+++ /dev/null
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-
-#include "pack-objects.h"
-
-#include "buf.h"
-#include "zstream.h"
-#include "delta.h"
-#include "iterator.h"
-#include "netops.h"
-#include "pack.h"
-#include "thread.h"
-#include "tree.h"
-#include "util.h"
-#include "revwalk.h"
-#include "commit_list.h"
-
-#include "git2/pack.h"
-#include "git2/commit.h"
-#include "git2/tag.h"
-#include "git2/indexer.h"
-#include "git2/config.h"
-
-struct unpacked {
- git_pobject *object;
- void *data;
- struct git_delta_index *index;
- size_t depth;
-};
-
-struct tree_walk_context {
- git_packbuilder *pb;
- git_str buf;
-};
-
-struct pack_write_context {
- git_indexer *indexer;
- git_indexer_progress *stats;
-};
-
-struct walk_object {
- git_oid id;
- unsigned int uninteresting:1,
- seen:1;
-};
-
-#ifdef GIT_THREADS
-# define GIT_PACKBUILDER__MUTEX_OP(pb, mtx, op) git_mutex_##op(&(pb)->mtx)
-#else
-# define GIT_PACKBUILDER__MUTEX_OP(pb, mtx, op) git__noop()
-#endif
-
-#define git_packbuilder__cache_lock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, cache_mutex, lock)
-#define git_packbuilder__cache_unlock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, cache_mutex, unlock)
-#define git_packbuilder__progress_lock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, progress_mutex, lock)
-#define git_packbuilder__progress_unlock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, progress_mutex, unlock)
-
-/* The minimal interval between progress updates (in seconds). */
-#define MIN_PROGRESS_UPDATE_INTERVAL 0.5
-
-/* Size of the buffer to feed to zlib */
-#define COMPRESS_BUFLEN (1024 * 1024)
-
-static unsigned name_hash(const char *name)
-{
- unsigned c, hash = 0;
-
- if (!name)
- return 0;
-
- /*
- * This effectively just creates a sortable number from the
- * last sixteen non-whitespace characters. Last characters
- * count "most", so things that end in ".c" sort together.
- */
- while ((c = *name++) != 0) {
- if (git__isspace(c))
- continue;
- hash = (hash >> 2) + (c << 24);
- }
- return hash;
-}
-
-static int packbuilder_config(git_packbuilder *pb)
-{
- git_config *config;
- int ret = 0;
- int64_t val;
-
- if ((ret = git_repository_config_snapshot(&config, pb->repo)) < 0)
- return ret;
-
-#define config_get(KEY,DST,DFLT) do { \
- ret = git_config_get_int64(&val, config, KEY); \
- if (!ret) { \
- if (!git__is_sizet(val)) { \
- git_error_set(GIT_ERROR_CONFIG, \
- "configuration value '%s' is too large", KEY); \
- ret = -1; \
- goto out; \
- } \
- (DST) = (size_t)val; \
- } else if (ret == GIT_ENOTFOUND) { \
- (DST) = (DFLT); \
- ret = 0; \
- } else if (ret < 0) goto out; } while (0)
-
- config_get("pack.deltaCacheSize", pb->max_delta_cache_size,
- GIT_PACK_DELTA_CACHE_SIZE);
- config_get("pack.deltaCacheLimit", pb->cache_max_small_delta_size,
- GIT_PACK_DELTA_CACHE_LIMIT);
- config_get("pack.deltaCacheSize", pb->big_file_threshold,
- GIT_PACK_BIG_FILE_THRESHOLD);
- config_get("pack.windowMemory", pb->window_memory_limit, 0);
-
-#undef config_get
-
-out:
- git_config_free(config);
-
- return ret;
-}
-
-int git_packbuilder_new(git_packbuilder **out, git_repository *repo)
-{
- git_packbuilder *pb;
-
- *out = NULL;
-
- pb = git__calloc(1, sizeof(*pb));
- GIT_ERROR_CHECK_ALLOC(pb);
-
- if (git_oidmap_new(&pb->object_ix) < 0 ||
- git_oidmap_new(&pb->walk_objects) < 0 ||
- git_pool_init(&pb->object_pool, sizeof(struct walk_object)) < 0)
- goto on_error;
-
- pb->repo = repo;
- pb->nr_threads = 1; /* do not spawn any thread by default */
-
- if (git_hash_ctx_init(&pb->ctx, GIT_HASH_ALGORITHM_SHA1) < 0 ||
- git_zstream_init(&pb->zstream, GIT_ZSTREAM_DEFLATE) < 0 ||
- git_repository_odb(&pb->odb, repo) < 0 ||
- packbuilder_config(pb) < 0)
- goto on_error;
-
-#ifdef GIT_THREADS
-
- if (git_mutex_init(&pb->cache_mutex) ||
- git_mutex_init(&pb->progress_mutex) ||
- git_cond_init(&pb->progress_cond))
- {
- git_error_set(GIT_ERROR_OS, "failed to initialize packbuilder mutex");
- goto on_error;
- }
-
-#endif
-
- *out = pb;
- return 0;
-
-on_error:
- git_packbuilder_free(pb);
- return -1;
-}
-
-unsigned int git_packbuilder_set_threads(git_packbuilder *pb, unsigned int n)
-{
- GIT_ASSERT_ARG(pb);
-
-#ifdef GIT_THREADS
- pb->nr_threads = n;
-#else
- GIT_UNUSED(n);
- GIT_ASSERT(pb->nr_threads == 1);
-#endif
-
- return pb->nr_threads;
-}
-
-static int rehash(git_packbuilder *pb)
-{
- git_pobject *po;
- size_t i;
-
- git_oidmap_clear(pb->object_ix);
-
- for (i = 0, po = pb->object_list; i < pb->nr_objects; i++, po++) {
- if (git_oidmap_set(pb->object_ix, &po->id, po) < 0)
- return -1;
- }
-
- return 0;
-}
-
-int git_packbuilder_insert(git_packbuilder *pb, const git_oid *oid,
- const char *name)
-{
