racy-git: an empty blob has a fixed object name
[gitweb.git] / builtin-apply.c
index 5ed4e918c0873b641a2f88b08bff9c66d6c4d850..30d26e57b30821d6b11efe4f493da6d35fb1dc18 100644 (file)
@@ -1508,117 +1508,13 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
        case S_IFREG:
                if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
                        return error("unable to open or read %s", path);
-               convert_to_git(path, buf->buf, buf->len, buf);
+               convert_to_git(path, buf->buf, buf->len, buf, 0);
                return 0;
        default:
                return -1;
        }
 }
 
-static int copy_wsfix(char *output, const char *patch, int plen,
-                     unsigned ws_rule, int count_error)
-{
-       /*
-        * plen is number of bytes to be copied from patch, starting
-        * at patch.  Typically patch[plen-1] is '\n', unless this is
-        * the incomplete last line.
-        */
-       int i;
-       int add_nl_to_tail = 0;
-       int add_cr_to_tail = 0;
-       int fixed = 0;
-       int last_tab_in_indent = -1;
-       int last_space_in_indent = -1;
-       int need_fix_leading_space = 0;
-       char *buf;
-
-       /*
-        * Strip trailing whitespace
-        */
-       if ((ws_rule & WS_TRAILING_SPACE) &&
-           (2 < plen && isspace(patch[plen-2]))) {
-               if (patch[plen - 1] == '\n') {
-                       add_nl_to_tail = 1;
-                       plen--;
-                       if (1 < plen && patch[plen - 1] == '\r') {
-                               add_cr_to_tail = !!(ws_rule & WS_CR_AT_EOL);
-                               plen--;
-                       }
-               }
-               if (0 < plen && isspace(patch[plen - 1])) {
-                       while (0 < plen && isspace(patch[plen-1]))
-                               plen--;
-                       fixed = 1;
-               }
-       }
-
-       /*
-        * Check leading whitespaces (indent)
-        */
-       for (i = 0; i < plen; i++) {
-               char ch = patch[i];
-               if (ch == '\t') {
-                       last_tab_in_indent = i;
-                       if ((ws_rule & WS_SPACE_BEFORE_TAB) &&
-                           0 <= last_space_in_indent)
-                           need_fix_leading_space = 1;
-               } else if (ch == ' ') {
-                       last_space_in_indent = i;
-                       if ((ws_rule & WS_INDENT_WITH_NON_TAB) &&
-                           8 <= i - last_tab_in_indent)
-                               need_fix_leading_space = 1;
-               } else
-                       break;
-       }
-
-       buf = output;
-       if (need_fix_leading_space) {
-               /* Process indent ourselves */
-               int consecutive_spaces = 0;
-               int last = last_tab_in_indent + 1;
-
-               if (ws_rule & WS_INDENT_WITH_NON_TAB) {
-                       /* have "last" point at one past the indent */
-                       if (last_tab_in_indent < last_space_in_indent)
-                               last = last_space_in_indent + 1;
-                       else
-                               last = last_tab_in_indent + 1;
-               }
-
-               /*
-                * between patch[0..last-1], strip the funny spaces,
-                * updating them to tab as needed.
-                */
-               for (i = 0; i < last; i++) {
-                       char ch = patch[i];
-                       if (ch != ' ') {
-                               consecutive_spaces = 0;
-                               *output++ = ch;
-                       } else {
-                               consecutive_spaces++;
-                               if (consecutive_spaces == 8) {
-                                       *output++ = '\t';
-                                       consecutive_spaces = 0;
-                               }
-                       }
-               }
-               while (0 < consecutive_spaces--)
-                       *output++ = ' ';
-               plen -= last;
-               patch += last;
-               fixed = 1;
-       }
-
-       memcpy(output, patch, plen);
-       if (add_cr_to_tail)
-               output[plen++] = '\r';
-       if (add_nl_to_tail)
-               output[plen++] = '\n';
-       if (fixed && count_error)
-               applied_after_fixing_ws++;
-       return output + plen - buf;
-}
-
 static void update_pre_post_images(struct image *preimage,
                                   struct image *postimage,
                                   char *buf,
@@ -1740,14 +1636,14 @@ static int match_fragment(struct image *img,
                int match;
 
                /* Try fixing the line in the preimage */
-               fixlen = copy_wsfix(buf, orig, oldlen, ws_rule, 0);
+               fixlen = ws_fix_copy(buf, orig, oldlen, ws_rule, NULL);
 
                /* Try fixing the line in the target */
                if (sizeof(tgtfixbuf) < tgtlen)
                        tgtfix = tgtfixbuf;
                else
                        tgtfix = xmalloc(tgtlen);
-               tgtfixlen = copy_wsfix(tgtfix, target, tgtlen, ws_rule, 0);
+               tgtfixlen = ws_fix_copy(tgtfix, target, tgtlen, ws_rule, NULL);
 
