| /* |
| * "git fast-export" builtin command |
| * |
| * Copyright (C) 2007 Johannes E. Schindelin |
| */ |
| #include "builtin.h" |
| #include "config.h" |
| #include "gettext.h" |
| #include "hex.h" |
| #include "refs.h" |
| #include "refspec.h" |
| #include "object-file.h" |
| #include "object-store-ll.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" |
| #include "remote.h" |
| #include "blob.h" |
| |
| static const char *fast_export_usage[] = { |
| N_("git fast-export [<rev-list-opts>]"), |
| NULL |
| }; |
| |
| static int progress; |
| static enum signed_tag_mode { SIGNED_TAG_ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = SIGNED_TAG_ABORT; |
| static enum tag_of_filtered_mode { TAG_FILTERING_ABORT, DROP, REWRITE } tag_of_filtered_mode = TAG_FILTERING_ABORT; |
| static enum reencode_mode { REENCODE_ABORT, REENCODE_YES, REENCODE_NO } reencode_mode = REENCODE_ABORT; |
| static int fake_missing_tagger; |
| static int use_done_feature; |
| static int no_data; |
| static int full_tree; |
| static int reference_excluded_commits; |
| static int show_original_ids; |
| static int mark_tags; |
| static struct string_list extra_refs = STRING_LIST_INIT_NODUP; |
| static struct string_list tag_refs = STRING_LIST_INIT_NODUP; |
| static struct refspec refspecs = REFSPEC_INIT_FETCH; |
| static int anonymize; |
| static struct hashmap anonymized_seeds; |
| static struct revision_sources revision_sources; |
| |
| static int parse_opt_signed_tag_mode(const struct option *opt, |
| const char *arg, int unset) |
| { |
| enum signed_tag_mode *val = opt->value; |
| |
| if (unset || !strcmp(arg, "abort")) |
| *val = SIGNED_TAG_ABORT; |
| else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore")) |
| *val = VERBATIM; |
| else if (!strcmp(arg, "warn")) |
| *val = WARN; |
| else if (!strcmp(arg, "warn-strip")) |
| *val = WARN_STRIP; |
| else if (!strcmp(arg, "strip")) |
| *val = STRIP; |
| else |
| return error("Unknown signed-tags mode: %s", arg); |
| return 0; |
| } |
| |
| static int parse_opt_tag_of_filtered_mode(const struct option *opt, |
| const char *arg, int unset) |
| { |
| enum tag_of_filtered_mode *val = opt->value; |
| |
| if (unset || !strcmp(arg, "abort")) |
| *val = TAG_FILTERING_ABORT; |
| else if (!strcmp(arg, "drop")) |
| *val = DROP; |
| else if (!strcmp(arg, "rewrite")) |
| *val = REWRITE; |
| else |
| return error("Unknown tag-of-filtered mode: %s", arg); |
| return 0; |
| } |
| |
| static int parse_opt_reencode_mode(const struct option *opt, |
| const char *arg, int unset) |
| { |
| enum reencode_mode *val = opt->value; |
| |
| if (unset) { |
| *val = REENCODE_ABORT; |
| return 0; |
| } |
| |
| switch (git_parse_maybe_bool(arg)) { |
| case 0: |
| *val = REENCODE_NO; |
| break; |
| case 1: |
| *val = REENCODE_YES; |
| break; |
| default: |
| if (!strcasecmp(arg, "abort")) |
| *val = REENCODE_ABORT; |
| else |
| return error("Unknown reencoding mode: %s", arg); |
| } |
| |
| return 0; |
| } |
| |
| static struct decoration idnums; |
| static uint32_t last_idnum; |
| struct anonymized_entry { |
| struct hashmap_entry hash; |
| char *anon; |
| const char orig[FLEX_ARRAY]; |
| }; |
| |
| struct anonymized_entry_key { |
| struct hashmap_entry hash; |
| const char *orig; |
| size_t orig_len; |
| }; |
| |
| static int anonymized_entry_cmp(const void *cmp_data UNUSED, |
| const struct hashmap_entry *eptr, |
| const struct hashmap_entry *entry_or_key, |
| const void *keydata) |
| { |
| const struct anonymized_entry *a, *b; |
| |
| a = container_of(eptr, const struct anonymized_entry, hash); |
| if (keydata) { |
| const struct anonymized_entry_key *key = keydata; |
| int equal = !strncmp(a->orig, key->orig, key->orig_len) && |
| !a->orig[key->orig_len]; |
| return !equal; |
| } |
| |
| b = container_of(entry_or_key, const struct anonymized_entry, hash); |
| return strcmp(a->orig, b->orig); |
| } |
| |
| static struct anonymized_entry *add_anonymized_entry(struct hashmap *map, |
| unsigned hash, |
| const char *orig, size_t len, |
| char *anon) |
| { |
