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![Michael Haggerty](/assets/img/avatar_default.png)
Some functions from the refs module were still declared in cache.h. Move them to refs.h. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1074 lines
27 KiB
C
1074 lines
27 KiB
C
/*
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* "git fast-export" builtin command
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*
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* Copyright (C) 2007 Johannes E. Schindelin
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*/
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#include "builtin.h"
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#include "cache.h"
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#include "refs.h"
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#include "commit.h"
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#include "object.h"
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#include "tag.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "log-tree.h"
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#include "revision.h"
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#include "decorate.h"
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#include "string-list.h"
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#include "utf8.h"
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#include "parse-options.h"
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#include "quote.h"
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#include "remote.h"
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#include "blob.h"
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static const char *fast_export_usage[] = {
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N_("git fast-export [rev-list-opts]"),
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NULL
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};
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static int progress;
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static enum { ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = ABORT;
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static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ERROR;
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static int fake_missing_tagger;
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static int use_done_feature;
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static int no_data;
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static int full_tree;
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static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
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static struct refspec *refspecs;
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static int refspecs_nr;
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static int anonymize;
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static int parse_opt_signed_tag_mode(const struct option *opt,
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const char *arg, int unset)
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{
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if (unset || !strcmp(arg, "abort"))
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signed_tag_mode = ABORT;
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else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
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signed_tag_mode = VERBATIM;
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else if (!strcmp(arg, "warn"))
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signed_tag_mode = WARN;
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else if (!strcmp(arg, "warn-strip"))
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signed_tag_mode = WARN_STRIP;
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else if (!strcmp(arg, "strip"))
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signed_tag_mode = STRIP;
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else
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return error("Unknown signed-tags mode: %s", arg);
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return 0;
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}
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static int parse_opt_tag_of_filtered_mode(const struct option *opt,
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const char *arg, int unset)
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{
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if (unset || !strcmp(arg, "abort"))
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tag_of_filtered_mode = ERROR;
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else if (!strcmp(arg, "drop"))
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tag_of_filtered_mode = DROP;
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else if (!strcmp(arg, "rewrite"))
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tag_of_filtered_mode = REWRITE;
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else
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return error("Unknown tag-of-filtered mode: %s", arg);
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return 0;
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}
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static struct decoration idnums;
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static uint32_t last_idnum;
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static int has_unshown_parent(struct commit *commit)
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{
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struct commit_list *parent;
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for (parent = commit->parents; parent; parent = parent->next)
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if (!(parent->item->object.flags & SHOWN) &&
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!(parent->item->object.flags & UNINTERESTING))
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return 1;
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return 0;
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}
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struct anonymized_entry {
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struct hashmap_entry hash;
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const char *orig;
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size_t orig_len;
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const char *anon;
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size_t anon_len;
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};
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static int anonymized_entry_cmp(const void *va, const void *vb,
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const void *data)
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{
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const struct anonymized_entry *a = va, *b = vb;
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return a->orig_len != b->orig_len ||
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memcmp(a->orig, b->orig, a->orig_len);
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}
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/*
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* Basically keep a cache of X->Y so that we can repeatedly replace
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* the same anonymized string with another. The actual generation
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* is farmed out to the generate function.
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*/
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static const void *anonymize_mem(struct hashmap *map,
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void *(*generate)(const void *, size_t *),
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const void *orig, size_t *len)
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{
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struct anonymized_entry key, *ret;
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if (!map->cmpfn)
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hashmap_init(map, anonymized_entry_cmp, 0);
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hashmap_entry_init(&key, memhash(orig, *len));
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key.orig = orig;
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key.orig_len = *len;
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ret = hashmap_get(map, &key, NULL);
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if (!ret) {
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ret = xmalloc(sizeof(*ret));
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hashmap_entry_init(&ret->hash, key.hash.hash);
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ret->orig = xstrdup(orig);
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ret->orig_len = *len;
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ret->anon = generate(orig, len);
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ret->anon_len = *len;
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hashmap_put(map, ret);
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}
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*len = ret->anon_len;
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return ret->anon;
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}
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/*
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* We anonymize each component of a path individually,
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* so that paths a/b and a/c will share a common root.
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* The paths are cached via anonymize_mem so that repeated
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* lookups for "a" will yield the same value.
