| /* |
| * "git fast-export" builtin command |
| * |
| * Copyright (C) 2007 Johannes E. Schindelin |
| */ |
| #include "builtin.h" |
| #include "cache.h" |
| #include "commit.h" |
| #include "object.h" |
| #include "tag.h" |
| #include "diff.h" |
| #include "diffcore.h" |
| #include "log-tree.h" |
| #include "revision.h" |
| #include "decorate.h" |
| #include "string-list.h" |
| #include "utf8.h" |
| #include "parse-options.h" |
| #include "quote.h" |
| |
| static const char *fast_export_usage[] = { |
| "git fast-export [rev-list-opts]", |
| NULL |
| }; |
| |
| static int progress; |
| static enum { ABORT, VERBATIM, WARN, STRIP } signed_tag_mode = ABORT; |
| static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ERROR; |
| static int fake_missing_tagger; |
| static int use_done_feature; |
| static int no_data; |
| static int full_tree; |
| |
| static int parse_opt_signed_tag_mode(const struct option *opt, |
| const char *arg, int unset) |
| { |
| if (unset || !strcmp(arg, "abort")) |
| signed_tag_mode = ABORT; |
| else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore")) |
| signed_tag_mode = VERBATIM; |
| else if (!strcmp(arg, "warn")) |
| signed_tag_mode = WARN; |
| else if (!strcmp(arg, "strip")) |
| signed_tag_mode = STRIP; |
| else |
| return error("Unknown signed-tag mode: %s", arg); |
| return 0; |
| } |
| |
| static int parse_opt_tag_of_filtered_mode(const struct option *opt, |
| const char *arg, int unset) |
| { |
| if (unset || !strcmp(arg, "abort")) |
| tag_of_filtered_mode = ERROR; |
| else if (!strcmp(arg, "drop")) |
| tag_of_filtered_mode = DROP; |
| else if (!strcmp(arg, "rewrite")) |
| tag_of_filtered_mode = REWRITE; |
| else |
| return error("Unknown tag-of-filtered mode: %s", arg); |
| return 0; |
| } |
| |
| static struct decoration idnums; |
| static uint32_t last_idnum; |
| |
| static int has_unshown_parent(struct commit *commit) |
| { |
| struct commit_list *parent; |
| |
| for (parent = commit->parents; parent; parent = parent->next) |
| if (!(parent->item->object.flags & SHOWN) && |
| !(parent->item->object.flags & UNINTERESTING)) |
| return 1; |
| return 0; |
| } |
| |
| /* Since intptr_t is C99, we do not use it here */ |
| static inline uint32_t *mark_to_ptr(uint32_t mark) |
| { |
| return ((uint32_t *)NULL) + mark; |
| } |
| |
| static inline uint32_t ptr_to_mark(void * mark) |
| { |
| return (uint32_t *)mark - (uint32_t *)NULL; |
| } |
| |
| static inline void mark_object(struct object *object, uint32_t mark) |
| { |
| add_decoration(&idnums, object, mark_to_ptr(mark)); |
| } |
| |
| static inline void mark_next_object(struct object *object) |
| { |
| mark_object(object, ++last_idnum); |
| } |
| |
| static int get_object_mark(struct object *object) |
| { |
| void *decoration = lookup_decoration(&idnums, object); |
| if (!decoration) |
| return 0; |
| return ptr_to_mark(decoration); |
| } |
| |
| static void show_progress(void) |
| { |
| static int counter = 0; |
| if (!progress) |
| return; |
| if ((++counter % progress) == 0) |
| printf("progress %d objects\n", counter); |
| } |
| |
| static void handle_object(const unsigned char *sha1) |
| { |
| unsigned long size; |
| enum object_type type; |
| char *buf; |
| struct object *object; |
| |
| if (no_data) |
| return; |
| |