| struct anonymized_entry *ret, *old; |
| |
| if (!map->cmpfn) |
| hashmap_init(map, anonymized_entry_cmp, NULL, 0); |
| |
| FLEX_ALLOC_MEM(ret, orig, orig, len); |
| hashmap_entry_init(&ret->hash, hash); |
| ret->anon = anon; |
| old = hashmap_put_entry(map, ret, hash); |
| |
| if (old) { |
| free(old->anon); |
| free(old); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Basically keep a cache of X->Y so that we can repeatedly replace |
| * the same anonymized string with another. The actual generation |
| * is farmed out to the generate function. |
| */ |
| static const char *anonymize_str(struct hashmap *map, |
| char *(*generate)(void), |
| const char *orig, size_t len) |
| { |
| struct anonymized_entry_key key; |
| struct anonymized_entry *ret; |
| |
| hashmap_entry_init(&key.hash, memhash(orig, len)); |
| key.orig = orig; |
| key.orig_len = len; |
| |
| /* First check if it's a token the user configured manually... */ |
| ret = hashmap_get_entry(&anonymized_seeds, &key, hash, &key); |
| |
| /* ...otherwise check if we've already seen it in this context... */ |
| if (!ret) |
| ret = hashmap_get_entry(map, &key, hash, &key); |
| |
| /* ...and finally generate a new mapping if necessary */ |
| if (!ret) |
| ret = add_anonymized_entry(map, key.hash.hash, |
| orig, len, generate()); |
| |
| return ret->anon; |
| } |
| |
| /* |
| * We anonymize each component of a path individually, |
| * so that paths a/b and a/c will share a common root. |
| * The paths are cached via anonymize_mem so that repeated |
| * lookups for "a" will yield the same value. |
| */ |
| static void anonymize_path(struct strbuf *out, const char *path, |
| struct hashmap *map, |
| char *(*generate)(void)) |
| { |
| while (*path) { |
| const char *end_of_component = strchrnul(path, '/'); |
| size_t len = end_of_component - path; |
| const char *c = anonymize_str(map, generate, path, len); |
| strbuf_addstr(out, c); |
| path = end_of_component; |
| if (*path) |
| strbuf_addch(out, *path++); |
| } |
| } |
| |
| static inline void *mark_to_ptr(uint32_t mark) |
| { |
| return (void *)(uintptr_t)mark; |
| } |
| |
| static inline uint32_t ptr_to_mark(void * mark) |
| { |
| return (uint32_t)(uintptr_t)mark; |
| } |
| |
| 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 struct commit *rewrite_commit(struct commit *p) |
| { |
| for (;;) { |
| if (p->parents && p->parents->next) |
| break; |
| if (p->object.flags & UNINTERESTING) |
| break; |
| if (!(p->object.flags & TREESAME)) |
| break; |
| if (!p->parents) |
| return NULL; |
| p = p->parents->item; |
| } |
| return p; |
| } |
| |
| static void show_progress(void) |
| { |
| static int counter = 0; |
| if (!progress) |
| return; |
| if ((++counter % progress) == 0) |
| printf("progress %d objects\n", counter); |
| } |
| |
| /* |
| * Ideally we would want some transformation of the blob data here |
| * that is unreversible, but would still be the same size and have |
| * the same data relationship to other blobs (so that we get the same |
| * delta and packing behavior as the original). But the first and last |
| * requirements there are probably mutually exclusive, so let's take |
| * the easy way out for now, and just generate arbitrary content. |
| * |
| * There's no need to cache this result with anonymize_mem, since |
| * we already handle blob content caching with marks. |
| */ |
| static char *anonymize_blob(unsigned long *size) |
| { |
| static int counter; |
| struct strbuf out = STRBUF_INIT; |
| strbuf_addf(&out, "anonymous blob %d", counter++); |
| *size = out.len; |
| return strbuf_detach(&out, NULL); |
| } |
| |
| static void export_blob(const struct object_id *oid) |
| { |
| unsigned long size; |
| enum object_type type; |
| char *buf; |
| struct object *object; |
| int eaten; |
| |
| if (no_data) |
| return; |
| |
| if (is_null_oid(oid)) |
| return; |
| |
| object = lookup_object(the_repository, oid); |
| if (object && object->flags & SHOWN) |
| return; |
| |
| if (anonymize) { |
| buf = anonymize_blob(&size); |
| object = (struct object *)lookup_blob(the_repository, oid); |