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*/
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static void anonymize_path(struct strbuf *out, const char *path,
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struct hashmap *map,
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void *(*generate)(const void *, size_t *))
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{
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while (*path) {
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const char *end_of_component = strchrnul(path, '/');
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size_t len = end_of_component - path;
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const char *c = anonymize_mem(map, generate, path, &len);
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strbuf_add(out, c, len);
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path = end_of_component;
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if (*path)
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strbuf_addch(out, *path++);
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}
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}
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/* Since intptr_t is C99, we do not use it here */
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static inline uint32_t *mark_to_ptr(uint32_t mark)
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{
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return ((uint32_t *)NULL) + mark;
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}
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static inline uint32_t ptr_to_mark(void * mark)
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{
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return (uint32_t *)mark - (uint32_t *)NULL;
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}
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static inline void mark_object(struct object *object, uint32_t mark)
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{
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add_decoration(&idnums, object, mark_to_ptr(mark));
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}
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static inline void mark_next_object(struct object *object)
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{
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mark_object(object, ++last_idnum);
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}
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static int get_object_mark(struct object *object)
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{
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void *decoration = lookup_decoration(&idnums, object);
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if (!decoration)
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return 0;
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return ptr_to_mark(decoration);
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}
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static void show_progress(void)
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{
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static int counter = 0;
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if (!progress)
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return;
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if ((++counter % progress) == 0)
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printf("progress %d objects\n", counter);
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}
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/*
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* Ideally we would want some transformation of the blob data here
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* that is unreversible, but would still be the same size and have
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* the same data relationship to other blobs (so that we get the same
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* delta and packing behavior as the original). But the first and last
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* requirements there are probably mutually exclusive, so let's take
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* the easy way out for now, and just generate arbitrary content.
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*
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* There's no need to cache this result with anonymize_mem, since
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* we already handle blob content caching with marks.
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*/
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static char *anonymize_blob(unsigned long *size)
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{
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static int counter;
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struct strbuf out = STRBUF_INIT;
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strbuf_addf(&out, "anonymous blob %d", counter++);
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*size = out.len;
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return strbuf_detach(&out, NULL);
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}
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static void export_blob(const unsigned char *sha1)
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{
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unsigned long size;
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enum object_type type;
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char *buf;
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struct object *object;
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int eaten;
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if (no_data)
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return;
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if (is_null_sha1(sha1))
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return;
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object = lookup_object(sha1);
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if (object && object->flags & SHOWN)
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return;
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if (anonymize) {
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buf = anonymize_blob(&size);
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object = (struct object *)lookup_blob(sha1);
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eaten = 0;
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} else {
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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die ("Could not read blob %s", sha1_to_hex(sha1));
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if (check_sha1_signature(sha1, buf, size, typename(type)) < 0)
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die("sha1 mismatch in blob %s", sha1_to_hex(sha1));
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object = parse_object_buffer(sha1, type, size, buf, &eaten);
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}
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if (!object)
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die("Could not read blob %s", sha1_to_hex(sha1));
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mark_next_object(object);
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printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
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if (size && fwrite(buf, size, 1, stdout) != 1)
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die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
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printf("\n");
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show_progress();
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object->flags |= SHOWN;
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if (!eaten)
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free(buf);
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}
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static int depth_first(const void *a_, const void *b_)
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{
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const struct diff_filepair *a = *((const struct diff_filepair **)a_);
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const struct diff_filepair *b = *((const struct diff_filepair **)b_);
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const char *name_a, *name_b;
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int len_a, len_b, len;
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int cmp;
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name_a = a->one ? a->one->path : a->two->path;
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name_b = b->one ? b->one->path : b->two->path;
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len_a = strlen(name_a);
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len_b = strlen(name_b);
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len = (len_a < len_b) ? len_a : len_b;
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/* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */
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cmp = memcmp(name_a, name_b, len);
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if (cmp)
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return cmp;
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cmp = len_b - len_a;
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if (cmp)
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return cmp;
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/*
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* Move 'R'ename entries last so that all references of the file
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* appear in the output before it is renamed (e.g., when a file
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* was copied and renamed in the same commit).