- git_pobject *po;
- size_t newsize;
- int ret;
-
- GIT_ASSERT_ARG(pb);
- GIT_ASSERT_ARG(oid);
-
- /* If the object already exists in the hash table, then we don't
- * have any work to do */
- if (git_oidmap_exists(pb->object_ix, oid))
- return 0;
-
- if (pb->nr_objects >= pb->nr_alloc) {
- GIT_ERROR_CHECK_ALLOC_ADD(&newsize, pb->nr_alloc, 1024);
- GIT_ERROR_CHECK_ALLOC_MULTIPLY(&newsize, newsize / 2, 3);
-
- if (!git__is_uint32(newsize)) {
- git_error_set(GIT_ERROR_NOMEMORY, "packfile too large to fit in memory.");
- return -1;
- }
-
- pb->nr_alloc = newsize;
-
- pb->object_list = git__reallocarray(pb->object_list,
- pb->nr_alloc, sizeof(*po));
- GIT_ERROR_CHECK_ALLOC(pb->object_list);
-
- if (rehash(pb) < 0)
- return -1;
- }
-
- po = pb->object_list + pb->nr_objects;
- memset(po, 0x0, sizeof(*po));
-
- if ((ret = git_odb_read_header(&po->size, &po->type, pb->odb, oid)) < 0)
- return ret;
-
- pb->nr_objects++;
- git_oid_cpy(&po->id, oid);
- po->hash = name_hash(name);
-
- if (git_oidmap_set(pb->object_ix, &po->id, po) < 0) {
- git_error_set_oom();
- return -1;
- }
-
- pb->done = false;
-
- if (pb->progress_cb) {
- double current_time = git__timer();
- double elapsed = current_time - pb->last_progress_report_time;
-
- if (elapsed < 0 || elapsed >= MIN_PROGRESS_UPDATE_INTERVAL) {
- pb->last_progress_report_time = current_time;
-
- ret = pb->progress_cb(
- GIT_PACKBUILDER_ADDING_OBJECTS,
- pb->nr_objects, 0, pb->progress_cb_payload);
-
- if (ret)
- return git_error_set_after_callback(ret);
- }
- }
-
- return 0;
-}
-
-static int get_delta(void **out, git_odb *odb, git_pobject *po)
-{
- git_odb_object *src = NULL, *trg = NULL;
- size_t delta_size;
- void *delta_buf;
- int error;
-
- *out = NULL;
-
- if (git_odb_read(&src, odb, &po->delta->id) < 0 ||
- git_odb_read(&trg, odb, &po->id) < 0)
- goto on_error;
-
- error = git_delta(&delta_buf, &delta_size,
- git_odb_object_data(src), git_odb_object_size(src),
- git_odb_object_data(trg), git_odb_object_size(trg),
- 0);
-
- if (error < 0 && error != GIT_EBUFS)
- goto on_error;
-
- if (error == GIT_EBUFS || delta_size != po->delta_size) {
- git_error_set(GIT_ERROR_INVALID, "delta size changed");
- goto on_error;
- }
-
- *out = delta_buf;
-
- git_odb_object_free(src);
- git_odb_object_free(trg);
- return 0;
-
-on_error:
- git_odb_object_free(src);
- git_odb_object_free(trg);
- return -1;
-}
-
-static int write_object(
- git_packbuilder *pb,
- git_pobject *po,
- int (*write_cb)(void *buf, size_t size, void *cb_data),
- void *cb_data)
-{
- git_odb_object *obj = NULL;
- git_object_t type;
- unsigned char hdr[10], *zbuf = NULL;
- void *data = NULL;
- size_t hdr_len, zbuf_len = COMPRESS_BUFLEN, data_len;
- int error;
-
- /*
- * If we have a delta base, let's use the delta to save space.
- * Otherwise load the whole object. 'data' ends up pointing to
- * whatever data we want to put into the packfile.
- */
- if (po->delta) {
- if (po->delta_data)
- data = po->delta_data;
- else if ((error = get_delta(&data, pb->odb, po)) < 0)
- goto done;
-
- data_len = po->delta_size;
- type = GIT_OBJECT_REF_DELTA;
- } else {
- if ((error = git_odb_read(&obj, pb->odb, &po->id)) < 0)
- goto done;
-
- data = (void *)git_odb_object_data(obj);
- data_len = git_odb_object_size(obj);
- type = git_odb_object_type(obj);
- }
-
- /* Write header */
- if ((error = git_packfile__object_header(&hdr_len, hdr, data_len, type)) < 0 ||
- (error = write_cb(hdr, hdr_len, cb_data)) < 0 ||
- (error = git_hash_update(&pb->ctx, hdr, hdr_len)) < 0)
- goto done;
-
- if (type == GIT_OBJECT_REF_DELTA) {
- if ((error = write_cb(po->delta->id.id, GIT_OID_RAWSZ, cb_data)) < 0 ||
- (error = git_hash_update(&pb->ctx, po->delta->id.id, GIT_OID_RAWSZ)) < 0)
- goto done;
- }
-
- /* Write data */
- if (po->z_delta_size) {
- data_len = po->z_delta_size;
-
- if ((error = write_cb(data, data_len, cb_data)) < 0 ||
- (error = git_hash_update(&pb->ctx, data, data_len)) < 0)
- goto done;
- } else {
- zbuf = git__malloc(zbuf_len);
- GIT_ERROR_CHECK_ALLOC(zbuf);
-
- git_zstream_reset(&pb->zstream);
-
- if ((error = git_zstream_set_input(&pb->zstream, data, data_len)) < 0)
- goto done;
-
- while (!git_zstream_done(&pb->zstream)) {
- if ((error = git_zstream_get_output(zbuf, &zbuf_len, &pb->zstream)) < 0 ||
- (error = write_cb(zbuf, zbuf_len, cb_data)) < 0 ||
- (error = git_hash_update(&pb->ctx, zbuf, zbuf_len)) < 0)
- goto done;
-
- zbuf_len = COMPRESS_BUFLEN; /* reuse buffer */
- }
- }
-
- /*
- * If po->delta is true, data is a delta and it is our
- * responsibility to free it (otherwise it's a git_object's
- * data). We set po->delta_data to NULL in case we got the
- * data from there instead of get_delta(). If we didn't,
- * there's no harm.