| eaten = 0; |
| } else { |
| buf = repo_read_object_file(the_repository, oid, &type, &size); |
| if (!buf) |
| die("could not read blob %s", oid_to_hex(oid)); |
| if (check_object_signature(the_repository, oid, buf, size, |
| type) < 0) |
| die("oid mismatch in blob %s", oid_to_hex(oid)); |
| object = parse_object_buffer(the_repository, oid, type, |
| size, buf, &eaten); |
| } |
| |
| if (!object) |
| die("Could not read blob %s", oid_to_hex(oid)); |
| |
| mark_next_object(object); |
| |
| printf("blob\nmark :%"PRIu32"\n", last_idnum); |
| if (show_original_ids) |
| printf("original-oid %s\n", oid_to_hex(oid)); |
| printf("data %"PRIuMAX"\n", (uintmax_t)size); |
| if (size && fwrite(buf, size, 1, stdout) != 1) |
| die_errno("could not write blob '%s'", oid_to_hex(oid)); |
| printf("\n"); |
| |
| show_progress(); |
| |
| object->flags |= SHOWN; |
| if (!eaten) |
| 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_1(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 char *anonymize_path_component(void) |
| { |
| static int counter; |
| struct strbuf out = STRBUF_INIT; |
| strbuf_addf(&out, "path%d", counter++); |
| return strbuf_detach(&out, NULL); |
| } |
| |
| static void print_path(const char *path) |
| { |
| if (!anonymize) |
| print_path_1(path); |
| else { |
| static struct hashmap paths; |
| static struct strbuf anon = STRBUF_INIT; |
| |
| anonymize_path(&anon, path, &paths, anonymize_path_component); |
| print_path_1(anon.buf); |
| strbuf_reset(&anon); |
| } |
| } |
| |
| static char *generate_fake_oid(void) |
| { |
| static uint32_t counter = 1; /* avoid null oid */ |
| const unsigned hashsz = the_hash_algo->rawsz; |
| struct object_id oid; |
| char *hex = xmallocz(GIT_MAX_HEXSZ); |
| |
| oidclr(&oid); |
| put_be32(oid.hash + hashsz - 4, counter++); |
| return oid_to_hex_r(hex, &oid); |
| } |
| |
| static const char *anonymize_oid(const char *oid_hex) |
| { |
| static struct hashmap objs; |
| size_t len = strlen(oid_hex); |
| return anonymize_str(&objs, generate_fake_oid, oid_hex, len); |
| } |
| |
| static void show_filemodify(struct diff_queue_struct *q, |
| struct diff_options *options UNUSED, void *data) |
| { |
| int i; |
| struct string_list *changed = data; |
| |
| /* |
| * 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, 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); |
| string_list_insert(changed, spec->path); |
| putchar('\n'); |
| break; |
| |
| case DIFF_STATUS_COPIED: |
| case DIFF_STATUS_RENAMED: |
| /* |
| * If a change in the file corresponding to ospec->path |
| * has been observed, we cannot trust its contents |
| * because the diff is calculated based on the prior |
| * contents, not the current contents. So, declare a |
| * copy or rename only if there was no change observed. |
| */ |
| if (!string_list_has_string(changed, ospec->path)) { |
| printf("%c ", q->queue[i]->status); |
| print_path(ospec->path); |
| putchar(' '); |
| print_path(spec->path); |
| string_list_insert(changed, spec->path); |
| putchar('\n'); |
| |
| if (oideq(&ospec->oid, &spec->oid) && |
| 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, |
| anonymize ? |
| anonymize_oid(oid_to_hex(&spec->oid)) : |
| oid_to_hex(&spec->oid)); |
| else { |
| struct object *object = lookup_object(the_repository, |
| &spec->oid); |
| printf("M %06o :%d ", spec->mode, |
| get_object_mark(object)); |
| } |
| print_path(spec->path); |
| string_list_insert(changed, 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 NULL; |
| bol += strlen(needle); |
| eol = strchrnul(bol, '\n'); |
| *eol = '\0'; |
| return bol; |
| } |
| |
| static char *anonymize_ref_component(void) |
| { |
| static int counter; |
| struct strbuf out = STRBUF_INIT; |
| strbuf_addf(&out, "ref%d", counter++); |
| return strbuf_detach(&out, NULL); |
| } |
| |
| static const char *anonymize_refname(const char *refname) |
| { |
| /* |
| * If any of these prefixes is found, we will leave it intact |
| * so that tags remain tags and so forth. |
| */ |
| static const char *prefixes[] = { |
