Merge branch 'jc/unpack'
[gitweb.git] / builtin-apply.c
index 1c1d16f756d9b4b6586ca531efb2da6753f04f9a..6e0864ce27619d1153575876e2a617a392906aed 100644 (file)
@@ -28,22 +28,23 @@ static int prefix_length = -1;
 static int newfd = -1;
 
 static int p_value = 1;
-static int allow_binary_replacement = 0;
-static int check_index = 0;
-static int write_index = 0;
-static int cached = 0;
-static int diffstat = 0;
-static int numstat = 0;
-static int summary = 0;
-static int check = 0;
+static int check_index;
+static int write_index;
+static int cached;
+static int diffstat;
+static int numstat;
+static int summary;
+static int check;
 static int apply = 1;
-static int apply_in_reverse = 0;
-static int no_add = 0;
-static int show_index_info = 0;
+static int apply_in_reverse;
+static int apply_with_reject;
+static int apply_verbosely;
+static int no_add;
+static int show_index_info;
 static int line_termination = '\n';
 static unsigned long p_context = -1;
 static const char apply_usage[] =
-"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <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|error|error-all|strip>] <patch>...";
 
 static enum whitespace_eol {
        nowarn_whitespace,
@@ -51,10 +52,10 @@ static enum whitespace_eol {
        error_on_whitespace,
        strip_whitespace,
 } new_whitespace = warn_on_whitespace;
-static int whitespace_error = 0;
+static int whitespace_error;
 static int squelch_whitespace_errors = 5;
-static int applied_after_stripping = 0;
-static const char *patch_input_file = NULL;
+static int applied_after_stripping;
+static const char *patch_input_file;
 
 static void parse_whitespace_option(const char *option)
 {
@@ -122,6 +123,7 @@ struct fragment {
        unsigned long newpos, newlines;
        const char *patch;
        int size;
+       int rejected;
        struct fragment *next;
 };
 
@@ -138,6 +140,7 @@ struct patch {
        char *new_name, *old_name, *def_name;
        unsigned int old_mode, new_mode;
        int is_rename, is_copy, is_new, is_delete, is_binary;
+       int rejected;
        unsigned long deflate_origlen;
        int lines_added, lines_deleted;
        int score;
@@ -150,6 +153,24 @@ struct patch {
        struct patch *next;
 };
 
+static void say_patch_name(FILE *output, const char *pre, struct patch *patch, const char *post)
+{
+       fputs(pre, output);
+       if (patch->old_name && patch->new_name &&
+           strcmp(patch->old_name, patch->new_name)) {
+               write_name_quoted(NULL, 0, patch->old_name, 1, output);
+               fputs(" => ", output);
+               write_name_quoted(NULL, 0, patch->new_name, 1, output);
+       }
+       else {
+               const char *n = patch->new_name;
+               if (!n)
+                       n = patch->old_name;
+               write_name_quoted(NULL, 0, n, 1, output);
+       }
+       fputs(post, output);
+}
+
 #define CHUNKSIZE (8192)
 #define SLOP (16)
 
@@ -606,9 +627,7 @@ static char *git_header_name(char *line, int llen)
         * form.
         */
        for (len = 0 ; ; len++) {
-               char c = name[len];
-
-               switch (c) {
+               switch (name[len]) {
                default:
                        continue;
                case '\n':
@@ -1063,8 +1082,12 @@ static struct fragment *parse_binary_hunk(char **buf_p,
                llen = linelen(buffer, size);
                used += llen;
                linenr++;
-               if (llen == 1)
+               if (llen == 1) {
+                       /* consume the blank line */
+                       buffer++;
+                       size--;
                        break;
+               }
                /* Minimum line is "A00000\n" which is 7-byte long,
                 * and the line length must be multiple of 5 plus 2.
                 */
@@ -1107,8 +1130,7 @@ static struct fragment *parse_binary_hunk(char **buf_p,
        return frag;
 
  corrupt:
-       if (data)
-               free(data);
+       free(data);
        *status_p = -1;
        error("corrupt binary patch at line %d: %.*s",
              linenr-1, llen-1, buffer);
@@ -1205,14 +1227,12 @@ static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
                        }
                }
 
