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=-3.7 required=3.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,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 3127E1F4F8 for ; Fri, 14 Oct 2016 14:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757405AbcJNOOx (ORCPT ); Fri, 14 Oct 2016 10:14:53 -0400 Received: from a7-17.smtp-out.eu-west-1.amazonses.com ([54.240.7.17]:52102 "EHLO a7-17.smtp-out.eu-west-1.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757305AbcJNOOT (ORCPT ); Fri, 14 Oct 2016 10:14:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=ihchhvubuqgjsxyuhssfvqohv7z3u4hn; d=amazonses.com; t=1476454456; h=From:To:Message-ID:In-Reply-To:References:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Date:Feedback-ID; bh=wiGLWpmaoIOYPhvew05MgKhSQ1XGVz1Y8t1R52HqThk=; b=JFbKNUHx5IWWSIpx0GIBQ3L4mmbl88xaEYUuuWxhA8SJm1p0ZN04zqi9hB4pqJ5W NEMfGj6DdQHymmuWXgoLuJDgEa6yGA/1FkkWzGWcxWui6Nj4qUzkFcFYjXIub8a8huk c/o2Nc+0+0aeGYyWS20OvkcNgv1JATd/uDbsd9rU= From: Pranit Bauva To: git@vger.kernel.org Message-ID: <01020157c38b1ad3-ea75ed97-2514-427e-8e57-9f10efd4e6e9-000000@eu-west-1.amazonses.com> In-Reply-To: <01020157c38b19e0-81123fa5-5d9d-4f64-8f1b-ff336e83ebe4-000000@eu-west-1.amazonses.com> References: <01020157c38b19e0-81123fa5-5d9d-4f64-8f1b-ff336e83ebe4-000000@eu-west-1.amazonses.com> Subject: [PATCH v15 13/27] bisect--helper: `bisect_start` shell function partially in C MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Fri, 14 Oct 2016 14:14:16 +0000 X-SES-Outgoing: 2016.10.14-54.240.7.17 Feedback-ID: 1.eu-west-1.YYPRFFOog89kHDDPKvTu4MK67j4wW0z7cAgZtFqQH58=:AmazonSES Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Reimplement the `bisect_start` shell function partially in C and add `bisect-start` subcommand to `git bisect--helper` to call it from git-bisect.sh . The last part is not converted because it calls another shell function `bisect_start` shell function will be completed after the `bisect_next` shell function is ported in C. Using `--bisect-start` subcommand is a temporary measure to port shell function in C so as to use the existing test suite. As more functions are ported, this subcommand will be retired and will be called by some other methods. Mentored-by: Lars Schneider Mentored-by: Christian Couder Signed-off-by: Pranit Bauva --- builtin/bisect--helper.c | 217 ++++++++++++++++++++++++++++++++++++++++++++++- git-bisect.sh | 133 +---------------------------- 2 files changed, 217 insertions(+), 133 deletions(-) diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c index 6a5878c..1d3e17f 100644 --- a/builtin/bisect--helper.c +++ b/builtin/bisect--helper.c @@ -7,6 +7,7 @@ #include "argv-array.h" #include "run-command.h" #include "prompt.h" +#include "quote.h" static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS") static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV") @@ -14,6 +15,8 @@ static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK") static GIT_PATH_FUNC(git_path_bisect_log, "BISECT_LOG") static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START") static GIT_PATH_FUNC(git_path_bisect_head, "BISECT_HEAD") +static GIT_PATH_FUNC(git_path_head_name, "head-name") +static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES") static const char * const git_bisect_helper_usage[] = { N_("git bisect--helper --next-all [--no-checkout]"), @@ -24,6 +27,8 @@ static const char * const git_bisect_helper_usage[] = { N_("git bisect--helper --bisect-check-and-set-terms "), N_("git bisect--helper --bisect-next-check [] --term-{new,bad}=]" + "[--no-checkout] [ [...]] [--] [...]"), NULL }; @@ -403,6 +408,205 @@ static int bisect_terms(struct bisect_terms *terms, const char **argv, int argc) return 0; } +static int bisect_start(struct bisect_terms *terms, int no_checkout, + const char **argv, int argc) +{ + int i, has_double_dash = 0, must_write_terms = 0, bad_seen = 0; + int flags, pathspec_pos, retval = 0; + struct string_list revs = STRING_LIST_INIT_DUP; + struct string_list states = STRING_LIST_INIT_DUP; + struct strbuf start_head = STRBUF_INIT; + struct strbuf bisect_names = STRBUF_INIT; + struct strbuf orig_args = STRBUF_INIT; + const char *head; + unsigned char sha1[20]; + FILE *fp = NULL; + struct object_id oid; + + if (is_bare_repository()) + no_checkout = 1; + + for (i = 0; i < argc; i++) { + if (!strcmp(argv[i], "--")) { + has_double_dash = 1; + break; + } + } + + for (i = 0; i < argc; i++) { + const char *commit_id = xstrfmt("%s^{commit}", argv[i]); + const char *arg = argv[i]; + if (!strcmp(argv[i], "--")) { + has_double_dash = 1; + break; + } else if (!strcmp(arg, "--no-checkout")) { + no_checkout = 1; + } else if (!strcmp(arg, "--term-good") || + !strcmp(arg, "--term-old")) { + must_write_terms = 1; + terms->term_good = xstrdup(argv[++i]); + } else if (skip_prefix(arg, "--term-good=", &arg)) { + must_write_terms = 1; + terms->term_good = xstrdup(arg); + } else if (skip_prefix(arg, "--term-old=", &arg)) { + must_write_terms = 1; + terms->term_good = xstrdup(arg); + } else if (!strcmp(arg, "--term-bad") || + !strcmp(arg, "--term-new")) { + must_write_terms = 1; + terms->term_bad = xstrdup(argv[++i]); + } else if (skip_prefix(arg, "--term-bad=", &arg)) { + must_write_terms = 1; + terms->term_bad = xstrdup(arg); + } else if (skip_prefix(arg, "--term-new=", &arg)) { + must_write_terms = 1; + terms->term_good = xstrdup(arg); + } else if (starts_with(arg, "--") && + !one_of(arg, "--term-good", "--term-bad", NULL)) { + die(_("unrecognised option: '%s'"), arg); + } else if (get_oid(commit_id, &oid) && has_double_dash) { + die(_("'%s' does not appear to be a valid revision"), argv[i]); + } else { + string_list_append(&revs, oid_to_hex(&oid)); + } + } + pathspec_pos = i; + + /* + * The user ran "git bisect start ", hence did not + * explicitly specify the terms, but we are already starting to + * set references named with the default terms, and won't be able + * to change afterwards. + */ + must_write_terms |= !!revs.nr; + for (i = 0; i < revs.nr; i++) { + if (bad_seen) { + string_list_append(&states, terms->term_good); + } else { + bad_seen = 1; + string_list_append(&states, terms->term_bad); + } + } + + /* + * Verify HEAD + */ + head = resolve_ref_unsafe("HEAD", 0, sha1, &flags); + if (!head) + if (get_sha1("HEAD", sha1)) + die(_("Bad HEAD - I need a HEAD")); + + if (!is_empty_or_missing_file(git_path_bisect_start())) { + /* Reset to the rev from where we started */ + strbuf_read_file(&start_head, git_path_bisect_start(), 0); + strbuf_trim(&start_head); + if (!no_checkout) { + struct argv_array argv = ARGV_ARRAY_INIT; + argv_array_pushl(&argv, "checkout", start_head.buf, + "--", NULL); + if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) { + error(_("checking out '%s' failed. Try 'git " + "bisect start '."), + start_head.buf); + retval = -1; + goto finish; + } + } + } else { + if (!get_sha1(head, sha1) && + !starts_with(head, "refs/heads/")) { + strbuf_reset(&start_head); + strbuf_addstr(&start_head, sha1_to_hex(sha1)); + } else if (!get_sha1(head, sha1) && + skip_prefix(head, "refs/heads/", &head)) { + /* + * This error message should only be triggered by + * cogito usage, and cogito users should understand + * it relates to cg-seek. + */ + if (!is_empty_or_missing_file(git_path_head_name())) + die(_("won't bisect on cg-seek'ed tree")); + strbuf_addstr(&start_head, head); + } else { + die(_("Bad HEAD - strange symbolic ref")); + } + } + + /* + * Get rid of any old bisect state. + */ + if (bisect_clean_state()) { + return -1; + } + /* + * In case of mistaken revs or checkout error, or signals received, + * "bisect_auto_next" below may exit or misbehave. + * We have to trap this to be able to clean up using + * "bisect_clean_state". + */ + + /* + * Write new start state + */ + write_file(git_path_bisect_start(), "%s\n", start_head.buf); + + if (no_checkout) { + get_oid(start_head.buf, &oid); + if (update_ref(NULL, "BISECT_HEAD", oid.hash, NULL, 0, + UPDATE_REFS_MSG_ON_ERR)) { + retval = -1; + goto finish; + } + } + + if (pathspec_pos < argc - 1) + sq_quote_argv(&bisect_names, argv + pathspec_pos, 0); + write_file(git_path_bisect_names(), "%s\n", bisect_names.buf); + + for (i = 0; i < states.nr; i++) { + if (bisect_write(states.items[i].string, + revs.items[i].string, terms, 1)) { + retval = -1; + goto finish; + } + } + + if (must_write_terms) + if (write_terms(terms->term_bad, terms->term_good)) { + retval = -1; + goto finish; + } + + fp = fopen(git_path_bisect_log(), "a"); + if (!fp) + return -1; + + if (fprintf(fp, "git bisect start") < 1) { + retval = -1; + goto finish; + } + + sq_quote_argv(&orig_args, argv, 0); + if (fprintf(fp, "%s", orig_args.buf) < 0) { + retval = -1; + goto finish; + } + if (fprintf(fp, "\n") < 1) { + retval = -1; + goto finish; + } + goto finish; +finish: + if (fp) + fclose(fp); + string_list_clear(&revs, 0); + string_list_clear(&states, 0); + strbuf_release(&start_head); + strbuf_release(&bisect_names); + strbuf_release(&orig_args); + return retval; +} + int cmd_bisect__helper(int argc, const char **argv, const char *prefix) { enum { @@ -414,7 +618,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix) BISECT_WRITE, CHECK_AND_SET_TERMS, BISECT_NEXT_CHECK, - BISECT_TERMS + BISECT_TERMS, + BISECT_START } cmdmode = 0; int no_checkout = 0, res = 0; struct option options[] = { @@ -436,6 +641,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix) N_("check whether bad or good terms exist"), BISECT_NEXT_CHECK), OPT_CMDMODE(0, "bisect-terms", &cmdmode, N_("print out the bisect terms"), BISECT_TERMS), + OPT_CMDMODE(0, "bisect-start", &cmdmode, + N_("start the bisect session"), BISECT_START), OPT_BOOL(0, "no-checkout", &no_checkout, N_("update BISECT_HEAD instead of checking out the current commit")), OPT_END() @@ -443,7 +650,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix) struct bisect_terms terms; argc = parse_options(argc, argv, prefix, options, - git_bisect_helper_usage, PARSE_OPT_KEEP_UNKNOWN); + git_bisect_helper_usage, + PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_UNKNOWN); if (!cmdmode) usage_with_options(git_bisect_helper_usage, options); @@ -497,6 +705,11 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix) die(_("--bisect-terms requires 0 or 1 argument")); res = bisect_terms(&terms, argv, argc); break; + case BISECT_START: + terms.term_good = "good"; + terms.term_bad = "bad"; + res = bisect_start(&terms, no_checkout, argv, argc); + break; default: die("BUG: unknown subcommand '%d'", cmdmode); } diff --git a/git-bisect.sh b/git-bisect.sh