将命令应用于所有提交 [英] Apply a command to all commits

问题描述

为了收集有关Git存储库的一些统计信息，我正在寻找一种执行以下操作的方法:

In an attempt to gather some statistics about a Git repository, I'm looking for a way to do the following:

• 对于每个提交，执行一个命令(例如； du -h).
• 该命令应在提交后从存储库基本目录按其外观"运行.
• 理想情况下，该命令可以访问提交哈希和时间戳.

• For each commit, execute a command (ex; du -h).
• That command should run from the repository base directory "as it looked like" after the commit.
• The command would ideally have access to the commit hash and time stamp.

将以准Bash表示的一个应用程序将运行

One application, expressed in quasi-Bash, would be to run

echo $HASH $TIME `du -hs --exclude=".git" . | awk '{ print $1; }'` >> ../sizeovertime

通过所有提交了解存储库的增长.

on all commits to get an idea of the growth of the repository.

(以某种方式，感觉应该可以使用git filter-branch --tree-filter，但这对我来说似乎是一个可怕的技巧.)

(Somehow, it feels like it should be possible to use git filter-branch --tree-filter for this but that looks like a terrible hack to me.)

推荐答案

我不明白如何在不检查每个提交的情况下执行此操作，因此在大型存储库上将花费一些时间.

I don't see how you could do this without checking out each commit, so that is going to take a while on a large repository.

这是使用bash进行操作的方法:

Here's how you could go about it with bash:

#! /bin/bash

while read co dt ; do
    git checkout $co > /dev/null 2>&1
    size=$(du -hs --exclude=.git|cut -f1)
    echo $co $size $dt
done < <(git rev-list --pretty=format:"%H %ci" --all --date-order |grep -v "^commit")

警告:这将使您处于分离状态，处于最旧的提交状态，这不是一个好地方.

Warning: this will leave you in detached head state, on the oldest commit, which is not a nice place to be.

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