| "refs/heads/", |
| "refs/tags/", |
| "refs/remotes/", |
| "refs/" |
| }; |
| static struct hashmap refs; |
| static struct strbuf anon = STRBUF_INIT; |
| int i; |
| |
| strbuf_reset(&anon); |
| for (i = 0; i < ARRAY_SIZE(prefixes); i++) { |
| if (skip_prefix(refname, prefixes[i], &refname)) { |
| strbuf_addstr(&anon, prefixes[i]); |
| break; |
| } |
| } |
| |
| anonymize_path(&anon, refname, &refs, anonymize_ref_component); |
| return anon.buf; |
| } |
| |
| /* |
| * We do not even bother to cache commit messages, as they are unlikely |
| * to be repeated verbatim, and it is not that interesting when they are. |
| */ |
| static char *anonymize_commit_message(void) |
| { |
| static int counter; |
| return xstrfmt("subject %d\n\nbody\n", counter++); |
| } |
| |
| static char *anonymize_ident(void) |
| { |
| static int counter; |
| struct strbuf out = STRBUF_INIT; |
| strbuf_addf(&out, "User %d <user%d@example.com>", counter, counter); |
| counter++; |
| return strbuf_detach(&out, NULL); |
| } |
| |
| /* |
| * Our strategy here is to anonymize the names and email addresses, |
| * but keep timestamps intact, as they influence things like traversal |
| * order (and by themselves should not be too revealing). |
| */ |
| static void anonymize_ident_line(const char **beg, const char **end) |
| { |
| static struct hashmap idents; |
| static struct strbuf buffers[] = { STRBUF_INIT, STRBUF_INIT }; |
| static unsigned which_buffer; |
| |
| struct strbuf *out; |
| struct ident_split split; |
| const char *end_of_header; |
| |
| out = &buffers[which_buffer++]; |
| which_buffer %= ARRAY_SIZE(buffers); |
| strbuf_reset(out); |
| |
| /* skip "committer", "author", "tagger", etc */ |
| end_of_header = strchr(*beg, ' '); |
| if (!end_of_header) |
| BUG("malformed line fed to anonymize_ident_line: %.*s", |
| (int)(*end - *beg), *beg); |
| end_of_header++; |
| strbuf_add(out, *beg, end_of_header - *beg); |
| |
| if (!split_ident_line(&split, end_of_header, *end - end_of_header) && |
| split.date_begin) { |
| const char *ident; |
| size_t len; |
| |
| len = split.mail_end - split.name_begin; |
| ident = anonymize_str(&idents, anonymize_ident, |
| split.name_begin, len); |
| strbuf_addstr(out, ident); |
| strbuf_addch(out, ' '); |
| strbuf_add(out, split.date_begin, split.tz_end - split.date_begin); |
| } else { |
| strbuf_addstr(out, "Malformed Ident <malformed@example.com> 0 -0000"); |
| } |
| |
| *beg = out->buf; |
| *end = out->buf + out->len; |
| } |
| |
| static void handle_commit(struct commit *commit, struct rev_info *rev, |
| struct string_list *paths_of_changed_objects) |
| { |
| int saved_output_format = rev->diffopt.output_format; |
| const char *commit_buffer; |
| const char *author, *author_end, *committer, *committer_end; |
| const char *encoding, *message; |
| char *reencoded = NULL; |
| struct commit_list *p; |
| const char *refname; |
| int i; |
| |
| rev->diffopt.output_format = DIFF_FORMAT_CALLBACK; |
| |
| parse_commit_or_die(commit); |
| commit_buffer = repo_get_commit_buffer(the_repository, commit, NULL); |
| author = strstr(commit_buffer, "\nauthor "); |
| if (!author) |
| die("could not find author in commit %s", |
| oid_to_hex(&commit->object.oid)); |
| author++; |
| author_end = strchrnul(author, '\n'); |
| committer = strstr(author_end, "\ncommitter "); |
| if (!committer) |
| die("could not find committer in commit %s", |
| oid_to_hex(&commit->object.oid)); |
| 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 || |
| reference_excluded_commits) && |
| !full_tree) { |
| parse_commit_or_die(commit->parents->item); |
| diff_tree_oid(get_commit_tree_oid(commit->parents->item), |
| get_commit_tree_oid(commit), "", &rev->diffopt); |
| } |
| else |
| diff_root_tree_oid(get_commit_tree_oid(commit), |
| "", &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)) |
| export_blob(&diff_queued_diff.queue[i]->two->oid); |
| |
| refname = *revision_sources_at(&revision_sources, commit); |
| /* |
| * FIXME: string_list_remove() below for each ref is overall |