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*/
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return (a->status == 'R') - (b->status == 'R');
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}
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static void print_path_1(const char *path)
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{
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int need_quote = quote_c_style(path, NULL, NULL, 0);
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if (need_quote)
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quote_c_style(path, NULL, stdout, 0);
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else if (strchr(path, ' '))
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printf("\"%s\"", path);
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else
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printf("%s", path);
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}
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static void *anonymize_path_component(const void *path, size_t *len)
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{
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static int counter;
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struct strbuf out = STRBUF_INIT;
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strbuf_addf(&out, "path%d", counter++);
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return strbuf_detach(&out, len);
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}
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static void print_path(const char *path)
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{
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if (!anonymize)
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print_path_1(path);
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else {
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static struct hashmap paths;
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static struct strbuf anon = STRBUF_INIT;
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anonymize_path(&anon, path, &paths, anonymize_path_component);
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print_path_1(anon.buf);
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strbuf_reset(&anon);
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}
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}
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static void *generate_fake_sha1(const void *old, size_t *len)
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{
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static uint32_t counter = 1; /* avoid null sha1 */
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unsigned char *out = xcalloc(20, 1);
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put_be32(out + 16, counter++);
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return out;
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}
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static const unsigned char *anonymize_sha1(const unsigned char *sha1)
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{
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static struct hashmap sha1s;
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size_t len = 20;
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return anonymize_mem(&sha1s, generate_fake_sha1, sha1, &len);
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}
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static void show_filemodify(struct diff_queue_struct *q,
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struct diff_options *options, void *data)
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{
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int i;
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/*
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* Handle files below a directory first, in case they are all deleted
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* and the directory changes to a file or symlink.
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*/
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qsort(q->queue, q->nr, sizeof(q->queue[0]), depth_first);
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for (i = 0; i < q->nr; i++) {
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struct diff_filespec *ospec = q->queue[i]->one;
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struct diff_filespec *spec = q->queue[i]->two;
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switch (q->queue[i]->status) {
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case DIFF_STATUS_DELETED:
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printf("D ");
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print_path(spec->path);
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putchar('\n');
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break;
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case DIFF_STATUS_COPIED:
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case DIFF_STATUS_RENAMED:
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printf("%c ", q->queue[i]->status);
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print_path(ospec->path);
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putchar(' ');
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print_path(spec->path);
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putchar('\n');
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if (!hashcmp(ospec->sha1, spec->sha1) &&
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ospec->mode == spec->mode)
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break;
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/* fallthrough */
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case DIFF_STATUS_TYPE_CHANGED:
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case DIFF_STATUS_MODIFIED:
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case DIFF_STATUS_ADDED:
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/*
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* Links refer to objects in another repositories;
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* output the SHA-1 verbatim.
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*/
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if (no_data || S_ISGITLINK(spec->mode))
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printf("M %06o %s ", spec->mode,
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sha1_to_hex(anonymize ?
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anonymize_sha1(spec->sha1) :
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spec->sha1));
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else {
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struct object *object = lookup_object(spec->sha1);
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printf("M %06o :%d ", spec->mode,
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get_object_mark(object));
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}
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print_path(spec->path);
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putchar('\n');
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break;
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default:
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die("Unexpected comparison status '%c' for %s, %s",
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q->queue[i]->status,
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ospec->path ? ospec->path : "none",
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spec->path ? spec->path : "none");
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}
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}
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}
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static const char *find_encoding(const char *begin, const char *end)
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{
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const char *needle = "\nencoding ";
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char *bol, *eol;
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bol = memmem(begin, end ? end - begin : strlen(begin),
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needle, strlen(needle));
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if (!bol)
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return git_commit_encoding;
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bol += strlen(needle);
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eol = strchrnul(bol, '\n');
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*eol = '\0';
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return bol;
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}
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static void *anonymize_ref_component(const void *old, size_t *len)
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{
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static int counter;
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struct strbuf out = STRBUF_INIT;
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strbuf_addf(&out, "ref%d", counter++);
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return strbuf_detach(&out, len);
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}
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static const char *anonymize_refname(const char *refname)
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{
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/*
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* If any of these prefixes is found, we will leave it intact
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* so that tags remain tags and so forth.
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*/
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static const char *prefixes[] = {
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"refs/heads/",
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"refs/tags/",
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"refs/remotes/",
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"refs/"
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};
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static struct hashmap refs;
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static struct strbuf anon = STRBUF_INIT;
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int i;
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/*
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* We also leave "master" as a special case, since it does not reveal
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* anything interesting.
