From: Phillip Wood <phillip.wood123@gmail.com>
Date: Tue, 07 Apr 2020 18:01:21 GMT
Subject: Re: [PATCH 1/6] Revert "Revert "Merge branch 'ra/rebase-i-more-options'""
Message-ID: <35d165ec-1e19-1000-c8ec-7273ed6c98ce@gmail.com>
In-Reply-To: <CABPp-BEnmpET=6rEdDXJWnPjzV33a2x6rKB6FQ-o8y+8ssK4jw@mail.gmail.com>

Hi Elijah

On 07/04/2020 16:16, Elijah Newren wrote:
> On Tue, Apr 7, 2020 at 7:11 AM Phillip Wood <phillip.wood123@gmail.com> wrote:
>>
>> From: Phillip Wood <phillip.wood@dunelm.org.uk>
>>
>> This reverts commit 4d924528d8bfe947abfc54ee9bd3892ab509c8cd.
>>
>> This is being reverted to enable some fixups for
>> ra/rebase-i-more-options to be built on this commit.
> 
> This makes sense to me, but it will be only the second 'Revert
> "Revert..."' commit in all of git.git and I'm curious if Junio will be
> unhappy with it.

I wasn't sure what to do for the best, this seemed to be reasonable
(originally I just based the patches on top of ra/rebase-i-more-options
but then they would be a pain to merge into pu because of the revert)
but if Junio has other ideas I'm happy to re-roll

Thanks for taking a look at this series

Phillip

>> ---
>>  Documentation/git-rebase.txt            |  27 ++++-
>>  builtin/rebase.c                        |  49 ++++++--
>>  sequencer.c                             | 141 ++++++++++++++++++++++--
>>  sequencer.h                             |   2 +
>>  t/t3422-rebase-incompatible-options.sh  |   2 -
>>  t/t3433-rebase-options-compatibility.sh | 131 ++++++++++++++++++++++
>>  7 files changed, 327 insertions(+), 28 deletions(-)
>>  create mode 100755 t/t3433-rebase-options-compatibility.sh
>>
>> diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
>> index 0c4f038dd6..1d0e2d27cc 100644
>> --- a/Documentation/git-rebase.txt
>> +++ b/Documentation/git-rebase.txt
>> @@ -393,16 +393,31 @@ your branch contains commits which were dropped, this option can be used
>>  with `--keep-base` in order to drop those commits from your branch.
>>
>>  --ignore-whitespace::
>> +       Behaves differently depending on which backend is selected.
>> ++
>> +'am' backend: When applying a patch, ignore changes in whitespace in
>> +context lines if necessary.
>> ++
>> +'interactive' backend: Treat lines with only whitespace changes as
>> +unchanged for the sake of a three-way merge.
>> +
>>  --whitespace=<option>::
>> -       These flag are passed to the 'git apply' program
>> +       This flag is passed to the 'git apply' program
>>         (see linkgit:git-apply[1]) that applies the patch.
>>  +
>>  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
>> -       of the rebased commits (see linkgit:git-am[1]).
>> +--reset-author-date::
>> +       By default, the author date of the original commit is used
>> +       as the author date for the resulting commit.  This option
>> +       tells Git to use the current timestamp instead and implies
>> +       `--force-rebase`.
>>  +
>>  See also INCOMPATIBLE OPTIONS below.
