diff mbox series

[v4,1/1] range-diff: treat notes like `log`

Message ID 244e102cc4693bb6291e03cffea6df05cdb29df3.1695144790.git.code@khaugsbakk.name (mailing list archive)
State Superseded
Headers show
Series range-diff: treat notes like `log` | expand

Commit Message

Kristoffer Haugsbakk Sept. 19, 2023, 6:05 p.m. UTC
Currently, `range-diff` shows the default notes if no notes-related
arguments are given. This is also how `log` behaves. But unlike
`range-diff`, `log` does *not* show the default notes if
`--notes=<custom>` are given. In other words, this:

    git log --notes=custom

is equivalent to this:

    git log --no-notes --notes=custom

While:

    git range-diff --notes=custom

acts like this:

    git log --notes --notes-custom

This can’t be how the user expects `range-diff` to behave given that the
man page for `range-diff` under `--[no-]notes[=<ref>]` says:

> This flag is passed to the `git log` program (see git-log(1)) that
> generates the patches.

This behavior also affects `format-patch` since it uses `range-diff` for
the cover letter. Unlike `log`, though, `format-patch` is not supposed
to show the default notes if no notes-related arguments are given.[1]
But this promise is broken when the range-diff happens to have something
to say about the changes to the default notes, since that will be shown
in the cover letter.

Remedy this by introducing `--show-notes-by-default` that `range-diff` can
use to tell the `log` subprocess what to do.

§ Root cause

8cf51561d1e (range-diff: fix a crash in parsing git-log output,
2020-04-15) added `--notes` in order to deal with a side-effect of
`--pretty=medium`:

> To fix this explicitly set the output format of the internally executed
> `git log` with `--pretty=medium`. Because that cancels `--notes`, add
> explicitly `--notes` at the end.

§ Authors

• Fix by Johannes
• Tests by Kristoffer

† 1: See e.g. 66b2ed09c2 (Fix "log" family not to be too agressive about
    showing notes, 2010-01-20).

Co-authored-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
---
 Documentation/pretty-options.txt |  4 ++++
 range-diff.c                     |  2 +-
 revision.c                       |  7 +++++++
 revision.h                       |  1 +
 t/t3206-range-diff.sh            | 28 ++++++++++++++++++++++++++++
 5 files changed, 41 insertions(+), 1 deletion(-)

Comments

Junio C Hamano Sept. 19, 2023, 7:27 p.m. UTC | #1
Kristoffer Haugsbakk <code@khaugsbakk.name> writes:

> Currently, `range-diff` shows the default notes if no notes-related
> arguments are given. This is also how `log` behaves. But unlike
> `range-diff`, `log` does *not* show the default notes if
> `--notes=<custom>` are given. In other words, this:
>
>     git log --notes=custom
>
> is equivalent to this:
>
>     git log --no-notes --notes=custom
>
> While:
>
>     git range-diff --notes=custom
>
> acts like this:
>
>     git log --notes --notes-custom
>
> This can’t be how the user expects `range-diff` to behave given that the
> man page for `range-diff` under `--[no-]notes[=<ref>]` says:
>
>> This flag is passed to the `git log` program (see git-log(1)) that
>> generates the patches.
>
> This behavior also affects `format-patch` since it uses `range-diff` for
> the cover letter. Unlike `log`, though, `format-patch` is not supposed
> to show the default notes if no notes-related arguments are given.[1]
> But this promise is broken when the range-diff happens to have something
> to say about the changes to the default notes, since that will be shown
> in the cover letter.
>
> Remedy this by introducing `--show-notes-by-default` that `range-diff` can
> use to tell the `log` subprocess what to do.

Very well described.  I think the rest of the proposed log message
is redundant now we have quite a good write-up above.

>  ifndef::git-rev-list[]
> +--show-notes-by-default::
> +	Show the default notes (see `--notes`) unless subsequent arguments
> +	are used to display specific notes.
> +
>  --notes[=<ref>]::
>  	Show the notes (see linkgit:git-notes[1]) that annotate the
>  	commit, when showing the commit log message.  This is the default

I think the new entry should come after the description of `--notes`,
which is the primary option around the "notes" feature.

In the description, I think "subsequent" is misphrased.  It makes it
sound as if

    $ git log --show-notes-by-default --notes=amlog

would stop showing the notes from the default notes tree (because
the notes from the .git/refs/notes/amlog is explicitly asked for),
while

    $ git log --notes=amlog --show-notes-by-default

would show both the default and the custom notes, which is not what
the code does, I think, in this hunk:

> @@ -3054,6 +3056,11 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
>  	if (revs->expand_tabs_in_log < 0)
>  		revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
>  
> +	if (!revs->show_notes_given && revs->show_notes_by_default) {
> +		enable_default_display_notes(&revs->notes_opt, &revs->show_notes);
> +		revs->show_notes_given = 1;
> +	}
> +
>  	return left;
>  }

Other than the above minor nits, looks very good.

