Re: [PATCH v3 0/6] rebase -i: support more options

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Hi Rohit

On 20/08/2019 04:45, Rohit Ashiwal wrote:
I've tries to incorporated all the suggestions.

It is helpful if you can list the changes to remind us all what we said. (as a patch author I find composing that is helpful to remind me if there's anything I've forgotten to address)

Also there are a couple of things that were discussed such as splitting up the author and passing it round as a <name, email, date, tz> tuple and testing a non-default timezone which aren't included - that's fine but it helps if you take a moment to explain why in the cover letter.


Some points:
   - According to v2.0.0's git-am.sh, ignore-date should override
     committer-date-is-author-date. Ergo, we are not barfing out
     when both flags are provided.
   - Should the 'const' qualifier be removed[2]? Since it is leaving
     a false impression that author should not be free()'d.

The author returned by read_author_ident() is owned by the strbuf that you pass to read_author_ident() which is confusing.

Best Wishes

Phillip


[1]: git show v2.0.0:git-am.sh
[2]: https://github.com/git/git/blob/v2.23.0/sequencer.c#L959

Rohit Ashiwal (6):
   rebase -i: add --ignore-whitespace flag
   sequencer: add NULL checks under read_author_script
   rebase -i: support --committer-date-is-author-date
   sequencer: rename amend_author to author_to_rename
   rebase -i: support --ignore-date
   rebase: add --reset-author-date

  Documentation/git-rebase.txt            |  26 +++--
  builtin/rebase.c                        |  53 +++++++---
  sequencer.c                             | 135 ++++++++++++++++++++++--
  sequencer.h                             |   2 +
  t/t3422-rebase-incompatible-options.sh  |   2 -
  t/t3433-rebase-options-compatibility.sh | 100 ++++++++++++++++++
  6 files changed, 289 insertions(+), 29 deletions(-)
  create mode 100755 t/t3433-rebase-options-compatibility.sh

