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#!/bin/sh
# This is a git pre-push hook script.
# It limits what you can push toward https://github.com/erlang/otp.git
#
# To activate, make a copy as .git/hooks/pre-push in your repo.
# 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.
#
# This hook is called with the following parameters:
#
# $1 -- Name of the remote to which the push is being done
# $2 -- URL to which the push is being done
#
# If pushing without using a named remote those arguments will be equal.
#
# Information about the commits which are being pushed is supplied as lines to
# the standard input in the form:
#
# <local ref> <local sha1> <remote ref> <remote sha1>
#
RELEASES="21 20 19 18 17 r16 r15 r14 r13"
# First commit on master, not allowed in other branches
MASTER_ONLY=aea2a053e28a11497796879715be29ab0c3cd1a0
# Number of commits and files allowed in one push by this script
NCOMMITS_MAX=100
NFILES_MAX=100
remote="$1"
url="$2"
null=0000000000000000000000000000000000000000
#echo "pre-push hook: remote=$remote"
#echo "pre-push hook: url=$url"
if [ "$url" = 'https://github.com/erlang/otp.git' -o "$url" = '[email protected]:erlang/otp.git' ]
then
if [ $remote = "$url" ]; then
echo "$0 says:"
echo "***"
echo "*** Push to $url without using a named remote is NOT ALLOWED!!!!"
echo "***"
exit 1
fi
IFS=' '
while read local_ref local_sha remote_ref remote_sha
do
#echo "pre-push hook: local_ref=$local_ref"
#echo "pre-push hook: remote_ref=$remote_ref"
#echo "pre-push hook: local_sha=$local_sha"
#echo "pre-push hook: remote_sha=$remote_sha"
if [ "$local_sha" = $null ]
then
echo "$0 says:"
echo "***"
echo "*** DELETE push to '$remote' NOT ALLOWED!!!!!"
echo "***"
exit 1
fi
if [ "$local_ref" != "$remote_ref" ]
then
echo "$0 says:"
echo "***"
echo "*** RENAME push: $local_ref pushed as $remote_ref to '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
fi
case "$remote_ref" in
refs/heads/master | refs/heads/maint | refs/heads/maint-[0-9][0-9] | refs/heads/maint-r[0-9][0-9])
branch=${remote_ref#refs/heads/}
if [ "$remote_sha" = $null ]
then
echo "$0 says:"
echo "***"
echo "*** UNKNOWN BRANCH: '$branch' does not exist at '$remote'!!!!"
echo "***"
exit 1
fi
if ! git log -1 --oneline $remote_sha > /dev/null 2>&1
then
echo "$0 says:"
echo "***"
echo "*** The top of '$branch' at '$remote' ($remote_sha)"
echo "*** does not exist locally!!!"
echo "*** You probably need to refresh local '$branch' and redo merge."
echo "***"
exit 1
fi
if ! git merge-base --is-ancestor $remote_sha $local_sha
then
echo "$0 says:"
echo "***"
echo "*** FORCE push branch to '$remote' NOT ALLOWED!!!"
echo "***"
exit 1
fi
if [ $remote_ref != refs/heads/master -a "$MASTER_ONLY" ] && git merge-base --is-ancestor $MASTER_ONLY $local_sha
then
echo "$0 says:"
echo "***"
echo "*** INVALID MERGE: Commit $MASTER_ONLY should not be reachable from '$branch'!!!!"
echo "*** You have probably merged master into '$branch' by mistake"
echo "***"
exit 1
fi
if [ ${remote_ref#refs/heads/maint-} != $remote_ref ] && git merge-base --is-ancestor refs/remotes/$remote/maint $local_sha
then
echo "$0 says:"
echo "***"
echo "*** INVALID MERGE: Branch maint should not be reachable from '$branch'!!!!"
echo "*** You have probably merged maint into '$branch' by mistake."
echo "***"
exit 1
fi
if [ $remote_ref = refs/heads/maint -o $remote_ref = refs/heads/master ]; then
for x in $RELEASES; do
if ! git merge-base --is-ancestor refs/remotes/$remote/maint-$x $local_sha; then
echo "$0 says:"
echo "***"
echo "*** WARNING: Branch '$remote/maint-$x' is not reachable from '$branch'!!!!"
echo "*** Someone needs to merge 'maint-$x' forward and push."
echo "***"
fi
done
fi
if [ $remote_ref = refs/heads/master ] && ! git merge-base --is-ancestor refs/remotes/$remote/maint $local_sha
then
echo "$0 says:"
echo "***"
echo "*** INVALID PUSH: Branch '$remote/maint' is not reachable from master!!!!"
echo "*** Someone needs to merge maint forward to master and push."
echo "***"
exit 1
fi
NCOMMITS=`git rev-list --count $remote_sha..$local_sha`
if [ $NCOMMITS -gt $NCOMMITS_MAX ]
then
echo "$0 says:"
echo "***"
echo "*** HUGE push: $NCOMMITS commits (> $NCOMMITS_MAX) to '$branch' at '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
fi
NFILES=`git diff --name-only $remote_sha $local_sha | wc --lines`
if [ $NFILES -gt $NFILES_MAX ]
then
echo "$0 says:"
echo "***"
echo "*** HUGE push: $NFILES changed files (> $NFILES_MAX) to '$branch' at '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
fi
;;
refs/tags/OTP-21.* | refs/tags/OTP-20.* | refs/tags/OTP-19.* | refs/tags/OTP-18.* | refs/tags/OTP-17.*)
tag=${remote_ref#refs/tags/}
if [ "$remote_sha" != $null ]
then
echo "$0 says:"
echo "***"
echo "*** FORCE push tag to '$remote' NOT ALLOWED!!!"
echo "*** Tag '$tag' already exists at '$remote'."
echo "***"
exit 1
fi
;;
refs/heads/*)
branch=${remote_ref#refs/heads/}
echo "$0 says:"
echo "***"
echo "*** UNKNOWN branch name: '$branch' pushed to '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
;;
refs/tags/*)
tag=${remote_ref#refs/tags/}
echo "$0 says:"
echo "***"
echo "*** UNKNOWN tag name: '$tag' pushed to '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
;;
*)
echo "$0 says:"
echo "***"
echo "*** STRANGE ref: '$remote_ref' pushed to '$remote' NOT ALLOWED!!!!"
echo "***"
exit 1
;;
esac
done
else
echo "$0: No checks done for remote '$remote' at $url."
fi
exit 0
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