>>
>> @@ -539,10 +554,7 @@ INCOMPATIBLE OPTIONS
>>
>>  The following options:
>>
>> - * --committer-date-is-author-date
>> - * --ignore-date
>>   * --whitespace
>> - * --ignore-whitespace
>>   * -C
>>
>>  are incompatible with the following options:
>> @@ -565,6 +577,9 @@ In addition, the following pairs of options are incompatible:
>>   * --preserve-merges and --interactive
>>   * --preserve-merges and --signoff
>>   * --preserve-merges and --rebase-merges
>> + * --preserve-merges and --ignore-whitespace
>> + * --preserve-merges and --committer-date-is-author-date
>> + * --preserve-merges and --ignore-date
>>   * --keep-base and --onto
>>   * --keep-base and --root
>>
>> diff --git a/builtin/rebase.c b/builtin/rebase.c
>> index 8081741f8a..e354ec84bb 100644
>> --- a/builtin/rebase.c
>> +++ b/builtin/rebase.c
>> @@ -79,8 +79,11 @@ struct rebase_options {
>>         int allow_rerere_autoupdate;
>>         int keep_empty;
>>         int autosquash;
>> +       int ignore_whitespace;
>>         char *gpg_sign_opt;
>>         int autostash;
>> +       int committer_date_is_author_date;
>> +       int ignore_date;
>>         char *cmd;
>>         int allow_empty_message;
>>         int rebase_merges, rebase_cousins;
>> @@ -99,6 +102,7 @@ struct rebase_options {
>>
>>  static struct replay_opts get_replay_opts(const struct rebase_options *opts)
>>  {
>> +       struct strbuf strategy_buf = STRBUF_INIT;
>>         struct replay_opts replay = REPLAY_OPTS_INIT;
>>
>>         replay.action = REPLAY_INTERACTIVE_REBASE;
>> @@ -112,10 +116,20 @@ static struct replay_opts get_replay_opts(const 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.ignore_date = opts->ignore_date;
>>         replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
>>         replay.strategy = opts->strategy;
>> +
>>         if (opts->strategy_opts)
>> -               parse_strategy_opts(&replay, opts->strategy_opts);
>> +               strbuf_addstr(&strategy_buf, opts->strategy_opts);
>> +       if (opts->ignore_whitespace)
>> +               strbuf_addstr(&strategy_buf, " --ignore-space-change");
>> +       if (strategy_buf.len)
>> +               parse_strategy_opts(&replay, strategy_buf.buf);
>> +
>> +       strbuf_release(&strategy_buf);
>>
>>         if (opts->squash_onto) {
>>                 oidcpy(&replay.squash_onto, opts->squash_onto);
>> @@ -517,6 +531,8 @@ int cmd_rebase__interactive(int argc, const char **argv, const char *prefix)
>>         argc = parse_options(argc, argv, prefix, options,
>>                         builtin_rebase_interactive_usage, PARSE_OPT_KEEP_ARGV0);
>>
>> +       opts.strategy_opts = xstrdup_or_null(opts.strategy_opts);
>> +
>>         if (!is_null_oid(&squash_onto))
>>                 opts.squash_onto = &squash_onto;
>>
>> @@ -970,6 +986,12 @@ static int run_am(struct rebase_options *opts)
>>         am.git_cmd = 1;
>>         argv_array_push(&am.args, "am");
>>
>> +       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->ignore_date)
>> +               argv_array_push(&opts->git_am_opts, "--ignore-date");
>>         if (opts->action && !strcmp("continue", opts->action)) {
>>                 argv_array_push(&am.args, "--resolved");
>>                 argv_array_pushf(&am.args, "--resolvemsg=%s", resolvemsg);
>> @@ -1437,16 +1459,17 @@ 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, "ignore-whitespace", &options.git_am_opts,
>> -                                 NULL, N_("passed to 'git am'"),
>> -                                 PARSE_OPT_NOARG),
>> -               OPT_PASSTHRU_ARGV(0, "committer-date-is-author-date",
>> -                                 &options.git_am_opts, NULL,
>> -                                 N_("passed to 'git am'"), PARSE_OPT_NOARG),
