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Staging/unstaging/reverting (parts of) the current buffer's file can
be a common use case.
Today "git apply" can do that based on a selection within a diff.
When the selection is on uncommitted content, we can probably assume
that the intent is to use the part of the selection that overlaps
with the +-side of "git diff" (or "git diff --cached" for
"git apply --cached").
Make "git apply" treat selections as content if the buffile is
tracked by Git. This differentiator is not perfect but I don't know
why anyone would want to use the existing "git apply" semantics on
a tracked file. Maybe we should pick a different name.
This feature couples well with "git show-diff", which shows all
lines with unstaged changes (in future it should probably show staged
changes as well).
Whereas on diffs, "git apply" stages the entire hunk if the selection
contains no newline, this does not happen when operating on content.
I didn't yet try implementing that. I guess the hunks are not as
explicit here.
Closes #5225
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A following patch wants to use this script without wrapping it in an
"evaluate-commands -save-regs e %{ ... }", so simply print the raw
error message and set the register to the caller.
This interface is a bit weird because the error is printed quoted
but for now that just makes things a bit more convenient.
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Our ":git blame" annotates each line with the most recent commit.
However often a line has been modified by several commits.
Introduce ":git blame-jump" which shows the commit that added the
line at cursor. Crucially, it works also in Git diff buffers, so it
can be used recursively to find the full history of a line.
To do the recursive blame from a diff, I need to navigate to the
old (deleted) version of a line. Since old and new line are usually
neighbors. Speed up the common scenario of finding the old version
by making ":git blame-jump" jump to the new version. This means the
initial diff view might not include the commit message etc. Compensate
this by showing the commit's date+author+subject in the status line.
Here are some test cases.
- run blame-jump after "git blame"
- create an uncommitted or unsaved line, run "git blame" and
"blame-jump" on the uncommitted line
- run blame-jump without running "git blame"
- run blame-jump in "git show"
- run blame-jump in "git diff HEAD"
- run blame-jump in "git diff --cached"
- run blame-jump in "git diff" (YMMV if there are cached changes,
could fix that)
Naming: there are some similar commands in the wild [1];
they are usually called "show-blamed" or similar, but they
don't jump to the corresponding line. Also our list of git
commands is getting a bit messy (especially the undocumented
show-diff/hide-diff/next-hunk/prev-hunk; subject first naming seems
better).
[1]: https://github.com/robertmeta/kak/blob/f6e78ec4c0eeccd091e6275828234d98e6aa3a7f/kakrc#L423
Future work: to go back to the previously-blamed commit we need to
have had the foresight to use "rename-buffer". Perhaps we want to
add some kind of buffer stack (like Magit does for example).
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Most diff consumers we've written only care about the "final" state
after parsing through a diff. Let's extract the diff parsing part,
for reuse in several new commands.
In future we should try to use this (or better, a diff-parsing library)
for patch-range.pl. We'd add a callback argument that is invoked once
perl hunk (or line). Unfortunately I haven't found that library for
Perl yet.
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