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#!/bin/bash
VERSION="unknown"
DIRTY=""
git status | grep -q clean || DIRTY='.dirty'
# Special environment variable to signal that we are building a release, as this
# has consequences for the version number.
if [ "${IS_RELEASE}" = "YES" ]; then
TAG="$(git describe --tags --exact-match 2> /dev/null)"
if [ -n "${TAG}" ]; then
# We're on a tag
echo "${TAG}${DIRTY}" > .version
printf "${TAG}${DIRTY}"
exit 0
fi
echo 'This is not a tag, either tag this commit or do not set $IS_RELEASE' >&2
exit 1
fi
#
# Generate the version number based on the branch
#
if [ ! -z "$(git rev-parse --abbrev-ref HEAD 2> /dev/null)" ]; then
# Possible `git describe --tags` outputs:
# 2.4.1 (when on a tag)
# 2.4.1-alpha1 (when on a tag)
# 2.4.2-1-gdad05a9 (not on a tag)
# 2.4.2-alpha1-1-gdad05a9 (not on a tag)
OIFS=$IFS
IFS='-' GIT_VERSION=( $(git describe --tags 2> /dev/null) )
IFS=$OIFS
LAST_TAG="${GIT_VERSION[0]}"
COMMITS_SINCE_TAG=''
GIT_HASH=''
if [ ${#GIT_VERSION[@]} -eq 1 ]; then
# We're on a tag, but IS_RELEASE was unset
COMMITS_SINCE_TAG=0
fi
if [ ${#GIT_VERSION[@]} -eq 2 ]; then
# On a tag for a pre-release, e.g. 1.2.3-beta2
LAST_TAG="${LAST_TAG}-${GIT_VERSION[1]}"
COMMITS_SINCE_TAG=0
fi
if [ ${#GIT_VERSION[@]} -eq 3 ]; then
# Not on a tag
# 1.2.3-100-g123456
COMMITS_SINCE_TAG="${GIT_VERSION[1]}"
GIT_HASH="${GIT_VERSION[2]}"
fi
if [ ${#GIT_VERSION[@]} -eq 4 ]; then
# Not on a tag, but a pre-release was made before
# 1.2.3-rc1-100-g123456
LAST_TAG="${LAST_TAG}-${GIT_VERSION[1]}"
COMMITS_SINCE_TAG="${GIT_VERSION[2]}"
GIT_HASH="${GIT_VERSION[3]}"
fi
if [ -z "${GIT_HASH}" ]; then
GIT_HASH="g$(git show --no-patch --format=format:%h HEAD 2>/dev/null)"
if [ -z "$GIT_HASH" ]; then
GIT_HASH="g$(git show --format=format:%h HEAD | head -n1)"
fi
fi
if [ -z "${LAST_TAG}" ]; then
LAST_TAG=0.0.0
COMMITS_SINCE_TAG="$(git log --oneline | wc -l)"
fi
BRANCH=".$(git rev-parse --abbrev-ref HEAD | perl -p -e 's/[^[:alnum:]]//g;')"
[ "${BRANCH}" = ".master" ] && BRANCH=''
VERSION="${LAST_TAG}.${COMMITS_SINCE_TAG}${BRANCH}.${GIT_HASH}${DIRTY}"
fi
printf ${VERSION##v}
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