Re: How to `git blame` individual characters?
- From
Christian Couder <christian.couder@gmail.com>
- Date
- Mar 27, 2018, 06:01 UTC
- Message-ID
- <CAP8UFD3TPfWtpT8RLGBL2V+M+nkpGEYVa8Y_c68u4Lw4zPyW5g@mail.gmail.com>
- In-Reply-To
- <CAA6PgK7L04VoHT7A8M_mwq5kA+9BiQxrd6iPjPHOpa4=Z3futw@mail.gmail.com>
Hi,
On Tue, Mar 27, 2018 at 2:18 AM, Jan Keromnes <janx@linux.com> wrote:
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> Dear Git developers, > > I'd like to understand what would be required to run `git blame` on > individual characters instead of full lines. Could you please point me > in the right direction?
You might want to take a look at cregit (https://github.com/cregit/cregit) and maybe at other work from the people who developed it.
There are links related to this tool in: https://git.github.io/rev_news/2017/05/17/edition-27/
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> Someone asked a similar question about "Word-by-word blame/annotate"
> on StackOverflow a few years ago, and one of the replies said:
>
>> Git tracks changes snapshot by snapshot. The line-based format is calculated on-the-fly, and it would also be possible to have a word-based format.
>
> Source: https://stackoverflow.com/q/17758008/3461173
>
> This leaves me hopeful that a character-based format can somehow be
> achieved. Here is a fake example to illustrate what I'm looking for:
>
> $ cat myscript.js
> for (int foo = 0; foo <= 11; foo++) { console.log(foo); }
> $ git blame --character-based --pseudo-json myscript.js
> [
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": "for (int " },
> { "commit": "bcd1234a", "summary": "Rename iterator",
> "characters": "foo" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": " = 0; " },
> { "commit": "bcd1234a", "summary": "Rename iterator",
> "characters": "foo" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": " <= " },
> { "commit": "cd1234ab", "summary": "Go up to 11",
> "characters": "11" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": "; " },
> { "commit": "bcd1234a", "summary": "Rename iterator",
> "characters": "foo" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": "++) { console.log(" },
> { "commit": "bcd1234a", "summary": "Rename iterator",
> "characters": "foo" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": ")" },
> { "commit": "d1234abc", "summary": "Add missing
> semicolon", "characters": ";" },
> { "commit": "abcd1234", "summary": "Implement loop",
> "characters": " }" }
> ]
>
> What would be the most direct way to achieve such a character-based
> blame/annotate? Should I write some sort of Git extension, or hack
> into Git's source code?I think the "Token-based authorship information from Git" article (https://lwn.net/Articles/698425/) is about that.
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> E.g. I looked for an option in `git-blame` or `git-annotate` to change > the "next line boundary" from "carret return" (line-based blame) to > "any whitespace" (word-based blame) or "character-by-character" > (character-based blame), but I didn't find it. Could this be > implemented in `blame.c`? If so, which methods would need tweaking?
I don't think this is implemented in Git. Do you really need that in git itself?