ + if (patch->new_name != NULL) { + item = path_list_insert(patch->new_name, &fn_table); + item->util = patch; + } + + /* + * store a failure on rename/deletion cases because + * later chunks shouldn't patch old names + */ + if ((patch->new_name == NULL) || (patch->is_rename)) { + item = path_list_insert(patch->old_name, &fn_table); + item->util = (struct patch *) -1; + } +} + static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce) { struct strbuf buf; struct image image; size_t len; char *img; + struct patch *tpatch; strbuf_init(&buf, 0); - if (cached) { + + if ((tpatch = in_fn_table(patch->old_name)) != NULL) { + if (tpatch == (struct patch *) -1) { + return error("patch %s has been renamed/deleted", + patch->old_name); + } + /* We have a patched copy in memory use that */ + strbuf_add(&buf, tpatch->result, tpatch->resultsize); + } else if (cached) { if (read_file_or_gitlink(ce, &buf)) return error("read of %s failed", patch->old_name); } else if (patch->old_name) { @@ -2211,6 +2266,7 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry * return -1; /* note with --reject this succeeds. */ patch->result = image.buf; patch->resultsize = image.len; + add_to_fn_table(patch); free(image.line_allocated); if (0 < patch->is_delete && patch->resultsize) @@ -2255,6 +2311,7 @@ static int verify_index_match(struct cache_entry *ce, struct stat *st) static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st) { const char *old_name = patch->old_name; + struct patch *tpatch; int stat_ret = 0; unsigned st_mode = 0; @@ -2268,12 +2325,17 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s return 0; assert(patch->is_new <= 0); - if (!cached) { + if ((tpatch = in_fn_table(old_name)) != NULL) { + if (tpatch == (struct patch *) -1) { + return error("%s: has been deleted/renamed", old_name); + } + st_mode = tpatch->new_mode; + } else if (!cached) { stat_ret = lstat(old_name, st); if (stat_ret && errno != ENOENT) return error("%s: %s", old_name, strerror(errno)); } - if (check_index) { + if (check_index && !tpatch) { int pos = cache_name_pos(old_name, strlen(old_name)); if (pos < 0) { if (patch->is_new < 0) @@ -2325,7 +2387,7 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s return 0; } -static int check_patch(struct patch *patch, struct patch *prev_patch) +static int check_patch(struct patch *patch) { struct stat st; const char *old_name = patch->old_name; @@ -2342,8 +2404,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) return status; old_name = patch->old_name; - if (new_name && prev_patch && 0 < prev_patch->is_delete && - !strcmp(prev_patch->old_name, new_name)) + if (in_fn_table(new_name) == (struct patch *) -1) /* * A type-change diff is always split into a patch to * delete old, immediately followed by a patch to @@ -2393,15 +2454,14 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) static int check_patch_list(struct patch *patch) { - struct patch *prev_patch = NULL; int err = 0; - for (prev_patch = NULL; patch ; patch = patch->next) { + while (patch) { if (apply_verbosely) say_patch_name(stderr, "Checking patch ", patch, "...\n"); - err |= check_patch(patch, prev_patch); - prev_patch = patch; + err |= check_patch(patch); + patch = patch->next; } return err; } @@ -2919,6 +2979,8 @@ static int apply_patch(int fd, const char *filename, int inaccurate_eof) struct patch *list = NULL, **listp = &list; int skipped_patch = 0; + /* FIXME - memory leak when using multiple patch files as inputs */ + memset(&fn_table, 0, sizeof(struct path_list)); strbuf_init(&buf, 0); patch_input_file = filename; read_patch_file(&buf, fd); diff --git a/t/t4127-apply-same-fn.sh b/t/t4127-apply-same-fn.sh new file mode 100755 index 0000000000..2a6ed77c65 --- /dev/null +++ b/t/t4127-apply-same-fn.sh @@ -0,0 +1,85 @@ +#!/bin/sh + +test_description='apply same filename' + +. ./test-lib.sh + +test_expect_success setup ' + for i in a b c d e f g h i j k l m + do + echo $i + done >same_fn && + cp same_fn other_fn && + git add same_fn other_fn && + git commit -m initial +' +test_expect_success 'apply same filename with independent changes' ' + sed -i -e "s/^d/z/" same_fn && + git diff > patch0 && + git add same_fn && + sed -i -e "s/^i/y/" same_fn && + git diff >> patch0 && + cp same_fn same_fn2 && + git reset --hard && + git-apply patch0 && + diff same_fn same_fn2 +' + +test_expect_success 'apply same filename with overlapping changes' ' + git reset --hard + sed -i -e "s/^d/z/" same_fn && + git diff > patch0 && + git add same_fn && + sed -i -e "s/^e/y/" same_fn && + git diff >> patch0 && + cp same_fn same_fn2 && + git reset --hard && + git-apply patch0 && + diff same_fn same_fn2 +' + +test_expect_success 'apply same new filename after rename' ' + git reset --hard + git mv same_fn new_fn + sed -i -e "s/^d/z/" new_fn && + git add new_fn && + git diff -M --cached > patch1 && + sed -i -e "s/^e/y/" new_fn && + git diff >> patch1 && + cp new_fn new_fn2 && + git reset --hard && + git apply --index patch1 && + diff new_fn new_fn2 +' + +test_expect_success 'apply same old filename after rename -- should fail.' ' + git reset --hard + git mv same_fn new_fn + sed -i -e "s/^d/z/" new_fn && + git add new_fn && + git diff -M --cached > patch1 && + git mv new_fn same_fn + sed -i -e "s/^e/y/" same_fn && + git diff >> patch1 && + git reset --hard && + test_must_fail git apply patch1 +' + +test_expect_success 'apply A->B (rename), C->A (rename), A->A -- should pass.' ' + git reset --hard + git mv same_fn new_fn + sed -i -e "s/^d/z/" new_fn && + git add new_fn && + git diff -M --cached > patch1 && + git commit -m "a rename" && + git mv other_fn same_fn + sed -i -e "s/^e/y/" same_fn && + git add same_fn && + git diff -M --cached >> patch1 && + sed -i -e "s/^g/x/" same_fn && + git diff >> patch1 && + git reset --hard HEAD^ && + git apply patch1 +' + +test_done |