| if (is_null_sha1(sha1)) |
| return; |
| |
| object = parse_object(sha1); |
| if (!object) |
| die ("Could not read blob %s", sha1_to_hex(sha1)); |
| |
| if (object->flags & SHOWN) |
| return; |
| |
| buf = read_sha1_file(sha1, &type, &size); |
| if (!buf) |
| die ("Could not read blob %s", sha1_to_hex(sha1)); |
| |
| mark_next_object(object); |
| |
| printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size); |
| if (size && fwrite(buf, size, 1, stdout) != 1) |
| die_errno ("Could not write blob '%s'", sha1_to_hex(sha1)); |
| printf("\n"); |
| |
| show_progress(); |
| |
| object->flags |= SHOWN; |
| free(buf); |
| } |
| |
| static int depth_first(const void *a_, const void *b_) |
| { |
| const struct diff_filepair *a = *((const struct diff_filepair **)a_); |
| const struct diff_filepair *b = *((const struct diff_filepair **)b_); |
| const char *name_a, *name_b; |
| int len_a, len_b, len; |
| int cmp; |
| |
| name_a = a->one ? a->one->path : a->two->path; |
| name_b = b->one ? b->one->path : b->two->path; |
| |
| len_a = strlen(name_a); |
| len_b = strlen(name_b); |
| len = (len_a < len_b) ? len_a : len_b; |
| |
| /* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */ |
| cmp = memcmp(name_a, name_b, len); |
| if (cmp) |
| return cmp; |
| cmp = len_b - len_a; |
| if (cmp) |
| return cmp; |
| /* |
| * Move 'R'ename entries last so that all references of the file |
| * appear in the output before it is renamed (e.g., when a file |
| * was copied and renamed in the same commit). |
| */ |
| return (a->status == 'R') - (b->status == 'R'); |
| } |
| |
| static void print_path(const char *path) |
| { |
| int need_quote = quote_c_style(path, NULL, NULL, 0); |
| if (need_quote) |
| quote_c_style(path, NULL, stdout, 0); |
| else if (strchr(path, ' ')) |
| printf("\"%s\"", path); |
| else |
| printf("%s", path); |
| } |
| |
| static void show_filemodify(struct diff_queue_struct *q, |
| struct diff_options *options, void *data) |
| { |
| int i; |
| |
| /* |
| * Handle files below a directory first, in case they are all deleted |
| * and the directory changes to a file or symlink. |
| */ |
| qsort(q->queue, q->nr, sizeof(q->queue[0]), depth_first); |
| |
| for (i = 0; i < q->nr; i++) { |
| struct diff_filespec *ospec = q->queue[i]->one; |
| struct diff_filespec *spec = q->queue[i]->two; |
| |
| switch (q->queue[i]->status) { |
| case DIFF_STATUS_DELETED: |
| printf("D "); |
| print_path(spec->path); |
| putchar('\n'); |
| break; |
| |
| case DIFF_STATUS_COPIED: |
| case DIFF_STATUS_RENAMED: |
| printf("%c ", q->queue[i]->status); |
| print_path(ospec->path); |
| putchar(' '); |
| print_path(spec->path); |
| putchar('\n'); |
| |
| if (!hashcmp(ospec->sha1, spec->sha1) && |
| ospec->mode == spec->mode) |
| break; |
| /* fallthrough */ |
| |
| case DIFF_STATUS_TYPE_CHANGED: |
| case DIFF_STATUS_MODIFIED: |
| case DIFF_STATUS_ADDED: |
| /* |
| * Links refer to objects in another repositories; |
| * output the SHA-1 verbatim. |
| */ |
| if (no_data || S_ISGITLINK(spec->mode)) |
| printf("M %06o %s ", spec->mode, |
| sha1_to_hex(spec->sha1)); |
| else { |
| struct object *object = lookup_object(spec->sha1); |
| printf("M %06o :%d ", spec->mode, |
| get_object_mark(object)); |
| } |
| print_path(spec->path); |
| putchar('\n'); |
