From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Siddharth Asthana <siddharthasthana31@gmail.com>
Cc: git@vger.kernel.org, phillip.wood123@gmail.com,
congdanhqx@gmail.com, christian.couder@gmail.com,
gitster@pobox.com, Johannes.Schindelin@gmx.de,
johncai86@gmail.com
Subject: Re: [PATCH v4 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header()
Date: Wed, 13 Jul 2022 03:25:40 +0200 [thread overview]
Message-ID: <220713.86ilo14wqq.gmgdl@evledraar.gmail.com> (raw)
In-Reply-To: <20220712160634.213956-4-siddharthasthana31@gmail.com>
On Tue, Jul 12 2022, Siddharth Asthana wrote:
> commit_rewrite_person() takes a commit buffer and replaces the idents
> in the header with their canonical versions using the mailmap mechanism.
> The name "commit_rewrite_person()" is misleading as it doesn't convey
> what kind of rewrite are we going to do to the buffer. It also doesn't
> clearly mention that the function will limit itself to the header part
> of the buffer. The new name, "apply_mailmap_to_header()", expresses the
> functionality of the function pretty clearly.
>
> We intend to use apply_mailmap_to_header() in git-cat-file to replace
> idents in the headers of commit and tag object buffers. So, we will be
> extending this function to take tag objects buffer as well and replace
> idents on the tagger header using the mailmap mechanism.
>
> Mentored-by: Christian Couder <christian.couder@gmail.com>
> Mentored-by: John Cai <johncai86@gmail.com>
> Signed-off-by: Siddharth Asthana <siddharthasthana31@gmail.com>
> ---
> cache.h | 6 +++---
> ident.c | 2 +-
> revision.c | 2 +-
> 3 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/cache.h b/cache.h
> index c9dbe1c29a..9edb7fefd3 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -1689,10 +1689,10 @@ struct ident_split {
> int split_ident_line(struct ident_split *, const char *, int);
>
> /*
> - * Given a commit object buffer and the commit headers, replaces the idents
> - * in the headers with their canonical versions using the mailmap mechanism.
> + * Given a commit or tag object buffer and the commit or tag headers, replaces
> + * the idents in the headers with their canonical versions using the mailmap mechanism.
> */
> -void commit_rewrite_person(struct strbuf *buf, const char **commit_headers, struct string_list *mailmap);
> +void apply_mailmap_to_header(struct strbuf *buf, const char **headers, struct string_list *mailmap);
>
> /*
> * Compare split idents for equality or strict ordering. Note that we
> diff --git a/ident.c b/ident.c
> index 9f4f6e9071..5f17bd607d 100644
> --- a/ident.c
> +++ b/ident.c
> @@ -393,7 +393,7 @@ static ssize_t rewrite_ident_line(const char* person, struct strbuf *buf, struct
> return 0;
> }
>
> -void commit_rewrite_person(struct strbuf *buf, const char **headers, struct string_list *mailmap)
> +void apply_mailmap_to_header(struct strbuf *buf, const char **headers, struct string_list *mailmap)
> {
> size_t buf_offset = 0;
>
> diff --git a/revision.c b/revision.c
> index 14dca903b6..6ad3665204 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -3792,7 +3792,7 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
> if (!buf.len)
> strbuf_addstr(&buf, message);
>
> - commit_rewrite_person(&buf, commit_headers, opt->mailmap);
> + apply_mailmap_to_header(&buf, commit_headers, opt->mailmap);
> }
>
> /* Append "fake" message parts as needed */
I can live with this so far, but I really think this is cementing the
wrong approach into place here.
We only use commit_match() to feed a commit to grep.c, which if you look
at the "header_field" struct there we take this pre-formatted output and
parse this out *again*, i.e. find "author", "reflog", "committer" etc.,
and eventually point the regex engine at that buffer.
So we really don't need to get a strbuf here, and munge the whole thing
in place to feed it to grep.c, instead we can:
1. Not munge it at all, pass it as-is
2. Pass the mailmap along to grep.c itself
3. It's already parsing out the headers, so at some point it will have
"author foo <bar>\n"
4. In that code, we can just consult the mailmap, and then map the "foo
<bar>" bart to "Baz <bar>" or whatever
5. Thean search that string.
So no need for any in-place rewriting, or no?
Even with this approach this seems a bit odd, e.g. isn't your
commit_rewrite_person() largely a re-invention of find_commit_header()
in commit.c, can't we use that function there?
The replace_idents_using_mailmap() in 4/4 seems like it could be
improved in a similar way.
I.e. can't we just loop over the the object, then as we find "author"
consult the mailmap, and potentially emit a replacement, otherwise the
existing content as-is up until the next \n etc.
