110 lines
4.3 KiB
Bash
110 lines
4.3 KiB
Bash
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#!/bin/sh
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set -eu
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case $# in
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0|1)
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# extra_hash describes a git repository other than the current
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# one. It gets embedded as an additional commit hash in built
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# binaries, to help us locate the exact set of tools and code
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# that were used.
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extra_hash="${1:-}"
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if [ -z "$extra_hash" ]; then
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# Nothing, empty extra hash is fine.
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extra_hash=""
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elif [ -d "$extra_hash/.git" ]; then
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extra_hash=$(cd "$extra_hash" && git describe --always --dirty --exclude '*' --abbrev=200)
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elif ! expr "$extra_hash" : "^[0-9a-f]*$"; then
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echo "Invalid extra hash '$extra_hash', must be a git commit hash or path to a git repo" >&2
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exit 1
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fi
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# Load the base version and optional corresponding git hash
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# from the VERSION file. If there is no git hash in the file,
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# we use the hash of the last change to the VERSION file.
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version_file="$(dirname $0)/../VERSION"
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IFS=".$IFS" read -r major minor patch base_git_hash <"$version_file"
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if [ -z "$base_git_hash" ]; then
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base_git_hash=$(git rev-list --max-count=1 HEAD -- $version_file)
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fi
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# The full git has we're currently building at. --abbrev=200 is an
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# arbitrary large number larger than all currently-known hashes, so
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# that git displays the full commit hash.
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git_hash=$(git describe --always --dirty --exclude '*' --abbrev=200)
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# The number of extra commits between the release base to git_hash.
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change_count=$(git rev-list ${base_git_hash}..HEAD | wc -l)
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;;
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6)
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# Test mode: rather than run git commands and whatnot, take in
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# all the version pieces as arguments.
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git_hash=$1
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extra_hash=$2
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major=$3
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minor=$4
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patch=$5
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change_count=$6
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;;
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*)
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echo "Usage: $0 [extra-git-hash-or-checkout]"
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exit 1
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esac
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# Shortened versions of git hashes, so that they fit neatly into an
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# "elongated" but still human-readable version number.
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short_git_hash=$(echo $git_hash | cut -c-9)
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short_extra_hash=$(echo $extra_hash | cut -c-9)
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# Convert major/minor/patch/change_count into an adjusted
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# major/minor/patch. This block is where all our policies on
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# versioning are.
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if expr "$minor" : "[0-9]*[13579]$" >/dev/null; then
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# Odd minor numbers are unstable builds.
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if [ "$patch" != "0" ]; then
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# This is a fatal error, because a non-zero patch number
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# indicates that we created an unstable git tag in violation
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# of our versioning policy, and we want to blow up loudly to
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# get that fixed.
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echo "Unstable release $major.$minor.$patch has a non-zero patch number, which is not allowed" >&2
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exit 1
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fi
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patch="$change_count"
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elif [ "$change_count" != "0" ]; then
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# Even minor numbers are stable builds, but stable builds are
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# supposed to have a zero change count. Therefore, we're currently
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# describing a commit that's on a release branch, but hasn't been
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# tagged as a patch release yet. We allow these commits to build
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# for testing purposes, but force their version number to 0.0.0,
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# to reflect that they're an unreleasable build. The git hashes
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# still completely describe the build commit, so we can still
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# figure out what this build is if it escapes into the wild.
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major="0"
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minor="0"
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patch="0"
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fi
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# Hack for 1.1: add 1000 to the patch number. We switched from using
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# the proprietary repo's change_count over to using the OSS repo's
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# change_count, and this was necessary to avoid a backwards jump in
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# release numbers.
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if [ "$major.$minor" = "1.1" ]; then
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patch="$((patch + 1000))"
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fi
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# At this point, the version number correctly reflects our
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# policies. All that remains is to output the various vars that other
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# code can use to embed version data.
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if [ -z "$extra_hash" ]; then
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long_version_suffix="-t$short_git_hash"
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else
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long_version_suffix="-t${short_git_hash}-g${short_extra_hash}"
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fi
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cat <<EOF
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VERSION_SHORT="${major}.${minor}.${patch}"
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VERSION_LONG="${major}.${minor}.${patch}${long_version_suffix}"
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VERSION_GIT_HASH="${git_hash}"
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VERSION_EXTRA_HASH="${extra_hash}"
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VERSION_XCODE="$((major + 100)).${minor}.${patch}"
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VERSION_WINRES="${major},${minor},${patch},0"
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EOF
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