How to setup server side pre-receive hook?

Question

I am new to git hooks and server side git functionality. I worked on client side git to commit and push my code and we do git merge using Application Lifecycle management(ALM) tools. I am trying to write git hooks to do some testing on new/modified files in the repository. I am able to write and test client side hooks like pre-commit

Now, I need to add some server side git hook to verify files before merging to master because there is a change to skip client side verification using -no-verify option. When I go through some git hook tutorials, pre-push hook is the server side hook. I tried to create pre-push hook and it is working on client side. Now, How can make it as a server side hook and force to verify files when user try to push changes even with --no-verify option(should not be controled on client).

My big question is how server hook is triggered when we do git push from local branch/repo.

Creation of hook:

Created a hook called pre-commit and placed it under some folder git_hooks/pre-push and also in .git/hooks/pre-push. Now, created a symbolic link for my pre-push script. So, whenever I do git push it will trigger .git/hooks/pre-push which is a symbolic link for my script git_hooks/pre-push

EDIT:

I thought pre-push and pre-receive hooks are same as both are triggered on git push command but pre-push is working only client side, pre-recieve is working on server side. I created pre-receive hook and pushed it to master branch. Now, when I do git push getting this error: cannot spawn hooks/pre-receive: No such file or directory.

I am trying this on both Windows and Linux platforms. On Windows I am getting this error, On Linux it is not even getting triggered. I placed pre-receive hook on master branch on both the platforms.

Answer 1

You should look into Server side hooks documentation section.

There are three hooks that let you react to different stages of the git push process.

• pre-receive
• update
• post-receive

When you push to server pre-receive hook is triggered. Then for each branch you have pushed the update hook is triggered. When these hooks are finished without errors your patches are applied and post-receive hook is triggered

More detailed DOC about pre-receive hook:

This hook is invoked by git-receive-pack when it reacts to git push and updates reference(s) in its repository. Just before starting to update refs on the remote repository, the pre-receive hook is invoked. Its exit status determines the success or failure of the update.

UPD

To setup pre-receive server side hook you should place script into .git/hooks directory on the server. and name it pre-receive. That is all.
You should not create hooks directory at your repo and commit it. The pre-receive script is outside of repo

UPD
Here is example script:

#!/bin/bash


# check each branch being pushed

echo "pre-receive HOOK"

while read old_sha new_sha refname
do

if git diff "$old_sha" "$new_sha" | grep -qE '^\+(<<<<<<<|>>>>>>>)'; then
    echo "Saw a conflict marker in $(basename "$refname")."
    git diff "$old_sha" "$new_sha" | grep -nE '^\+(<<<<<<<|>>>>>>>)'
    exit 1
fi

if git diff "$old_sha" "$new_sha" | grep -qE '^\+.*\s+$'; then
    echo "Saw whitespaces at EOL."
    git diff "$old_sha" "$new_sha" | grep -nE '^\+.*\s+$'
    exit 1
fi

done

exit 0