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@sindresorhus
Last active October 12, 2022 20:47
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What would you like to do?
git hook to run a command after `git pull` if a specified file was changed.In this example it's used to run `npm install` if package.json changed and `bower install` if `bower.json` changed.Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.
#!/usr/bin/env bash
# MIT © Sindre Sorhus - sindresorhus.com
# git hook to run a command after `git pull` if a specified file was changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.
changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"
check_run() {
echo "$changed_files" | grep --quiet "$1" && eval "$2"
}
# Example usage
# In this example it's used to run `npm install` if package.json changed
check_run package.json "npm install"
@matthew-dean
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How do you run npm install if one of two matching criteria is found? e.g. I want to run npm install if one of two files is modified, but don't want to run npm install twice.

@ykrytsyn
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ykrytsyn commented May 1, 2019

You should be able to run it as
check_run "file1\|file2" "npm install"

Probably, I also need to add '-e' parameter to the 'grep' function

@paulolorenzobasilio
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Thanks!

@devinrhode2
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@vickeyCrafts
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vickeyCrafts commented Mar 22, 2020

is there any way to show message like this, before & after hooks execution for npm i?
checking for dependency update...

if there is any update going to happen
installing dependency..

if there is no changes to dependency
no new dependency!

@ajaykumar97
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This script works like a charm. Thanks for sharing.
Can someone please let me know what is happening inside the script? What does this script arguments mean?

@henaharon
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@ajaykumar97 can you help me implement it ? it looks like it is not running ;/

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