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Git Hook PrePush protection for force pushing
#!/bin/sh
# Called by "git push" after it has checked the remote status,
# but before anything has been pushed.
#
# If this script exits with a non-zero status nothing will be pushed.
#
# Steps to install, from the root directory of your repo...
# 1. git config --global init.templatedir '~/.git-templates'
# 2. mkdir -p ~/.git-templates/hooks
# 3. Copy this file into your repo at `~/.git-templates/hooks/pre-push`
# 4. Set executable, run `chmod a+x ~/.git-templates/hooks/pre-push`
# 5. Reinitialize repo `git init` (already defined hooks won't be overwrriten)
#
# Try a force push to master, you should get a message `*** [Policy] never force push...`
#
# The commands below will not be allowed...
# `git push --force origin master`
# `git push --delete origin master`
# `git push origin :master`
#
# Nor will a force push while on the master branch be allowed...
# `git co master`
# `git push --force origin`
#
# Requires git 1.8.2 or newer
#
# Git 1.8.2 release notes cover the new pre-push hook:
# <https://github.com/git/git/blob/master/Documentation/RelNotes/1.8.2.txt>
#
# See Sample pre-push script:
# <https://github.com/git/git/blob/87c86dd14abe8db7d00b0df5661ef8cf147a72a3/templates/hooks--pre-push.sample>
protected_branch='master'
policy='[Policy] Never force push or delete the '$protected_branch' branch! (Prevented with pre-push hook.)'
current_branch=$(git symbolic-ref HEAD | sed -e 's,.*/\(.*\),\1,')
push_command=$(ps -ocommand= -p $PPID)
is_destructive='force|delete|\-f'
will_remove_protected_branch=':'$protected_branch
do_exit(){
echo $policy
exit 1
}
if [[ $push_command =~ $is_destructive ]] && [ $current_branch = $protected_branch ]; then
do_exit
fi
if [[ $push_command =~ $is_destructive ]] && [[ $push_command =~ $protected_branch ]]; then
do_exit
fi
if [[ $push_command =~ $will_remove_protected_branch ]]; then
do_exit
fi
unset do_exit
exit 0
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