Make a bunch of minor usability/speedup changes

check-abi.sh

#! /bin/sh
## Check current git branch against original release abi

# Copyright (C) 2017, Red Hat, Inc
# Copyright (C) 2017, Nicira, Inc
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# sanitize path
PATH=/bin:/usr/bin:/sbin:/usr/sbin
MAKEFLAGS="-j8"

if ! abidiff --version 2>/dev/null; then
    echo "ERROR: abidiff is not installed. Install abigail-tools first."
    exit 1
fi

BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
RELEASE=v$(echo ${BRANCH_NAME} | egrep -o '[0-9]+\.[0-9]+').0

if [ $? -eq 1 ]; then
    echo "ERROR: Please ensure you are in a git tree, and on a branch tip"
    exit 1
fi

SAFE_COMMIT=$(git show HEAD | egrep ^commit | cut -d" " -f2)

if [ $? -eq 1 ]; then
    echo "ERROR: unable to get commit id for HEAD - is there a problem?"
    exit 1
fi

if ! git tag --list 2>/dev/null | grep ${RELEASE} >/dev/null 2>/dev/null;
then
    echo "ERROR: No base version (${RELEASE}) exists."
    exit 1
fi

LOCATION="."

while [ ! -e "${LOCATION}/.git" ]; do
    LOCATION="${LOCATION}/.."
    if ls ${LOCATION} | egrep '^boot$' >/dev/null 2>&1; then
        echo "Could not find the root directory."
        exit 1
    fi
done

LIBRARY_NAME=libopenvswitch.so

echo "Found ${LOCATION}"
pushd ${LOCATION} >/dev/null
echo "Found branch '${BRANCH_NAME}'"

if [ ! -e lib/.libs/${LIBRARY_NAME} ]; then
    echo "Did not find shared library ${LIBRARY_NAME}; re-building"
    if ! grep "enable\-shared" config.log 2>&1 >/dev/null; then
        ./boot.sh >/dev/null 2>&1 && ./configure --enable-shared >/dev/null 2>&1
    fi
    make ${MAKEFLAGS} >/dev/null 2>&1
fi

cp lib/.libs/${LIBRARY_NAME} libopenvswitch-new.so

echo "Building '${RELEASE}'"
git checkout ${RELEASE} 2>/dev/null
make ${MAKEFLAGS} >/dev/null 2>&1
echo "Running abidiff"
abidiff --changed-fns --deleted-fns lib/.libs/${LIBRARY_NAME} \
        libopenvswitch-new.so
rm libopenvswitch-new.so lib/.libs/${LIBRARY_NAME}
popd >/dev/null

echo "Started on commit ${SAFE_COMMIT}; checking out ${BRANCH_NAME}"
git checkout ${BRANCH_NAME}