>> -               OPT_PASSTHRU_ARGV(0, "ignore-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_BOOL(0, "reset-author-date", &options.ignore_date,
>> +                        N_("ignore author date and use current date")),
>> +               OPT_HIDDEN_BOOL(0, "ignore-date", &options.ignore_date,
>> +                               N_("synonym of --reset-author-date")),
>>                 OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
>>                                   N_("passed to 'git apply'"), 0),
>> +               OPT_BOOL(0, "ignore-whitespace", &options.ignore_whitespace,
>> +                        N_("ignore changes in whitespace")),
>>                 OPT_PASSTHRU_ARGV(0, "whitespace", &options.git_am_opts,
>>                                   N_("action"), N_("passed to 'git apply'"), 0),
>>                 OPT_BIT('f', "force-rebase", &options.flags,
>> @@ -1719,11 +1742,13 @@ 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.ignore_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") ||
>> -                   !strcmp(option, "--whitespace=fix") ||
>> +               if (!strcmp(option, "--whitespace=fix") ||
>>                     !strcmp(option, "--whitespace=strip"))
>>                         options.flags |= REBASE_FORCE;
>>                 else if (skip_prefix(option, "-C", &p)) {
>> diff --git a/sequencer.c b/sequencer.c
>> index b9dbf1adb0..763ccbbc45 100644
>> --- a/sequencer.c
>> +++ b/sequencer.c
>> @@ -147,6 +147,8 @@ 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_ignore_date, "rebase-merge/ignore_date")
>>  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")
>> @@ -823,9 +825,19 @@ int read_author_script(const char *path, char **name, char **email, char **date,
>>                 error(_("missing 'GIT_AUTHOR_DATE'"));
>>         if (date_i < 0 || email_i < 0 || date_i < 0 || err)
>>                 goto finish;
>> -       *name = kv.items[name_i].util;
>> -       *email = kv.items[email_i].util;
>> -       *date = kv.items[date_i].util;
>> +
>> +       if (name)
>> +               *name = kv.items[name_i].util;
>> +       else
>> +               free(kv.items[name_i].util);
>> +       if (email)
>> +               *email = kv.items[email_i].util;
>> +       else
>> +               free(kv.items[email_i].util);
>> +       if (date)
>> +               *date = kv.items[date_i].util;
>> +       else
>> +               free(kv.items[date_i].util);
>>         retval = 0;
>>  finish:
>>         string_list_clear(&kv, !!retval);
>> @@ -868,6 +880,47 @@ 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;
>> +}
>> +
>> +/* Construct a free()able author string with current time as the author date */
>> +static char *ignore_author_date(const char *author)
>> +{
>> +       int len = strlen(author);
>> +       struct ident_split ident;
>> +       struct strbuf new_author = STRBUF_INIT;
>> +
>> +       if (split_ident_line(&ident, author, len) < 0) {
>> +               error(_("malformed ident line"));
>> +               return NULL;
>> +       }
>> +       len = ident.mail_end - ident.name_begin + 1;
>> +
>> +       strbuf_addf(&new_author, "%.*s ", len, ident.name_begin);
>> +       datestamp(&new_author);
>> +       return strbuf_detach(&new_author, NULL);
>> +}
>> +
>> +static void push_dates(struct child_process *child, int change_committer_date)
>> +{
>> +       time_t now = time(NULL);
>> +       struct strbuf date = STRBUF_INIT;
>> +
>> +       strbuf_addf(&date, "@%"PRIuMAX, (uintmax_t)now);
>> +       argv_array_pushf(&child->env_array, "GIT_AUTHOR_DATE=%s", date.buf);
>> +       if (change_committer_date)
>> +               argv_array_pushf(&child->env_array, "GIT_COMMITTER_DATE=%s", date.buf);