-               /* Empty patch cannot be applied if:
-                * - it is a binary patch and we do not do binary_replace, or
-                * - text patch without metadata change
+               /* Empty patch cannot be applied if it is a text patch
+                * without metadata change.  A binary patch appears
+                * empty to us here.
                 */
                if ((apply || check) &&
-                   (patch->is_binary
-                    ? !allow_binary_replacement
-                    : !metadata_changes(patch)))
+                   (!patch->is_binary && !metadata_changes(patch)))
                        die("patch with only garbage at line %d", linenr);
        }
 
@@ -1305,8 +1325,7 @@ static void show_stats(struct patch *patch)
                printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
                       len, name, patch->lines_added + patch->lines_deleted,
                       add, pluses, del, minuses);
-       if (qname)
-               free(qname);
+       free(qname);
 }
 
 static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
@@ -1544,7 +1563,8 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, i
        lines = 0;
        pos = frag->newpos;
        for (;;) {
-               offset = find_offset(buf, desc->size, oldlines, oldsize, pos, &lines);
+               offset = find_offset(buf, desc->size,
+                                    oldlines, oldsize, pos, &lines);
                if (match_end && offset + oldsize != desc->size)
                        offset = -1;
                if (match_beginning && offset)
@@ -1557,8 +1577,10 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, i
                        /* Warn if it was necessary to reduce the number
                         * of context lines.
                         */
-                       if ((leading != frag->leading) || (trailing != frag->trailing))
-                               fprintf(stderr, "Context reduced to (%ld/%ld) to apply fragment at %d\n",
+                       if ((leading != frag->leading) ||
+                           (trailing != frag->trailing))
+                               fprintf(stderr, "Context reduced to (%ld/%ld)"
+                                       " to apply fragment at %d\n",
                                        leading, trailing, pos + lines);
 
                        if (size > alloc) {
@@ -1568,7 +1590,9 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, i
                                desc->buffer = buf;
                        }
                        desc->size = size;
-                       memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize);
+                       memmove(buf + offset + newsize,
+                               buf + offset + oldsize,
+                               size - offset - newsize);
                        memcpy(buf + offset, newlines, newsize);
                        offset = 0;
 
@@ -1618,7 +1642,7 @@ static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch)
                                     "without the reverse hunk to '%s'",
                                     patch->new_name
                                     ? patch->new_name : patch->old_name);
-               fragment = fragment;
+               fragment = fragment->next;
        }
        data = (void*) fragment->patch;
        switch (fragment->binary_patch_method) {
@@ -1649,11 +1673,6 @@ static int apply_binary(struct buffer_desc *desc, struct patch *patch)
        unsigned char hdr[50];
        int hdrlen;
 
-       if (!allow_binary_replacement)
-               return error("cannot apply binary patch to '%s' "
-                            "without --allow-binary-replacement",
-                            name);
-
        /* For safety, we require patch index line to contain
         * full 40-byte textual SHA1 for old and new, at least for now.
         */
@@ -1717,7 +1736,7 @@ static int apply_binary(struct buffer_desc *desc, struct patch *patch)
                write_sha1_file_prepare(desc->buffer, desc->size, blob_type,
                                        sha1, hdr, &hdrlen);
                if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
-                       return error("binary patch to '%s' creates incorrect result", name);
+                       return error("binary patch to '%s' creates incorrect result (expecting %s, got %s)", name, patch->new_sha1_prefix, sha1_to_hex(sha1));
        }
 
        return 0;
@@ -1732,9 +1751,12 @@ static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
                return apply_binary(desc, patch);
 
        while (frag) {
-               if (apply_one_fragment(desc, frag, patch->inaccurate_eof) < 0)
-                       return error("patch failed: %s:%ld",
-                                    name, frag->oldpos);
+               if (apply_one_fragment(desc, frag, patch->inaccurate_eof)) {
+                       error("patch failed: %s:%ld", name, frag->oldpos);
+                       if (!apply_with_reject)
+                               return -1;
+                       frag->rejected = 1;
+               }
                frag = frag->next;
        }
        return 0;
@@ -1770,8 +1792,9 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
        desc.size = size;
        desc.alloc = alloc;
        desc.buffer = buf;
+
        if (apply_fragments(&desc, patch) < 0)
-               return -1;
+               return -1; /* note with --reject this succeeds. */
 