- */
- if (po->delta) {
- git__free(data);
- po->delta_data = NULL;
- }
-
- pb->nr_written++;
-
-done:
- git__free(zbuf);
- git_odb_object_free(obj);
- return error;
-}
-
-enum write_one_status {
- WRITE_ONE_SKIP = -1, /* already written */
- WRITE_ONE_BREAK = 0, /* writing this will bust the limit; not written */
- WRITE_ONE_WRITTEN = 1, /* normal */
- WRITE_ONE_RECURSIVE = 2 /* already scheduled to be written */
-};
-
-static int write_one(
- enum write_one_status *status,
- git_packbuilder *pb,
- git_pobject *po,
- int (*write_cb)(void *buf, size_t size, void *cb_data),
- void *cb_data)
-{
- int error;
-
- if (po->recursing) {
- *status = WRITE_ONE_RECURSIVE;
- return 0;
- } else if (po->written) {
- *status = WRITE_ONE_SKIP;
- return 0;
- }
-
- if (po->delta) {
- po->recursing = 1;
-
- if ((error = write_one(status, pb, po->delta, write_cb, cb_data)) < 0)
- return error;
-
- /* we cannot depend on this one */
- if (*status == WRITE_ONE_RECURSIVE)
- po->delta = NULL;
- }
-
- *status = WRITE_ONE_WRITTEN;
- po->written = 1;
- po->recursing = 0;
-
- return write_object(pb, po, write_cb, cb_data);
-}
-
-GIT_INLINE(void) add_to_write_order(git_pobject **wo, size_t *endp,
- git_pobject *po)
-{
- if (po->filled)
- return;
- wo[(*endp)++] = po;
- po->filled = 1;
-}
-
-static void add_descendants_to_write_order(git_pobject **wo, size_t *endp,
- git_pobject *po)
-{
- int add_to_order = 1;
- while (po) {
- if (add_to_order) {
- git_pobject *s;
- /* add this node... */
- add_to_write_order(wo, endp, po);
- /* all its siblings... */
- for (s = po->delta_sibling; s; s = s->delta_sibling) {
- add_to_write_order(wo, endp, s);
- }
- }
- /* drop down a level to add left subtree nodes if possible */
- if (po->delta_child) {
- add_to_order = 1;
- po = po->delta_child;
- } else {
- add_to_order = 0;
- /* our sibling might have some children, it is next */
- if (po->delta_sibling) {
- po = po->delta_sibling;
- continue;
- }
- /* go back to our parent node */
- po = po->delta;
- while (po && !po->delta_sibling) {
- /* we're on the right side of a subtree, keep
- * going up until we can go right again */
- po = po->delta;
- }
- if (!po) {
- /* done- we hit our original root node */
- return;
- }
- /* pass it off to sibling at this level */
- po = po->delta_sibling;
- }
- };
-}
-
-static void add_family_to_write_order(git_pobject **wo, size_t *endp,
- git_pobject *po)
-{
- git_pobject *root;
-
- for (root = po; root->delta; root = root->delta)
- ; /* nothing */
- add_descendants_to_write_order(wo, endp, root);
-}
-
-static int cb_tag_foreach(const char *name, git_oid *oid, void *data)
-{
- git_packbuilder *pb = data;
- git_pobject *po;
-
- GIT_UNUSED(name);
-
- if ((po = git_oidmap_get(pb->object_ix, oid)) == NULL)
- return 0;
-
- po->tagged = 1;
-
- /* TODO: peel objects */
-
- return 0;
-}
-
-static int compute_write_order(git_pobject ***out, git_packbuilder *pb)
-{
- size_t i, wo_end, last_untagged;
- git_pobject **wo;
-
- *out = NULL;
-
- if (!pb->nr_objects)
- return 0;
-
- if ((wo = git__mallocarray(pb->nr_objects, sizeof(*wo))) == NULL)
- return -1;
-
- for (i = 0; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- po->tagged = 0;
- po->filled = 0;
- po->delta_child = NULL;
- po->delta_sibling = NULL;
- }
-
- /*
- * Fully connect delta_child/delta_sibling network.
- * Make sure delta_sibling is sorted in the original
- * recency order.
- */
- for (i = pb->nr_objects; i > 0;) {
- git_pobject *po = &pb->object_list[--i];
- if (!po->delta)
- continue;
- /* Mark me as the first child */
- po->delta_sibling = po->delta->delta_child;
- po->delta->delta_child = po;
- }
-
- /*
- * Mark objects that are at the tip of tags.
- */
- if (git_tag_foreach(pb->repo, &cb_tag_foreach, pb) < 0) {
- git__free(wo);
- return -1;
- }
-
- /*
- * Give the objects in the original recency order until
- * we see a tagged tip.
- */
- for (i = wo_end = 0; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- if (po->tagged)
- break;
- add_to_write_order(wo, &wo_end, po);
- }
- last_untagged = i;
-
- /*
- * Then fill all the tagged tips.
- */
- for (; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- if (po->tagged)
- add_to_write_order(wo, &wo_end, po);
- }
-
- /*
- * And then all remaining commits and tags.
- */
- for (i = last_untagged; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- if (po->type != GIT_OBJECT_COMMIT &&
- po->type != GIT_OBJECT_TAG)
- continue;
- add_to_write_order(wo, &wo_end, po);
- }
-
- /*
- * And then all the trees.
- */
- for (i = last_untagged; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- if (po->type != GIT_OBJECT_TREE)
- continue;
- add_to_write_order(wo, &wo_end, po);
- }
-
- /*
- * Finally all the rest in really tight order
- */
- for (i = last_untagged; i < pb->nr_objects; i++) {
- git_pobject *po = pb->object_list + i;
- if (!po->filled)
- add_family_to_write_order(wo, &wo_end, po);
- }
-
- if (wo_end != pb->nr_objects) {
- git__free(wo);
- git_error_set(GIT_ERROR_INVALID, "invalid write order");
- return -1;
- }
-
- *out = wo;
- return 0;
-}
-
-static int write_pack(git_packbuilder *pb,
- int (*write_cb)(void *buf, size_t size, void *cb_data),
- void *cb_data)
-{
- git_pobject **write_order;
- git_pobject *po;
- enum write_one_status status;
- struct git_pack_header ph;
- git_oid entry_oid;
- size_t i = 0;
- int error;
-
- if ((error = compute_write_order(&write_order, pb)) < 0)
- return error;
-
- if (!git__is_uint32(pb->nr_objects)) {
- git_error_set(GIT_ERROR_INVALID, "too many objects");
- error = -1;
- goto done;
- }
-
- /* Write pack header */
- ph.hdr_signature = htonl(PACK_SIGNATURE);
- ph.hdr_version = htonl(PACK_VERSION);
- ph.hdr_entries = htonl(pb->nr_objects);
-
- if ((error = write_cb(&ph, sizeof(ph), cb_data)) < 0 ||
- (error = git_hash_update(&pb->ctx, &ph, sizeof(ph))) < 0)
- goto done;
-
- pb->nr_remaining = pb->nr_objects;