>> +       strbuf_release(&date);
>> +}
>> +
>>  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"
>> @@ -927,6 +980,25 @@ static int run_git_commit(struct repository *r,
>>
>>         cmd.git_cmd = 1;
>>
>> +       if (opts->committer_date_is_author_date) {
>> +               int res = -1;
>> +               struct strbuf datebuf = STRBUF_INIT;
>> +               char *date = read_author_date_or_null();
>> +
>> +               if (!date)
>> +                       return -1;
>> +
>> +               strbuf_addf(&datebuf, "@%s", date);
>> +               res = setenv("GIT_COMMITTER_DATE",
>> +                            opts->ignore_date ? "" : datebuf.buf, 1);
>> +
>> +               strbuf_release(&datebuf);
>> +               free(date);
>> +
>> +               if (res)
>> +                       return -1;
>> +       }
>> +
>>         if (is_rebase_i(opts) && read_env_script(&cmd.env_array)) {
>>                 const char *gpg_opt = gpg_sign_opt_quoted(opts);
>>
>> @@ -942,6 +1014,8 @@ static int run_git_commit(struct repository *r,
>>                 argv_array_push(&cmd.args, "--amend");
>>         if (opts->gpg_sign)
>>                 argv_array_pushf(&cmd.args, "-S%s", opts->gpg_sign);
>> +       if (opts->ignore_date)
>> +               push_dates(&cmd, opts->committer_date_is_author_date);
>>         if (defmsg)
>>                 argv_array_pushl(&cmd.args, "-F", defmsg, NULL);
>>         else if (!(flags & EDIT_MSG))
>> @@ -1310,14 +1384,13 @@ static int try_to_commit(struct repository *r,
>>         struct commit_extra_header *extra = NULL;
>>         struct strbuf err = STRBUF_INIT;
>>         struct strbuf commit_msg = STRBUF_INIT;
>> -       char *amend_author = NULL;
>> +       char *author_to_free = NULL;
>>         const char *hook_commit = NULL;
>>         enum commit_msg_cleanup_mode cleanup;
>>         int res = 0;
>>
>>         if (parse_head(r, &current_head))
>>                 return -1;
>> -
>>         if (flags & AMEND_MSG) {
>>                 const char *exclude_gpgsig[] = { "gpgsig", NULL };
>>                 const char *out_enc = get_commit_output_encoding();
>> @@ -1332,7 +1405,7 @@ static int try_to_commit(struct repository *r,
>>                         strbuf_addstr(msg, orig_message);
>>                         hook_commit = "HEAD";
>>                 }
>> -               author = amend_author = get_author(message);
>> +               author = author_to_free = get_author(message);
>>                 unuse_commit_buffer(current_head, message);
>>                 if (!author) {
>>                         res = error(_("unable to parse commit author"));
>> @@ -1345,6 +1418,31 @@ static int try_to_commit(struct repository *r,
>>                 commit_list_insert(current_head, &parents);
>>         }
>>
>> +       if (opts->committer_date_is_author_date) {
>> +               int len = strlen(author);
>> +               struct ident_split ident;
>> +               struct strbuf date = STRBUF_INIT;
>> +
>> +               if (split_ident_line(&ident, author, len) < 0) {
>> +                       res = error(_("malformed ident line"));
>> +                       goto out;
>> +               }
>> +               if (!ident.date_begin) {
>> +                       res = error(_("corrupted author without date information"));
>> +                       goto out;
>> +               }
>> +
>> +               strbuf_addf(&date, "@%.*s %.*s",
>> +                           (int)(ident.date_end - ident.date_begin), ident.date_begin,
>> +                           (int)(ident.tz_end - ident.tz_begin), ident.tz_begin);
>> +               res = setenv("GIT_COMMITTER_DATE",
>> +                            opts->ignore_date ? "" : date.buf, 1);
