From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.0 required=3.0 tests=AWL,BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id A168C207E4 for ; Fri, 28 Apr 2017 21:33:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992748AbdD1VdD (ORCPT ); Fri, 28 Apr 2017 17:33:03 -0400 Received: from mout.gmx.net ([212.227.15.19]:64786 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992569AbdD1VdB (ORCPT ); Fri, 28 Apr 2017 17:33:01 -0400 Received: from virtualbox ([37.201.193.73]) by mail.gmx.com (mrgmx003 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MEFlg-1dJZb11kts-00FPf3; Fri, 28 Apr 2017 23:32:51 +0200 Date: Fri, 28 Apr 2017 23:32:49 +0200 (CEST) From: Johannes Schindelin X-X-Sender: virtualbox@virtualbox To: git@vger.kernel.org cc: Junio C Hamano , Philip Oakley , Jeff King , Phillip Wood Subject: [PATCH v4 08/10] rebase -i: skip unnecessary picks using the rebase--helper In-Reply-To: Message-ID: <3da0bb88f6a4c34d36d457d4118082f7ac6cfbc6.1493414945.git.johannes.schindelin@gmx.de> References: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Provags-ID: V03:K0:cwRVqb4fPCKGYm2OgEkRcsfFsxhyz8EgPtMSMBMHwq7Gsh6xTpM Lw0RdHa70mzaWKJ38llwabp+UHHdotoBJ0y4gQCxWOd+/IJUUu/oXC/2GU8YK1tfUn6uFSZ wlhDaA1Iwz2D9gD2/1kqMi5swMSHb/tJgWABuGtqvO+zVCbFDjsxG7Ya5/Xg5eac516Psxl niJN3knL4k3joixaFMoRg== X-UI-Out-Filterresults: notjunk:1;V01:K0:QdpuQ4JTxFE=:EiRSJdk/CaMxkg+AXYNJtf IsmfoDirK94u9CpWE2fZF86/ej1INLEp/snAq8AHCQXa6e4Tw01zfYHRi2a4pyAuBiUprHg8X BYcIO9JrqkrLDrs6tdj4dYLaDH7xUhTqlP1BGaLEhLMXCLMqEsf2glYc/y5OcNNY2iRfTlxV0 kVOUBo9mbc/yhTnk/MnYB43bNytkVBRIysL4oi89Nedu6bXT9KkqAdHwFlLFGaCEU12Xa76Lh fWPsEA3vQQchKXt37o+5BPa72lfZvBW9Ur0bt8sEQRbPMYzMwmVk+vm37yvAZr9B8Jn4R62Va E42b3ZS1UHtz38BLXZCujBwqcu5olKQF4D6bp/HwIyP+71j+RY5ossdOu9yjF4gtaFoqPG8Fx 9eOB1YZOZqJ33vmlmG5o3BcNiFwQIF5q4lTR0niQFolLWgyGsGV86ZZO4+DBshZ9/GnST9Riz GILOHj3P+z4XS/3zfJuugXQUkJ/LxB6C3d+0OcF9C5OaHJsl3A1LDMzJADkPxvzYLerXjQPsk jf9Z+qdJNv7ynLQUCpJasYeEJQ872rOzmEUsavm9AYeGc6DTea1tFAV8FtIyZp/YsVKIcSxQm AQZ8NwyUq3F522CI1LEd9qfQAH6d2rQRFnXswAgTbyYkOadEJqO7CD2EVXxKcey7mUMXFdXlz PlwOZfwy9ggGCdRsNltoXcQ/K/ttbFI9CWAWdi5Bhy2pyDKg2VAoJ/A/vGMhyJ2L7ObJv+AxA A8pVUuwcMicSQ761mneWgoq7NrmMiYBldZKJ5SB3h1yGrr1Sm7hywgxgxTaMPhd6oMdMBslyp WX1KloJ Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org In particular on Windows, where shell scripts are even more expensive than on MacOSX or Linux, it makes sense to move a loop that forks Git at least once for every line in the todo list into a builtin. Note: The original code did not try to skip unnecessary picks of root commits but punts instead (probably --root was not considered common enough of a use case to bother optimizing). We do the same, for now. Signed-off-by: Johannes Schindelin --- builtin/rebase--helper.c | 6 ++- git-rebase--interactive.sh | 41 ++--------------- sequencer.c | 107 +++++++++++++++++++++++++++++++++++++++++++++ sequencer.h | 1 + 4 files changed, 116 insertions(+), 39 deletions(-) diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c index e706eac710d..de3ccd9bfbc 100644 --- a/builtin/rebase--helper.c +++ b/builtin/rebase--helper.c @@ -14,7 +14,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) int keep_empty = 0; enum { CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_SHA1S, EXPAND_SHA1S, - CHECK_TODO_LIST + CHECK_TODO_LIST, SKIP_UNNECESSARY_PICKS } command = 0; struct option options[] = { OPT_BOOL(0, "ff", &opts.allow_ff, N_("allow fast-forward")), @@ -31,6 +31,8 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) N_("expand SHA-1s in the todo list"), EXPAND_SHA1S), OPT_CMDMODE(0, "check-todo-list", &command, N_("check the todo list"), CHECK_TODO_LIST), + OPT_CMDMODE(0, "skip-unnecessary-picks", &command, + N_("skip unnecessary picks"), SKIP_UNNECESSARY_PICKS), OPT_END() }; @@ -55,5 +57,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) return !!transform_todo_ids(0); if (command == CHECK_TODO_LIST && argc == 1) return !!check_todo_list(); + if (command == SKIP_UNNECESSARY_PICKS && argc == 1) + return !!skip_unnecessary_picks(); usage_with_options(builtin_rebase_helper_usage, options); } diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh index 08168a0d46b..92e3ca1de3b 100644 --- a/git-rebase--interactive.sh +++ b/git-rebase--interactive.sh @@ -713,43 +713,6 @@ do_rest () { done } -# skip picking commits whose parents are unchanged -skip_unnecessary_picks () { - fd=3 - while read -r command rest - do - # fd=3 means we skip