From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
Eric Sunshine <sunshine@sunshineco.com>
Subject: Re: [PATCH 2/2] format-patch: allow for independent diff & range-diff options
Date: Thu, 29 Nov 2018 16:41:50 +0100 (STD) [thread overview]
Message-ID: <nycvar.QRO.7.76.6.1811291641090.41@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <871s74yms3.fsf@evledraar.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 12845 bytes --]
Hi Ævar,
On Thu, 29 Nov 2018, Ævar Arnfjörð Bjarmason wrote:
> On Thu, Nov 29 2018, Johannes Schindelin wrote:
>
> > On Thu, 29 Nov 2018, Ævar Arnfjörð Bjarmason wrote:
> >
> >> On Thu, Nov 29 2018, Johannes Schindelin wrote:
> >>
> >> > On Wed, 28 Nov 2018, Ævar Arnfjörð Bjarmason wrote:
> >> >
> >> >> Change the semantics of the "--range-diff" option so that the regular
> >> >> diff options can be provided separately for the range-diff and the
> >> >> patch. This allows for supplying e.g. --range-diff-U0 and -U1 to
> >> >> "format-patch" to provide different context for the range-diff and the
> >> >> patch. This wasn't possible before.
> >> >
> >> > I really, really dislike the `--range-diff-<random-thing>`. We have
> >> > precedent for passing optional arguments that are passed to some other
> >> > command, so a much more logical and consistent convention would be to use
> >> > `--range-diff[=<diff-option>..]`, allowing all of the diff options that
> >> > you might want to pass to the outer diff in one go rather than having a
> >> > lengthy string of `--range-diff-this` and `--range-diff-that` options.
> >>
> >> Where do we pass those sorts of arguments?
> >>
> >> Reasons I did it this way:
> >>
> >> a) Passing it as one option will require the user to double-quote those
> >> options that take quoted arguments (e.g. --word-diff-regex), which I
> >> thought sucked more than the prefix. On the implementation side we
> >> couldn't leave the parsing of the command-line to the shell anymore.
> >>
> >> b) I think people will want to tweak this very rarely, much more rarely
> >> than e.g. -U10 in format-patch itself, so having something long-ish
> >> doesn't sound bad.
> >
> > Hmm. I still don't like it. It sets a precedent, and we simply do not do
> > it that way in other circumstances (most obvious would be the -X merge
> > options). The more divergent user interfaces for the same sort of thing
> > are, the more brain cycles you force users to spend on navigating said
> > interfaces.
>
> Yeah it sucks, I just think it sucks less than the alternative :)
> I.e. I'm not picky about --range-diff-* prefix the name, but I think
> doing our own shell parsing would be nasty.
What prevents you from using `sq_dequote_to_argv()`?
> >> > I only had time to skim the patch, and I have to wonder why you pass
> >> > around full-blown `rev_info` structs for range diff (and with that really
> >> > awful name `rd_rev`) rather than just the `diff_options` that you
> >> > *actually* care about?
> >>
> >> Because setup_revisions() which does all the command-line parsing needs
> >> a rev_info, so even if we only need the diffopt in the end we need to
> >> initiate the whole thing.
> >>
> >> Suggestions for a better varibale name most welcome.
> >
> > `range_diff_revs`
> >
> > And you do not need to pass around the whole thing. You can easily pass
> > `&range_diff_revs.diffopt`.
> >
> > Don't pass around what you do not need to pass around.
>
> Ah, you mean internally in log.c, yes that makes sense. I thought you
> meant just pass diffopt to setup_revisions() (which needs the containing
> struct). Willdo.
Thanks,
Dscho
>
> > Ciao,
> > Dscho
> >
> >>
> >> > Ciao,
> >> > Dscho
> >> >
> >> >>
> >> >> Ever since the "--range-diff" option was added in
> >> >> 31e2617a5f ("format-patch: add --range-diff option to embed diff in
> >> >> cover letter", 2018-07-22) the "rev->diffopt" we pass down to the diff
> >> >> machinery has been the one we get from "format-patch"'s own
> >> >> setup_revisions().
