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[78.148.43.8]) by smtp.gmail.com with ESMTPSA id 66sm15378656wrc.83.2019.08.08.04.29.21 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Thu, 08 Aug 2019 04:29:21 -0700 (PDT) Subject: Re: [GSoC][PATCHl 3/6] rebase -i: support --committer-date-is-author-date To: Rohit Ashiwal , Junio , GIT Mailing List Cc: Thomas , Elijah , Dscho , Martin References: <20190806173638.17510-1-rohit.ashiwal265@gmail.com> <20190806173638.17510-4-rohit.ashiwal265@gmail.com> From: Phillip Wood Message-ID: Date: Thu, 8 Aug 2019 12:29:20 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190806173638.17510-4-rohit.ashiwal265@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-HK Content-Transfer-Encoding: 7bit Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Hi Rohit On 06/08/2019 18:36, Rohit Ashiwal wrote: > rebase am already has this flag to "lie" about the committer date > by changing it to the author date. Let's add the same for > interactive machinery. > > Signed-off-by: Rohit Ashiwal > --- > Documentation/git-rebase.txt | 8 +++- > builtin/rebase.c | 20 +++++++--- > sequencer.c | 52 ++++++++++++++++++++++++- > sequencer.h | 1 + > t/t3422-rebase-incompatible-options.sh | 1 - > t/t3433-rebase-options-compatibility.sh | 19 +++++++++ > 6 files changed, 91 insertions(+), 10 deletions(-) > > diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt > index 85404fea52..83c5bbe06c 100644 > --- a/Documentation/git-rebase.txt > +++ b/Documentation/git-rebase.txt > @@ -383,8 +383,12 @@ default is `--no-fork-point`, otherwise the default is `--fork-point`. > See also INCOMPATIBLE OPTIONS below. > > --committer-date-is-author-date:: > + Instead of recording the time the rebased commits are > + created as the committer date, reuse the author date > + as the committer date. This implies --force-rebase. > + > --ignore-date:: > - These flags are passed to 'git am' to easily change the dates > + This flag is passed to 'git am' to change the author date > of the rebased commits (see linkgit:git-am[1]). > + > See also INCOMPATIBLE OPTIONS below. > @@ -522,7 +526,6 @@ INCOMPATIBLE OPTIONS > > The following options: > > - * --committer-date-is-author-date > * --ignore-date > * --whitespace > * -C > @@ -548,6 +551,7 @@ In addition, the following pairs of options are incompatible: > * --preserve-merges and --signoff > * --preserve-merges and --rebase-merges > * --preserve-merges and --ignore-whitespace > + * --preserve-merges and --committer-date-is-author-date > * --rebase-merges and --ignore-whitespace > * --rebase-merges and --strategy > * --rebase-merges and --strategy-option > diff --git a/builtin/rebase.c b/builtin/rebase.c > index 3c195ddc73..41fe9ebff8 100644 > --- a/builtin/rebase.c > +++ b/builtin/rebase.c > @@ -82,6 +82,7 @@ struct rebase_options { > int ignore_whitespace; > char *gpg_sign_opt; > int autostash; > + int committer_date_is_author_date; > char *cmd; > int allow_empty_message; > int rebase_merges, rebase_cousins; > @@ -113,6 +114,8 @@ static struct replay_opts get_replay_opts(struct rebase_options *opts) > replay.allow_empty_message = opts->allow_empty_message; > replay.verbose = opts->flags & REBASE_VERBOSE; > replay.reschedule_failed_exec = opts->reschedule_failed_exec; > + replay.committer_date_is_author_date = > + opts->committer_date_is_author_date; > replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt); > replay.strategy = opts->strategy; > > @@ -532,6 +535,9 @@ int cmd_rebase__interactive(int argc, const char **argv, const char *prefix) > warning(_("--[no-]rebase-cousins has no effect without " > "--rebase-merges")); > > + if (opts.committer_date_is_author_date) > + opts.flags |= REBASE_FORCE; > + > return !!run_rebase_interactive(&opts, command); > } > > @@ -970,6 +976,8 @@ static int run_am(struct rebase_options *opts) > > if (opts->ignore_whitespace) > argv_array_push(&am.args, "--ignore-whitespace"); > + if (opts->committer_date_is_author_date) > + argv_array_push(&opts->git_am_opts, "--committer-date-is-author-date"); > if (opts->action && !strcmp("continue", opts->action)) { > argv_array_push(&am.args, "--resolved"); > argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg); > @@ -1417,9 +1425,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) > PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT }, > OPT_BOOL(0, "signoff", &options.signoff, > N_("add a Signed-off-by: line to each commit")), > - OPT_PASSTHRU_ARGV(0, "committer-date-is-author-date", > - &options.git_am_opts, NULL, > - N_("passed to 'git am'"), PARSE_OPT_NOARG), > + OPT_BOOL(0, "committer-date-is-author-date", > + &options.committer_date_is_author_date, > + N_("make committer date match author date")), > OPT_PASSTHRU_ARGV(0, "ignore-date", &options.git_am_opts, NULL, > N_("passed to 'git am'"), PARSE_OPT_NOARG), > OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"), > @@ -1686,10 +1694,12 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) > state_dir_base, cmd_live_rebase, buf.buf); > } > > + if (options.committer_date_is_author_date) > + options.flags |= REBASE_FORCE; > + > for (i = 0; i < options.git_am_opts.argc; i++) { > const char *option = options.git_am_opts.argv[i], *p; > - if (!strcmp(option, "--committer-date-is-author-date") || > - !strcmp(option, "--ignore-date") || > + if (!strcmp(option, "--ignore-date") || > !strcmp(option, "--whitespace=fix") || > !strcmp(option, "--whitespace=strip")) > options.flags |= REBASE_FORCE; > diff --git a/sequencer.c b/sequencer.c > index a2d7b0925e..65adf79222 100644 > --- a/sequencer.c > +++ b/sequencer.c > @@ -147,6 +147,7 @@ static GIT_PATH_FUNC(rebase_path_refs_to_delete, "rebase-merge/refs-to-delete") > * command-line. > */ > static GIT_PATH_FUNC(rebase_path_gpg_sign_opt, "rebase-merge/gpg_sign_opt") > +static GIT_PATH_FUNC(rebase_path_cdate_is_adate, "rebase-merge/cdate_is_adate") > static GIT_PATH_FUNC(rebase_path_orig_head, "rebase-merge/orig-head") > static GIT_PATH_FUNC(rebase_path_verbose, "rebase-merge/verbose") > static GIT_PATH_FUNC(rebase_path_quiet, "rebase-merge/quiet") > @@ -876,6 +877,17 @@ static char *get_author(const char *message) > return NULL; > } > > +/* Returns a "date" string that needs to be free()'d by the caller */ > +static char *read_author_date_or_null(void) > +{ > + char *date; > + > + if (read_author_script(rebase_path_author_script(), > + NULL, NULL, &date, 0)) > + return NULL; > + return date; > +} > + > /* Read author-script and return an ident line (author timestamp) */ > static const char *read_author_ident(struct strbuf *buf) > { > @@ -904,6 +916,18 @@ static const char *read_author_ident(struct strbuf *buf) > return buf->buf; > } > > +static int setenv_committer_date_to_author_date(void) > +{ > + int res = 1; In the git codebase it is conventional to return -1 for an error > + char *date = read_author_date_or_null(); > + > + if (date) > + res = setenv("GIT_COMMITTER_DATE", date, 1); > + > + free(date); > + return res; > +} > + > static const char staged_changes_advice[] = > N_("you have staged changes in your working tree\n" > "If these changes are meant to be squashed into the previous commit, run:\n" > @@ -961,6 +985,9 @@ static int run_git_commit(struct repository *r, > { > struct child_process cmd = CHILD_PROCESS_INIT; > > + if (opts->committer_date_is_author_date && > + setenv_committer_date_to_author_date()) > + return 1; -1 for errors please, as seen in the surrounding code. > if ((flags & CREATE_ROOT_COMMIT) && !(flags & AMEND_MSG)) { > struct strbuf msg = STRBUF_INIT, script = STRBUF_INIT; > const char *author = NULL; > @@ -1397,7 +1424,9 @@ static int try_to_commit(struct repository *r, > > if (parse_head(r, ¤t_head)) > return -1; > - > + if (!(flags & AMEND_MSG) && opts->committer_date_is_author_date && > + setenv_committer_date_to_author_date()) > + return -1; I think it would be better to handle committer_date_is_author_date in a single place in this function, not have two implementations one of which is untested as shown in Stolee's latest test email. This function receives the author as a string so it should work with the author string once we have checked for amend. > if (flags & AMEND_MSG) { > const char *exclude_gpgsig[] = { "gpgsig", NULL }; > const char *out_enc = get_commit_output_encoding(); > @@ -1418,6 +1447,17 @@ static int try_to_commit(struct repository *r, > res = error(_("unable to parse commit author")); > goto out; > } > + if (opts->committer_date_is_author_date) { > + char *date; > + int len = strlen(author); > + char *idx = memchr(author, '>', len); what happens if there is a corrupted author without an email? - We end up with undefined behavior. > + > + ++idx; > + date = malloc(author + len - idx); > + memcpy(date, idx, author + len - idx); > + setenv("GIT_COMMITTER_DATE", date, 1); > + free(date); git has a high level api for manipulation author/committer information in ident.c, it would be best to use that. In any case code like this should be using strbuf's rather than malloc > + } > parents = copy_commit_list(current_head->parents); > extra = read_commit_extra_headers(current_head, exclude_gpgsig); > } else if (current_head) { Do the committer_date_is_author_date check after the end of this if. Best Wishes Phillip > @@ -2538,6 +2578,11 @@ static int read_populate_opts(struct replay_opts *opts) > opts->signoff = 1; > } > > + if (file_exists(rebase_path_cdate_is_adate())) { > + opts->allow_ff = 0; > + opts->committer_date_is_author_date = 1; > + } > + > if (file_exists(rebase_path_reschedule_failed_exec())) > opts->reschedule_failed_exec = 1; > > @@ -2620,6 +2665,8 @@ int write_basic_state(struct replay_opts *opts, const char *head_name, > write_file(rebase_path_gpg_sign_opt(), "-S%s\n", opts->gpg_sign); > if (opts->signoff) > write_file(rebase_path_signoff(), "--signoff\n"); > + if (opts->committer_date_is_author_date) > + write_file(rebase_path_cdate_is_adate(), "%s", ""); > if (opts->reschedule_failed_exec) > write_file(rebase_path_reschedule_failed_exec(), "%s", ""); > > @@ -3708,7 +3755,8 @@ static int pick_commits(struct repository *r, > setenv(GIT_REFLOG_ACTION, action_name(opts), 0); > if (opts->allow_ff) > assert(!(opts->signoff || opts->no_commit || > - opts->record_origin || opts->edit)); > + opts->record_origin || opts->edit || > + opts->committer_date_is_author_date)); > if (read_and_refresh_cache(r, opts)) > return -1; > > diff --git a/sequencer.h b/sequencer.h > index 0c494b83d4..e6cba468db 100644 > --- a/sequencer.h > +++ b/sequencer.h > @@ -43,6 +43,7 @@ struct replay_opts { > int verbose; > int quiet; > int reschedule_failed_exec; > + int committer_date_is_author_date; > > int mainline; > > diff --git a/t/t3422-rebase-incompatible-options.sh b/t/t3422-rebase-incompatible-options.sh > index 4342f79eea..7402f7e3da 100755 > --- a/t/t3422-rebase-incompatible-options.sh > +++ b/t/t3422-rebase-incompatible-options.sh > @@ -61,7 +61,6 @@ test_rebase_am_only () { > } > > test_rebase_am_only --whitespace=fix > -test_rebase_am_only --committer-date-is-author-date > test_rebase_am_only -C4 > > test_expect_success REBASE_P '--preserve-merges incompatible with --signoff' ' > diff --git a/t/t3433-rebase-options-compatibility.sh b/t/t3433-rebase-options-compatibility.sh > index e617d3150e..ceab48a831 100755 > --- a/t/t3433-rebase-options-compatibility.sh > +++ b/t/t3433-rebase-options-compatibility.sh > @@ -7,6 +7,9 @@ test_description='tests to ensure compatibility between am and interactive backe > > . ./test-lib.sh > > +GIT_AUTHOR_DATE="1999-04-02T08:03:20+05:30" > +export GIT_AUTHOR_DATE > + > # This is a special case in which both am and interactive backends > # provide the same output. It was done intentionally because > # both the backends fall short of optimal behaviour. > @@ -62,4 +65,20 @@ test_expect_success '--ignore-whitespace works with interactive backend' ' > test_cmp expect file > ' > > +test_expect_success '--committer-date-is-author-date works with am backend' ' > + git rebase -f HEAD^ && > + git rebase --committer-date-is-author-date HEAD^ && > + git show HEAD --pretty="format:%at" >authortime && > + git show HEAD --pretty="format:%ct" >committertime && > + test_cmp authortime committertime > +' > + > +test_expect_success '--committer-date-is-author-date works with interactive backend' ' > + git rebase -f HEAD^ && > + git rebase -i --committer-date-is-author-date HEAD^ && > + git show HEAD --pretty="format:%at" >authortime && > + git show HEAD --pretty="format:%ct" >committertime && > + test_cmp authortime committertime > +' > + > test_done >