| break; |
| |
| default: |
| die("Unexpected comparison status '%c' for %s, %s", |
| q->queue[i]->status, |
| ospec->path ? ospec->path : "none", |
| spec->path ? spec->path : "none"); |
| } |
| } |
| } |
| |
| static const char *find_encoding(const char *begin, const char *end) |
| { |
| const char *needle = "\nencoding "; |
| char *bol, *eol; |
| |
| bol = memmem(begin, end ? end - begin : strlen(begin), |
| needle, strlen(needle)); |
| if (!bol) |
| return git_commit_encoding; |
| bol += strlen(needle); |
| eol = strchrnul(bol, '\n'); |
| *eol = '\0'; |
| return bol; |
| } |
| |
| static void handle_commit(struct commit *commit, struct rev_info *rev) |
| { |
| int saved_output_format = rev->diffopt.output_format; |
| const char *author, *author_end, *committer, *committer_end; |
| const char *encoding, *message; |
| char *reencoded = NULL; |
| struct commit_list *p; |
| int i; |
| |
| rev->diffopt.output_format = DIFF_FORMAT_CALLBACK; |
| |
| parse_commit(commit); |
| author = strstr(commit->buffer, "\nauthor "); |
| if (!author) |
| die ("Could not find author in commit %s", |
| sha1_to_hex(commit->object.sha1)); |
| author++; |
| author_end = strchrnul(author, '\n'); |
| committer = strstr(author_end, "\ncommitter "); |
| if (!committer) |
| die ("Could not find committer in commit %s", |
| sha1_to_hex(commit->object.sha1)); |
| committer++; |
| committer_end = strchrnul(committer, '\n'); |
| message = strstr(committer_end, "\n\n"); |
| encoding = find_encoding(committer_end, message); |
| if (message) |
| message += 2; |
| |
| if (commit->parents && |
| get_object_mark(&commit->parents->item->object) != 0 && |
| !full_tree) { |
| parse_commit(commit->parents->item); |
| diff_tree_sha1(commit->parents->item->tree->object.sha1, |
| commit->tree->object.sha1, "", &rev->diffopt); |
| } |
| else |
| diff_root_tree_sha1(commit->tree->object.sha1, |
| "", &rev->diffopt); |
| |
| /* Export the referenced blobs, and remember the marks. */ |
| for (i = 0; i < diff_queued_diff.nr; i++) |
| if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode)) |
| handle_object(diff_queued_diff.queue[i]->two->sha1); |
| |
| mark_next_object(&commit->object); |
| if (!is_encoding_utf8(encoding)) |
| reencoded = reencode_string(message, "UTF-8", encoding); |
| if (!commit->parents) |
| printf("reset %s\n", (const char*)commit->util); |
| printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s", |
| (const char *)commit->util, last_idnum, |
| (int)(author_end - author), author, |
| (int)(committer_end - committer), committer, |
| (unsigned)(reencoded |
| ? strlen(reencoded) : message |
| ? strlen(message) : 0), |
| reencoded ? reencoded : message ? message : ""); |
| free(reencoded); |
| |
| for (i = 0, p = commit->parents; p; p = p->next) { |
| int mark = get_object_mark(&p->item->object); |
| if (!mark) |
| continue; |
| if (i == 0) |
| printf("from :%d\n", mark); |
| else |
| printf("merge :%d\n", mark); |
| i++; |
| } |
| |
| if (full_tree) |
| printf("deleteall\n"); |
| log_tree_diff_flush(rev); |
| rev->diffopt.output_format = saved_output_format; |
| |
| printf("\n"); |
| |
| show_progress(); |
| } |
| |
| static void handle_tail(struct object_array *commits, struct rev_info *revs) |
| { |
| struct commit *commit; |