| * O(N^2). Compared to a history walk and diffing trees, this is |
| * just lost in the noise in practice. However, theoretically a |
| * repo may have enough refs for this to become slow. |
| */ |
| string_list_remove(&extra_refs, refname, 0); |
| if (anonymize) { |
| refname = anonymize_refname(refname); |
| anonymize_ident_line(&committer, &committer_end); |
| anonymize_ident_line(&author, &author_end); |
| } |
| |
| mark_next_object(&commit->object); |
| if (anonymize) { |
| reencoded = anonymize_commit_message(); |
| } else if (encoding) { |
| switch(reencode_mode) { |
| case REENCODE_YES: |
| reencoded = reencode_string(message, "UTF-8", encoding); |
| break; |
| case REENCODE_NO: |
| break; |
| case REENCODE_ABORT: |
| die("Encountered commit-specific encoding %s in commit " |
| "%s; use --reencode=[yes|no] to handle it", |
| encoding, oid_to_hex(&commit->object.oid)); |
| } |
| } |
| if (!commit->parents) |
| printf("reset %s\n", refname); |
| printf("commit %s\nmark :%"PRIu32"\n", refname, last_idnum); |
| if (show_original_ids) |
| printf("original-oid %s\n", oid_to_hex(&commit->object.oid)); |
| printf("%.*s\n%.*s\n", |
| (int)(author_end - author), author, |
| (int)(committer_end - committer), committer); |
| if (!reencoded && encoding) |
| printf("encoding %s\n", encoding); |
| printf("data %u\n%s", |
| (unsigned)(reencoded |
| ? strlen(reencoded) : message |
| ? strlen(message) : 0), |
| reencoded ? reencoded : message ? message : ""); |
| free(reencoded); |
| repo_unuse_commit_buffer(the_repository, commit, commit_buffer); |
| |
| for (i = 0, p = commit->parents; p; p = p->next) { |
| struct object *obj = &p->item->object; |
| int mark = get_object_mark(obj); |
| |
| if (!mark && !reference_excluded_commits) |
| continue; |
| if (i == 0) |
| printf("from "); |
| else |
| printf("merge "); |
| if (mark) |
| printf(":%d\n", mark); |
| else |
| printf("%s\n", |
| anonymize ? |
| anonymize_oid(oid_to_hex(&obj->oid)) : |
| oid_to_hex(&obj->oid)); |
| i++; |
| } |
| |
| if (full_tree) |
| printf("deleteall\n"); |
| log_tree_diff_flush(rev); |
| string_list_clear(paths_of_changed_objects, 0); |
| rev->diffopt.output_format = saved_output_format; |
| |
| printf("\n"); |
| |
| show_progress(); |
| } |
| |
| static char *anonymize_tag(void) |
| { |
| static int counter; |
| struct strbuf out = STRBUF_INIT; |
| strbuf_addf(&out, "tag message %d", counter++); |
| return strbuf_detach(&out, NULL); |
| } |
| |
| |
| 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 identifier 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.", |
| oid_to_hex(&tag->object.oid)); |
| return; |
| } |
| |
| buf = repo_read_object_file(the_repository, &tag->object.oid, &type, |
| &size); |
| if (!buf) |
| die("could not read tag %s", oid_to_hex(&tag->object.oid)); |
| 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'); |
| if (anonymize) |
| anonymize_ident_line(&tagger, &tagger_end); |
| } |
| |
| if (anonymize) { |
| name = anonymize_refname(name); |
| if (message) { |
| static struct hashmap tags; |
| message = anonymize_str(&tags, anonymize_tag, |
| message, message_size); |
| message_size = strlen(message); |
| } |
| } |
| |
| /* handle signed tags */ |
| if (message) { |
| const char *signature = strstr(message, |
| "\n-----BEGIN PGP SIGNATURE-----\n"); |
| if (signature) |
| switch(signed_tag_mode) { |
| case SIGNED_TAG_ABORT: |
| die("encountered signed tag %s; use " |
| "--signed-tags=<mode> to handle it", |
| oid_to_hex(&tag->object.oid)); |
| case WARN: |
| warning("exporting signed tag %s", |
| oid_to_hex(&tag->object.oid)); |
| /* fallthru */ |
| case VERBATIM: |
| break; |
| case WARN_STRIP: |
| warning("stripping signature from tag %s", |
| oid_to_hex(&tag->object.oid)); |
| /* fallthru */ |
| 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 TAG_FILTERING_ABORT: |
| die("tag %s tags unexported object; use " |
| "--tag-of-filtered-object=<mode> to handle it", |
| oid_to_hex(&tag->object.oid)); |
| case DROP: |
| /* Ignore this tag altogether */ |
| free(buf); |