- do {
- pb->nr_written = 0;
- for ( ; i < pb->nr_objects; ++i) {
- po = write_order[i];
-
- if ((error = write_one(&status, pb, po, write_cb, cb_data)) < 0)
- goto done;
- }
-
- pb->nr_remaining -= pb->nr_written;
- } while (pb->nr_remaining && i < pb->nr_objects);
-
- if ((error = git_hash_final(entry_oid.id, &pb->ctx)) < 0)
- goto done;
-
- error = write_cb(entry_oid.id, GIT_OID_RAWSZ, cb_data);
-
-done:
- /* if callback cancelled writing, we must still free delta_data */
- for ( ; i < pb->nr_objects; ++i) {
- po = write_order[i];
- if (po->delta_data) {
- git__free(po->delta_data);
- po->delta_data = NULL;
- }
- }
-
- git__free(write_order);
- return error;
-}
-
-static int write_pack_buf(void *buf, size_t size, void *data)
-{
- git_str *b = (git_str *)data;
- return git_str_put(b, buf, size);
-}
-
-static int type_size_sort(const void *_a, const void *_b)
-{
- const git_pobject *a = (git_pobject *)_a;
- const git_pobject *b = (git_pobject *)_b;
-
- if (a->type > b->type)
- return -1;
- if (a->type < b->type)
- return 1;
- if (a->hash > b->hash)
- return -1;
- if (a->hash < b->hash)
- return 1;
- /*
- * TODO
- *
- if (a->preferred_base > b->preferred_base)
- return -1;
- if (a->preferred_base < b->preferred_base)
- return 1;
- */
- if (a->size > b->size)
- return -1;
- if (a->size < b->size)
- return 1;
- return a < b ? -1 : (a > b); /* newest first */
-}
-
-static int delta_cacheable(
- git_packbuilder *pb,
- size_t src_size,
- size_t trg_size,
- size_t delta_size)
-{
- size_t new_size;
-
- if (git__add_sizet_overflow(&new_size, pb->delta_cache_size, delta_size))
- return 0;
-
- if (pb->max_delta_cache_size && new_size > pb->max_delta_cache_size)
- return 0;
-
- if (delta_size < pb->cache_max_small_delta_size)
- return 1;
-
- /* cache delta, if objects are large enough compared to delta size */
- if ((src_size >> 20) + (trg_size >> 21) > (delta_size >> 10))
- return 1;
-
- return 0;
-}
-
-static int try_delta(git_packbuilder *pb, struct unpacked *trg,
- struct unpacked *src, size_t max_depth,
- size_t *mem_usage, int *ret)
-{
- git_pobject *trg_object = trg->object;
- git_pobject *src_object = src->object;
- git_odb_object *obj;
- size_t trg_size, src_size, delta_size, sizediff, max_size, sz;
- size_t ref_depth;
- void *delta_buf;
-
- /* Don't bother doing diffs between different types */
- if (trg_object->type != src_object->type) {
- *ret = -1;
- return 0;
- }
-
- *ret = 0;
-
- /* TODO: support reuse-delta */
-
- /* Let's not bust the allowed depth. */
- if (src->depth >= max_depth)
- return 0;
-
- /* Now some size filtering heuristics. */
- trg_size = trg_object->size;
- if (!trg_object->delta) {
- max_size = trg_size/2 - 20;
- ref_depth = 1;
- } else {
- max_size = trg_object->delta_size;
- ref_depth = trg->depth;
- }
-
- max_size = (uint64_t)max_size * (max_depth - src->depth) /
- (max_depth - ref_depth + 1);
- if (max_size == 0)
- return 0;
-
- src_size = src_object->size;
- sizediff = src_size < trg_size ? trg_size - src_size : 0;
- if (sizediff >= max_size)
- return 0;
- if (trg_size < src_size / 32)
- return 0;
-
- /* Load data if not already done */
- if (!trg->data) {
- if (git_odb_read(&obj, pb->odb, &trg_object->id) < 0)
- return -1;
-
- sz = git_odb_object_size(obj);
- trg->data = git__malloc(sz);
- GIT_ERROR_CHECK_ALLOC(trg->data);
- memcpy(trg->data, git_odb_object_data(obj), sz);
-
- git_odb_object_free(obj);
-
- if (sz != trg_size) {
- git_error_set(GIT_ERROR_INVALID,
- "inconsistent target object length");
- return -1;
- }
-
- *mem_usage += sz;
- }
- if (!src->data) {
- size_t obj_sz;
-
- if (git_odb_read(&obj, pb->odb, &src_object->id) < 0 ||
- !git__is_ulong(obj_sz = git_odb_object_size(obj)))
- return -1;
-
- sz = obj_sz;
- src->data = git__malloc(sz);
- GIT_ERROR_CHECK_ALLOC(src->data);
- memcpy(src->data, git_odb_object_data(obj), sz);
-
- git_odb_object_free(obj);
-
- if (sz != src_size) {
- git_error_set(GIT_ERROR_INVALID,
- "inconsistent source object length");
- return -1;
- }
-
- *mem_usage += sz;
- }
- if (!src->index) {
- if (git_delta_index_init(&src->index, src->data, src_size) < 0)
- return 0; /* suboptimal pack - out of memory */
-
- *mem_usage += git_delta_index_size(src->index);
- }
-
- if (git_delta_create_from_index(&delta_buf, &delta_size, src->index, trg->data, trg_size,
- max_size) < 0)
- return 0;
-
- if (trg_object->delta) {
- /* Prefer only shallower same-sized deltas. */
- if (delta_size == trg_object->delta_size &&
- src->depth + 1 >= trg->depth) {
- git__free(delta_buf);
- return 0;
- }
- }
-
- GIT_ASSERT(git_packbuilder__cache_lock(pb) == 0);
-
- if (trg_object->delta_data) {
- git__free(trg_object->delta_data);
- GIT_ASSERT(pb->delta_cache_size >= trg_object->delta_size);
- pb->delta_cache_size -= trg_object->delta_size;
- trg_object->delta_data = NULL;
- }
- if (delta_cacheable(pb, src_size, trg_size, delta_size)) {
- bool overflow = git__add_sizet_overflow(
- &pb->delta_cache_size, pb->delta_cache_size, delta_size);
-
- GIT_ASSERT(git_packbuilder__cache_unlock(pb) == 0);
-
- if (overflow) {
- git__free(delta_buf);
- return -1;
- }
-
- trg_object->delta_data = git__realloc(delta_buf, delta_size);
- GIT_ERROR_CHECK_ALLOC(trg_object->delta_data);
- } else {
- /* create delta when writing the pack */
- GIT_ASSERT(git_packbuilder__cache_unlock(pb) == 0);
- git__free(delta_buf);
- }
-
- trg_object->delta = src_object;
- trg_object->delta_size = delta_size;
- trg->depth = src->depth + 1;
-
- *ret = 1;
- return 0;
-}
-
-static size_t check_delta_limit(git_pobject *me, size_t n)
-{
- git_pobject *child = me->delta_child;
- size_t m = n;
-
- while (child) {
- size_t c = check_delta_limit(child, n + 1);
- if (m < c)
- m = c;
- child = child->delta_sibling;
- }
- return m;
-}
-
-static size_t free_unpacked(struct unpacked *n)
-{
- size_t freed_mem = 0;
-
- if (n->index) {