We should be able to "stream" all of this, instead of in-place modifying
a potentially large commit buffer, which involves memmove() etc.
next prev parent reply other threads:[~2022-07-13 1:39 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-30 14:24 [PATCH 0/3] Add support for mailmap in cat-file Siddharth Asthana
2022-06-30 14:24 ` [PATCH 1/3] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-06-30 16:00 ` Đoàn Trần Công Danh
2022-06-30 23:22 ` Junio C Hamano
2022-06-30 14:24 ` [PATCH 2/3] ident: rename commit_rewrite_person() to rewrite_ident_line() Siddharth Asthana
2022-06-30 15:33 ` Phillip Wood
2022-06-30 16:55 ` Christian Couder
2022-06-30 23:31 ` Junio C Hamano
2022-06-30 14:24 ` [PATCH 3/3] cat-file: add mailmap support Siddharth Asthana
2022-06-30 15:50 ` Phillip Wood
2022-06-30 16:36 ` Phillip Wood
2022-06-30 17:07 ` Christian Couder
2022-06-30 21:33 ` Junio C Hamano
2022-07-07 9:15 ` Christian Couder
2022-06-30 23:36 ` Ævar Arnfjörð Bjarmason
2022-06-30 23:53 ` Junio C Hamano
2022-07-07 9:02 ` Christian Couder
2022-06-30 23:41 ` Junio C Hamano
2022-06-30 21:18 ` [PATCH 0/3] Add support for mailmap in cat-file Junio C Hamano
2022-07-07 16:15 ` [PATCH v2 0/4] " Siddharth Asthana
2022-07-07 16:15 ` [PATCH v2 1/4] revision: improve commit_rewrite_person() Siddharth Asthana
2022-07-07 21:52 ` Junio C Hamano
2022-07-08 14:50 ` Đoàn Trần Công Danh
[not found] ` <CAP8UFD116xMnp27pxW8WNDf6PRJxnnwWtcy2TNHU_KyV2ZVA1g@mail.gmail.com>
2022-07-09 1:02 ` Đoàn Trần Công Danh
2022-07-09 5:04 ` Christian Couder
2022-07-07 16:15 ` [PATCH v2 2/4] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-07-07 16:15 ` [PATCH v2 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header() Siddharth Asthana
2022-07-07 16:15 ` [PATCH v2 4/4] cat-file: add mailmap support Siddharth Asthana
2022-07-07 21:55 ` Junio C Hamano
2022-07-08 11:53 ` Johannes Schindelin
2022-07-07 22:06 ` [PATCH v2 0/4] Add support for mailmap in cat-file Junio C Hamano
2022-07-07 22:58 ` Junio C Hamano
2022-07-09 15:41 ` [PATCH v3 " Siddharth Asthana
2022-07-09 15:41 ` [PATCH v3 1/4] revision: improve commit_rewrite_person() Siddharth Asthana
2022-07-12 16:29 ` Johannes Schindelin
2022-07-09 15:41 ` [PATCH v3 2/4] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-07-09 15:41 ` [PATCH v3 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header() Siddharth Asthana
2022-07-09 15:41 ` [PATCH v3 4/4] cat-file: add mailmap support Siddharth Asthana
2022-07-10 5:34 ` [PATCH v3 0/4] Add support for mailmap in cat-file Junio C Hamano
2022-07-12 12:34 ` Johannes Schindelin
2022-07-12 14:16 ` Junio C Hamano
2022-07-12 16:01 ` Siddharth Asthana
2022-07-12 16:06 ` Junio C Hamano
2022-07-12 16:06 ` [PATCH v4 " Siddharth Asthana
2022-07-12 16:06 ` [PATCH v4 1/4] revision: improve commit_rewrite_person() Siddharth Asthana
2022-07-13 1:25 ` Ævar Arnfjörð Bjarmason
2022-07-13 12:18 ` Christian Couder
2022-07-14 21:02 ` Junio C Hamano
2022-07-12 16:06 ` [PATCH v4 2/4] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-07-12 16:06 ` [PATCH v4 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header() Siddharth Asthana
2022-07-13 1:25 ` Ævar Arnfjörð Bjarmason [this message]
2022-07-13 13:29 ` Christian Couder
2022-07-12 16:06 ` [PATCH v4 4/4] cat-file: add mailmap support Siddharth Asthana
2022-07-16 7:40 ` [PATCH v5 0/4] Add support for mailmap in cat-file Siddharth Asthana
2022-07-16 7:40 ` [PATCH v5 1/4] revision: improve commit_rewrite_person() Siddharth Asthana
2022-07-17 22:11 ` Junio C Hamano
2022-07-16 7:40 ` [PATCH v5 2/4] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-07-16 7:40 ` [PATCH v5 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header() Siddharth Asthana
2022-07-16 7:40 ` [PATCH v5 4/4] cat-file: add mailmap support Siddharth Asthana
2022-07-18 19:50 ` [PATCH v6 0/4] Add support for mailmap in cat-file Siddharth Asthana
2022-07-18 19:50 ` [PATCH v6 1/4] revision: improve commit_rewrite_person() Siddharth Asthana
2022-07-18 19:51 ` [PATCH v6 2/4] ident: move commit_rewrite_person() to ident.c Siddharth Asthana
2022-07-18 19:51 ` [PATCH v6 3/4] ident: rename commit_rewrite_person() to apply_mailmap_to_header() Siddharth Asthana
2022-07-18 19:51 ` [PATCH v6 4/4] cat-file: add mailmap support Siddharth Asthana
2022-07-25 18:58 ` [PATCH v6 0/4] Add support for mailmap in cat-file Junio C Hamano
2022-07-28 19:07 ` Christian Couder
2022-07-28 19:32 ` Junio C Hamano
2022-07-30 7:50 ` Siddharth Asthana
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=220713.86ilo14wqq.gmgdl@evledraar.gmail.com \
--to=avarab@gmail.com \
--cc=Johannes.Schindelin@gmx.de \
--cc=christian.couder@gmail.com \
--cc=congdanhqx@gmail.com \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
--cc=johncai86@gmail.com \
--cc=phillip.wood123@gmail.com \
--cc=siddharthasthana31@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).