        /* NUL terminate the result */
        if (desc.alloc <= desc.size)
@@ -1796,6 +1819,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch)
        struct cache_entry *ce = NULL;
        int ok_if_exists;
 
+       patch->rejected = 1; /* we will drop this after we succeed */
        if (old_name) {
                int changed = 0;
                int stat_ret = 0;
@@ -1901,19 +1925,23 @@ static int check_patch(struct patch *patch, struct patch *prev_patch)
 
        if (apply_data(patch, &st, ce) < 0)
                return error("%s: patch does not apply", name);
+       patch->rejected = 0;
        return 0;
 }
 
 static int check_patch_list(struct patch *patch)
 {
        struct patch *prev_patch = NULL;
-       int error = 0;
+       int err = 0;
 
        for (prev_patch = NULL; patch ; patch = patch->next) {
-               error |= check_patch(patch, prev_patch);
+               if (apply_verbosely)
+                       say_patch_name(stderr,
+                                      "Checking patch ", patch, "...\n");
+               err |= check_patch(patch, prev_patch);
                prev_patch = patch;
        }
-       return error;
+       return err;
 }
 
 static void show_index_list(struct patch *list)
@@ -2219,23 +2247,99 @@ static void write_out_one_result(struct patch *patch, int phase)
        if (phase == 0)
                remove_file(patch);
        if (phase == 1)
-       create_file(patch);
+               create_file(patch);
 }
 
-static void write_out_results(struct patch *list, int skipped_patch)
+static int write_out_one_reject(struct patch *patch)
+{
+       FILE *rej;
+       char namebuf[PATH_MAX];
+       struct fragment *frag;
+       int cnt = 0;
+
+       for (cnt = 0, frag = patch->fragments; frag; frag = frag->next) {
+               if (!frag->rejected)
+                       continue;
+               cnt++;
+       }
+
+       if (!cnt) {
+               if (apply_verbosely)
+                       say_patch_name(stderr,
+                                      "Applied patch ", patch, " cleanly.\n");
+               return 0;
+       }
+
+       /* This should not happen, because a removal patch that leaves
+        * contents are marked "rejected" at the patch level.
+        */
+       if (!patch->new_name)
+               die("internal error");
+
+       /* Say this even without --verbose */
+       say_patch_name(stderr, "Applying patch ", patch, " with");
+       fprintf(stderr, " %d rejects...\n", cnt);
+
+       cnt = strlen(patch->new_name);
+       if (ARRAY_SIZE(namebuf) <= cnt + 5) {
+               cnt = ARRAY_SIZE(namebuf) - 5;
+               fprintf(stderr,
+                       "warning: truncating .rej filename to %.*s.rej",
+                       cnt - 1, patch->new_name);
+       }
+       memcpy(namebuf, patch->new_name, cnt);
+       memcpy(namebuf + cnt, ".rej", 5);
+
+       rej = fopen(namebuf, "w");
+       if (!rej)
+               return error("cannot open %s: %s", namebuf, strerror(errno));
+
+       /* Normal git tools never deal with .rej, so do not pretend
+        * this is a git patch by saying --git nor give extended
+        * headers.  While at it, maybe please "kompare" that wants
+        * the trailing TAB and some garbage at the end of line ;-).
+        */
+       fprintf(rej, "diff a/%s b/%s\t(rejected hunks)\n",
+               patch->new_name, patch->new_name);
+       for (cnt = 1, frag = patch->fragments;
+            frag;
+            cnt++, frag = frag->next) {
+               if (!frag->rejected) {
+                       fprintf(stderr, "Hunk #%d applied cleanly.\n", cnt);
+                       continue;
+               }
+               fprintf(stderr, "Rejected hunk #%d.\n", cnt);
+               fprintf(rej, "%.*s", frag->size, frag->patch);
+               if (frag->patch[frag->size-1] != '\n')
+                       fputc('\n', rej);
+       }
+       fclose(rej);
+       return -1;
+}
+
+static int write_out_results(struct patch *list, int skipped_patch)
 {
        int phase;
+       int errs = 0;
+       struct patch *l;
 