- freed_mem += git_delta_index_size(n->index);
- git_delta_index_free(n->index);
- }
- n->index = NULL;
-
- if (n->data) {
- freed_mem += n->object->size;
- git__free(n->data);
- n->data = NULL;
- }
- n->object = NULL;
- n->depth = 0;
- return freed_mem;
-}
-
-static int report_delta_progress(
- git_packbuilder *pb, uint32_t count, bool force)
-{
- int ret;
-
- if (pb->progress_cb) {
- double current_time = git__timer();
- double elapsed = current_time - pb->last_progress_report_time;
-
- if (force || elapsed < 0 || elapsed >= MIN_PROGRESS_UPDATE_INTERVAL) {
- pb->last_progress_report_time = current_time;
-
- ret = pb->progress_cb(
- GIT_PACKBUILDER_DELTAFICATION,
- count, pb->nr_objects, pb->progress_cb_payload);
-
- if (ret)
- return git_error_set_after_callback(ret);
- }
- }
-
- return 0;
-}
-
-static int find_deltas(git_packbuilder *pb, git_pobject **list,
- size_t *list_size, size_t window, size_t depth)
-{
- git_pobject *po;
- git_str zbuf = GIT_STR_INIT;
- struct unpacked *array;
- size_t idx = 0, count = 0;
- size_t mem_usage = 0;
- size_t i;
- int error = -1;
-
- array = git__calloc(window, sizeof(struct unpacked));
- GIT_ERROR_CHECK_ALLOC(array);
-
- for (;;) {
- struct unpacked *n = array + idx;
- size_t max_depth, j, best_base = SIZE_MAX;
-
- GIT_ASSERT(git_packbuilder__progress_lock(pb) == 0);
- if (!*list_size) {
- GIT_ASSERT(git_packbuilder__progress_unlock(pb) == 0);
- break;
- }
-
- pb->nr_deltified += 1;
- report_delta_progress(pb, pb->nr_deltified, false);
-
- po = *list++;
- (*list_size)--;
- GIT_ASSERT(git_packbuilder__progress_unlock(pb) == 0);
-
- mem_usage -= free_unpacked(n);
- n->object = po;
-
- while (pb->window_memory_limit &&
- mem_usage > pb->window_memory_limit &&
- count > 1) {
- size_t tail = (idx + window - count) % window;
- mem_usage -= free_unpacked(array + tail);
- count--;
- }
-
- /*
- * If the current object is at pack edge, take the depth the
- * objects that depend on the current object into account
- * otherwise they would become too deep.
- */
- max_depth = depth;
- if (po->delta_child) {
- size_t delta_limit = check_delta_limit(po, 0);
-
- if (delta_limit > max_depth)
- goto next;
-
- max_depth -= delta_limit;
- }
-
- j = window;
- while (--j > 0) {
- int ret;
- size_t other_idx = idx + j;
- struct unpacked *m;
-
- if (other_idx >= window)
- other_idx -= window;
-
- m = array + other_idx;
- if (!m->object)
- break;
-
- if (try_delta(pb, n, m, max_depth, &mem_usage, &ret) < 0)
- goto on_error;
- if (ret < 0)
- break;
- else if (ret > 0)
- best_base = other_idx;
- }
-
- /*
- * If we decided to cache the delta data, then it is best
- * to compress it right away. First because we have to do
- * it anyway, and doing it here while we're threaded will
- * save a lot of time in the non threaded write phase,
- * as well as allow for caching more deltas within
- * the same cache size limit.
- * ...
- * But only if not writing to stdout, since in that case
- * the network is most likely throttling writes anyway,
- * and therefore it is best to go to the write phase ASAP
- * instead, as we can afford spending more time compressing
- * between writes at that moment.
- */
- if (po->delta_data) {
- if (git_zstream_deflatebuf(&zbuf, po->delta_data, po->delta_size) < 0)
- goto on_error;
-
- git__free(po->delta_data);
- po->delta_data = git__malloc(zbuf.size);
- GIT_ERROR_CHECK_ALLOC(po->delta_data);
-
- memcpy(po->delta_data, zbuf.ptr, zbuf.size);
- po->z_delta_size = zbuf.size;
- git_str_clear(&zbuf);
-
- GIT_ASSERT(git_packbuilder__cache_lock(pb) == 0);
- pb->delta_cache_size -= po->delta_size;
- pb->delta_cache_size += po->z_delta_size;
- GIT_ASSERT(git_packbuilder__cache_unlock(pb) == 0);
- }
-
- /*
- * If we made n a delta, and if n is already at max
- * depth, leaving it in the window is pointless. we
- * should evict it first.
- */
- if (po->delta && max_depth <= n->depth)
- continue;
-
- /*
- * Move the best delta base up in the window, after the
- * currently deltified object, to keep it longer. It will
- * be the first base object to be attempted next.
- */
- if (po->delta) {
- struct unpacked swap = array[best_base];
- size_t dist = (window + idx - best_base) % window;
- size_t dst = best_base;
- while (dist--) {
- size_t src = (dst + 1) % window;
- array[dst] = array[src];
- dst = src;
- }
- array[dst] = swap;
- }
-
- next:
- idx++;
- if (count + 1 < window)
- count++;
- if (idx >= window)
- idx = 0;
- }
- error = 0;
-
-on_error:
- for (i = 0; i < window; ++i) {
- git__free(array[i].index);
- git__free(array[i].data);
- }
- git__free(array);
- git_str_dispose(&zbuf);
-
- return error;
-}
-
-#ifdef GIT_THREADS
-
-struct thread_params {
- git_thread thread;
- git_packbuilder *pb;
-
- git_pobject **list;
-
- git_cond cond;
- git_mutex mutex;
-
- size_t list_size;
- size_t remaining;
-
- size_t window;
- size_t depth;
- size_t working;
- size_t data_ready;
-};
-
-static void *threaded_find_deltas(void *arg)
-{
- struct thread_params *me = arg;
-
- while (me->remaining) {
- if (find_deltas(me->pb, me->list, &me->remaining,
- me->window, me->depth) < 0) {
- ; /* TODO */
- }
-
- GIT_ASSERT_WITH_RETVAL(git_packbuilder__progress_lock(me->pb) == 0, NULL);
- me->working = 0;
- git_cond_signal(&me->pb->progress_cond);
- GIT_ASSERT_WITH_RETVAL(git_packbuilder__progress_unlock(me->pb) == 0, NULL);
-
- if (git_mutex_lock(&me->mutex)) {
- git_error_set(GIT_ERROR_THREAD, "unable to lock packfile condition mutex");
- return NULL;
- }
-
- while (!me->data_ready)
- git_cond_wait(&me->cond, &me->mutex);
-
- /*
- * We must not set ->data_ready before we wait on the
- * condition because the main thread may have set it to 1
- * before we get here. In order to be sure that new
- * work is available if we see 1 in ->data_ready, it
- * was initialized to 0 before this thread was spawned
- * and we reset it to 0 right away.
