pre-receive

#!/bin/bash
: '
Convenient hook to check the incoming changes to satisfy for flake8, flake8-docstrings, and mypy.
All diff changes are copied to tmp directory and checked there.
Also sets permissions to push to master branch only for specified server users.

Fill in git_masters array with your receive server users.
Require tox.ini file(may be empty). Set path to it from project HEAD in PATH_TO_TOX.
'
declare -A git_masters
git_masters['john_doe']=1
git_masters['josh_smith']=1
protected_branch='refs/heads/master'

PATH_TO_TOX = 'my_project/'
COMMAND='flake8'
MYPY_COMMAND='mypy --ignore-missing'
TEMPDIR=`mktemp -d`

function linter_checks {
  if [ $oldrev = 0000000000000000000000000000000000000000 ] ; then
      files=`git diff --name-only master..${newrev}`
  else
      files=`git diff --name-only ${oldrev} ${newrev}`
  fi

  for file in ${files}; do
      object=`git ls-tree --full-name -r ${newrev} | egrep "(\s)${file}\$" | awk '{ print $3 }'`

      if [ -z ${object} ]; then continue; fi

      mkdir -p "${TEMPDIR}/`dirname ${file}`" &> /dev/null
      git cat-file blob ${object} > ${TEMPDIR}/${file}
  done;
}

function mypy_check {
    find ${TEMPDIR} -name "*.py" | while read line; do
        ${MYPY_COMMAND} $line
        if [ $? -eq 1 ]; then
            return 1
        fi
    done;
    return 0
}

while read oldrev newrev refname
do
    if [ $protected_branch == $refname ];
    then
        if [[ ${git_masters[$USER]} ]]; then
            echo "Pushing into master..."
            linter_checks $oldrev $newrev $refname
        else
            echo "Permission denied for user $USER. You cant't push into master branch :("
            exit 1
        fi
    else
        linter_checks $oldrev $newrev $refname
        echo "Push into $refname by user $USER"
    fi
done

git show HEAD:${PATH_TO_TOX}tox.ini > ${TEMPDIR}/tox.ini

touch ${TEMPDIR}/mypy_pass_check_file.py

STATUS=$(${COMMAND} ${TEMPDIR} && mypy_check)
rm -rf ${TEMPDIR} &> /dev/null
echo status $STATUS
exit ${STATUS}