>> +               strbuf_release(&date);
>> +
>> +               if (res)
>> +                       goto out;
>> +       }
>> +
>>         if (write_index_as_tree(&tree, r->index, r->index_file, 0, NULL)) {
>>                 res = error(_("git write-tree failed to write a tree"));
>>                 goto out;
>> @@ -1404,6 +1502,15 @@ static int try_to_commit(struct repository *r,
>>
>>         reset_ident_date();
>>
>> +       if (opts->ignore_date) {
>> +               author = ignore_author_date(author);
>> +               if (!author) {
>> +                       res = -1;
>> +                       goto out;
>> +               }
>> +               free(author_to_free);
>> +               author_to_free = (char *)author;
>> +       }
>>         if (commit_tree_extended(msg->buf, msg->len, &tree, parents,
>>                                  oid, author, opts->gpg_sign, extra)) {
>>                 res = error(_("failed to write commit object"));
>> @@ -1424,7 +1531,7 @@ static int try_to_commit(struct repository *r,
>>         free_commit_extra_headers(extra);
>>         strbuf_release(&err);
>>         strbuf_release(&commit_msg);
>> -       free(amend_author);
>> +       free(author_to_free);
>>
>>         return res;
>>  }
>> @@ -2492,6 +2599,16 @@ 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_ignore_date())) {
>> +                       opts->allow_ff = 0;
>> +                       opts->ignore_date = 1;
>> +               }
>> +
>>                 if (file_exists(rebase_path_reschedule_failed_exec()))
>>                         opts->reschedule_failed_exec = 1;
>>
>> @@ -2574,6 +2691,10 @@ 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->ignore_date)
>> +               write_file(rebase_path_ignore_date(), "%s", "");
>>         if (opts->reschedule_failed_exec)
>>                 write_file(rebase_path_reschedule_failed_exec(), "%s", "");
>>
>> @@ -3514,6 +3635,8 @@ static int do_merge(struct repository *r,
>>                 argv_array_push(&cmd.args, git_path_merge_msg(r));
>>                 if (opts->gpg_sign)
>>                         argv_array_push(&cmd.args, opts->gpg_sign);
>> +               if (opts->ignore_date)
>> +                       push_dates(&cmd, opts->committer_date_is_author_date);
>>
>>                 /* Add the tips to be merged */
>>                 for (j = to_merge; j; j = j->next)
>> @@ -3786,7 +3909,9 @@ 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 ||
>> +                               opts->ignore_date));
>>         if (read_and_refresh_cache(r, opts))
>>                 return -1;
>>
>> diff --git a/sequencer.h b/sequencer.h
>> index 9f9ae291e3..e9a0e03ea2 100644
>> --- a/sequencer.h
>> +++ b/sequencer.h
>> @@ -43,6 +43,8 @@ struct replay_opts {
>>         int verbose;
>>         int quiet;
>>         int reschedule_failed_exec;
>> +       int committer_date_is_author_date;
>> +       int ignore_date;
>>
>>         int mainline;
>>
>> diff --git a/t/t3422-rebase-incompatible-options.sh b/t/t3422-rebase-incompatible-options.sh
>> index 50e7960702..c8234062c6 100755
>> --- a/t/t3422-rebase-incompatible-options.sh
>> +++ b/t/t3422-rebase-incompatible-options.sh
>> @@ -61,8 +61,6 @@ test_rebase_am_only () {
>>  }
>>
>>  test_rebase_am_only --whitespace=fix
>> -test_rebase_am_only --ignore-whitespace
>> -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
>> new file mode 100755
>> index 0000000000..5166f158dd
>> --- /dev/null
>> +++ b/t/t3433-rebase-options-compatibility.sh
>> @@ -0,0 +1,131 @@
>> +#!/bin/sh
>> +#
>> +# Copyright (c) 2019 Rohit Ashiwal
>> +#
>> +
>> +test_description='tests to ensure compatibility between am and interactive backends'
>> +
>> +. ./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.