- */
- me->data_ready = 0;
- git_mutex_unlock(&me->mutex);
- }
- /* leave ->working 1 so that this doesn't get more work assigned */
- return NULL;
-}
-
-static int ll_find_deltas(git_packbuilder *pb, git_pobject **list,
- size_t list_size, size_t window, size_t depth)
-{
- struct thread_params *p;
- size_t i;
- int ret, active_threads = 0;
-
- if (!pb->nr_threads)
- pb->nr_threads = git__online_cpus();
-
- if (pb->nr_threads <= 1) {
- find_deltas(pb, list, &list_size, window, depth);
- return 0;
- }
-
- p = git__mallocarray(pb->nr_threads, sizeof(*p));
- GIT_ERROR_CHECK_ALLOC(p);
-
- /* Partition the work among the threads */
- for (i = 0; i < pb->nr_threads; ++i) {
- size_t sub_size = list_size / (pb->nr_threads - i);
-
- /* don't use too small segments or no deltas will be found */
- if (sub_size < 2*window && i+1 < pb->nr_threads)
- sub_size = 0;
-
- p[i].pb = pb;
- p[i].window = window;
- p[i].depth = depth;
- p[i].working = 1;
- p[i].data_ready = 0;
-
- /* try to split chunks on "path" boundaries */
- while (sub_size && sub_size < list_size &&
- list[sub_size]->hash &&
- list[sub_size]->hash == list[sub_size-1]->hash)
- sub_size++;
-
- p[i].list = list;
- p[i].list_size = sub_size;
- p[i].remaining = sub_size;
-
- list += sub_size;
- list_size -= sub_size;
- }
-
- /* Start work threads */
- for (i = 0; i < pb->nr_threads; ++i) {
- if (!p[i].list_size)
- continue;
-
- git_mutex_init(&p[i].mutex);
- git_cond_init(&p[i].cond);
-
- ret = git_thread_create(&p[i].thread,
- threaded_find_deltas, &p[i]);
- if (ret) {
- git_error_set(GIT_ERROR_THREAD, "unable to create thread");
- return -1;
- }
- active_threads++;
- }
-
- /*
- * Now let's wait for work completion. Each time a thread is done
- * with its work, we steal half of the remaining work from the
- * thread with the largest number of unprocessed objects and give
- * it to that newly idle thread. This ensure good load balancing
- * until the remaining object list segments are simply too short
- * to be worth splitting anymore.
- */
- while (active_threads) {
- struct thread_params *target = NULL;
- struct thread_params *victim = NULL;
- size_t sub_size = 0;
-
- /* Start by locating a thread that has transitioned its
- * 'working' flag from 1 -> 0. This indicates that it is
- * ready to receive more work using our work-stealing
- * algorithm. */
- GIT_ASSERT(git_packbuilder__progress_lock(pb) == 0);
- for (;;) {
- for (i = 0; !target && i < pb->nr_threads; i++)
- if (!p[i].working)
- target = &p[i];
- if (target)
- break;
- git_cond_wait(&pb->progress_cond, &pb->progress_mutex);
- }
-
- /* At this point we hold the progress lock and have located
- * a thread to receive more work. We still need to locate a
- * thread from which to steal work (the victim). */
- for (i = 0; i < pb->nr_threads; i++)
- if (p[i].remaining > 2*window &&
- (!victim || victim->remaining < p[i].remaining))
- victim = &p[i];
-
- if (victim) {
- sub_size = victim->remaining / 2;
- list = victim->list + victim->list_size - sub_size;
- while (sub_size && list[0]->hash &&
- list[0]->hash == list[-1]->hash) {
- list++;
- sub_size--;
- }
- if (!sub_size) {
- /*
- * It is possible for some "paths" to have
- * so many objects that no hash boundary
- * might be found. Let's just steal the
- * exact half in that case.
- */
- sub_size = victim->remaining / 2;
- list -= sub_size;
- }
- target->list = list;
- victim->list_size -= sub_size;
- victim->remaining -= sub_size;
- }
- target->list_size = sub_size;
- target->remaining = sub_size;
- target->working = 1;
- GIT_ASSERT(git_packbuilder__progress_unlock(pb) == 0);
-
- if (git_mutex_lock(&target->mutex)) {
- git_error_set(GIT_ERROR_THREAD, "unable to lock packfile condition mutex");
- git__free(p);
- return -1;
- }
-
- target->data_ready = 1;
- git_cond_signal(&target->cond);
- git_mutex_unlock(&target->mutex);
-
- if (!sub_size) {
- git_thread_join(&target->thread, NULL);
- git_cond_free(&target->cond);
- git_mutex_free(&target->mutex);
- active_threads--;
- }
- }
-
- git__free(p);
- return 0;
-}
-
-#else
-#define ll_find_deltas(pb, l, ls, w, d) find_deltas(pb, l, &ls, w, d)
-#endif
-
-int git_packbuilder__prepare(git_packbuilder *pb)
-{
- git_pobject **delta_list;
- size_t i, n = 0;
-
- if (pb->nr_objects == 0 || pb->done)
- return 0; /* nothing to do */
-
- /*
- * Although we do not report progress during deltafication, we
- * at least report that we are in the deltafication stage
- */
- if (pb->progress_cb)
- pb->progress_cb(GIT_PACKBUILDER_DELTAFICATION, 0, pb->nr_objects, pb->progress_cb_payload);
-
- delta_list = git__mallocarray(pb->nr_objects, sizeof(*delta_list));
- GIT_ERROR_CHECK_ALLOC(delta_list);
-
- for (i = 0; i < pb->nr_objects; ++i) {
- git_pobject *po = pb->object_list + i;
-
- /* Make sure the item is within our size limits */
- if (po->size < 50 || po->size > pb->big_file_threshold)
- continue;
-
- delta_list[n++] = po;
- }
-
- if (n > 1) {
- git__tsort((void **)delta_list, n, type_size_sort);
- if (ll_find_deltas(pb, delta_list, n,
- GIT_PACK_WINDOW + 1,
- GIT_PACK_DEPTH) < 0) {
- git__free(delta_list);
- return -1;
- }
- }
-
- report_delta_progress(pb, pb->nr_objects, true);
-
- pb->done = true;
- git__free(delta_list);
- return 0;
-}
-
-#define PREPARE_PACK if (git_packbuilder__prepare(pb) < 0) { return -1; }
-
-int git_packbuilder_foreach(git_packbuilder *pb, int (*cb)(void *buf, size_t size, void *payload), void *payload)
-{
- PREPARE_PACK;
- return write_pack(pb, cb, payload);
-}
-
-int git_packbuilder__write_buf(git_str *buf, git_packbuilder *pb)
-{
- PREPARE_PACK;
-
- return write_pack(pb, &write_pack_buf, buf);
-}
-
-int git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb)
-{
- GIT_BUF_WRAP_PRIVATE(buf, git_packbuilder__write_buf, pb);
-}
-
-static int write_cb(void *buf, size_t len, void *payload)
-{
- struct pack_write_context *ctx = payload;
- return git_indexer_append(ctx->indexer, buf, len, ctx->stats);
-}
-
-int git_packbuilder_write(
- git_packbuilder *pb,
- const char *path,
- unsigned int mode,