| while (commits->nr) { |
| commit = (struct commit *)commits->objects[commits->nr - 1].item; |
| if (has_unshown_parent(commit)) |
| return; |
| handle_commit(commit, revs); |
| commits->nr--; |
| } |
| } |
| |
| static void handle_tag(const char *name, struct tag *tag) |
| { |
| unsigned long size; |
| enum object_type type; |
| char *buf; |
| const char *tagger, *tagger_end, *message; |
| size_t message_size = 0; |
| struct object *tagged; |
| int tagged_mark; |
| struct commit *p; |
| |
| /* Trees have no identifer in fast-export output, thus we have no way |
| * to output tags of trees, tags of tags of trees, etc. Simply omit |
| * such tags. |
| */ |
| tagged = tag->tagged; |
| while (tagged->type == OBJ_TAG) { |
| tagged = ((struct tag *)tagged)->tagged; |
| } |
| if (tagged->type == OBJ_TREE) { |
| warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.", |
| sha1_to_hex(tag->object.sha1)); |
| return; |
| } |
| |
| buf = read_sha1_file(tag->object.sha1, &type, &size); |
| if (!buf) |
| die ("Could not read tag %s", sha1_to_hex(tag->object.sha1)); |
| message = memmem(buf, size, "\n\n", 2); |
| if (message) { |
| message += 2; |
| message_size = strlen(message); |
| } |
| tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8); |
| if (!tagger) { |
| if (fake_missing_tagger) |
| tagger = "tagger Unspecified Tagger " |
| "<unspecified-tagger> 0 +0000"; |
| else |
| tagger = ""; |
| tagger_end = tagger + strlen(tagger); |
| } else { |
| tagger++; |
| tagger_end = strchrnul(tagger, '\n'); |
| } |
| |
| /* handle signed tags */ |
| if (message) { |
| const char *signature = strstr(message, |
| "\n-----BEGIN PGP SIGNATURE-----\n"); |
| if (signature) |
| switch(signed_tag_mode) { |
| case ABORT: |
| die ("Encountered signed tag %s; use " |
| "--signed-tag=<mode> to handle it.", |
| sha1_to_hex(tag->object.sha1)); |
| case WARN: |
| warning ("Exporting signed tag %s", |
| sha1_to_hex(tag->object.sha1)); |
| /* fallthru */ |
| case VERBATIM: |
| break; |
| case STRIP: |
| message_size = signature + 1 - message; |
| break; |
| } |
| } |
| |
| /* handle tag->tagged having been filtered out due to paths specified */ |
| tagged = tag->tagged; |
| tagged_mark = get_object_mark(tagged); |
| if (!tagged_mark) { |
| switch(tag_of_filtered_mode) { |
| case ABORT: |
| die ("Tag %s tags unexported object; use " |
| "--tag-of-filtered-object=<mode> to handle it.", |
| sha1_to_hex(tag->object.sha1)); |
| case DROP: |
| /* Ignore this tag altogether */ |
| return; |
| case REWRITE: |
| if (tagged->type != OBJ_COMMIT) { |
| die ("Tag %s tags unexported %s!", |
| sha1_to_hex(tag->object.sha1), |
| typename(tagged->type)); |
| } |
| p = (struct commit *)tagged; |
| for (;;) { |
| if (p->parents && p->parents->next) |
| break; |
| if (p->object.flags & UNINTERESTING) |
| break; |
| if (!(p->object.flags & TREESAME)) |
| break; |
| if (!p->parents) |
| die ("Can't find replacement commit for tag %s\n", |
| sha1_to_hex(tag->object.sha1)); |
| p = p->parents->item; |
| } |
| tagged_mark = get_object_mark(&p->object); |
| } |
| } |
| |
| if (!prefixcmp(name, "refs/tags/")) |
| name += 10; |
| printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n", |
| name, tagged_mark, |
| (int)(tagger_end - tagger), tagger, |