| return; |
| case REWRITE: |
| if (tagged->type == OBJ_TAG && !mark_tags) { |
| die(_("Error: Cannot export nested tags unless --mark-tags is specified.")); |
| } else if (tagged->type == OBJ_COMMIT) { |
| p = rewrite_commit((struct commit *)tagged); |
| if (!p) { |
| printf("reset %s\nfrom %s\n\n", |
| name, oid_to_hex(null_oid())); |
| free(buf); |
| return; |
| } |
| tagged_mark = get_object_mark(&p->object); |
| } else { |
| /* tagged->type is either OBJ_BLOB or OBJ_TAG */ |
| tagged_mark = get_object_mark(tagged); |
| } |
| } |
| } |
| |
| if (tagged->type == OBJ_TAG) { |
| printf("reset %s\nfrom %s\n\n", |
| name, oid_to_hex(null_oid())); |
| } |
| skip_prefix(name, "refs/tags/", &name); |
| printf("tag %s\n", name); |
| if (mark_tags) { |
| mark_next_object(&tag->object); |
| printf("mark :%"PRIu32"\n", last_idnum); |
| } |
| if (tagged_mark) |
| printf("from :%d\n", tagged_mark); |
| else |
| printf("from %s\n", oid_to_hex(&tagged->oid)); |
| |
| if (show_original_ids) |
| printf("original-oid %s\n", oid_to_hex(&tag->object.oid)); |
| printf("%.*s%sdata %d\n%.*s\n", |
| (int)(tagger_end - tagger), tagger, |
| tagger == tagger_end ? "" : "\n", |
| (int)message_size, (int)message_size, message ? message : ""); |
| free(buf); |
| } |
| |
| static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name) |
| { |
| switch (e->item->type) { |
| case OBJ_COMMIT: |
| return (struct commit *)e->item; |
| case OBJ_TAG: { |
| struct tag *tag = (struct tag *)e->item; |
| |
| /* handle nested tags */ |
| while (tag && tag->object.type == OBJ_TAG) { |
| parse_object(the_repository, &tag->object.oid); |
| string_list_append(&tag_refs, full_name)->util = tag; |
| tag = (struct tag *)tag->tagged; |
| } |
| if (!tag) |
| die("Tag %s points nowhere?", e->name); |
| return (struct commit *)tag; |
| } |
| default: |
| return NULL; |
| } |
| } |
| |
| static void get_tags_and_duplicates(struct rev_cmdline_info *info) |
| { |
| int i; |
| |
| for (i = 0; i < info->nr; i++) { |
| struct rev_cmdline_entry *e = info->rev + i; |
| struct object_id oid; |
| struct commit *commit; |
| char *full_name; |
| |
| if (e->flags & UNINTERESTING) |
| continue; |
| |
| if (repo_dwim_ref(the_repository, e->name, strlen(e->name), |
| &oid, &full_name, 0) != 1) |
| continue; |
| |
| if (refspecs.nr) { |
| char *private; |
| private = apply_refspecs(&refspecs, full_name); |
| if (private) { |
| free(full_name); |
| full_name = private; |
| } |
| } |
| |
| commit = get_commit(e, full_name); |
| if (!commit) { |
| warning("%s: Unexpected object of type %s, skipping.", |
| e->name, |
| type_name(e->item->type)); |
| continue; |
| } |
| |
| switch(commit->object.type) { |
| case OBJ_COMMIT: |
| break; |
| case OBJ_BLOB: |
| export_blob(&commit->object.oid); |
| continue; |
| default: /* OBJ_TAG (nested tags) is already handled */ |
| warning("Tag points to object of unexpected type %s, skipping.", |
| type_name(commit->object.type)); |
| continue; |
| } |
| |
| /* |
| * Make sure this ref gets properly updated eventually, whether |
| * through a commit or manually at the end. |
| */ |
| if (e->item->type != OBJ_TAG) |
| string_list_append(&extra_refs, full_name)->util = commit; |
| |
| if (!*revision_sources_at(&revision_sources, commit)) |
| *revision_sources_at(&revision_sources, commit) = full_name; |
| } |
| |
| string_list_sort(&extra_refs); |
| string_list_remove_duplicates(&extra_refs, 0); |
| } |
| |
| static void handle_tags_and_duplicates(struct string_list *extras) |
| { |
| struct commit *commit; |
| int i; |
| |
| for (i = extras->nr - 1; i >= 0; i--) { |
| const char *name = extras->items[i].string; |
| struct object *object = extras->items[i].util; |
| int mark; |
| |
| switch (object->type) { |
| case OBJ_TAG: |
| handle_tag(name, (struct tag *)object); |
| break; |
| case OBJ_COMMIT: |
| if (anonymize) |
| name = anonymize_refname(name); |
| /* create refs pointing to already seen commits */ |
| commit = rewrite_commit((struct commit *)object); |
| if (!commit) { |
| /* |