- git_indexer_progress_cb progress_cb,
- void *progress_cb_payload)
-{
- int error = -1;
- git_str object_path = GIT_STR_INIT;
- git_indexer_options opts = GIT_INDEXER_OPTIONS_INIT;
- git_indexer *indexer = NULL;
- git_indexer_progress stats;
- struct pack_write_context ctx;
- int t;
-
- PREPARE_PACK;
-
- if (path == NULL) {
- if ((error = git_repository__item_path(&object_path, pb->repo, GIT_REPOSITORY_ITEM_OBJECTS)) < 0)
- goto cleanup;
- if ((error = git_str_joinpath(&object_path, git_str_cstr(&object_path), "pack")) < 0)
- goto cleanup;
- path = git_str_cstr(&object_path);
- }
-
- opts.progress_cb = progress_cb;
- opts.progress_cb_payload = progress_cb_payload;
-
- if ((error = git_indexer_new(&indexer, path, mode, pb->odb, &opts)) < 0)
- goto cleanup;
-
- if (!git_repository__configmap_lookup(&t, pb->repo, GIT_CONFIGMAP_FSYNCOBJECTFILES) && t)
- git_indexer__set_fsync(indexer, 1);
-
- ctx.indexer = indexer;
- ctx.stats = &stats;
-
- if ((error = git_packbuilder_foreach(pb, write_cb, &ctx)) < 0)
- goto cleanup;
-
- if ((error = git_indexer_commit(indexer, &stats)) < 0)
- goto cleanup;
-
-#ifndef GIT_DEPRECATE_HARD
- git_oid_cpy(&pb->pack_oid, git_indexer_hash(indexer));
-#endif
-
- pb->pack_name = git__strdup(git_indexer_name(indexer));
- GIT_ERROR_CHECK_ALLOC(pb->pack_name);
-
-cleanup:
- git_indexer_free(indexer);
- git_str_dispose(&object_path);
- return error;
-}
-
-#undef PREPARE_PACK
-
-#ifndef GIT_DEPRECATE_HARD
-const git_oid *git_packbuilder_hash(git_packbuilder *pb)
-{
- return &pb->pack_oid;
-}
-#endif
-
-const char *git_packbuilder_name(git_packbuilder *pb)
-{
- return pb->pack_name;
-}
-
-
-static int cb_tree_walk(
- const char *root, const git_tree_entry *entry, void *payload)
-{
- int error;
- struct tree_walk_context *ctx = payload;
-
- /* A commit inside a tree represents a submodule commit and should be skipped. */
- if (git_tree_entry_type(entry) == GIT_OBJECT_COMMIT)
- return 0;
-
- if (!(error = git_str_sets(&ctx->buf, root)) &&
- !(error = git_str_puts(&ctx->buf, git_tree_entry_name(entry))))
- error = git_packbuilder_insert(
- ctx->pb, git_tree_entry_id(entry), git_str_cstr(&ctx->buf));
-
- return error;
-}
-
-int git_packbuilder_insert_commit(git_packbuilder *pb, const git_oid *oid)
-{
- git_commit *commit;
-
- if (git_commit_lookup(&commit, pb->repo, oid) < 0 ||
- git_packbuilder_insert(pb, oid, NULL) < 0)
- return -1;
-
- if (git_packbuilder_insert_tree(pb, git_commit_tree_id(commit)) < 0)
- return -1;
-
- git_commit_free(commit);
- return 0;
-}
-
-int git_packbuilder_insert_tree(git_packbuilder *pb, const git_oid *oid)
-{
- int error;
- git_tree *tree = NULL;
- struct tree_walk_context context = { pb, GIT_STR_INIT };
-
- if (!(error = git_tree_lookup(&tree, pb->repo, oid)) &&
- !(error = git_packbuilder_insert(pb, oid, NULL)))
- error = git_tree_walk(tree, GIT_TREEWALK_PRE, cb_tree_walk, &context);
-
- git_tree_free(tree);
- git_str_dispose(&context.buf);
- return error;
-}
-
-int git_packbuilder_insert_recur(git_packbuilder *pb, const git_oid *id, const char *name)
-{
- git_object *obj;
- int error;
-
- GIT_ASSERT_ARG(pb);
- GIT_ASSERT_ARG(id);
-
- if ((error = git_object_lookup(&obj, pb->repo, id, GIT_OBJECT_ANY)) < 0)
- return error;
-
- switch (git_object_type(obj)) {
- case GIT_OBJECT_BLOB:
- error = git_packbuilder_insert(pb, id, name);
- break;
- case GIT_OBJECT_TREE:
- error = git_packbuilder_insert_tree(pb, id);
- break;
- case GIT_OBJECT_COMMIT:
- error = git_packbuilder_insert_commit(pb, id);
- break;
- case GIT_OBJECT_TAG:
- if ((error = git_packbuilder_insert(pb, id, name)) < 0)
- goto cleanup;
- error = git_packbuilder_insert_recur(pb, git_tag_target_id((git_tag *) obj), NULL);
- break;
-
- default:
- git_error_set(GIT_ERROR_INVALID, "unknown object type");
- error = -1;
- }
-
-cleanup:
- git_object_free(obj);
- return error;
-}
-
-size_t git_packbuilder_object_count(git_packbuilder *pb)
-{
- return pb->nr_objects;
-}
-
-size_t git_packbuilder_written(git_packbuilder *pb)
-{
- return pb->nr_written;
-}
-
-static int lookup_walk_object(struct walk_object **out, git_packbuilder *pb, const git_oid *id)
-{
- struct walk_object *obj;
-
- obj = git_pool_mallocz(&pb->object_pool, 1);
- if (!obj) {
- git_error_set_oom();
- return -1;
- }
-
- git_oid_cpy(&obj->id, id);
-
- *out = obj;
- return 0;
-}
-
-static int retrieve_object(struct walk_object **out, git_packbuilder *pb, const git_oid *id)
-{
- struct walk_object *obj;
- int error;
-
- if ((obj = git_oidmap_get(pb->walk_objects, id)) == NULL) {
- if ((error = lookup_walk_object(&obj, pb, id)) < 0)
- return error;
-
- if ((error = git_oidmap_set(pb->walk_objects, &obj->id, obj)) < 0)
- return error;
- }
-
- *out = obj;
- return 0;
-}
-
-static int mark_blob_uninteresting(git_packbuilder *pb, const git_oid *id)
-{
- int error;
- struct walk_object *obj;
-
- if ((error = retrieve_object(&obj, pb, id)) < 0)
- return error;
-
- obj->uninteresting = 1;
-
- return 0;
-}
-
-static int mark_tree_uninteresting(git_packbuilder *pb, const git_oid *id)
-{
- struct walk_object *obj;
- git_tree *tree;
- int error;
- size_t i;
-
- if ((error = retrieve_object(&obj, pb, id)) < 0)
- return error;
-
- if (obj->uninteresting)
- return 0;
-
- obj->uninteresting = 1;
-
- if ((error = git_tree_lookup(&tree, pb->repo, id)) < 0)
- return error;
-
- for (i = 0; i < git_tree_entrycount(tree); i++) {
- const git_tree_entry *entry = git_tree_entry_byindex(tree, i);
- const git_oid *entry_id = git_tree_entry_id(entry);
- switch (git_tree_entry_type(entry)) {
- case GIT_OBJECT_TREE:
- if ((error = mark_tree_uninteresting(pb, entry_id)) < 0)
- goto cleanup;
- break;
- case GIT_OBJECT_BLOB:
- if ((error = mark_blob_uninteresting(pb, entry_id)) < 0)
- goto cleanup;
- break;
- default:
- /* it's a submodule or something unknown, we don't want it */
- ;
- }
- }
-
-cleanup:
- git_tree_free(tree);
- return error;
-}
-
-/*
- * Mark the edges of the graph uninteresting. Since we start from a
- * git_revwalk, the commits are already uninteresting, but we need to
- * mark the trees and blobs.