> >> >>
> >> >> This sort of thing is unique among the log-like commands in
> >> >> builtin/log.c, no command than format-patch will embed the output of
> >> >> another log-like command. Since the "rev->diffopt" is reused we need
> >> >> to munge it before we pass it to show_range_diff(). See
> >> >> 43dafc4172 ("format-patch: don't include --stat with --range-diff
> >> >> output", 2018-11-22) for a related regression fix which is being
> >> >> mostly reverted here.
> >> >>
> >> >> Implementation notes: 1) We're not bothering with the full teardown
> >> >> around die() and will leak memory, but it's too much boilerplate to do
> >> >> all the frees with/without the die() and not worth it. 2) We call
> >> >> repo_init_revisions() for "rd_rev" even though we could get away with
> >> >> a shallow copy like the code we're replacing (and which
> >> >> show_range_diff() itself does). This is to make this code more easily
> >> >> understood.
> >> >>
> >> >> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> >> >> ---
> >> >> Documentation/git-format-patch.txt | 10 ++++++-
> >> >> builtin/log.c | 42 +++++++++++++++++++++++-------
> >> >> t/t3206-range-diff.sh | 41 +++++++++++++++++++++++++++++
> >> >> 3 files changed, 82 insertions(+), 11 deletions(-)
> >> >>
> >> >> diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
> >> >> index aba4c5febe..6c048f415f 100644
> >> >> --- a/Documentation/git-format-patch.txt
> >> >> +++ b/Documentation/git-format-patch.txt
> >> >> @@ -24,7 +24,8 @@ SYNOPSIS
> >> >> [--to=<email>] [--cc=<email>]
> >> >> [--[no-]cover-letter] [--quiet] [--notes[=<ref>]]
> >> >> [--interdiff=<previous>]
> >> >> - [--range-diff=<previous> [--creation-factor=<percent>]]
> >> >> + [--range-diff=<previous> [--creation-factor=<percent>]
> >> >> + [--range-diff<common diff option>]]
> >> >> [--progress]
> >> >> [<common diff options>]
> >> >> [ <since> | <revision range> ]
> >> >> @@ -257,6 +258,13 @@ feeding the result to `git send-email`.
> >> >> creation/deletion cost fudge factor. See linkgit:git-range-diff[1])
> >> >> for details.
> >> >>
> >> >> +--range-diff<common diff option>::
> >> >> + Other options prefixed with `--range-diff` are stripped of
> >> >> + that prefix and passed as-is to the diff machinery used to
> >> >> + generate the range-diff, e.g. `--range-diff-U0` and
> >> >> + `--range-diff--no-color`. This allows for adjusting the format
> >> >> + of the range-diff independently from the patch itself.
> >> >> +
> >> >> --notes[=<ref>]::
> >> >> Append the notes (see linkgit:git-notes[1]) for the commit
> >> >> after the three-dash line.
