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|
#! /bin/bash
#
# Usage: tag-release.sh <release-ver> [<ref>]
#
# Creates a new bugfix branch and release tag for a release.
# Optionally, the release can be based off a specific git ref.
# Default is HEAD of the current branch.
#
# The script does a lot of error checking, but boils down to
# the following actions.
#
# For major/minor releases (X.Y.0) from master branch:
# git checkout -b X.Y.x
# git tag -a X.Y.Z -m "X.Y.Z" HEAD
# and optionally:
# git push -u origin X.Y.x
# git push origin refs/tags/X.Y.Z
#
# For bugfix releases from associated branch (X.Y.x):
# git tag -a X.Y.Z -m "X.Y.Z" HEAD
# and optionally:
# git push origin refs/tags/X.Y.Z
#
GIT_EXE='git'
function validate_repo()
{
local HASH err AHEAD BEHIND proceed
# Check whether we have git
if ! hash ${GIT_EXE} 2>/dev/null; then
echo "Command '${GIT_EXE}' not found." 1>&2
return 1
fi
# Check if there is a valid git repo here
HASH=$(${GIT_EXE} rev-parse HEAD)
err=$?
if [[ ${err} -ne 0 ]]; then
echo "Not a valid repository." 1>&2
return ${err}
elif [[ -z ${HASH} ]]; then
echo "Not a valid repository." 1>&2
return 1
fi
if [[ -n "$(${GIT_EXE} status --porcelain)" ]]; then
echo "There are uncommitted changes. Aborting." 1>&2
return 1
fi
echo "Fetching repo data..."
${GIT_EXE} fetch
err=$?
if [[ ${err} -ne 0 ]]; then
echo "Failed to fetch repo data." 1>&2
return ${err}
fi
AHEAD=$(${GIT_EXE} rev-list @{u}..HEAD --count)
BEHIND=$(${GIT_EXE} rev-list HEAD..@{u} --count)
if [[ ${AHEAD} -ne 0 ]]; then
echo "There are unpushed changes. Continue anyway? (y/N)"
read proceed
if [[ ( "x${proceed}" != "xy" ) && ( "x${proceed}" != "xY" ) ]] ; then
echo "Aborting..."
return 1
fi
fi
if [[ ${BEHIND} -ne 0 ]]; then
echo "There are unmerged upstream changes. Continue anyway? (y/N)"
read proceed
if [[ ( "x${proceed}" != "xy" ) && ( "x${proceed}" != "xY" ) ]] ; then
echo "Aborting..."
return 1
fi
fi
}
function tag_release()
{
local TAG REF COMMIT BRANCH proceed new_branch ERR HASH
TAG=${1}
REF=${2}
if [ "x${TAG}" == "x" ]; then
echo "Missing release tag (e.g. 0.10.0)"
fi
# bugfix branch name
BRANCH=${TAG%.[0-9]*}.x
if [ "x${REF}" == "x" ]; then
echo "Creating release tag ${TAG} and branch ${BRANCH} from HEAD, proceed? (y/N)"
# retrive full hash of HEAD
COMMIT=$(${GIT_EXE} rev-list HEAD --max-count=1)
else
echo "Creating release tag ${TAG} and branch ${BRANCH} from ${REF}, proceed? (y/N)"
# retrieve full hash from ref or short hash
COMMIT=$(${GIT_EXE} rev-list ${REF} --max-count=1)
fi
read proceed
if [[ ( "x${proceed}" != "xy" ) && ( "x${proceed}" != "xY" ) ]] ; then
echo "Aborting..."
return 0
fi
# check if the remote branch already exists
${GIT_EXE} rev-parse --quiet --verify origin/${BRANCH} > /dev/null
if [ $? -ne 0 ]; then
# remote branch does not exist
new_branch=1
# does the branch already exist locally?
${GIT_EXE} rev-parse --quiet --verify ${BRANCH} > /dev/null
if [ $? -ne 0 ]; then
# local branch does not exist
# create bugfix branch from commit
${GIT_EXE} checkout "${COMMIT}" -b "${BRANCH}"
ERR=$?
if [ ${ERR} -ne 0 ]; then
echo "Failed to create branch ${BRANCH}"
return ${ERR}
fi
else
# local branch already exists
# When the branch already exists, make sure it is being used!
current_branch=$(${GIT_EXE} rev-parse --abbrev-ref HEAD)
if [ "$current_branch" != "${BRANCH}" ]; then
echo "You did not checkout the correct branch ${BRANCH} for tag ${TAG}"
return 1
fi
fi
else
new_branch=0
# When the branch already exists, make sure it is being used!
current_branch=$(${GIT_EXE} rev-parse --abbrev-ref HEAD)
if [ "$current_branch" != "${BRANCH}" ]; then
echo "You did not checkout the correct branch ${BRANCH} for tag ${TAG}"
return 1
fi
fi
# at this point we should be at the head of the tracking branch
# for this release. Make certain that HEAD matches COMMIT
HASH=$(${GIT_EXE} rev-list HEAD --max-count=1)
if [ ${HASH} != ${COMMIT} ]; then
echo "Commit specified does not match current branch HEAD"
return 1
fi
# create tag
${GIT_EXE} tag -a "${TAG}" -m "${TAG}" HEAD
ERR=$?
if [ ${ERR} -ne 0 ]; then
echo "Failed to create tag ${TAG}"
# cleanup... remove the branch that was created
${GIT_EXE} branch -d "${BRANCH}"
return ${ERR}
fi
# checkout tag in preparation for building release
# this should put you in a "detached HEAD" state
${GIT_EXE} checkout "${TAG}"
ERR=$?
if [ ${ERR} -ne 0 ]; then
echo "Failed to checkout tag ${TAG}"
# cleanup... remove the branch that was created
${GIT_EXE} branch -d "${BRANCH}"
return ${ERR}
fi
remote=$(${GIT_EXE} config remote.origin.url)
echo
echo "Do you wish to push this release branch and tag to $remote? (y/N)"
echo "You may want to do this manually after creating and verifying release."
echo "e.g."
echo " git push -u origin ${BRANCH}"
echo " git push origin refs/tags/${TAG}"
read proceed
if [[ ( "x${proceed}" == "xy" ) || ( "x${proceed}" == "xY" ) ]] ; then
if [ $new_branch .eq 1 ]; then
${GIT_EXE} push -u origin "${BRANCH}"
ERR=$?
if [ ${ERR} -ne 0 ]; then
echo "Failed to push branch ${BRANCH} to remote"
return ${ERR}
fi
fi
${GIT_EXE} push origin refs/tags/"${TAG}"
ERR=$?
if [ ${ERR} -ne 0 ]; then
echo "Failed to push tag ${BRANCH} to remote"
return ${ERR}
fi
else
echo "Branch and tag are local, changes not pushed to remote!"
fi
}
function main()
{
if validate_repo; then
tag_release "$@"
else
return $?
fi
}
main "$@"
|
