diff options
Diffstat (limited to 'builtin-apply.c')
| -rw-r--r-- | builtin-apply.c | 112 |
1 files changed, 79 insertions, 33 deletions
diff --git a/builtin-apply.c b/builtin-apply.c index 6e0864ce2..25e90d8d2 100644 --- a/builtin-apply.c +++ b/builtin-apply.c @@ -27,6 +27,7 @@ static const char *prefix; static int prefix_length = -1; static int newfd = -1; +static int unidiff_zero; static int p_value = 1; static int check_index; static int write_index; @@ -854,11 +855,10 @@ static int find_header(char *line, unsigned long size, int *hdrsize, struct patc } /* - * Parse a unified diff. Note that this really needs - * to parse each fragment separately, since the only - * way to know the difference between a "---" that is - * part of a patch, and a "---" that starts the next - * patch is to look at the line counts.. + * Parse a unified diff. Note that this really needs to parse each + * fragment separately, since the only way to know the difference + * between a "---" that is part of a patch, and a "---" that starts + * the next patch is to look at the line counts.. */ static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment) { @@ -875,31 +875,14 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s leading = 0; trailing = 0; - if (patch->is_new < 0) { - patch->is_new = !oldlines; - if (!oldlines) - patch->old_name = NULL; - } - if (patch->is_delete < 0) { - patch->is_delete = !newlines; - if (!newlines) - patch->new_name = NULL; - } - - if (patch->is_new && oldlines) - return error("new file depends on old contents"); - if (patch->is_delete != !newlines) { - if (newlines) - return error("deleted file still has contents"); - fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name); - } - /* Parse the thing.. */ line += len; size -= len; linenr++; added = deleted = 0; - for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) { + for (offset = len; + 0 < size; + offset += len, size -= len, line += len, linenr++) { if (!oldlines && !newlines) break; len = linelen(line, size); @@ -972,12 +955,18 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s patch->lines_added += added; patch->lines_deleted += deleted; + + if (0 < patch->is_new && oldlines) + return error("new file depends on old contents"); + if (0 < patch->is_delete && newlines) + return error("deleted file still has contents"); return offset; } static int parse_single_patch(char *line, unsigned long size, struct patch *patch) { unsigned long offset = 0; + unsigned long oldlines = 0, newlines = 0, context = 0; struct fragment **fragp = &patch->fragments; while (size > 4 && !memcmp(line, "@@ -", 4)) { @@ -988,9 +977,11 @@ static int parse_single_patch(char *line, unsigned long size, struct patch *patc len = parse_fragment(line, size, patch, fragment); if (len <= 0) die("corrupt patch at line %d", linenr); - fragment->patch = line; fragment->size = len; + oldlines += fragment->oldlines; + newlines += fragment->newlines; + context += fragment->leading + fragment->trailing; *fragp = fragment; fragp = &fragment->next; @@ -999,6 +990,46 @@ static int parse_single_patch(char *line, unsigned long size, struct patch *patc line += len; size -= len; } + + /* + * If something was removed (i.e. we have old-lines) it cannot + * be creation, and if something was added it cannot be + * deletion. However, the reverse is not true; --unified=0 + * patches that only add are not necessarily creation even + * though they do not have any old lines, and ones that only + * delete are not necessarily deletion. + * + * Unfortunately, a real creation/deletion patch do _not_ have + * any context line by definition, so we cannot safely tell it + * apart with --unified=0 insanity. At least if the patch has + * more than one hunk it is not creation or deletion. + */ + if (patch->is_new < 0 && + (oldlines || (patch->fragments && patch->fragments->next))) + patch->is_new = 0; + if (patch->is_delete < 0 && + (newlines || (patch->fragments && patch->fragments->next))) + patch->is_delete = 0; + if (!unidiff_zero || context) { + /* If the user says the patch is not generated with + * --unified=0, or if we have seen context lines, + * then not having oldlines means the patch is creation, + * and not having newlines means the patch is deletion. + */ + if (patch->is_new < 0 && !oldlines) + patch->is_new = 1; + if (patch->is_delete < 0 && !newlines) + patch->is_delete = 1; + } + + if (0 < patch->is_new && oldlines) + die("new file %s depends on old contents", patch->new_name); + if (0 < patch->is_delete && newlines) + die("deleted file %s still has contents", patch->old_name); + if (!patch->is_delete && !newlines && context) + fprintf(stderr, "** warning: file %s becomes empty but " + "is not deleted\n", patch->new_name); + return offset; } @@ -1556,9 +1587,19 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, i /* * If we don't have any leading/trailing data in the patch, * we want it to match at the beginning/end of the file. + * + * 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. */ - match_beginning = !leading && (frag->oldpos == 1); - match_end = !trailing; + if (unidiff_zero) { + match_beginning = (!leading && !frag->oldpos); + match_end = 0; + } + else { + match_beginning = !leading && (frag->oldpos == 1); + match_end = !trailing; + } lines = 0; pos = frag->newpos; @@ -1804,7 +1845,7 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry * patch->result = desc.buffer; patch->resultsize = desc.size; - if (patch->is_delete && patch->resultsize) + if (0 < patch->is_delete && patch->resultsize) return error("removal patch leaves file contents"); return 0; @@ -1876,7 +1917,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) old_name, st_mode, patch->old_mode); } - if (new_name && prev_patch && prev_patch->is_delete && + if (new_name && prev_patch && 0 < prev_patch->is_delete && !strcmp(prev_patch->old_name, new_name)) /* A type-change diff is always split into a patch to * delete old, immediately followed by a patch to @@ -1889,7 +1930,8 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) else ok_if_exists = 0; - if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) { + if (new_name && + ((0 < patch->is_new) | (0 < patch->is_rename) | patch->is_copy)) { if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0 && !ok_if_exists) @@ -1906,7 +1948,7 @@ static int check_patch(struct patch *patch, struct patch *prev_patch) return error("%s: %s", new_name, strerror(errno)); } if (!patch->new_mode) { - if (patch->is_new) + if (0 < patch->is_new) patch->new_mode = S_IFREG | 0644; else patch->new_mode = patch->old_mode; @@ -1957,7 +1999,7 @@ static void show_index_list(struct patch *list) const char *name; name = patch->old_name ? patch->old_name : patch->new_name; - if (patch->is_new) + if (0 < patch->is_new) sha1_ptr = null_sha1; else if (get_sha1(patch->old_sha1_prefix, sha1)) die("sha1 information is lacking or useless (%s).", @@ -2543,6 +2585,10 @@ int cmd_apply(int argc, const char **argv, const char *prefix) apply_in_reverse = 1; continue; } + if (!strcmp(arg, "--unidiff-zero")) { + unidiff_zero = 1; + continue; + } if (!strcmp(arg, "--reject")) { apply = apply_with_reject = apply_verbosely = 1; continue; |