update-index: add a new --force-write-index option
[gitweb.git] / apply.c
diff --git a/apply.c b/apply.c
index 4050cebcfacc233f6d449221ec5c44b3551a4678..71cbbd141c73bd72778d71e1e2400413c11f492f 100644 (file)
--- a/apply.c
+++ b/apply.c
@@ -80,7 +80,6 @@ int init_apply_state(struct apply_state *state,
 {
        memset(state, 0, sizeof(*state));
        state->prefix = prefix;
-       state->prefix_length = state->prefix ? strlen(state->prefix) : 0;
        state->lock_file = lock_file;
        state->newfd = -1;
        state->apply = 1;
@@ -220,6 +219,7 @@ struct patch {
        unsigned int recount:1;
        unsigned int conflicted_threeway:1;
        unsigned int direct_to_threeway:1;
+       unsigned int crlf_in_old:1;
        struct fragment *fragments;
        char *result;
        size_t resultsize;
@@ -786,11 +786,11 @@ static int guess_p_value(struct apply_state *state, const char *nameline)
                 * Does it begin with "a/$our-prefix" and such?  Then this is
                 * very likely to apply to our directory.
                 */
-               if (!strncmp(name, state->prefix, state->prefix_length))
+               if (starts_with(name, state->prefix))
                        val = count_slashes(state->prefix);
                else {
                        cp++;
-                       if (!strncmp(cp, state->prefix, state->prefix_length))
+                       if (starts_with(cp, state->prefix))
                                val = count_slashes(state->prefix) + 1;
                }
        }
@@ -812,16 +812,13 @@ static int has_epoch_timestamp(const char *nameline)
         * 1970-01-01, and the seconds part must be "00".
         */
        const char stamp_regexp[] =
-               "^(1969-12-31|1970-01-01)"
-               " "
-               "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?"
+               "^[0-2][0-9]:([0-5][0-9]):00(\\.0+)?"
                " "
                "([-+][0-2][0-9]:?[0-5][0-9])\n";
        const char *timestamp = NULL, *cp, *colon;
        static regex_t *stamp;
        regmatch_t m[10];
-       int zoneoffset;
-       int hourminute;
+       int zoneoffset, epoch_hour, hour, minute;
        int status;
 
        for (cp = nameline; *cp != '\n'; cp++) {
@@ -830,6 +827,18 @@ static int has_epoch_timestamp(const char *nameline)
        }
        if (!timestamp)
                return 0;
+
+       /*
+        * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
+        * (west of GMT) or 1970-01-01 (east of GMT)
+        */
+       if (skip_prefix(timestamp, "1969-12-31 ", &timestamp))
+               epoch_hour = 24;
+       else if (skip_prefix(timestamp, "1970-01-01 ", &timestamp))
+               epoch_hour = 0;
+       else
+               return 0;
+
        if (!stamp) {
                stamp = xmalloc(sizeof(*stamp));
                if (regcomp(stamp, stamp_regexp, REG_EXTENDED)) {
@@ -847,6 +856,9 @@ static int has_epoch_timestamp(const char *nameline)
                return 0;
        }
 
+       hour = strtol(timestamp, NULL, 10);
+       minute = strtol(timestamp + m[1].rm_so, NULL, 10);
+
        zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10);
        if (*colon == ':')
                zoneoffset = zoneoffset * 60 + strtol(colon + 1, NULL, 10);
@@ -855,20 +867,7 @@ static int has_epoch_timestamp(const char *nameline)
        if (timestamp[m[3].rm_so] == '-')
                zoneoffset = -zoneoffset;
 
-       /*
-        * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
-        * (west of GMT) or 1970-01-01 (east of GMT)
-        */
-       if ((zoneoffset < 0 && memcmp(timestamp, "1969-12-31", 10)) ||
-           (0 <= zoneoffset && memcmp(timestamp, "1970-01-01", 10)))
-               return 0;
-
-       hourminute = (strtol(timestamp + 11, NULL, 10) * 60 +
-                     strtol(timestamp + 14, NULL, 10) -
-                     zoneoffset);
-
-       return ((zoneoffset < 0 && hourminute == 1440) ||
-               (0 <= zoneoffset && !hourminute));
+       return hour * 60 + minute - zoneoffset == epoch_hour * 60;
 }
 
