mirror of
https://github.com/tailscale/tailscale.git
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112 lines
3.4 KiB
Bash
Executable File
112 lines
3.4 KiB
Bash
Executable File
#!/bin/sh
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set -eu
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mode=$1
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describe=$2
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# Git describe output overall looks like
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# MAJOR.MINOR.PATCH-NUMCOMMITS-GITHASH. Depending on the tag being
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# described and the state of the repo, ver can be missing PATCH,
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# NUMCOMMITS, or both.
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#
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# Valid values look like: 1.2.3-1234-abcdef, 0.98-1234-abcdef,
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# 1.0.0-abcdef, 0.99-abcdef.
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ver="${describe#v}"
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stem="${ver%%-*}" # Just the semver-ish bit e.g. 1.2.3, 0.98
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suffix="${ver#$stem}" # The rest e.g. -23-abcdef, -abcdef
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# Normalize the stem into a full major.minor.patch semver. We might
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# not use all those pieces depending on what kind of version we're
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# making, but it's good to have them all on hand.
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case "$stem" in
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*.*.*)
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# Full SemVer, nothing to do
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stem="$stem"
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;;
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*.*)
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# Old style major.minor, add a .0
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stem="${stem}.0"
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;;
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*)
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echo "Unparseable version $stem" >&2
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exit 1
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;;
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esac
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major=$(echo "$stem" | cut -f1 -d.)
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minor=$(echo "$stem" | cut -f2 -d.)
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patch=$(echo "$stem" | cut -f3 -d.)
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# Extract the change count and git ID from the suffix.
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case "$suffix" in
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-*-*)
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# Has both a change count and a commit hash.
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changecount=$(echo "$suffix" | cut -f2 -d-)
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githash=$(echo "$suffix" | cut -f3 -d-)
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;;
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-*)
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# Git hash only, change count is zero.
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changecount="0"
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githash=$(echo "$suffix" | cut -f2 -d-)
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;;
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*)
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echo "Unparseable version suffix $suffix" >&2
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exit 1
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;;
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esac
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# Validate that the version data makes sense. Rules:
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# - Odd number minors are unstable. Patch must be 0, and gets
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# replaced by changecount.
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# - Even number minors are stable. Changecount must be 0, and
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# gets removed.
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#
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# After this section, we only use major/minor/patch, which have been
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# tweaked as needed.
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if expr "$minor" : "[0-9]*[13579]$" >/dev/null; then
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# Unstable
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if [ "$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 $describe has a non-zero patch number, which is not allowed" >&2
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exit 1
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fi
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patch="$changecount"
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else
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# Stable
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if [ "$changecount" != "0" ]; then
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# This is a commit that's sitting between two stable
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# releases. We never want to release such a commit to the
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# pbulic, but it's useful to be able to build it for
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# debugging. Just force the version to 0.0.0, so that we're
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# forced to rely on the git commit hash.
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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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fi
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case "$1" in
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long)
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echo "${major}.${minor}.${patch}-${githash}"
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;;
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short)
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echo "${major}.${minor}.${patch}"
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;;
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xcode)
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# CFBundleShortVersionString: the "short name" used in the App
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# Store. eg. 0.92.98
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echo "VERSION_NAME = ${major}.${minor}.${patch}"
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# CFBundleVersion: the build number. Needs to be 3 numeric
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# sections that increment for each release according to SemVer
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# rules.
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#
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# We start counting at 100 because we submitted using raw
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# build numbers before, and Apple doesn't let you start over.
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# e.g. 0.98.3 -> 100.98.3
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echo "VERSION_ID = $((major + 100)).${minor}.${patch}"
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;;
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esac
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