| * Neither this object nor any of its |
| * ancestors touch any relevant paths, so |
| * it has been filtered to nothing. Delete |
| * it. |
| */ |
| printf("reset %s\nfrom %s\n\n", |
| name, oid_to_hex(null_oid())); |
| continue; |
| } |
| |
| mark = get_object_mark(&commit->object); |
| if (!mark) { |
| /* |
| * Getting here means we have a commit which |
| * was excluded by a negative refspec (e.g. |
| * fast-export ^HEAD HEAD). If we are |
| * referencing excluded commits, set the ref |
| * to the exact commit. Otherwise, the user |
| * wants the branch exported but every commit |
| * in its history to be deleted, which basically |
| * just means deletion of the ref. |
| */ |
| if (!reference_excluded_commits) { |
| /* delete the ref */ |
| printf("reset %s\nfrom %s\n\n", |
| name, oid_to_hex(null_oid())); |
| continue; |
| } |
| /* set ref to commit using oid, not mark */ |
| printf("reset %s\nfrom %s\n\n", name, |
| oid_to_hex(&commit->object.oid)); |
| continue; |
| } |
| |
| printf("reset %s\nfrom :%d\n\n", name, mark |
| ); |
| show_progress(); |
| break; |
| } |
| } |
| } |
| |
| static void export_marks(char *file) |
| { |
| unsigned int i; |
| uint32_t mark; |
| struct decoration_entry *deco = idnums.entries; |
| FILE *f; |
| int e = 0; |
| |
| f = fopen_for_writing(file); |
| 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, |
| oid_to_hex(&deco->base->oid)) < 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, int check_exists) |
| { |
| char line[512]; |
| FILE *f; |
| struct stat sb; |
| |
| if (check_exists && stat(input_file, &sb)) |
| return; |
| |
| f = xfopen(input_file, "r"); |
| while (fgets(line, sizeof(line), f)) { |
| uint32_t mark; |
| char *line_end, *mark_end; |
| struct object_id oid; |
| struct object *object; |
| struct commit *commit; |
| enum object_type type; |
| |
| 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_oid_hex(mark_end + 1, &oid)) |
| die("corrupt mark line: %s", line); |
| |
| if (last_idnum < mark) |
| last_idnum = mark; |
| |
| type = oid_object_info(the_repository, &oid, NULL); |
| if (type < 0) |
| die("object not found: %s", oid_to_hex(&oid)); |
| |
| if (type != OBJ_COMMIT) |
| /* only commits */ |
| continue; |
| |
| commit = lookup_commit(the_repository, &oid); |
| if (!commit) |
| die("not a commit? can't happen: %s", oid_to_hex(&oid)); |
| |
| object = &commit->object; |
| |
| if (object->flags & SHOWN) |
| error("Object %s already has a mark", oid_to_hex(&oid)); |
| |
| mark_object(object, mark); |
| |
| object->flags |= SHOWN; |
| } |
| fclose(f); |
| } |
| |
| static void handle_deletes(void) |
| { |
| int i; |
| for (i = 0; i < refspecs.nr; i++) { |
| struct refspec_item *refspec = &refspecs.items[i]; |
| if (*refspec->src) |
| continue; |
| |
| printf("reset %s\nfrom %s\n\n", |
| refspec->dst, oid_to_hex(null_oid())); |
| } |
| } |
| |
| static int parse_opt_anonymize_map(const struct option *opt, |
| const char *arg, int unset) |
| { |
| struct hashmap *map = opt->value; |
| const char *delim, *value; |
| size_t keylen; |
| |
| BUG_ON_OPT_NEG(unset); |
| |
| delim = strchr(arg, ':'); |
| if (delim) { |
| keylen = delim - arg; |
| value = delim + 1; |
| } else { |
| keylen = strlen(arg); |
| value = arg; |
| } |
| |
| if (!keylen || !*value) |
| return error(_("--anonymize-map token cannot be empty")); |
| |
| add_anonymized_entry(map, memhash(arg, keylen), arg, keylen, |
| xstrdup(value)); |
| |
| return 0; |
| } |
| |
| int cmd_fast_export(int argc, const char **argv, const char *prefix) |
| { |
| struct rev_info revs; |
| struct commit *commit; |
| char *export_filename = NULL, |
| *import_filename = NULL, |
| *import_filename_if_exists = NULL; |
| uint32_t lastimportid; |
| struct string_list refspecs_list = STRING_LIST_INIT_NODUP; |
| struct string_list paths_of_changed_objects = STRING_LIST_INIT_DUP; |
| struct option options[] = { |
| OPT_INTEGER(0, "progress", &progress, |
| N_("show progress after <n> objects")), |
| OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, N_("mode"), |