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*/
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if (!strcmp(refname, "refs/heads/master"))
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return refname;
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strbuf_reset(&anon);
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for (i = 0; i < ARRAY_SIZE(prefixes); i++) {
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if (skip_prefix(refname, prefixes[i], &refname)) {
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strbuf_addstr(&anon, prefixes[i]);
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break;
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}
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}
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anonymize_path(&anon, refname, &refs, anonymize_ref_component);
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return anon.buf;
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}
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/*
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* We do not even bother to cache commit messages, as they are unlikely
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* to be repeated verbatim, and it is not that interesting when they are.
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*/
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static char *anonymize_commit_message(const char *old)
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{
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static int counter;
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return xstrfmt("subject %d\n\nbody\n", counter++);
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}
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static struct hashmap idents;
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static void *anonymize_ident(const void *old, size_t *len)
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{
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static int counter;
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struct strbuf out = STRBUF_INIT;
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strbuf_addf(&out, "User %d <user%d@example.com>", counter, counter);
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counter++;
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return strbuf_detach(&out, len);
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}
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|
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/*
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* Our strategy here is to anonymize the names and email addresses,
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* but keep timestamps intact, as they influence things like traversal
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* order (and by themselves should not be too revealing).
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*/
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static void anonymize_ident_line(const char **beg, const char **end)
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{
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static struct strbuf buffers[] = { STRBUF_INIT, STRBUF_INIT };
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static unsigned which_buffer;
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struct strbuf *out;
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struct ident_split split;
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const char *end_of_header;
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out = &buffers[which_buffer++];
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which_buffer %= ARRAY_SIZE(buffers);
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strbuf_reset(out);
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/* skip "committer", "author", "tagger", etc */
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end_of_header = strchr(*beg, ' ');
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if (!end_of_header)
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die("BUG: malformed line fed to anonymize_ident_line: %.*s",
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(int)(*end - *beg), *beg);
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end_of_header++;
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strbuf_add(out, *beg, end_of_header - *beg);
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|
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if (!split_ident_line(&split, end_of_header, *end - end_of_header) &&
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split.date_begin) {
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const char *ident;
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size_t len;
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|
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len = split.mail_end - split.name_begin;
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ident = anonymize_mem(&idents, anonymize_ident,
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split.name_begin, &len);
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strbuf_add(out, ident, len);
|
|
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)
|
|
{
|
|
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 = get_commit_buffer(commit, NULL);
|
|
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_or_die(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))
|
|
export_blob(diff_queued_diff.queue[i]->two->sha1);
|
|
|
|
refname = commit->util;
|
|
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(message);
|
|
else if (!is_encoding_utf8(encoding))
|
|
reencoded = reencode_string(message, "UTF-8", encoding);
|
|
if (!commit->parents)
|
|
printf("reset %s\n", refname);
|
|
printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
|
|
refname, 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);
|
|
unuse_commit_buffer(commit, commit_buffer);
|
|
|
|
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 *anonymize_tag(const void *old, size_t *len)
|
|
{
|
|
static int counter;
|
|
struct strbuf out = STRBUF_INIT;
|
|
strbuf_addf(&out, "tag message %d", counter++);
|
|
return strbuf_detach(&out, len);
|
|
}
|
|
|
|
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 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.",
|
|
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');
|
|
if (anonymize)
|
|
anonymize_ident_line(&tagger, &tagger_end);
|
|
}
|
|
|
|
if (anonymize) {
|
|
name = anonymize_refname(name);
|
|
if (message) {
|
|
static struct hashmap tags;
|
|
message = anonymize_mem(&tags, anonymize_tag,
|
|
message, &message_size);
|
|
}
|
|
}
|
|
|
|
/* 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-tags=<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 WARN_STRIP:
|
|
warning ("Stripping signature from tag %s",
|
|
sha1_to_hex(tag->object.sha1));
|
|
/* 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 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 (starts_with(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 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(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);
|
|
return (struct commit *)tag;
|
|
break;
|
|
}
|
|
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;
|
|
unsigned char sha1[20];
|
|
struct commit *commit;
|
|
char *full_name;
|
|
|
|
if (e->flags & UNINTERESTING)
|
|
continue;
|
|
|
|
if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1)
|
|
continue;
|
|
|
|
if (refspecs) {
|
|
char *private;
|
|
private = apply_refspecs(refspecs, refspecs_nr, 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,
|
|
typename(e->item->type));
|
|
continue;
|
|
}
|
|
|
|
switch(commit->object.type) {
|
|
case OBJ_COMMIT:
|
|
break;
|
|
case OBJ_BLOB:
|
|
export_blob(commit->object.sha1);
|
|
continue;
|
|
default: /* OBJ_TAG (nested tags) is already handled */
|
|
warning("Tag points to object of unexpected type %s, skipping.",
|
|
typename(commit->object.type));
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* This ref will not be updated through a commit, lets make
|
|
* sure it gets properly updated eventually.
