builtin-clone: rewrite guess_dir_name()
[gitweb.git] / builtin-apply.c
index 64cf8af8f6a04bb738f85f55c35d07f0b5da78ed..e15471b5b6d13eaffa6108535c067b5002a2b0c0 100644 (file)
@@ -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
@@ -45,7 +46,7 @@ static const char *fake_ancestor;
 static int line_termination = '\n';
 static unsigned long p_context = ULONG_MAX;
 static const char apply_usage[] =
-"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|fix|error|error-all>] <patch>...";
+"git apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [--reverse] [--reject] [--verbose] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|fix|error|error-all>] <patch>...";
 
 static enum ws_error_action {
        nowarn_ws_error,
@@ -57,6 +58,8 @@ static int whitespace_error;
 static int squelch_whitespace_errors = 5;
 static int applied_after_fixing_ws;
 static const char *patch_input_file;
+static const char *root;
+static int root_len;
 
 static void parse_whitespace_option(const char *option)
 {
@@ -186,6 +189,13 @@ 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;
@@ -332,6 +342,8 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                                 */
                                strbuf_remove(&name, 0, cp - name.buf);
                                free(def);
+                               if (root)
+                                       strbuf_insert(&name, 0, root, root_len);
                                return strbuf_detach(&name, NULL);
                        }
                }
@@ -370,6 +382,14 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                free(def);
        }
 
+       if (root) {
+               char *ret = xmalloc(root_len + len + 1);
+               strcpy(ret, root);
+               memcpy(ret + root_len, start, len);
+               ret[root_len + len] = '\0';
+               return ret;
+       }
+
        return xmemdupz(start, len);
 }
 
@@ -911,7 +931,7 @@ static void recount_diff(char *line, int size, struct fragment *fragment)
                        newlines++;
                        continue;
                case '\\':
-                       break;
+                       continue;
                case '@':
                        ret = size < 3 || prefixcmp(line, "@@ ");
                        break;
@@ -1030,8 +1050,7 @@ static int find_header(char *line, unsigned long size, int *hdrsize, struct patc
 static void check_whitespace(const char *line, int len, unsigned ws_rule)
 {
        char *err;
-       unsigned result = check_and_emit_line(line + 1, len - 1, ws_rule,
-           NULL, NULL, NULL, NULL);
+       unsigned result = ws_check(line + 1, len - 1, ws_rule);
        if (!result)
                return;
 
@@ -1042,7 +1061,7 @@ static void check_whitespace(const char *line, int len, unsigned ws_rule)
        else {
                err = whitespace_error_string(result);
                fprintf(stderr, "%s:%d: %s.\n%.*s\n",
-                    patch_input_file, linenr, err, len - 2, line + 1);
+                       patch_input_file, linenr, err, len - 2, line + 1);
                free(err);
        }
 }
@@ -2229,15 +2248,63 @@ 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 (!(patch->is_copy || patch->is_rename) &&
+           ((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) {
@@ -2264,6 +2331,7 @@ 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)
@@ -2308,6 +2376,7 @@ 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 = NULL;
        int stat_ret = 0;
        unsigned st_mode = 0;
 
@@ -2321,12 +2390,20 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
                return 0;
 
        assert(patch->is_new <= 0);
-       if (!cached) {
+
+       if (!(patch->is_copy || patch->is_rename) &&
+           (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)
@@ -2378,7 +2455,7 @@ 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;
@@ -2395,8 +2472,7 @@ 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
@@ -2446,15 +2522,14 @@ 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;
 }
@@ -2975,6 +3050,8 @@ static int apply_patch(int fd, const char *filename, int options)
        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);
@@ -3179,6 +3256,18 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
                        options |= RECOUNT;
                        continue;
                }
+               if (!prefixcmp(arg, "--directory=")) {
+                       arg += strlen("--directory=");
+                       root_len = strlen(arg);
+                       if (root_len && arg[root_len - 1] != '/') {
+                               char *new_root;
+                               root = new_root = xmalloc(root_len + 2);
+                               strcpy(new_root, arg);
+                               strcpy(new_root + root_len++, "/");
+                       } else
+                               root = arg;
+                       continue;
+               }
                if (0 < prefix_length)
                        arg = prefix_filename(prefix, prefix_length, arg);