- */
-static int mark_edges_uninteresting(git_packbuilder *pb, git_commit_list *commits)
-{
- int error;
- git_commit_list *list;
- git_commit *commit;
-
- for (list = commits; list; list = list->next) {
- if (!list->item->uninteresting)
- continue;
-
- if ((error = git_commit_lookup(&commit, pb->repo, &list->item->oid)) < 0)
- return error;
-
- error = mark_tree_uninteresting(pb, git_commit_tree_id(commit));
- git_commit_free(commit);
-
- if (error < 0)
- return error;
- }
-
- return 0;
-}
-
-static int pack_objects_insert_tree(git_packbuilder *pb, git_tree *tree)
-{
- size_t i;
- int error;
- git_tree *subtree;
- struct walk_object *obj;
- const char *name;
-
- if ((error = retrieve_object(&obj, pb, git_tree_id(tree))) < 0)
- return error;
-
- if (obj->seen || obj->uninteresting)
- return 0;
-
- obj->seen = 1;
-
- if ((error = git_packbuilder_insert(pb, &obj->id, NULL)))
- return error;
-
- for (i = 0; i < git_tree_entrycount(tree); i++) {
- const git_tree_entry *entry = git_tree_entry_byindex(tree, i);
- const git_oid *entry_id = git_tree_entry_id(entry);
- switch (git_tree_entry_type(entry)) {
- case GIT_OBJECT_TREE:
- if ((error = git_tree_lookup(&subtree, pb->repo, entry_id)) < 0)
- return error;
-
- error = pack_objects_insert_tree(pb, subtree);
- git_tree_free(subtree);
-
- if (error < 0)
- return error;
-
- break;
- case GIT_OBJECT_BLOB:
- if ((error = retrieve_object(&obj, pb, entry_id)) < 0)
- return error;
- if (obj->uninteresting)
- continue;
- name = git_tree_entry_name(entry);
- if ((error = git_packbuilder_insert(pb, entry_id, name)) < 0)
- return error;
- break;
- default:
- /* it's a submodule or something unknown, we don't want it */
- ;
- }
- }
-
-
- return error;
-}
-
-static int pack_objects_insert_commit(git_packbuilder *pb, struct walk_object *obj)
-{
- int error;
- git_commit *commit = NULL;
- git_tree *tree = NULL;
-
- obj->seen = 1;
-
- if ((error = git_packbuilder_insert(pb, &obj->id, NULL)) < 0)
- return error;
-
- if ((error = git_commit_lookup(&commit, pb->repo, &obj->id)) < 0)
- return error;
-
- if ((error = git_tree_lookup(&tree, pb->repo, git_commit_tree_id(commit))) < 0)
- goto cleanup;
-
- if ((error = pack_objects_insert_tree(pb, tree)) < 0)
- goto cleanup;
-
-cleanup:
- git_commit_free(commit);
- git_tree_free(tree);
- return error;
-}
-
-int git_packbuilder_insert_walk(git_packbuilder *pb, git_revwalk *walk)
-{
- int error;
- git_oid id;
- struct walk_object *obj;
-
- GIT_ASSERT_ARG(pb);
- GIT_ASSERT_ARG(walk);
-
- if ((error = mark_edges_uninteresting(pb, walk->user_input)) < 0)
- return error;
-
- /*
- * TODO: git marks the parents of the edges
- * uninteresting. This may provide a speed advantage, but does
- * seem to assume the remote does not have a single-commit
- * history on the other end.
- */
-
- /* walk down each tree up to the blobs and insert them, stopping when uninteresting */
- while ((error = git_revwalk_next(&id, walk)) == 0) {
- if ((error = retrieve_object(&obj, pb, &id)) < 0)
- return error;
-
- if (obj->seen || obj->uninteresting)
- continue;
-
- if ((error = pack_objects_insert_commit(pb, obj)) < 0)
- return error;
- }
-
- if (error == GIT_ITEROVER)
- error = 0;
-
- return error;
-}
-
-int git_packbuilder_set_callbacks(git_packbuilder *pb, git_packbuilder_progress progress_cb, void *progress_cb_payload)
-{
- if (!pb)
- return -1;
-
- pb->progress_cb = progress_cb;
- pb->progress_cb_payload = progress_cb_payload;
-
- return 0;
-}
-
-void git_packbuilder_free(git_packbuilder *pb)
-{
- if (pb == NULL)
- return;
-
-#ifdef GIT_THREADS
-
- git_mutex_free(&pb->cache_mutex);
- git_mutex_free(&pb->progress_mutex);
- git_cond_free(&pb->progress_cond);
-
-#endif
-
- if (pb->odb)
- git_odb_free(pb->odb);
-
- if (pb->object_ix)
- git_oidmap_free(pb->object_ix);
-
- if (pb->object_list)
- git__free(pb->object_list);
-
- git_oidmap_free(pb->walk_objects);
- git_pool_clear(&pb->object_pool);
-
- git_hash_ctx_cleanup(&pb->ctx);
- git_zstream_free(&pb->zstream);
-
- git__free(pb->pack_name);
-
- git__free(pb);
-}
projects / libgit2.git / blobdiff