the command - case "$fd,$command" in - 3,pick|3,p) - # pick a commit whose parent is current $onto -> skip - sha1=${rest%% *} - case "$(git rev-parse --verify --quiet "$sha1"^)" in - "$onto"*) - onto=$sha1 - ;; - *) - fd=1 - ;; - esac - ;; - 3,"$comment_char"*|3,) - # copy comments - ;; - *) - fd=1 - ;; - esac - printf '%s\n' "$command${rest:+ }$rest" >&$fd - done <"$todo" >"$todo.new" 3>>"$done" && - mv -f "$todo".new "$todo" && - case "$(peek_next_command)" in - squash|s|fixup|f) - record_in_rewritten "$onto" - ;; - esac || - die "$(gettext "Could not skip unnecessary pick commands")" -} - expand_todo_ids() { git rebase--helper --expand-sha1s } @@ -1149,7 +1112,9 @@ git rebase--helper --check-todo-list || { expand_todo_ids -test -d "$rewritten" || test -n "$force_rebase" || skip_unnecessary_picks +test -d "$rewritten" || test -n "$force_rebase" || +onto="$(git rebase--helper --skip-unnecessary-picks)" || +die "Could not skip unnecessary pick commands" checkout_onto if test -z "$rebase_root" && test ! -d "$rewritten" diff --git a/sequencer.c b/sequencer.c index 4535ba9d12f..72e3ad8d145 100644 --- a/sequencer.c +++ b/sequencer.c @@ -2616,3 +2616,110 @@ int check_todo_list(void) return res; } + +/* skip picking commits whose parents are unchanged */ +int skip_unnecessary_picks(void) +{ + const char *todo_file = rebase_path_todo(); + struct strbuf buf = STRBUF_INIT; + struct todo_list todo_list = TODO_LIST_INIT; + struct object_id onto_oid, *oid = &onto_oid, *parent_oid; + int fd, i; + + if (!read_oneliner(&buf, rebase_path_onto(), 0)) + return error(_("could not read 'onto'")); + if (get_sha1(buf.buf, onto_oid.hash)) { + strbuf_release(&buf); + return error(_("need a HEAD to fixup")); + } + strbuf_release(&buf); + + fd = open(todo_file, O_RDONLY); + if (fd < 0) { + return error_errno(_("could not open '%s'"), todo_file); + } + if (strbuf_read(&todo_list.buf, fd, 0) < 0) { + close(fd); + return error(_("could not read '%s'."), todo_file); + } + close(fd); + if (parse_insn_buffer(todo_list.buf.buf, &todo_list) < 0) { + todo_list_release(&todo_list); + return -1; + } + + for (i = 0; i < todo_list.nr; i++) { + struct todo_item *item = todo_list.items + i; + + if (item->command >= TODO_NOOP) + continue; + if (item->command != TODO_PICK) + break; + if (parse_commit(item->commit)) { + todo_list_release(&todo_list); + return error(_("could not parse commit '%s'"), + oid_to_hex(&item->commit->object.oid)); + } + if (!item->commit->parents) + break; /* root commit */ + if (item->commit->parents->next) + break; /* merge commit */ + parent_oid = &item->commit->parents->item->object.oid; + if (hashcmp(parent_oid->hash, oid->hash)) + break; + oid = &item->commit->object.oid; + } + if (i > 0) { + int offset = i < todo_list.nr ? + todo_list.items[i].offset_in_buf : todo_list.buf.len; + const char *done_path = rebase_path_done(); + + fd = open(done_path, O_CREAT | O_WRONLY | O_APPEND, 0666); + if (fd < 0) { + error_errno(_("could not open '%s' for writing"), + done_path); + todo_list_release(&todo_list); + return -1; + } + if (write_in_full(fd, todo_list.buf.buf, offset) < 0) { + error_errno(_("could not write to '%s'"), done_path); + todo_list_release(&todo_list); + close(fd); + return -1; + } + close(fd); + + fd = open(rebase_path_todo(), O_WRONLY, 0666); + if (fd < 0) { + error_errno(_("could not open '%s' for writing"), + rebase_path_todo()); + todo_list_release(&todo_list); + return -1; + } + if (write_in_full(fd, todo_list.buf.buf + offset, + todo_list.buf.len - offset) < 0) { + error_errno(_("could not write to '%s'"), + rebase_path_todo()); + close(fd); + todo_list_release(&todo_list); + return -1; + } + if (ftruncate(fd, todo_list.buf.len - offset) < 0) { + error_errno(_("could not truncate '%s'"), + rebase_path_todo()); + todo_list_release(&todo_list); + close(fd); + return -1; + } + close(fd); + + todo_list.current = i; + if (is_fixup(peek_command(&todo_list, 0))) + record_in_rewritten(oid, peek_command(&todo_list, 0)); + } + + todo_list_release(&todo_list); + printf("%s\n", oid_to_hex(oid)); + + return 0; +} diff --git a/sequencer.h b/sequencer.h index 4978a61b83b..28e1fc1e9bb 100644 --- a/sequencer.h +++ b/sequencer.h @@ -50,6 +50,7 @@ int sequencer_make_script(int keep_empty, FILE *out, int transform_todo_ids(int shorten_sha1s); int check_todo_list(void); +int skip_unnecessary_picks(void); extern const char sign_off_header[]; -- 2.12.2.windows.2.800.gede8f145e06