> >> >> diff --git a/builtin/log.c b/builtin/log.c
> >> >> index 02d88fa233..7658e56ecc 100644
> >> >> --- a/builtin/log.c
> >> >> +++ b/builtin/log.c
> >> >> @@ -1023,7 +1023,8 @@ static void show_diffstat(struct rev_info *rev,
> >> >> fprintf(rev->diffopt.file, "\n");
> >> >> }
> >> >>
> >> >> -static void make_cover_letter(struct rev_info *rev, int use_stdout,
> >> >> +static void make_cover_letter(struct rev_info *rev, struct rev_info *rd_rev,
> >> >> + int use_stdout,
> >> >> struct commit *origin,
> >> >> int nr, struct commit **list,
> >> >> const char *branch_name,
> >> >> @@ -1095,13 +1096,9 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
> >> >> }
> >> >>
> >> >> if (rev->rdiff1) {
> >> >> - struct diff_options opts;
> >> >> - memcpy(&opts, &rev->diffopt, sizeof(opts));
> >> >> - opts.output_format &= ~(DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY);
> >> >> -
> >> >> fprintf_ln(rev->diffopt.file, "%s", rev->rdiff_title);
> >> >> show_range_diff(rev->rdiff1, rev->rdiff2,
> >> >> - rev->creation_factor, 1, &opts);
> >> >> + rev->creation_factor, 1, &rd_rev->diffopt);
> >> >> }
> >> >> }
> >> >>
> >> >> @@ -1485,6 +1482,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
> >> >> struct commit *commit;
> >> >> struct commit **list = NULL;
> >> >> struct rev_info rev;
> >> >> + struct rev_info rd_rev;
> >> >> struct setup_revision_opt s_r_opt;
> >> >> int nr = 0, total, i;
> >> >> int use_stdout = 0;
> >> >> @@ -1603,6 +1601,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
> >> >> init_log_defaults();
> >> >> git_config(git_format_config, NULL);
> >> >> repo_init_revisions(the_repository, &rev, prefix);
> >> >> + repo_init_revisions(the_repository, &rd_rev, prefix);
> >> >> rev.commit_format = CMIT_FMT_EMAIL;
> >> >> rev.expand_tabs_in_log_default = 0;
> >> >> rev.verbose_header = 1;
> >> >> @@ -1689,8 +1688,32 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
> >> >> rev.preserve_subject = keep_subject;
> >> >>
> >> >> argc = setup_revisions(argc, argv, &rev, &s_r_opt);
> >> >> - if (argc > 1)
> >> >> - die(_("unrecognized argument: %s"), argv[1]);
> >> >> + if (argc > 1) {
> >> >> + struct argv_array args = ARGV_ARRAY_INIT;
> >> >> + const char *prefix = "--range-diff";
> >> >> + int have_prefix = 0;
> >> >> +
> >> >> + for (i = 0; i < argc; i++) {
> >> >> + struct strbuf sb = STRBUF_INIT;
> >> >> + char *str;
> >> >> +
> >> >> + strbuf_addstr(&sb, argv[i]);
> >> >> + if (starts_with(argv[i], prefix)) {
> >> >> + have_prefix = 1;
> >> >> + strbuf_remove(&sb, 0, strlen(prefix));
> >> >> + }
> >> >> + str = strbuf_detach(&sb, NULL);
> >> >> + strbuf_release(&sb);
> >> >> +
> >> >> + argv_array_push(&args, str);
> >> >> + }
> >> >> +
> >> >> + if (!have_prefix)
> >> >> + die(_("unrecognized argument: %s"), argv[1]);
> >> >> + argc = setup_revisions(args.argc, args.argv, &rd_rev, NULL);
> >> >> + if (argc > 1)
> >> >> + die(_("unrecognized argument: %s"), argv[1]);
> >> >> + }
> >> >>