index d6c8b5a..f0896b3 100755 --- a/git-bisect.sh +++ b/git-bisect.sh @@ -71,122 +71,7 @@ bisect_autostart() { } bisect_start() { - # - # Check for one bad and then some good revisions. - # - has_double_dash=0 - for arg; do - case "$arg" in --) has_double_dash=1; break ;; esac - done - orig_args=$(git rev-parse --sq-quote "$@") - bad_seen=0 - eval='' - must_write_terms=0 - revs='' - if test "z$(git rev-parse --is-bare-repository)" != zfalse - then - mode=--no-checkout - else - mode='' - fi - while [ $# -gt 0 ]; do - arg="$1" - case "$arg" in - --) - shift - break - ;; - --no-checkout) - mode=--no-checkout - shift ;; - --term-good|--term-old) - shift - must_write_terms=1 - TERM_GOOD=$1 - shift ;; - --term-good=*|--term-old=*) - must_write_terms=1 - TERM_GOOD=${1#*=} - shift ;; - --term-bad|--term-new) - shift - must_write_terms=1 - TERM_BAD=$1 - shift ;; - --term-bad=*|--term-new=*) - must_write_terms=1 - TERM_BAD=${1#*=} - shift ;; - --*) - die "$(eval_gettext "unrecognised option: '\$arg'")" ;; - *) - rev=$(git rev-parse -q --verify "$arg^{commit}") || { - test $has_double_dash -eq 1 && - die "$(eval_gettext "'\$arg' does not appear to be a valid revision")" - break - } - revs="$revs $rev" - shift - ;; - esac - done - - for rev in $revs - do - # The user ran "git bisect start - # ", hence did not explicitly specify - # the terms, but we are already starting to - # set references named with the default terms, - # and won't be able to change afterwards. - must_write_terms=1 - - case $bad_seen in - 0) state=$TERM_BAD ; bad_seen=1 ;; - *) state=$TERM_GOOD ;; - esac - eval="$eval git bisect--helper --bisect-write '$state' '$rev' '$TERM_GOOD' '$TERM_BAD' 'nolog' &&" - done - # - # Verify HEAD. - # - head=$(GIT_DIR="$GIT_DIR" git symbolic-ref -q HEAD) || - head=$(GIT_DIR="$GIT_DIR" git rev-parse --verify HEAD) || - die "$(gettext "Bad HEAD - I need a HEAD")" - - # - # Check if we are bisecting. - # - start_head='' - if test -s "$GIT_DIR/BISECT_START" - then - # Reset to the rev from where we started. - start_head=$(cat "$GIT_DIR/BISECT_START") - if test "z$mode" != "z--no-checkout" - then - git checkout "$start_head" -- || - die "$(eval_gettext "Checking out '\$start_head' failed. Try 'git bisect reset '.")" - fi - else - # Get rev from where we start. - case "$head" in - refs/heads/*|$_x40) - # This error message should only be triggered by - # cogito usage, and cogito users should understand - # it relates to cg-seek. - [ -s "$GIT_DIR/head-name" ] && - die "$(gettext "won't bisect on cg-seek'ed tree")" - start_head="${head#refs/heads/}" - ;; - *) - die "$(gettext "Bad HEAD - strange symbolic ref")" - ;; - esac - fi - - # - # Get rid of any old bisect state. - # - git bisect--helper --bisect-clean-state || exit + git bisect--helper --bisect-start $@ || exit # # Change state. @@ -197,24 +82,10 @@ bisect_start() { # trap 'git bisect--helper --bisect-clean-state' 0 trap 'exit 255' 1 2 3 15 - - # - # Write new start state. - # - echo "$start_head" >"$GIT_DIR/BISECT_START" && { - test "z$mode" != "z--no-checkout" || - git update-ref --no-deref BISECT_HEAD "$start_head" - } && - git rev-parse --sq-quote "$@" >"$GIT_DIR/BISECT_NAMES" && - eval "$eval true" && - if test $must_write_terms -eq 1 - then - git bisect--helper --write-terms "$TERM_BAD" "$TERM_GOOD" - fi && - echo "git bisect start$orig_args" >>"$GIT_DIR/BISECT_LOG" || exit # # Check if we can proceed to the next bisect state. # + get_terms bisect_auto_next trap '-' 0 -- https://github.com/git/git/pull/287