зеркало из https://github.com/microsoft/git.git
Merge branch 'dz/apply-again'
* dz/apply-again: git-apply: handle a patch that touches the same path more than once better
This commit is contained in:
Junio C Hamano
Коммит
7ebd52aa0e
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@ -12,6 +12,7 @@
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#include "blob.h"
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#include "delta.h"
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#include "builtin.h"
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#include "path-list.h"
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/*
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* --check turns on checking that the working tree matches the
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@ -185,6 +186,13 @@ struct image {
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struct line *line;
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};
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/*
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* Records filenames that have been touched, in order to handle
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* the case where more than one patches touch the same file.
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*/
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static struct path_list fn_table;
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static uint32_t hash_line(const char *cp, size_t len)
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{
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size_t i;
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@ -2176,15 +2184,62 @@ static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
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return 0;
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}
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static struct patch *in_fn_table(const char *name)
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{
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struct path_list_item *item;
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if (name == NULL)
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return NULL;
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item = path_list_lookup(name, &fn_table);
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if (item != NULL)
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return (struct patch *)item->util;
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return NULL;
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}
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static void add_to_fn_table(struct patch *patch)
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{
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struct path_list_item *item;
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/*
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* Always add new_name unless patch is a deletion
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* This should cover the cases for normal diffs,
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* file creations and copies
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*/
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if (patch->new_name != NULL) {
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item = path_list_insert(patch->new_name, &fn_table);
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item->util = patch;
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}
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/*
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* store a failure on rename/deletion cases because
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* later chunks shouldn't patch old names
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*/
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if ((patch->new_name == NULL) || (patch->is_rename)) {
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item = path_list_insert(patch->old_name, &fn_table);
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item->util = (struct patch *) -1;
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}
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}
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static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
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{
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struct strbuf buf;
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struct image image;
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size_t len;
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char *img;
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struct patch *tpatch;
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strbuf_init(&buf, 0);
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if (cached) {
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if ((tpatch = in_fn_table(patch->old_name)) != NULL) {
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if (tpatch == (struct patch *) -1) {
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return error("patch %s has been renamed/deleted",
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patch->old_name);
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}
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/* We have a patched copy in memory use that */
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strbuf_add(&buf, tpatch->result, tpatch->resultsize);
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} else if (cached) {
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if (read_file_or_gitlink(ce, &buf))
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return error("read of %s failed", patch->old_name);
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} else if (patch->old_name) {
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@ -2211,6 +2266,7 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
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return -1; /* note with --reject this succeeds. */
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patch->result = image.buf;
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patch->resultsize = image.len;
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add_to_fn_table(patch);
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free(image.line_allocated);
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if (0 < patch->is_delete && patch->resultsize)
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@ -2255,6 +2311,7 @@ static int verify_index_match(struct cache_entry *ce, struct stat *st)
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static int check_preimage(struct patch *patch, struct cache_entry **ce, struct stat *st)
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{
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const char *old_name = patch->old_name;
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struct patch *tpatch;
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int stat_ret = 0;
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unsigned st_mode = 0;
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@ -2268,12 +2325,17 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
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return 0;
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assert(patch->is_new <= 0);
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if (!cached) {
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if ((tpatch = in_fn_table(old_name)) != NULL) {
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if (tpatch == (struct patch *) -1) {
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return error("%s: has been deleted/renamed", old_name);
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}
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st_mode = tpatch->new_mode;
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} else if (!cached) {
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stat_ret = lstat(old_name, st);
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if (stat_ret && errno != ENOENT)
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return error("%s: %s", old_name, strerror(errno));
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}
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if (check_index) {
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if (check_index && !tpatch) {
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int pos = cache_name_pos(old_name, strlen(old_name));
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if (pos < 0) {
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if (patch->is_new < 0)
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@ -2325,7 +2387,7 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
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return 0;
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}
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static int check_patch(struct patch *patch, struct patch *prev_patch)
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static int check_patch(struct patch *patch)