Range-diff:
1:  4cd0aa3084 ! 1:  e82ed8cad5 rebase -i: add --ignore-whitespace flag
     @@ -19,10 +19,13 @@
       default is `--no-fork-point`, otherwise the default is `--fork-point`.
--ignore-whitespace::
     -+	This flag is either passed to the 'git apply' program
     -+	(see linkgit:git-apply[1]), or to 'git merge' program
     -+	(see linkgit:git-merge[1]) as `-Xignore-space-change`,
     -+	depending on which backend is selected by other options.
     ++	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
     @@ -63,7 +66,7 @@
static struct replay_opts get_replay_opts(const struct rebase_options *opts)
       {
     -+	char *strategy_opts = opts->strategy_opts;
     ++	struct strbuf strategy_buf = STRBUF_INIT;
       	struct replay_opts replay = REPLAY_OPTS_INIT;
replay.action = REPLAY_INTERACTIVE_REBASE;
     @@ -71,24 +74,19 @@
       	replay.reschedule_failed_exec = opts->reschedule_failed_exec;
       	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);
     -+
     -+	if (opts->ignore_whitespace) {
     -+		struct strbuf buf = STRBUF_INIT;
     -+
     -+		if (strategy_opts)
     -+			strbuf_addstr(&buf, strategy_opts);
      +
     -+		strbuf_addstr(&buf, " --ignore-space-change");
     -+		free(strategy_opts);
     -+		strategy_opts = strbuf_detach(&buf, NULL);
     -+	}
     -+	if (strategy_opts)
     -+		parse_strategy_opts(&replay, strategy_opts);
     + 	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);
       	return replay;
       }
     +
      @@
       	argc = parse_options(argc, argv, prefix, options,
       			builtin_rebase_interactive_usage, PARSE_OPT_KEEP_ARGV0);
2:  e2c0304587 = 2:  209057b361 sequencer: add NULL checks under read_author_script
3:  6aed57ae2e ! 3:  a4e6644ef8 rebase -i: support --committer-date-is-author-date
     @@ -21,10 +21,12 @@
      +
       --ignore-date::
      -	These flags are passed to 'git am' to easily change the dates
     +-	of the rebased commits (see linkgit:git-am[1]).
      +	This flag is passed to 'git am' to change the author date
     - 	of the rebased commits (see linkgit:git-am[1]).
     ++	of each rebased commit (see linkgit:git-am[1]).
       +
       See also INCOMPATIBLE OPTIONS below.
     +
      @@
The following options:
     @@ -62,16 +64,6 @@
       	replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
       	replay.strategy = opts->strategy;
-@@
     - 		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);
     - }
     -
      @@
if (opts->ignore_whitespace)
     @@ -149,14 +141,14 @@
      +		struct strbuf datebuf = STRBUF_INIT;
      +		char *date = read_author_date_or_null();
      +
     ++		if (!date)
     ++			return -1;
     ++
      +		strbuf_addf(&datebuf, "@%s", date);
      +		free(date);
      +
      +		date = strbuf_detach(&datebuf, &len);
     -+
     -+		if (len > 1)
     -+			res = setenv("GIT_COMMITTER_DATE", date, 1);
     -+
     ++		res = setenv("GIT_COMMITTER_DATE", date, 1);
      +		free(date);
      +
      +		if (res)
     @@ -187,7 +179,7 @@
      +		if (!ident.date_begin)
      +			return error(_("corrupted author without date information"));
      +
     -+		strbuf_addf(&date, "@%s",ident.date_begin);
     ++		strbuf_addf(&date, "@%s", ident.date_begin);
      +		setenv("GIT_COMMITTER_DATE", date.buf, 1);
      +		strbuf_release(&date);
      +	}
4:  36a0c017c2 = 4:  6ac1885c54 sequencer: rename amend_author to author_to_rename
5:  3a4ffeb995 ! 5:  a69749dd67 rebase -i: support --ignore-date
     @@ -16,9 +16,9 @@
--ignore-date::
      -	This flag is passed to 'git am' to change the author date
     --	of the rebased commits (see linkgit:git-am[1]).
     -+	Instead of using the given author date, re-set it to the value
     -+	same as committer (current) date. This implies --force-rebase.
     +-	of each rebased commit (see linkgit:git-am[1]).
     ++	Instead of using the given author date, reset it to the value
     ++	same as the current time. This implies --force-rebase.
       +
       See also INCOMPATIBLE OPTIONS below.
@@ -58,18 +58,6 @@
       	replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt);
       	replay.strategy = opts->strategy;
-@@
     - 		warning(_("--[no-]rebase-cousins has no effect without "
     - 			  "--rebase-merges"));
     -
     --	if (opts.committer_date_is_author_date)
     -+	if (opts.ignore_date)
     -+		opts.committer_date_is_author_date = 0;
     -+	if (opts.committer_date_is_author_date ||
     -+	    opts.ignore_date)
     - 		opts.flags |= REBASE_FORCE;
     -
     - 	return !!run_rebase_interactive(&opts, command);
      @@
       		argv_array_push(&am.args, "--ignore-whitespace");
       	if (opts->committer_date_is_author_date)
     @@ -125,18 +113,19 @@
       	return buf->buf;
       }
-+static void ignore_author_date(const char **author)
     ++/* 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);
     ++	int len = strlen(author);
      +	struct ident_split ident;
      +	struct strbuf new_author = STRBUF_INIT;
      +
     -+	split_ident_line(&ident, *author, len);
     ++	split_ident_line(&ident, author, len);
      +	len = ident.mail_end - ident.name_begin + 1;
      +
     -+	strbuf_addf(&new_author, "%.*s", len, *author);
     ++	strbuf_addf(&new_author, "%.*s ", len, author);
      +	datestamp(&new_author);
     -+	*author = strbuf_detach(&new_author, NULL);
     ++	return strbuf_detach(&new_author, NULL);
      +}
      +
      +static void push_dates(struct child_process *child)
     @@ -160,11 +149,13 @@
      -		else
      +		else {
      +			if (opts->ignore_date) {
     ++				char *new_author = ignore_author_date(author);
      +				if (!author)
      +					BUG("ignore-date can only be used with "
      +					    "rebase, which must set the author "
      +					    "before committing the tree");
     -+				ignore_author_date(&author);
     ++				free((void *)author);
     ++				author = new_author;
      +			}
       			res = commit_tree(msg.buf, msg.len, cache_tree_oid,
       					  NULL, &root_commit, author,
     @@ -187,7 +178,7 @@
       	reset_ident_date();
+ if (opts->ignore_date) {
     -+		ignore_author_date(&author);
     ++		author = ignore_author_date(author);
      +		free(author_to_free);
      +		author_to_free = (char *)author;
      +	}
6:  cb81e6c4e5 ! 6:  210d15cca0 rebase: add --author-date-is-committer-date
     @@ -1,6 +1,6 @@
      Author: Rohit Ashiwal <rohit.ashiwal265@xxxxxxxxx>
- rebase: add --author-date-is-committer-date
     +    rebase: add --reset-author-date
The previous commit introduced --ignore-date flag to interactive
          rebase, but the name is actually very vague in context of rebase -i
     @@ -16,9 +16,9 @@
       	as the committer date. This implies --force-rebase.
--ignore-date::
     -+--author-date-is-committer-date::
     - 	Instead of using the given author date, re-set it to the value
     - 	same as committer (current) date. This implies --force-rebase.
     ++--reset-author-date::
     + 	Instead of using the given author date, reset it to the value
     + 	same as the current time. This implies --force-rebase.
       +
diff --git a/builtin/rebase.c b/builtin/rebase.c
     @@ -28,7 +28,7 @@
       		OPT_BOOL(0, "committer-date-is-author-date",
       			 &options.committer_date_is_author_date,
       			 N_("make committer date match author date")),
     -+		OPT_BOOL(0, "author-date-is-committer-date", &options.ignore_date,
     ++		OPT_BOOL(0, "reset-author-date", &options.ignore_date,
      +			 "ignore author date and use current date"),
       		OPT_BOOL(0, "ignore-date", &options.ignore_date,
       			 "ignore author date and use current date"),




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