Thanks.
Kristoffer Haugsbakk Sept. 19, 2023, 7:27 p.m. UTC | #2
The original CI failed.[1] Then I rebased on `master` (d4a83d07b8c (The
tenth batch, 2023-09-18)) which also failed.[2] Problem in t5559.

So: fair warning. :)

[1] https://github.com/LemmingAvalanche/git/actions/runs/6238806624
[2] https://github.com/LemmingAvalanche/git/actions/runs/6239585493
Junio C Hamano Sept. 19, 2023, 7:43 p.m. UTC | #3
"Kristoffer Haugsbakk" <code@khaugsbakk.name> writes:

> The original CI failed.[1] Then I rebased on `master` (d4a83d07b8c (The
> tenth batch, 2023-09-18)) which also failed.[2] Problem in t5559.
>
> So: fair warning. :)
>
> [1] https://github.com/LemmingAvalanche/git/actions/runs/6238806624
> [2] https://github.com/LemmingAvalanche/git/actions/runs/6239585493

I think you can ignore these macOS ones that spew

    == Info: [HTTP/2] [1] ...

in the log.  The adjustments necessary for the redaction code to
deal with these new messages from cURL are known and are cooking.
Kristoffer Haugsbakk Sept. 19, 2023, 7:44 p.m. UTC | #4
On Tue, Sep 19, 2023, at 21:27, Junio C Hamano wrote:
> Kristoffer Haugsbakk <code@khaugsbakk.name> writes:
>
>> [snip]
>
> Very well described.  I think the rest of the proposed log message
> is redundant now we have quite a good write-up above.

Thanks!

>
>>  ifndef::git-rev-list[]
>> +--show-notes-by-default::
>> +	Show the default notes (see `--notes`) unless subsequent arguments
>> +	are used to display specific notes.
>> +
>>  --notes[=<ref>]::
>>  	Show the notes (see linkgit:git-notes[1]) that annotate the
>>  	commit, when showing the commit log message.  This is the default
>
> I think the new entry should come after the description of `--notes`,
> which is the primary option around the "notes" feature.
>
> In the description, I think "subsequent" is misphrased.  It makes it
> sound as if
>
>     $ git log --show-notes-by-default --notes=amlog
>
> would stop showing the notes from the default notes tree (because
> the notes from the .git/refs/notes/amlog is explicitly asked for),
> while
>
>     $ git log --notes=amlog --show-notes-by-default
>
> would show both the default and the custom notes, which is not what
> the code does, I think, in this hunk:
>
>> @@ -3054,6 +3056,11 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
>>  	if (revs->expand_tabs_in_log < 0)
>>  		revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
>>
>> +	if (!revs->show_notes_given && revs->show_notes_by_default) {
>> +		enable_default_display_notes(&revs->notes_opt, &revs->show_notes);
>> +		revs->show_notes_given = 1;
>> +	}
>> +
>>  	return left;
>>  }
>
> Other than the above minor nits, looks very good.
>
> Thanks.

Okay I think I understand. With that in mind I would change it to the
patch below.

I can make a new version if that looks okay.

-- >8 --
diff --git a/Documentation/pretty-options.txt b/Documentation/pretty-options.txt
index dcd501ee505..d2df1aad647 100644
--- a/Documentation/pretty-options.txt
+++ b/Documentation/pretty-options.txt
@@ -59,10 +59,6 @@ message by 4 spaces (i.e.  'medium', which is the default, 'full',
 and 'fuller').
 
 ifndef::git-rev-list[]
---show-notes-by-default::
-	Show the default notes (see `--notes`) unless subsequent arguments
-	are used to display specific notes.
-
 --notes[=<ref>]::
 	Show the notes (see linkgit:git-notes[1]) that annotate the
 	commit, when showing the commit log message.  This is the default
@@ -91,6 +87,10 @@ being displayed. Examples: "--notes=foo" will show only notes from
 	"--notes --notes=foo --no-notes --notes=bar" will only show notes
 	from "refs/notes/bar".
 
+--show-notes-by-default::
+	Show the default notes unless arguments are given for displaying
+	specific notes.
+
 --show-notes[=<ref>]::
 --[no-]standard-notes::
 	These options are deprecated. Use the above --notes/--no-notes
Junio C Hamano Sept. 19, 2023, 7:51 p.m. UTC | #5
"Kristoffer Haugsbakk" <code@khaugsbakk.name> writes:

> Okay I think I understand. With that in mind I would change it to the
> patch below.
>
> I can make a new version if that looks okay.