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{
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struct stat st;
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const char *old_name = patch->old_name;
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@ -2342,8 +2404,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch)
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return status;
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old_name = patch->old_name;
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if (new_name && prev_patch && 0 < prev_patch->is_delete &&
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!strcmp(prev_patch->old_name, new_name))
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if (in_fn_table(new_name) == (struct patch *) -1)
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/*
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* A type-change diff is always split into a patch to
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* delete old, immediately followed by a patch to
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@ -2393,15 +2454,14 @@ static int check_patch(struct patch *patch, struct patch *prev_patch)
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static int check_patch_list(struct patch *patch)
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{
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struct patch *prev_patch = NULL;
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int err = 0;
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for (prev_patch = NULL; patch ; patch = patch->next) {
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while (patch) {
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if (apply_verbosely)
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say_patch_name(stderr,
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"Checking patch ", patch, "...\n");
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err |= check_patch(patch, prev_patch);
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prev_patch = patch;
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err |= check_patch(patch);
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patch = patch->next;
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}
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return err;
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}
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@ -2919,6 +2979,8 @@ static int apply_patch(int fd, const char *filename, int inaccurate_eof)
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struct patch *list = NULL, **listp = &list;
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int skipped_patch = 0;
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/* FIXME - memory leak when using multiple patch files as inputs */
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memset(&fn_table, 0, sizeof(struct path_list));
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strbuf_init(&buf, 0);
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patch_input_file = filename;
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read_patch_file(&buf, fd);
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@ -0,0 +1,85 @@
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#!/bin/sh
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test_description='apply same filename'
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. ./test-lib.sh
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test_expect_success setup '
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for i in a b c d e f g h i j k l m
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do
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echo $i
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done >same_fn &&
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cp same_fn other_fn &&
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git add same_fn other_fn &&
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git commit -m initial
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'
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test_expect_success 'apply same filename with independent changes' '
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sed -i -e "s/^d/z/" same_fn &&
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git diff > patch0 &&
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git add same_fn &&
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sed -i -e "s/^i/y/" same_fn &&
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git diff >> patch0 &&
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cp same_fn same_fn2 &&
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git reset --hard &&
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git-apply patch0 &&
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diff same_fn same_fn2
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'
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test_expect_success 'apply same filename with overlapping changes' '
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git reset --hard
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sed -i -e "s/^d/z/" same_fn &&
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git diff > patch0 &&
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git add same_fn &&
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sed -i -e "s/^e/y/" same_fn &&
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git diff >> patch0 &&
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cp same_fn same_fn2 &&
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git reset --hard &&
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git-apply patch0 &&
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diff same_fn same_fn2
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'
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test_expect_success 'apply same new filename after rename' '
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git reset --hard
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git mv same_fn new_fn
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sed -i -e "s/^d/z/" new_fn &&
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git add new_fn &&
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git diff -M --cached > patch1 &&
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sed -i -e "s/^e/y/" new_fn &&
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git diff >> patch1 &&
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cp new_fn new_fn2 &&
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git reset --hard &&
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git apply --index patch1 &&
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diff new_fn new_fn2
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'
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test_expect_success 'apply same old filename after rename -- should fail.' '
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git reset --hard
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git mv same_fn new_fn
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sed -i -e "s/^d/z/" new_fn &&
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git add new_fn &&
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git diff -M --cached > patch1 &&
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git mv new_fn same_fn
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sed -i -e "s/^e/y/" same_fn &&
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git diff >> patch1 &&
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git reset --hard &&
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test_must_fail git apply patch1
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'
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test_expect_success 'apply A->B (rename), C->A (rename), A->A -- should pass.' '
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git reset --hard
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git mv same_fn new_fn
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sed -i -e "s/^d/z/" new_fn &&
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git add new_fn &&
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git diff -M --cached > patch1 &&
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git commit -m "a rename" &&
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git mv other_fn same_fn
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sed -i -e "s/^e/y/" same_fn &&
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git add same_fn &&
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git diff -M --cached >> patch1 &&
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sed -i -e "s/^g/x/" same_fn &&
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git diff >> patch1 &&
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git reset --hard HEAD^ &&
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git apply patch1
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'
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test_done
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