如何从'git filter-branch'获取旧>新重写的提交SHA列表? [英] How do I get a list of old->new rewritten commit SHAs from 'git filter-branch'?
问题描述
在运行 git filter-branch
后,如何获得由filter-branch重写的新提交SHA的旧提交SHA列表?
例如,类似于以下内容:
b19fd985746c1f060f761d42d353e387bec243fb - > c8ab40ef9bae3b58642a8d1e5b90720d093a60b5
c5ebba1eeb92ca76c0effa32de14178ec7f07db6 - > 4d5a9958b98dbcfa47ce1354bb2af4cc77904639
705f71543235b872ca3e1067538e36d14044429d - > d2aafbd6e5b91955b62dee34f4a0abf0171ba016
其中左列是原始SHA列表,右列是新的SHA之后被过滤器分支重写。
我看到页面提到了一个 map
函数,但我不明白这在这里是否有用,或者如果是的话,如何使用它。
感谢您的帮助!
我不得不围绕 git-filter-branch
的源代码来解决这个问题。它没有记录(据我所知),但旧的提交ID显式导出为 $ GIT_COMMIT
。这工作对我来说:
$ $ p $ $ git过滤器分支 - 您的过滤器在这里--commit过滤器'回声-n $ {GIT_COMMIT},>> / tmp / log; git commit-tree$ @|三通-a / tmp目录/日志你的分支,这里
[...]
$猫的/ tmp /日志
70d609ba7bc58bb196a2351ba26afc5db0964ca6,d9071b49743701c7be971f76ddc84e76554516c7
0d1146dcabc00c45fb9be7fe923c955f7b6deb50,cb6813f9aca5e5f26fcc85007c5bb71552b91017
[...]
(该文件的格式
After running git filter-branch
, how do I get a list of old commit SHAs as rewritten by filter-branch to their new corresponding commit SHAs?
For example, something similar to:
b19fd985746c1f060f761d42d353e387bec243fb -> c8ab40ef9bae3b58642a8d1e5b90720d093a60b5
c5ebba1eeb92ca76c0effa32de14178ec7f07db6 -> 4d5a9958b98dbcfa47ce1354bb2af4cc77904639
705f71543235b872ca3e1067538e36d14044429d -> d2aafbd6e5b91955b62dee34f4a0abf0171ba016
Where the left column is the list of original SHAs, and the right column are the new SHAs after being rewritten by filter-branch.
I see that the man page for filter-branch mentions a map
function, but I don't understand whether that's useful here, or if it is, how to use it.
Thanks for your help!
I had to go poking around the source for git-filter-branch
to work this one out. It's not documented (as far as I can tell), but the old commit ID is explicitly exported as $GIT_COMMIT
. This worked for me:
$ git filter-branch --your-filters-here --commit-filter 'echo -n "${GIT_COMMIT}," >>/tmp/log; git commit-tree "$@" | tee -a /tmp/log' your-branch-here
[...]
$ cat /tmp/log
70d609ba7bc58bb196a2351ba26afc5db0964ca6,d9071b49743701c7be971f76ddc84e76554516c7
0d1146dcabc00c45fb9be7fe923c955f7b6deb50,cb6813f9aca5e5f26fcc85007c5bb71552b91017
[...]
(That file, of course, has the format <original commit hash>,<new commit hash>
.)
I'm kind of curious what your intentions are with using this though. It doesn't seem like information you'd need to typically know if you're using filter-branch the "right" way (i.e., not manipulating existing published history).
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