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参考文章：详解如何在项目中使用git Hooks（husky、yorkie）

git hooks钩子

git hooks是一些自定义的脚本，用于控制git工作的流程，分为客户端钩子和服务端钩子。

 ~/work/step-time/ [master+*] ll .git/hooks 
total 128
-rwxr-xr-x  1 admin  staff   478B  8 19 18:52 applypatch-msg.sample
-rwxr-xr-x  1 admin  staff   896B  8 19 18:52 commit-msg.sample
-rwxr-xr-x  1 admin  staff   4.5K  8 19 18:52 fsmonitor-watchman.sample
-rwxr-xr-x  1 admin  staff   189B  8 19 18:52 post-update.sample
-rwxr-xr-x  1 admin  staff   424B  8 19 18:52 pre-applypatch.sample
-rwxr-xr-x  1 admin  staff   1.6K 11 12 17:42 pre-commit
-rwxr-xr-x  1 admin  staff   1.6K 11 12 17:00 pre-commit.sample.bck
-rwxr-xr-x  1 admin  staff   416B  8 19 18:52 pre-merge-commit.sample
-rwxr-xr-x  1 admin  staff   1.3K  8 19 18:52 pre-push.sample
-rwxr-xr-x  1 admin  staff   4.8K  8 19 18:52 pre-rebase.sample
-rwxr-xr-x  1 admin  staff   544B  8 19 18:52 pre-receive.sample
-rwxr-xr-x  1 admin  staff   1.5K  8 19 18:52 prepare-commit-msg.sample
-rwxr-xr-x  1 admin  staff   2.7K  8 19 18:52 push-to-checkout.sample
-rwxr-xr-x  1 admin  staff   3.6K  8 19 18:52 update.sample
 ~/work/step-time/ [master+*] 
 ~/work/step-time/ [master+*] 
 ~/work/step-time/ [master+*] 

在.git.hooks目录下的就是勾子，想要运行她们只需要去除.sample后缀，并且把文件改成可执行的就可以了。

pre-commit.sample介绍

#!/bin/sh
#
# An example hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# To enable this hook, rename this file to "pre-commit".# 获取提交的文件名
if git rev-parse --verify HEAD >/dev/null 2>&1
thenagainst=HEAD
else# Initial commit: diff against an empty tree objectagainst=$(git hash-object -t tree /dev/null)
fi# If you want to allow non-ASCII filenames set this variable to true.
allownonascii=$(git config --type=bool hooks.allownonascii)# Redirect output to stderr.
exec 1>&2# Cross platform projects tend to avoid non-ASCII filenames; prevent
# them from being added to the repository. We exploit the fact that the
# printable range starts at the space character and ends with tilde.
if [ "$allownonascii" != "true" ] &&# Note that the use of brackets around a tr range is ok here, (it's# even required, for portability to Solaris 10's /usr/bin/tr), since# the square bracket bytes happen to fall in the designated range.## 获取改动的文件名，使用tr删除ascii表的0到126的字符，## 也就是计算non-ASCII 的字符数量test $(git diff --cached --name-only --diff-filter=A -z $against |LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
thencat <<\EOF
Error: Attempt to add a non-ASCII file name.This can cause problems if you want to work with people on other platforms.To be portable it is advisable to rename the file.If you know what you are doing you can disable this check using:git config hooks.allownonascii true
EOFexit 1
fi# If there are whitespace errors, print the offending file names and fail.
exec git diff-index --check --cached $against --