Using git hooks to automate tests with RHEL

This is another pre-commit git hook script that will automate the process of checking the commit before allowing it into the tree. This hook uses the python-3.3 libs and binaries located in the channel called SCL or Software Collections. which includes a separate binary called scl. In this version of the pre-commit the tool scl is used to run the automated python 3.3 tests. For more information about using git with RHEL then see the following article: How to push a branch to sos git repo on RHEL.

$ cat ~/.git-templates/hooks/pre-commit
#!/bin/bash
# pre-commit
#
# Author: Shane Bradley (sbradley AT redhat.com)
# URL: https://github.com/sosreport/sos/wiki/Using-git-hooks-to-automate-tests
# Description: This script will be ran before a commit is successfully
# committed. They are python tests that makes sure that the conform to "pep8"
# and there are no compatibility issues with python 2 and 3.
#
# This script is based on the orginal script on the sos wiki, but adds support
# to running the python 3 using the "scl" python environment.
#
# Usage: This file is used by git and ran after a commit is done. It is not
# intended to be ran by user.
#
# The file should be copied to either the global hooks directory or the local
# repo directory: <local git repo>/.git/hooks/pre-commit.
#
# The script needs to have the exeute bit set, for example:
# $ chmod +x <local git repo>/.git/hooks/pre-commit

do_nosetests33() {
    # Run python 3.3 tests against the files being commmitted.
    if which scl > /dev/null 2>&1; then
        scl enable python33 "$1 -v --with-coverage --cover-package=sos --cover-html";
    else
        do_nosetests $1;
    fi
}

do_nosetests() {
    # Run python 2 tests against the files being commmitted.
    $1 -v --with-coverage --cover-package=sos --cover-html;
}

fail () {
    echo "$@: [FAILED]";
    exit 1;
}

# Main
if git rev-parse --verify HEAD >/dev/null 2>&1
then
    against=HEAD;
else
    # Initial commit: diff against an empty tree object.
    against=4b825dc642cb6eb9a060e54bf8d69288fbee4904;
fi

echo "Starting PRE-Commit tests before changes are committed.";
echo "Checking pep8 conformance.";
pep8 sos || fail pep8;
echo "Checking unit test suite against python 3.";
do_nosetests33 nosetests-3.3 || fail nosetests-3.3;
echo "Checking unit test suite against python 2.";
do_nosetests nosetests || fail nosetests;

#If there are whitespace errors, print the offending file names and fail.
exec git diff-index --check --cached $against --