>> +test_expect_success 'setup' '
>> +       git checkout -b topic &&
>> +       q_to_tab >file <<-\EOF &&
>> +       line 1
>> +       Qline 2
>> +       line 3
>> +       EOF
>> +       git add file &&
>> +       git commit -m "add file" &&
>> +       cat >file <<-\EOF &&
>> +       line 1
>> +       new line 2
>> +       line 3
>> +       EOF
>> +       git commit -am "update file" &&
>> +       git tag side &&
>> +       test_commit commit1 foo foo1 &&
>> +       test_commit commit2 foo foo2 &&
>> +       test_commit commit3 foo foo3 &&
>> +
>> +       git checkout --orphan master &&
>> +       git rm --cached foo &&
>> +       rm foo &&
>> +       sed -e "s/^|//" >file <<-\EOF &&
>> +       |line 1
>> +       |        line 2
>> +       |line 3
>> +       EOF
>> +       git add file &&
>> +       git commit -m "add file" &&
>> +       git tag main
>> +'
>> +
>> +test_expect_success '--ignore-whitespace works with am backend' '
>> +       cat >expect <<-\EOF &&
>> +       line 1
>> +       new line 2
>> +       line 3
>> +       EOF
>> +       test_must_fail git rebase main side &&
>> +       git rebase --abort &&
>> +       git rebase --ignore-whitespace main side &&
>> +       test_cmp expect file
>> +'
>> +
>> +test_expect_success '--ignore-whitespace works with interactive backend' '
>> +       cat >expect <<-\EOF &&
>> +       line 1
>> +       new line 2
>> +       line 3
>> +       EOF
>> +       test_must_fail git rebase --merge main side &&
>> +       git rebase --abort &&
>> +       git rebase --merge --ignore-whitespace main side &&
>> +       test_cmp expect file
>> +'
>> +
>> +test_expect_success '--committer-date-is-author-date works with am backend' '
>> +       git commit --amend &&
>> +       git rebase --committer-date-is-author-date HEAD^ &&
>> +       git show HEAD --pretty="format:%ai" >authortime &&
>> +       git show HEAD --pretty="format:%ci" >committertime &&
>> +       test_cmp authortime committertime
>> +'
>> +
>> +test_expect_success '--committer-date-is-author-date works with interactive backend' '
>> +       git commit --amend &&
>> +       git rebase -i --committer-date-is-author-date HEAD^ &&
>> +       git show HEAD --pretty="format:%ai" >authortime &&
>> +       git show HEAD --pretty="format:%ci" >committertime &&
>> +       test_cmp authortime committertime
>> +'
>> +
>> +test_expect_success '--committer-date-is-author-date works with rebase -r' '
>> +       git checkout side &&
>> +       git merge --no-ff commit3 &&
>> +       git rebase -r --root --committer-date-is-author-date &&
>> +       git rev-list HEAD >rev_list &&
>> +       while read HASH
>> +       do
>> +               git show $HASH --pretty="format:%ai" >authortime
>> +               git show $HASH --pretty="format:%ci" >committertime
>> +               test_cmp authortime committertime
>> +       done <rev_list
>> +'
>> +
>> +# Checking for +0000 in author time is enough since default
>> +# timezone is UTC, but the timezone used while committing
>> +# sets to +0530.
>> +test_expect_success '--ignore-date works with am backend' '
>> +       git commit --amend --date="$GIT_AUTHOR_DATE" &&
>> +       git rebase --ignore-date HEAD^ &&
>> +       git show HEAD --pretty="format:%ai" >authortime &&
>> +       grep "+0000" authortime
>> +'
>> +
>> +test_expect_success '--ignore-date works with interactive backend' '
>> +       git commit --amend --date="$GIT_AUTHOR_DATE" &&
>> +       git rebase --ignore-date -i HEAD^ &&
>> +       git show HEAD --pretty="format:%ai" >authortime &&
>> +       grep "+0000" authortime
>> +'
>> +
>> +test_expect_success '--ignore-date works with rebase -r' '
>> +       git checkout side &&
>> +       git merge --no-ff commit3 &&
>> +       git rebase -r --root --ignore-date &&
>> +       git rev-list HEAD >rev_list &&
>> +       while read HASH
>> +       do
>> +               git show $HASH --pretty="format:%ai" >authortime
>> +               grep "+0000" authortime
>> +       done <rev_list
>> +'
>> +
>> +test_done
>> --
>> 2.26.0
>>