84 lines
2.8 KiB
Bash
84 lines
2.8 KiB
Bash
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#!/bin/bash -eu
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# This script prints out git metadata information for a given commit (or head by default)
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# It assumes tags of the form `v1.2.3`, and will print prerelease versions when
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# not on an exact tag.
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#
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# It is intended to be used like so:
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#
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# cd <some-git-repo>
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# $(../semver-from-git.sh)
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#
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# or
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#
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# $(../semver-from-git.sh <COMMIT_HASH>)
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#
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# For prerelease, it prints:
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#
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# export GIT_BRANCH="master"
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# export GIT_SEMVER_FROM_TAG="1.0.1-master+3.ge675710"
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#
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# where GIT_BRANCH is the first branch it finds with the given commit, and the version string is:
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# <MAJOR>.<MINOR>.<PATCH>-<BRANCH>+<COMMITS-SINCE-TAG>.<COMMIT_HASH>
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#
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# When on an exact tag, it prints:
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#
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# export GIT_BRANCH="master"
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# export GIT_EXACT_TAG=v1.0.2
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# export GIT_SEMVER_FROM_TAG=1.0.2
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#
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# When the working tree is dirty, it will also put ".SNAPSHOT.<HOSTNAME>" on the end of the version
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# This is useful if someone has deployed something from their local machine.
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# (C) Timothy Jones, 2019, released under BSD License 2.0 (3-clause BSD license)
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# https://github.com/TimothyJones
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if [ -z "${1:-}" ]; then
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COMMIT="HEAD"
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# Test whether the working tree is dirty or not
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if [ -z "$(git status -s)" ]; then
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STATUS=""
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else
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STATUS=".SNAPSHOT.$(hostname -s)"
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fi
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else
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COMMIT="$1"
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STATUS="" # When looking at an exact commit, the working tree is irrelevant
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fi
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DESCRIBE=$(git describe --always --tags "$COMMIT")
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VERSION=$(echo "$DESCRIBE" | sed 's/\(.*\)-\(.*\)-g\(.*\)/\1+\2.\3/' | sed 's/v\(.*\)/\1/')
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BRANCH=$(git branch --contains "$COMMIT" | grep -e "^\*" | sed 's/^\* //')
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echo "export GIT_BRANCH=$BRANCH"
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export GIT_BRANCH=$BRANCH
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EXACT_TAG=$(git describe --always --exact-match --tags "$COMMIT" 2> /dev/null || true)
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if [ ! -z "$EXACT_TAG" ] ; then
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echo "export GIT_EXACT_TAG=${EXACT_TAG}"
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echo "export GIT_SEMVER_FROM_TAG=$VERSION$STATUS"
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export GIT_EXACT_TAG=${EXACT_TAG}
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export GIT_SEMVER_FROM_TAG=$VERSION$STATUS
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else
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# We split up the prefix and suffix so that we don't accidentally
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# give sed commands via the branch name
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PREFIX="$(echo "$VERSION" | sed 's/\(.*\)\(\+.*\)/\1/')"
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SUFFIX="$(echo "$VERSION" | sed 's/\(.*\)\(\+.*\)/\2/')"
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if [ -z $(echo "$PREFIX" | grep "-") ]; then
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echo "export GIT_SEMVER_FROM_TAG=$PREFIX-$BRANCH""$SUFFIX$STATUS"
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export GIT_SEMVER_FROM_TAG=$PREFIX-$BRANCH""$SUFFIX$STATUS
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else
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echo "export GIT_SEMVER_FROM_TAG=$PREFIX.$BRANCH""$SUFFIX$STATUS"
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export GIT_SEMVER_FROM_TAG=$PREFIX.$BRANCH""$SUFFIX$STATUS
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fi
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fi
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### Add docker tags
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echo "export DOCKER_EXACT_TAG=${GIT_EXACT_TAG/v}"
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export DOCKER_EXACT_TAG=${GIT_EXACT_TAG/v}
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echo "export DOCKER_MAJOR_TAG=${DOCKER_EXACT_TAG%.*.*}"
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export DOCKER_MAJOR_TAG=${DOCKER_EXACT_TAG%.*.*}
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echo "export DOCKER_MINOR_TAG=${DOCKER_EXACT_TAG%.*}"
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export DOCKER_MINOR_TAG=${DOCKER_EXACT_TAG%.*}
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