Looking good, although I would say "unless other options are given"
("other" is optional) instead of "arguments" if I were writing this.

Thanks.
diff mbox series

Patch

diff --git a/Documentation/pretty-options.txt b/Documentation/pretty-options.txt
index dc685be363..dcd501ee50 100644
--- a/Documentation/pretty-options.txt
+++ b/Documentation/pretty-options.txt
@@ -59,6 +59,10 @@  message by 4 spaces (i.e.  'medium', which is the default, 'full',
 and 'fuller').
 
 ifndef::git-rev-list[]
+--show-notes-by-default::
+	Show the default notes (see `--notes`) unless subsequent arguments
+	are used to display specific notes.
+
 --notes[=<ref>]::
 	Show the notes (see linkgit:git-notes[1]) that annotate the
 	commit, when showing the commit log message.  This is the default
diff --git a/range-diff.c b/range-diff.c
index 2e86063491..56f6870ff9 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -60,7 +60,7 @@  static int read_patches(const char *range, struct string_list *list,
 		     "--output-indicator-context=#",
 		     "--no-abbrev-commit",
 		     "--pretty=medium",
-		     "--notes",
+		     "--show-notes-by-default",
 		     NULL);
 	strvec_push(&cp.args, range);
 	if (other_arg)
diff --git a/revision.c b/revision.c
index 2f4c53ea20..49d385257a 100644
--- a/revision.c
+++ b/revision.c
@@ -2484,6 +2484,8 @@  static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		revs->break_bar = xstrdup(optarg);
 		revs->track_linear = 1;
 		revs->track_first_time = 1;
+	} else if (!strcmp(arg, "--show-notes-by-default")) {
+		revs->show_notes_by_default = 1;
 	} else if (skip_prefix(arg, "--show-notes=", &optarg) ||
 		   skip_prefix(arg, "--notes=", &optarg)) {
 		if (starts_with(arg, "--show-notes=") &&
@@ -3054,6 +3056,11 @@  int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
 	if (revs->expand_tabs_in_log < 0)
 		revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
 
+	if (!revs->show_notes_given && revs->show_notes_by_default) {
+		enable_default_display_notes(&revs->notes_opt, &revs->show_notes);
+		revs->show_notes_given = 1;
+	}
+
 	return left;
 }
 
diff --git a/revision.h b/revision.h
index 82ab400139..50091bbd13 100644
--- a/revision.h
+++ b/revision.h
@@ -253,6 +253,7 @@  struct rev_info {
 			shown_dashes:1,
 			show_merge:1,
 			show_notes_given:1,
+			show_notes_by_default:1,
 			show_signature:1,
 			pretty_given:1,
 			abbrev_commit:1,
diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index b5f4d6a653..b33afa1c6a 100755
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -662,6 +662,20 @@  test_expect_success 'range-diff with multiple --notes' '
 	test_cmp expect actual
 '
 
+# `range-diff` should act like `log` with regards to notes
+test_expect_success 'range-diff with --notes=custom does not show default notes' '
+	git notes add -m "topic note" topic &&
+	git notes add -m "unmodified note" unmodified &&
+	git notes --ref=custom add -m "topic note" topic &&
+	git notes --ref=custom add -m "unmodified note" unmodified &&
+	test_when_finished git notes remove topic unmodified &&
+	test_when_finished git notes --ref=custom remove topic unmodified &&
+	git range-diff --notes=custom main..topic main..unmodified \
+		>actual &&
+	! grep "## Notes ##" actual &&
+	grep "## Notes (custom) ##" actual
+'
+
 test_expect_success 'format-patch --range-diff does not compare notes by default' '
 	git notes add -m "topic note" topic &&
 	git notes add -m "unmodified note" unmodified &&
@@ -679,6 +693,20 @@  test_expect_success 'format-patch --range-diff does not compare notes by default
 	! grep "note" 0000-*
 '
 
+test_expect_success 'format-patch --notes=custom --range-diff only compares custom notes' '
+	git notes add -m "topic note" topic &&
+	git notes --ref=custom add -m "topic note (custom)" topic &&
+	git notes add -m "unmodified note" unmodified &&
+	git notes --ref=custom add -m "unmodified note (custom)" unmodified &&
+	test_when_finished git notes remove topic unmodified &&
+	test_when_finished git notes --ref=custom remove topic unmodified &&
+	git format-patch --notes=custom --cover-letter --range-diff=$prev \
+		main..unmodified >actual &&
+	test_when_finished "rm 000?-*" &&
+	grep "## Notes (custom) ##" 0000-* &&
+	! grep "## Notes ##" 0000-*
+'
+
 test_expect_success 'format-patch --range-diff with --no-notes' '
 	git notes add -m "topic note" topic &&
 	git notes add -m "unmodified note" unmodified &&