> >> >> if (rev.diffopt.output_format & DIFF_FORMAT_NAME)
> >> >> die(_("--name-only does not make sense"));
> >> >> @@ -1702,7 +1725,6 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
> >> >> if (!use_patch_format &&
> >> >> (!rev.diffopt.output_format ||
> >> >> rev.diffopt.output_format == DIFF_FORMAT_PATCH))
> >> >> - /* Needs to be mirrored in show_range_diff() invocation */
> >> >> rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY;
> >> >> if (!rev.diffopt.stat_width)
> >> >> rev.diffopt.stat_width = MAIL_DEFAULT_WRAP;
> >> >> @@ -1877,7 +1899,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
> >> >> if (cover_letter) {
> >> >> if (thread)
> >> >> gen_message_id(&rev, "cover");
> >> >> - make_cover_letter(&rev, use_stdout,
> >> >> + make_cover_letter(&rev, &rd_rev, use_stdout,
> >> >> origin, nr, list, branch_name, quiet);
> >> >> print_bases(&bases, rev.diffopt.file);
> >> >> print_signature(rev.diffopt.file);
> >> >> diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
> >> >> index bc5facc1cd..6916103888 100755
> >> >> --- a/t/t3206-range-diff.sh
> >> >> +++ b/t/t3206-range-diff.sh
> >> >> @@ -308,6 +308,35 @@ test_expect_success 'format-patch with <common diff option>' '
> >> >> --range-diff=topic~..topic changed~..changed >actual.raw &&
> >> >> sed -ne "/^1:/,/^--/p" <actual.raw >actual.range-diff &&
> >> >> sed -e "s|:$||" >expect <<-\EOF &&
> >> >> + 1: a63e992 ! 1: d966c5c s/12/B/
> >> >> + @@ -8,7 +8,7 @@
> >> >> + @@
> >> >> + 9
> >> >> + 10
> >> >> + - B
> >> >> + + BB
> >> >> + -12
> >> >> + +B
> >> >> + 13
> >> >> + -- :
> >> >> + EOF
> >> >> + test_cmp expect actual.range-diff &&
> >> >> + sed -ne "/^--- /,/^--/p" <actual.raw >actual.diff &&
> >> >> + sed -e "s|:$||" >expect <<-\EOF &&
> >> >> + --- a/file
> >> >> + +++ b/file
> >> >> + @@ -12 +12 @@ BB
> >> >> + -12
> >> >> + +B
> >> >> + -- :
> >> >> + EOF
> >> >> + test_cmp expect actual.diff &&
> >> >> +
> >> >> + # -U0 & --range-diff-U0
> >> >> + git format-patch --cover-letter --stdout -U0 --range-diff-U0 \
> >> >> + --range-diff=topic~..topic changed~..changed >actual.raw &&
> >> >> + sed -ne "/^1:/,/^--/p" <actual.raw >actual.range-diff &&
> >> >> + sed -e "s|:$||" >expect <<-\EOF &&
> >> >> 1: a63e992 ! 1: d966c5c s/12/B/
> >> >> @@ -11 +11 @@
> >> >> - B
> >> >> @@ -327,4 +356,16 @@ test_expect_success 'format-patch with <common diff option>' '
> >> >> test_cmp expect actual.diff
> >> >> '
> >> >>
> >> >> +test_expect_success 'format-patch option parsing with --range-diff-*' '
> >> >> + test_must_fail git format-patch --stdout --unknown \
> >> >> + master..unmodified 2>stderr &&
> >> >> + test_i18ngrep "unrecognized argument: --unknown" stderr &&
> >> >> + test_must_fail git format-patch --stdout --range-diff-unknown \
> >> >> + master..unmodified 2>stderr &&
> >> >> + test_i18ngrep "unrecognized argument: --range-diff-unknown" stderr &&
> >> >> + test_must_fail git format-patch --stdout --unknown --range-diff-unknown \
> >> >> + master..unmodified 2>stderr &&