| tagger == tagger_end ? "" : "\n", |
| (int)message_size, (int)message_size, message ? message : ""); |
| } |
| |
| static void get_tags_and_duplicates(struct object_array *pending, |
| struct string_list *extra_refs) |
| { |
| struct tag *tag; |
| int i; |
| |
| for (i = 0; i < pending->nr; i++) { |
| struct object_array_entry *e = pending->objects + i; |
| unsigned char sha1[20]; |
| struct commit *commit = commit; |
| char *full_name; |
| |
| if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1) |
| continue; |
| |
| switch (e->item->type) { |
| case OBJ_COMMIT: |
| commit = (struct commit *)e->item; |
| break; |
| case OBJ_TAG: |
| tag = (struct tag *)e->item; |
| |
| /* handle nested tags */ |
| while (tag && tag->object.type == OBJ_TAG) { |
| parse_object(tag->object.sha1); |
| string_list_append(extra_refs, full_name)->util = tag; |
| tag = (struct tag *)tag->tagged; |
| } |
| if (!tag) |
| die ("Tag %s points nowhere?", e->name); |
| switch(tag->object.type) { |
| case OBJ_COMMIT: |
| commit = (struct commit *)tag; |
| break; |
| case OBJ_BLOB: |
| handle_object(tag->object.sha1); |
| continue; |
| default: /* OBJ_TAG (nested tags) is already handled */ |
| warning("Tag points to object of unexpected type %s, skipping.", |
| typename(tag->object.type)); |
| continue; |
| } |
| break; |
| default: |
| warning("%s: Unexpected object of type %s, skipping.", |
| e->name, |
| typename(e->item->type)); |
| continue; |
| } |
| if (commit->util) |
| /* more than one name for the same object */ |
| string_list_append(extra_refs, full_name)->util = commit; |
| else |
| commit->util = full_name; |
| } |
| } |
| |
| static void handle_tags_and_duplicates(struct string_list *extra_refs) |
| { |
| struct commit *commit; |
| int i; |
| |
| for (i = extra_refs->nr - 1; i >= 0; i--) { |
| const char *name = extra_refs->items[i].string; |
| struct object *object = extra_refs->items[i].util; |
| switch (object->type) { |
| case OBJ_TAG: |
| handle_tag(name, (struct tag *)object); |
| break; |
| case OBJ_COMMIT: |
| /* create refs pointing to already seen commits */ |
| commit = (struct commit *)object; |
| printf("reset %s\nfrom :%d\n\n", name, |
| get_object_mark(&commit->object)); |
| show_progress(); |
| break; |
| } |
| } |
| } |
| |
| static void export_marks(char *file) |
| { |
| unsigned int i; |
| uint32_t mark; |
| struct object_decoration *deco = idnums.hash; |
| FILE *f; |
| int e = 0; |
| |
| f = fopen(file, "w"); |
| if (!f) |
| die_errno("Unable to open marks file %s for writing.", file); |
| |
| for (i = 0; i < idnums.size; i++) { |
| if (deco->base && deco->base->type == 1) { |
| mark = ptr_to_mark(deco->decoration); |
| if (fprintf(f, ":%"PRIu32" %s\n", mark, |
| sha1_to_hex(deco->base->sha1)) < 0) { |
| e = 1; |
| break; |
| } |
| } |
| deco++; |
| } |
| |
| e |= ferror(f); |
| e |= fclose(f); |
| if (e) |
| error("Unable to write marks file %s.", file); |
| } |
| |
| static void import_marks(char *input_file) |
| { |
| char line[512]; |
| FILE *f = fopen(input_file, "r"); |
| if (!f) |
| die_errno("cannot read '%s'", input_file); |
| |
| while (fgets(line, sizeof(line), f)) { |
| uint32_t mark; |
| char *line_end, *mark_end; |
| unsigned char sha1[20]; |
| struct object *object; |
| |
| line_end = strchr(line, '\n'); |