        if (!list && !skipped_patch)
-               die("No changes");
+               return error("No changes");
 
        for (phase = 0; phase < 2; phase++) {
-               struct patch *l = list;
+               l = list;
                while (l) {
-                       write_out_one_result(l, phase);
+                       if (l->rejected)
+                               errs = 1;
+                       else {
+                               write_out_one_result(l, phase);
+                               if (phase == 1 && write_out_one_reject(l))
+                                       errs = 1;
+                       }
                        l = l->next;
                }
        }
+       return errs;
 }
 
 static struct lock_file lock_file;
@@ -2310,11 +2414,13 @@ static int apply_patch(int fd, const char *filename, int inaccurate_eof)
                        die("unable to read index file");
        }
 
-       if ((check || apply) && check_patch_list(list) < 0)
+       if ((check || apply) &&
+           check_patch_list(list) < 0 &&
+           !apply_with_reject)
                exit(1);
 
-       if (apply)
-               write_out_results(list, skipped_patch);
+       if (apply && write_out_results(list, skipped_patch))
+               exit(1);
 
        if (show_index_info)
                show_index_list(list);
@@ -2335,7 +2441,7 @@ 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")) {
-               apply_default_whitespace = strdup(value);
+               apply_default_whitespace = xstrdup(value);
                return 0;
        }
        return git_default_config(var, value);
@@ -2347,6 +2453,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
        int i;
        int read_stdin = 1;
        int inaccurate_eof = 0;
+       int errs = 0;
 
        const char *whitespace_option = NULL;
 
@@ -2356,7 +2463,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                int fd;
 
                if (!strcmp(arg, "-")) {
-                       apply_patch(0, "<stdin>", inaccurate_eof);
+                       errs |= apply_patch(0, "<stdin>", inaccurate_eof);
                        read_stdin = 0;
                        continue;
                }
@@ -2382,8 +2489,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                }
                if (!strcmp(arg, "--allow-binary-replacement") ||
                    !strcmp(arg, "--binary")) {
-                       allow_binary_replacement = 1;
-                       continue;
+                       continue; /* now no-op */
                }
                if (!strcmp(arg, "--numstat")) {
                        apply = 0;
@@ -2437,6 +2543,14 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                        apply_in_reverse = 1;
                        continue;
                }
+               if (!strcmp(arg, "--reject")) {
+                       apply = apply_with_reject = apply_verbosely = 1;
+                       continue;
+               }
+               if (!strcmp(arg, "--verbose")) {
+                       apply_verbosely = 1;
+                       continue;
+               }
                if (!strcmp(arg, "--inaccurate-eof")) {
                        inaccurate_eof = 1;
                        continue;
@@ -2457,18 +2571,19 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                        usage(apply_usage);
                read_stdin = 0;
                set_default_whitespace_mode(whitespace_option);
-               apply_patch(fd, arg, inaccurate_eof);
+               errs |= apply_patch(fd, arg, inaccurate_eof);
                close(fd);
        }
        set_default_whitespace_mode(whitespace_option);
        if (read_stdin)
-               apply_patch(0, "<stdin>", inaccurate_eof);
+               errs |= apply_patch(0, "<stdin>", inaccurate_eof);
        if (whitespace_error) {
                if (squelch_whitespace_errors &&
                    squelch_whitespace_errors < whitespace_error) {
                        int squelched =
                                whitespace_error - squelch_whitespace_errors;
-                       fprintf(stderr, "warning: squelched %d whitespace error%s\n",
+                       fprintf(stderr, "warning: squelched %d "
+                               "whitespace error%s\n",
                                squelched,
                                squelched == 1 ? "" : "s");
                }
@@ -2496,5 +2611,5 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                        die("Unable to write new index file");
        }
 
-       return 0;
+       return !!errs;
 }