> >> >> + test_i18ngrep "unrecognized argument: --unknown" stderr
> >> >> +'
> >> >> +
> >> >> test_done
> >> >> --
> >> >> 2.20.0.rc1.387.gf8505762e3
> >> >>
> >> >>
> >>
>
next prev parent reply other threads:[~2018-11-29 15:41 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-21 15:20 [ANNOUNCE] Git v2.20.0-rc1 Junio C Hamano
2018-11-22 15:58 ` Ævar Arnfjörð Bjarmason
2018-11-22 19:27 ` Eric Sunshine
2018-11-22 21:12 ` [PATCH 0/2] format-patch: pre-2.20 range-diff regression fix Ævar Arnfjörð Bjarmason
2018-11-22 21:12 ` [PATCH 1/2] format-patch: add a more exhaustive --range-diff test Ævar Arnfjörð Bjarmason
2018-11-24 4:14 ` Junio C Hamano
2018-11-24 11:45 ` Ævar Arnfjörð Bjarmason
2018-11-22 21:12 ` [PATCH 2/2] format-patch: don't include --stat with --range-diff output Ævar Arnfjörð Bjarmason
2018-11-24 2:26 ` Junio C Hamano
2018-11-24 4:17 ` Junio C Hamano
2018-11-28 20:18 ` [PATCH 0/2] format-patch: fix root cause of recent regression Ævar Arnfjörð Bjarmason
2018-11-28 20:18 ` [PATCH 1/2] format-patch: add test for --range-diff diff output Ævar Arnfjörð Bjarmason
2018-11-28 20:18 ` [PATCH 2/2] format-patch: allow for independent diff & range-diff options Ævar Arnfjörð Bjarmason
2018-11-29 2:59 ` Junio C Hamano
2018-11-29 10:07 ` Johannes Schindelin
2018-11-29 10:30 ` Ævar Arnfjörð Bjarmason
2018-11-29 12:12 ` Johannes Schindelin
2018-11-29 14:35 ` Ævar Arnfjörð Bjarmason
2018-11-29 15:41 ` Johannes Schindelin [this message]
2018-11-29 16:03 ` Ævar Arnfjörð Bjarmason
2018-11-29 19:03 ` Johannes Schindelin
2018-11-30 2:30 ` Junio C Hamano
2018-11-30 4:27 ` [PATCH] format-patch: do not let its diff-options affect --range-diff (was Re: [PATCH 2/2] format-patch: allow for independent diff & range-diff options) Junio C Hamano
2018-11-30 8:57 ` Junio C Hamano
2018-11-30 9:24 ` Ævar Arnfjörð Bjarmason
2018-11-30 12:32 ` Johannes Schindelin
2018-11-30 9:31 ` Eric Sunshine
2018-12-03 13:27 ` Martin Ågren
2018-12-03 20:07 ` [PATCH v2] range-diff: always pass at least minimal diff options Martin Ågren
2018-12-03 21:21 ` [PATCH v3] " Eric Sunshine
2018-12-04 1:35 ` Junio C Hamano
2018-12-04 5:40 ` Martin Ågren
2018-11-30 9:58 ` [PATCH 2/2] format-patch: allow for independent diff & range-diff options Eric Sunshine
2018-11-26 7:35 ` [ANNOUNCE] Git v2.20.0-rc1 Junio C Hamano
2018-11-26 15:41 ` Elijah Newren
2018-11-27 0:40 ` Junio C Hamano
-- strict thread matches above, loose matches on Subject: below --
2018-11-19 2:54 Git Test Coverage Report (v2.20.0-rc0) Derrick Stolee
2018-11-19 15:40 ` Derrick Stolee
2018-11-19 16:21 ` Jeff King
2018-11-19 18:44 ` Jeff King
2018-11-19 19:00 ` Ben Peart
2018-11-19 21:06 ` Derrick Stolee
2018-11-20 11:34 ` Jeff King
2018-11-20 12:17 ` Derrick Stolee
2018-11-20 12:40 ` Jeff King
2018-11-19 18:33 ` Ævar Arnfjörð Bjarmason
2018-11-19 18:51 ` [PATCH] tests: add a special setup where rebase.useBuiltin is off (Re: Git Test Coverage Report (v2.20.0-rc0)) Jonathan Nieder
2018-11-19 21:03 ` Ævar Arnfjörð Bjarmason
