I don't know lisp very well, and elisp not at all, but I can help you
with what command lines would give you the results you might want.
On Jul 11, 2007, at 7:39 AM, David Kastrup wrote:
(vc-git-previous-version FILE REV)
Return the version number immediately preceding REV for FILE,
or nil if there is no previous version.
If you want the last revision where the file was altered, you could
easily use
git rev-list -2 $current_rev -- $file | tail -1
The result would be a SHA-1 of the next commit where the file was
altered.
(vc-git-next-version FILE REV)
Return the version number immediately following REV for FILE,
or nil if there is no previous version.
This is a little more problematic as git doesn't have forward links
in it's history. If you have a ref to start with (HEAD is a good one
to use, if you don't have anything else) you could use a similar
command to the above
git rev-list $ref -- $file | grep -C1 -m1 $current_rev | head -1
If you don't have a ref to start from, you could use --all, but that
may not be what the user expects.
If you want a human readable name for either you could use name-rev.
(Add "| git name-rev --stdin" to the end of the above.) It places a
human readable name after the SHA-1 in parentheses. (example:
"54dadbdb29668fbd51effefd0a0c65d915f5422b (master~3)")
~~ Brian
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