 /*
@@ -962,13 +961,12 @@ static int gitdiff_verify_name(struct apply_state *state,
        }
 
        if (*name) {
-               int len = strlen(*name);
                char *another;
                if (isnull)
                        return error(_("git apply: bad git-diff - expected /dev/null, got %s on line %d"),
                                     *name, state->linenr);
                another = find_name(state, line, NULL, state->p_value, TERM_TAB);
-               if (!another || memcmp(another, *name, len + 1)) {
+               if (!another || strcmp(another, *name)) {
                        free(another);
                        return error((side == DIFF_NEW_NAME) ?
                            _("git apply: bad git-diff - inconsistent new filename on line %d") :
@@ -1663,6 +1661,19 @@ static void check_whitespace(struct apply_state *state,
        record_ws_error(state, result, line + 1, len - 2, state->linenr);
 }
 
+/*
+ * Check if the patch has context lines with CRLF or
+ * the patch wants to remove lines with CRLF.
+ */
+static void check_old_for_crlf(struct patch *patch, const char *line, int len)
+{
+       if (len >= 2 && line[len-1] == '\n' && line[len-2] == '\r') {
+               patch->ws_rule |= WS_CR_AT_EOL;
+               patch->crlf_in_old = 1;
+       }
+}
+
+
 /*
  * Parse a unified diff. Note that this really needs to parse each
  * fragment separately, since the only way to know the difference
@@ -1713,11 +1724,14 @@ static int parse_fragment(struct apply_state *state,
                        if (!deleted && !added)
                                leading++;
                        trailing++;
+                       check_old_for_crlf(patch, line, len);
                        if (!state->apply_in_reverse &&
                            state->ws_error_action == correct_ws_error)
                                check_whitespace(state, line, len, patch->ws_rule);
                        break;
                case '-':
+                       if (!state->apply_in_reverse)
+                               check_old_for_crlf(patch, line, len);
                        if (state->apply_in_reverse &&
                            state->ws_error_action != nowarn_ws_error)
                                check_whitespace(state, line, len, patch->ws_rule);
@@ -1726,6 +1740,8 @@ static int parse_fragment(struct apply_state *state,
                        trailing = 0;
                        break;
                case '+':
+                       if (state->apply_in_reverse)
+                               check_old_for_crlf(patch, line, len);
                        if (!state->apply_in_reverse &&
                            state->ws_error_action != nowarn_ws_error)
                                check_whitespace(state, line, len, patch->ws_rule);
@@ -2090,10 +2106,9 @@ static int use_patch(struct apply_state *state, struct patch *p)
        int i;
 
        /* Paths outside are not touched regardless of "--include" */
-       if (0 < state->prefix_length) {
-               int pathlen = strlen(pathname);
-               if (pathlen <= state->prefix_length ||
-                   memcmp(state->prefix, pathname, state->prefix_length))
+       if (state->prefix && *state->prefix) {
+               const char *rest;
+               if (!skip_prefix(pathname, state->prefix, &rest) || !*rest)
                        return 0;
        }
 
@@ -2269,8 +2284,11 @@ static void show_stats(struct apply_state *state, struct patch *patch)
                add, pluses, del, minuses);
 }
 