| N_("select handling of signed tags"), |
| parse_opt_signed_tag_mode), |
| OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, N_("mode"), |
| N_("select handling of tags that tag filtered objects"), |
| parse_opt_tag_of_filtered_mode), |
| OPT_CALLBACK(0, "reencode", &reencode_mode, N_("mode"), |
| N_("select handling of commit messages in an alternate encoding"), |
| parse_opt_reencode_mode), |
| OPT_STRING(0, "export-marks", &export_filename, N_("file"), |
| N_("dump marks to this file")), |
| OPT_STRING(0, "import-marks", &import_filename, N_("file"), |
| N_("import marks from this file")), |
| OPT_STRING(0, "import-marks-if-exists", |
| &import_filename_if_exists, |
| N_("file"), |
| N_("import marks from this file if it exists")), |
| OPT_BOOL(0, "fake-missing-tagger", &fake_missing_tagger, |
| N_("fake a tagger when tags lack one")), |
| OPT_BOOL(0, "full-tree", &full_tree, |
| N_("output full tree for each commit")), |
| OPT_BOOL(0, "use-done-feature", &use_done_feature, |
| N_("use the done feature to terminate the stream")), |
| OPT_BOOL(0, "no-data", &no_data, N_("skip output of blob data")), |
| OPT_STRING_LIST(0, "refspec", &refspecs_list, N_("refspec"), |
| N_("apply refspec to exported refs")), |
| OPT_BOOL(0, "anonymize", &anonymize, N_("anonymize output")), |
| OPT_CALLBACK_F(0, "anonymize-map", &anonymized_seeds, N_("from:to"), |
| N_("convert <from> to <to> in anonymized output"), |
| PARSE_OPT_NONEG, parse_opt_anonymize_map), |
| OPT_BOOL(0, "reference-excluded-parents", |
| &reference_excluded_commits, N_("reference parents which are not in fast-export stream by object id")), |
| OPT_BOOL(0, "show-original-ids", &show_original_ids, |
| N_("show original object ids of blobs/commits")), |
| OPT_BOOL(0, "mark-tags", &mark_tags, |
| N_("label tags with mark ids")), |
| |
| OPT_END() |
| }; |
| |
| if (argc == 1) |
| usage_with_options (fast_export_usage, options); |
| |
| /* we handle encodings */ |
| git_config(git_default_config, NULL); |
| |
| repo_init_revisions(the_repository, &revs, prefix); |
| init_revision_sources(&revision_sources); |
| revs.topo_order = 1; |
| revs.sources = &revision_sources; |
| revs.rewrite_parents = 1; |
| argc = parse_options(argc, argv, prefix, options, fast_export_usage, |
| PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN_OPT); |
| argc = setup_revisions(argc, argv, &revs, NULL); |
| if (argc > 1) |
| usage_with_options (fast_export_usage, options); |
| |
| if (anonymized_seeds.cmpfn && !anonymize) |
| die(_("the option '%s' requires '%s'"), "--anonymize-map", "--anonymize"); |
| |
| if (refspecs_list.nr) { |
| int i; |
| |
| for (i = 0; i < refspecs_list.nr; i++) |
| refspec_append(&refspecs, refspecs_list.items[i].string); |
| |
| string_list_clear(&refspecs_list, 1); |
| } |
| |
| if (use_done_feature) |
| printf("feature done\n"); |
| |
| if (import_filename && import_filename_if_exists) |
| die(_("options '%s' and '%s' cannot be used together"), "--import-marks", "--import-marks-if-exists"); |
| if (import_filename) |
| import_marks(import_filename, 0); |
| else if (import_filename_if_exists) |
| import_marks(import_filename_if_exists, 1); |
| lastimportid = last_idnum; |
| |
| if (import_filename && revs.prune_data.nr) |
| full_tree = 1; |
| |
| get_tags_and_duplicates(&revs.cmdline); |
| |
| if (prepare_revision_walk(&revs)) |
| die("revision walk setup failed"); |
| |
| revs.reverse = 1; |
| revs.diffopt.format_callback = show_filemodify; |
| revs.diffopt.format_callback_data = &paths_of_changed_objects; |
| revs.diffopt.flags.recursive = 1; |
| revs.diffopt.no_free = 1; |
| while ((commit = get_revision(&revs))) |
| handle_commit(commit, &revs, &paths_of_changed_objects); |
| |
| handle_tags_and_duplicates(&extra_refs); |
| handle_tags_and_duplicates(&tag_refs); |
| handle_deletes(); |
| |
| if (export_filename && lastimportid != last_idnum) |
| export_marks(export_filename); |
| |
| if (use_done_feature) |
| printf("done\n"); |
| |
| refspec_clear(&refspecs); |
| release_revisions(&revs); |
| |
| return 0; |
| } |