                /*
                 * If they match, either the preimage was based on
@@ -2006,8 +1902,7 @@ static int apply_one_fragment(struct image *img, struct fragment *frag,
                                added = plen;
                        }
                        else {
-                               added = copy_wsfix(new, patch + 1, plen,
-                                                  ws_rule, 1);
+                               added = ws_fix_copy(new, patch + 1, plen, ws_rule, &applied_after_fixing_ws);
                        }
                        add_line_info(&postimage, new, added,
                                      (first == '+' ? 0 : LINE_COMMON));
@@ -2042,21 +1937,24 @@ static int apply_one_fragment(struct image *img, struct fragment *frag,
        trailing = frag->trailing;
 
        /*
-        * If we don't have any leading/trailing data in the patch,
-        * we want it to match at the beginning/end of the file.
+        * A hunk to change lines at the beginning would begin with
+        * @@ -1,L +N,M @@
         *
-        * But that would break if the patch is generated with
-        * --unified=0; sane people wouldn't do that to cause us
-        * trouble, but we try to please not so sane ones as well.
+        * And a hunk to add to an empty file would begin with
+        * @@ -0,0 +N,M @@
+        *
+        * In other words, a hunk that is (frag->oldpos <= 1) with or
+        * without leading context must match at the beginning.
         */
-       if (unidiff_zero) {
-               match_beginning = (!leading && !frag->oldpos);
-               match_end = 0;
-       }
-       else {
-               match_beginning = !leading && (frag->oldpos == 1);
-               match_end = !trailing;
-       }
+       match_beginning = frag->oldpos <= 1;
+
+       /*
+        * A hunk without trailing lines must match at the end.
+        * However, we simply cannot tell if a hunk must match end
+        * from the lack of trailing lines if the patch was generated
+        * with unidiff without any context.
+        */
+       match_end = !unidiff_zero && !trailing;
 
        pos = frag->newpos ? (frag->newpos - 1) : 0;
        preimage.buf = oldlines;
@@ -2276,7 +2174,7 @@ static int read_file_or_gitlink(struct cache_entry *ce, struct strbuf *buf)
        if (!ce)
                return 0;
 
-       if (S_ISGITLINK(ntohl(ce->ce_mode))) {
+       if (S_ISGITLINK(ce->ce_mode)) {
                strbuf_grow(buf, 100);
                strbuf_addf(buf, "Subproject commit %s\n", sha1_to_hex(ce->sha1));
        } else {
@@ -2361,7 +2259,7 @@ static int check_to_create_blob(const char *new_name, int ok_if_exists)
 
 static int verify_index_match(struct cache_entry *ce, struct stat *st)
 {
-       if (S_ISGITLINK(ntohl(ce->ce_mode))) {
+       if (S_ISGITLINK(ce->ce_mode)) {
                if (!S_ISDIR(st->st_mode))
                        return -1;
                return 0;
@@ -2420,12 +2318,12 @@ static int check_patch(struct patch *patch, struct patch *prev_patch)
                                return error("%s: does not match index",
                                             old_name);
                        if (cached)
-                               st_mode = ntohl(ce->ce_mode);
+                               st_mode = ce->ce_mode;
                } else if (stat_ret < 0)
                        return error("%s: %s", old_name, strerror(errno));
 
                if (!cached)
-                       st_mode = ntohl(ce_mode_from_stat(ce, st.st_mode));
+                       st_mode = ce_mode_from_stat(ce, st.st_mode);
 
                if (patch->is_new < 0)
                        patch->is_new = 0;
@@ -2726,7 +2624,7 @@ static void add_index_file(const char *path, unsigned mode, void *buf, unsigned
        ce = xcalloc(1, ce_size);
        memcpy(ce->name, path, namelen);
        ce->ce_mode = create_ce_mode(mode);
-       ce->ce_flags = htons(namelen);
+       ce->ce_flags = namelen;
        if (S_ISGITLINK(mode)) {
                const char *s = buf;
 
@@ -3084,6 +2982,8 @@ static int apply_patch(int fd, const char *filename, int inaccurate_eof)
 static int git_apply_config(const char *var, const char *value)
 {
        if (!strcmp(var, "apply.whitespace")) {
+               if (!value)
+                       return config_error_nonbool(var);
                apply_default_whitespace = xstrdup(value);
                return 0;
        }
@@ -3097,7 +2997,7 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
        int read_stdin = 1;
        int inaccurate_eof = 0;
        int errs = 0;
-       int is_not_gitdir = 0;
+       int is_not_gitdir;
 
        const char *whitespace_option = NULL;
 
@@ -3221,7 +3121,7 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
 
                fd = open(arg, O_RDONLY);
                if (fd < 0)
-                       usage(apply_usage);
+                       die("can't open patch '%s': %s", arg, strerror(errno));
                read_stdin = 0;
                set_default_whitespace_mode(whitespace_option);
                errs |= apply_patch(fd, arg, inaccurate_eof);