| if (line[0] != ':' || !line_end) |
| die("corrupt mark line: %s", line); |
| *line_end = '\0'; |
| |
| mark = strtoumax(line + 1, &mark_end, 10); |
| if (!mark || mark_end == line + 1 |
| || *mark_end != ' ' || get_sha1(mark_end + 1, sha1)) |
| die("corrupt mark line: %s", line); |
| |
| object = parse_object(sha1); |
| if (!object) |
| die ("Could not read blob %s", sha1_to_hex(sha1)); |
| |
| if (object->flags & SHOWN) |
| error("Object %s already has a mark", sha1_to_hex(sha1)); |
| |
| mark_object(object, mark); |
| if (last_idnum < mark) |
| last_idnum = mark; |
| |
| object->flags |= SHOWN; |
| } |
| fclose(f); |
| } |
| |
| int cmd_fast_export(int argc, const char **argv, const char *prefix) |
| { |
| struct rev_info revs; |
| struct object_array commits = OBJECT_ARRAY_INIT; |
| struct string_list extra_refs = STRING_LIST_INIT_NODUP; |
| struct commit *commit; |
| char *export_filename = NULL, *import_filename = NULL; |
| struct option options[] = { |
| OPT_INTEGER(0, "progress", &progress, |
| "show progress after <n> objects"), |
| OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, "mode", |
| "select handling of signed tags", |
| parse_opt_signed_tag_mode), |
| OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, "mode", |
| "select handling of tags that tag filtered objects", |
| parse_opt_tag_of_filtered_mode), |
| OPT_STRING(0, "export-marks", &export_filename, "file", |
| "Dump marks to this file"), |
| OPT_STRING(0, "import-marks", &import_filename, "file", |
| "Import marks from this file"), |
| OPT_BOOLEAN(0, "fake-missing-tagger", &fake_missing_tagger, |
| "Fake a tagger when tags lack one"), |
| OPT_BOOLEAN(0, "full-tree", &full_tree, |
| "Output full tree for each commit"), |
| OPT_BOOLEAN(0, "use-done-feature", &use_done_feature, |
| "Use the done feature to terminate the stream"), |
| OPT_BOOL(0, "no-data", &no_data, "Skip output of blob data"), |
| OPT_END() |
| }; |
| |
| if (argc == 1) |
| usage_with_options (fast_export_usage, options); |
| |
| /* we handle encodings */ |
| git_config(git_default_config, NULL); |
| |
| init_revisions(&revs, prefix); |
| revs.topo_order = 1; |
| revs.show_source = 1; |
| revs.rewrite_parents = 1; |
| argc = setup_revisions(argc, argv, &revs, NULL); |
| argc = parse_options(argc, argv, prefix, options, fast_export_usage, 0); |
| if (argc > 1) |
| usage_with_options (fast_export_usage, options); |
| |
| if (use_done_feature) |
| printf("feature done\n"); |
| |
| if (import_filename) |
| import_marks(import_filename); |
| |
| if (import_filename && revs.prune_data.nr) |
| full_tree = 1; |
| |
| get_tags_and_duplicates(&revs.pending, &extra_refs); |
| |
| if (prepare_revision_walk(&revs)) |
| die("revision walk setup failed"); |
| revs.diffopt.format_callback = show_filemodify; |
| DIFF_OPT_SET(&revs.diffopt, RECURSIVE); |
| while ((commit = get_revision(&revs))) { |
| if (has_unshown_parent(commit)) { |
| add_object_array(&commit->object, NULL, &commits); |
| } |
| else { |
| handle_commit(commit, &revs); |
| handle_tail(&commits, &revs); |
| } |
| } |
| |
| handle_tags_and_duplicates(&extra_refs); |
| |
| if (export_filename) |
| export_marks(export_filename); |
| |
| if (use_done_feature) |
| printf("done\n"); |
| |
| return 0; |
| } |