2018-11-19 19:10 ` Git Test Coverage Report (v2.20.0-rc0) Derrick Stolee
2018-11-19 19:39 ` Ævar Arnfjörð Bjarmason
2018-11-19 19:44 ` Derrick Stolee
2018-11-19 21:31 ` Derrick Stolee
2018-11-20 20:43 ` Johannes Schindelin
2018-11-13 12:38 [PATCH 0/1] rebase: understand -C again, refactor Johannes Schindelin via GitGitGadget
2018-11-13 12:38 ` [PATCH 1/1] rebase: really just passthru the `git am` options Johannes Schindelin via GitGitGadget
2018-11-13 13:05 ` Junio C Hamano
2018-11-13 15:05 ` Phillip Wood
2018-11-13 19:21 ` Johannes Schindelin
2018-11-13 19:58 ` Phillip Wood
2018-11-13 21:50 ` rebase-in-C stability for 2.20 Ævar Arnfjörð Bjarmason
2018-11-14 0:07 ` Stefan Beller
2018-11-14 9:01 ` [PATCH 0/2] rebase.useBuiltin doc & test mode Ævar Arnfjörð Bjarmason
2018-11-14 14:07 ` Johannes Schindelin
2018-11-14 9:01 ` [PATCH 1/2] rebase doc: document rebase.useBuiltin Ævar Arnfjörð Bjarmason
2018-11-14 9:01 ` [PATCH 2/2] tests: add a special setup where rebase.useBuiltin is off Ævar Arnfjörð Bjarmason
2018-11-14 0:36 ` rebase-in-C stability for 2.20 Elijah Newren
2018-11-14 3:39 ` Junio C Hamano
2018-11-24 20:54 ` [ANNOUNCE] Git v2.20.0-rc1 Ævar Arnfjörð Bjarmason
2018-11-25 1:00 ` Junio C Hamano
2018-11-26 6:10 ` [PATCH] rebase: mark the C reimplementation as an experimental opt-in feature (was Re: [ANNOUNCE] Git v2.20.0-rc1) Junio C Hamano
2018-11-28 4:31 ` Jonathan Nieder
2018-11-28 9:23 ` Johannes Schindelin
2018-11-28 12:21 ` Ævar Arnfjörð Bjarmason
2018-11-29 4:58 ` Junio C Hamano
2018-11-29 14:17 ` Johannes Schindelin
2018-11-29 14:30 ` Ian Jackson
2018-11-29 15:39 ` Johannes Schindelin
2018-11-29 15:50 ` Ian Jackson
2018-11-29 16:14 ` Johannes Schindelin
2018-11-29 16:26 ` Ian Jackson
2018-11-26 22:52 ` [ANNOUNCE] Git v2.20.0-rc1 Johannes Schindelin
2018-11-26 23:47 ` Johannes Schindelin
2018-11-28 4:07 ` Junio C Hamano
2018-11-28 9:30 ` Johannes Schindelin
2018-11-14 14:22 ` [PATCH 1/1] rebase: really just passthru the `git am` options Johannes Schindelin
2018-11-14 7:29 ` [PATCH 0/1] rebase: understand -C again, refactor Jeff King
2018-11-14 14:28 ` Johannes Schindelin
2018-11-14 16:25 ` [PATCH v2 0/2] " Johannes Schindelin via GitGitGadget
2018-11-14 16:25 ` [PATCH v2 1/2] rebase: really just passthru the `git am` options Johannes Schindelin via GitGitGadget
2018-11-14 16:25 ` [PATCH v2 2/2] rebase: validate -C<n> and --whitespace=<mode> parameters early Johannes Schindelin via GitGitGadget
2018-11-14 16:37 ` Phillip Wood
2018-11-14 21:24 ` Johannes Schindelin
2018-11-19 12:38 ` Ævar Arnfjörð Bjarmason
2018-11-19 21:37 ` Git Test Coverage Report (v2.20.0-rc0) Ævar Arnfjörð Bjarmason
2018-11-20 10:58 ` [PATCH v2 2/2] rebase: validate -C<n> and --whitespace=<mode> parameters early Johannes Schindelin
2018-11-20 11:42 ` [PATCH] rebase: mark a test as failing with rebase.useBuiltin=false Ævar Arnfjörð Bjarmason
2018-11-20 19:55 ` Johannes Schindelin
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