|
|
*/
|
|
if (commit->util || commit->object.flags & SHOWN)
|
|
string_list_append(&extra_refs, full_name)->util = commit;
|
|
if (!commit->util)
|
|
commit->util = full_name;
|
|
}
|
|
}
|
|
|
|
static void handle_tags_and_duplicates(void)
|
|
{
|
|
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:
|
|
if (anonymize)
|
|
name = anonymize_refname(name);
|
|
/* 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;
|
|
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_sha1_hex(mark_end + 1, sha1))
|
|
die("corrupt mark line: %s", line);
|
|
|
|
if (last_idnum < mark)
|
|
last_idnum = mark;
|
|
|
|
type = sha1_object_info(sha1, NULL);
|
|
if (type < 0)
|
|
die("object not found: %s", sha1_to_hex(sha1));
|
|
|
|
if (type != OBJ_COMMIT)
|
|
/* only commits */
|
|
continue;
|
|
|
|
commit = lookup_commit(sha1);
|
|
if (!commit)
|
|
die("not a commit? can't happen: %s", sha1_to_hex(sha1));
|
|
|
|
object = &commit->object;
|
|
|
|
if (object->flags & SHOWN)
|
|
error("Object %s already has a mark", sha1_to_hex(sha1));
|
|
|
|
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 *refspec = &refspecs[i];
|
|
if (*refspec->src)
|
|
continue;
|
|
|
|
printf("reset %s\nfrom %s\n\n",
|
|
refspec->dst, sha1_to_hex(null_sha1));
|
|
}
|
|
}
|
|
|
|
int cmd_fast_export(int argc, const char **argv, const char *prefix)
|
|
{
|
|
struct rev_info revs;
|
|
struct object_array commits = OBJECT_ARRAY_INIT;
|
|
struct commit *commit;
|
|
char *export_filename = NULL, *import_filename = NULL;
|
|
uint32_t lastimportid;
|
|
struct string_list refspecs_list = STRING_LIST_INIT_NODUP;
|
|
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_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_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_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 = parse_options(argc, argv, prefix, options, fast_export_usage,
|
|
PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN);
|
|
argc = setup_revisions(argc, argv, &revs, NULL);
|
|
if (argc > 1)
|
|
usage_with_options (fast_export_usage, options);
|
|
|
|
if (refspecs_list.nr) {
|
|
const char **refspecs_str;
|
|
int i;
|
|
|
|
refspecs_str = xmalloc(sizeof(*refspecs_str) * refspecs_list.nr);
|
|
for (i = 0; i < refspecs_list.nr; i++)
|
|
refspecs_str[i] = refspecs_list.items[i].string;
|
|
|
|
refspecs_nr = refspecs_list.nr;
|
|
refspecs = parse_fetch_refspec(refspecs_nr, refspecs_str);
|
|
|
|
string_list_clear(&refspecs_list, 1);
|
|
free(refspecs_str);
|
|
}
|
|
|
|
if (use_done_feature)
|
|
printf("feature done\n");
|
|
|
|
if (import_filename)
|
|
import_marks(import_filename);
|
|
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.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();
|
|
handle_deletes();
|
|
|
|
if (export_filename && lastimportid != last_idnum)
|
|
export_marks(export_filename);
|
|
|
|
if (use_done_feature)
|
|
printf("done\n");
|
|
|
|
free_refspec(refspecs_nr, refspecs);
|
|
|
|
return 0;
|
|
}
|