-static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
+static int read_old_data(struct stat *st, struct patch *patch,
+                        const char *path, struct strbuf *buf)
 {
+       enum safe_crlf safe_crlf = patch->crlf_in_old ?
+               SAFE_CRLF_KEEP_CRLF : SAFE_CRLF_RENORMALIZE;
        switch (st->st_mode & S_IFMT) {
        case S_IFLNK:
                if (strbuf_readlink(buf, path, st->st_size) < 0)
@@ -2279,7 +2297,15 @@ 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(&the_index, path, buf->buf, buf->len, buf, 0);
+               /*
+                * "git apply" without "--index/--cached" should never look
+                * at the index; the target file may not have been added to
+                * the index yet, and we may not even be in any Git repository.
+                * Pass NULL to convert_to_git() to stress this; the function
+                * should never look at the index when explicit crlf option
+                * is given.
+                */
+               convert_to_git(NULL, path, buf->buf, buf->len, buf, safe_crlf);
                return 0;
        default:
                return -1;
@@ -2810,13 +2836,10 @@ static void update_image(struct apply_state *state,
                img->line_allocated = img->line;
        }
        if (preimage_limit != postimage->nr)
-               memmove(img->line + applied_pos + postimage->nr,
-                       img->line + applied_pos + preimage_limit,
-                       (img->nr - (applied_pos + preimage_limit)) *
-                       sizeof(*img->line));
-       memcpy(img->line + applied_pos,
-              postimage->line,
-              postimage->nr * sizeof(*img->line));
+               MOVE_ARRAY(img->line + applied_pos + postimage->nr,
+                          img->line + applied_pos + preimage_limit,
+                          img->nr - (applied_pos + preimage_limit));
+       COPY_ARRAY(img->line + applied_pos, postimage->line, postimage->nr);
        if (!state->allow_overlap)
                for (i = 0; i < postimage->nr; i++)
                        img->line[applied_pos + i].flag |= LINE_PATCHED;
@@ -3385,6 +3408,7 @@ static int load_patch_target(struct apply_state *state,
                             struct strbuf *buf,
                             const struct cache_entry *ce,
                             struct stat *st,
+                            struct patch *patch,
                             const char *name,
                             unsigned expected_mode)
 {
@@ -3400,7 +3424,7 @@ static int load_patch_target(struct apply_state *state,
                } else if (has_symlink_leading_path(name, strlen(name))) {
                        return error(_("reading from '%s' beyond a symbolic link"), name);
                } else {
-                       if (read_old_data(st, name, buf))
+                       if (read_old_data(st, patch, name, buf))
                                return error(_("failed to read %s"), name);
                }
        }
@@ -3433,7 +3457,7 @@ static int load_preimage(struct apply_state *state,
                /* We have a patched copy in memory; use that. */
                strbuf_add(&buf, previous->result, previous->resultsize);
        } else {
-               status = load_patch_target(state, &buf, ce, st,
+               status = load_patch_target(state, &buf, ce, st, patch,
                                           patch->old_name, patch->old_mode);
                if (status < 0)
                        return status;
@@ -3521,7 +3545,7 @@ static int load_current(struct apply_state *state,
        if (verify_index_match(ce, &st))
                return error(_("%s: does not match index"), name);
 
-       status = load_patch_target(state, &buf, ce, &st, name, mode);
+       status = load_patch_target(state, &buf, ce, &st, patch, name, mode);
        if (status < 0)
                return status;
        else if (status)
@@ -3552,7 +3576,7 @@ static int try_threeway(struct apply_state *state,
        /* Preimage the patch was prepared for */
        if (patch->is_new)
                write_sha1_file("", 0, blob_type, pre_oid.hash);
-       else if (get_sha1(patch->old_sha1_prefix, pre_oid.hash) ||
+       else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
                 read_blob_object(&buf, &pre_oid, patch->old_mode))
                return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
 
@@ -4076,7 +4100,7 @@ static int build_fake_ancestor(struct apply_state *state, struct patch *list)
                        else
                                return error(_("sha1 information is lacking or "
                                               "useless for submodule %s"), name);
-               } else if (!get_sha1_blob(patch->old_sha1_prefix, oid.hash)) {
+               } else if (!get_oid_blob(patch->old_sha1_prefix, &oid)) {
                        ; /* ok */
                } else if (!patch->lines_added && !patch->lines_deleted) {
                        /* mode-only change: update the current */