[RFC PATCH v3 03/17] fetch-pack: Use a strbuf to compose the want list
- From
Shawn O. Pearce <spearce@spearce.org>
- Date
- Oct 15, 2009, 03:36 UTC
- Message-ID
- <1255577814-14745-4-git-send-email-spearce@spearce.org>
- In-Reply-To
- <1255577814-14745-1-git-send-email-spearce@spearce.org>
This change is being offered as a refactoring to make later commits in the smart HTTP series easier.
By changing the enabled capabilities to be formatted in a strbuf it is easier to add a new capability to the set of supported capabilities.
By formatting the want portion of the request into a strbuf and writing it as a whole block we can later decide to hold onto the req_buf (instead of releasing it) to recycle in stateless communications.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> --- builtin-fetch-pack.c | 52 ++++++++++++++++++++++++++++++++----------------- commit.c | 10 +++----- commit.h | 2 +- 3 files changed, 39 insertions(+), 25 deletions(-)
diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c index 629735f..783c2b0 100644 --- a/builtin-fetch-pack.c +++ b/builtin-fetch-pack.c @@ -165,6 +165,7 @@ static int find_common(int fd[2], unsigned char *result_sha1, const unsigned char *sha1; unsigned in_vain = 0; int got_continue = 0; + struct strbuf req_buf = STRBUF_INIT; if (marked) for_each_ref(clear_marks, NULL); @@ -175,6 +176,7 @@ static int find_common(int fd[2], unsigned char *result_sha1, fetching = 0; for ( ; refs ; refs = refs->next) { unsigned char *remote = refs->old_sha1; + const char *remote_hex; struct object *o; /* @@ -192,27 +194,36 @@ static int find_common(int fd[2], unsigned char *result_sha1, continue; } - if (!fetching) - packet_write(fd[1], "want %s%s%s%s%s%s%s%s\n", - sha1_to_hex(remote), - (multi_ack ? " multi_ack" : ""), - (use_sideband == 2 ? " side-band-64k" : ""), - (use_sideband == 1 ? " side-band" : ""), - (args.use_thin_pack ? " thin-pack" : ""), - (args.no_progress ? " no-progress" : ""), - (args.include_tag ? " include-tag" : ""), - (prefer_ofs_delta ? " ofs-delta" : "")); - else - packet_write(fd[1], "want %s\n", sha1_to_hex(remote)); + remote_hex = sha1_to_hex(remote); + if (!fetching) { + struct strbuf c = STRBUF_INIT; + if (multi_ack) strbuf_addstr(&c, " multi_ack"); + if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); + if (use_sideband == 1) strbuf_addstr(&c, " side-band"); + if (args.use_thin_pack) strbuf_addstr(&c, " thin-pack"); + if (args.no_progress) strbuf_addstr(&c, " no-progress"); + if (args.include_tag) strbuf_addstr(&c, " include-tag"); + if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); + packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); + strbuf_release(&c); + } else + packet_buf_write(&req_buf, "want %s\n", remote_hex); fetching++; } + + if (!fetching) { + strbuf_release(&req_buf); + packet_flush(fd[1]); + return 1; + } + if (is_repository_shallow()) - write_shallow_commits(fd[1], 1); + write_shallow_commits(&req_buf, 1); if (args.depth > 0) - packet_write(fd[1], "deepen %d", args.depth); - packet_flush(fd[1]); - if (!fetching) - return 1; + packet_buf_write(&req_buf, "deepen %d", args.depth); + packet_buf_flush(&req_buf); + + safe_write(fd[1], req_buf.buf, req_buf.len); if (args.depth > 0) { char line[1024]; @@ -296,6 +307,8 @@ done: multi_ack = 0; flushes++; } + strbuf_release(&req_buf); + while (flushes || multi_ack) { int ack = get_ack(fd[0], result_sha1); if (ack) { @@ -809,6 +822,7 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args, if (args.depth > 0) { struct cache_time mtime; + struct strbuf sb = STRBUF_INIT; char *shallow = git_path("shallow"); int fd; @@ -826,12 +840,14 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args, fd = hold_lock_file_for_update(&lock, shallow, LOCK_DIE_ON_ERROR); - if (!write_shallow_commits(fd, 0)) { + if (!write_shallow_commits(&sb, 0) + || write_in_full(fd, sb.buf, sb.len) != sb.len) { unlink_or_warn(shallow); rollback_lock_file(&lock); } else { commit_lock_file(&lock); } + strbuf_release(&sb); } reprepare_packed_git(); diff --git a/commit.c b/commit.c index fedbd5e..471efb0 100644 --- a/commit.c +++ b/commit.c @@ -199,7 +199,7 @@ struct commit_graft *lookup_commit_graft(const unsigned char *sha1) return commit_graft[pos]; } -int write_shallow_commits(int fd, int use_pack_protocol) +int write_shallow_commits(struct strbuf *out, int use_pack_protocol) { int i, count = 0; for (i = 0; i < commit_graft_nr; i++) @@ -208,12 +208,10 @@ int write_shallow_commits(int fd, int use_pack_protocol) sha1_to_hex(commit_graft[i]->sha1); count++; if (use_pack_protocol) - packet_write(fd, "shallow %s", hex); + packet_buf_write(out, "shallow %s", hex); else { - if (write_in_full(fd, hex, 40) != 40) - break; - if (write_str_in_full(fd, "\n") != 1) - break; + strbuf_addstr(out, hex); + strbuf_addch(out, '\n'); } } return count; diff --git a/commit.h b/commit.h index f4fc5c5..817c75c 100644 --- a/commit.h +++ b/commit.h @@ -131,7 +131,7 @@ extern struct commit_list *get_octopus_merge_bases(struct commit_list *in); extern int register_shallow(const unsigned char *sha1); extern int unregister_shallow(const unsigned char *sha1); -extern int write_shallow_commits(int fd, int use_pack_protocol); +extern int write_shallow_commits(struct strbuf *out, int use_pack_protocol); extern int is_repository_shallow(void); extern struct commit_list *get_shallow_commits(struct object_array *heads, int depth, int shallow_flag, int not_shallow_flag);
-- 1.6.5.52.g0ff2e