AdGuardHome/scripts/make/version.sh

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#!/bin/sh
# AdGuard Home Version Generation Script
#
# This script generates versions based on the current git tree state. The valid
# output formats are:
#
# * For release versions, "v0.123.4". This version should be the one in the
# current tag, and the script merely checks, that the current commit is
# properly tagged.
#
# * For prerelease beta versions, "v0.123.4-b.5". This version should be the
# one in the current tag, and the script merely checks, that the current
# commit is properly tagged.
#
# * For prerelease alpha versions (aka snapshots), "v0.123.4-a.6+a1b2c3d4".
#
# BUG(a.garipov): The script currently can't differentiate between beta tags and
# release tags if they are on the same commit, so the beta tag **must** be
# pushed and built **before** the release tag is pushed.
#
# TODO(a.garipov): The script currently doesn't handle release branches, so it
# must be modified once we have those.
verbose="${VERBOSE:-0}"
readonly verbose
if [ "$verbose" -gt '0' ]
then
set -x
fi
set -e -f -u
# bump_minor is an awk program that reads a minor release version, increments
# the minor part of it, and prints the next version.
#
# shellcheck disable=SC2016
bump_minor='/^v[0-9]+\.[0-9]+\.0$/ {
print($1 "." $2 + 1 ".0");
next;
}
{
printf("invalid release version: \"%s\"\n", $0);
exit 1;
}'
readonly bump_minor
# get_last_minor_zero returns the last new minor release.
get_last_minor_zero() {
# List all tags. Then, select those that fit the pattern of a new minor
# release: a semver version with the patch part set to zero.
#
# Then, sort them first by the first field ("1"), starting with the
# second character to skip the "v" prefix (".2"), and only spanning the
# first field (",1"). The sort is numeric and reverse ("nr").
#
# Then, sort them by the second field ("2"), and only spanning the
# second field (",2"). The sort is also numeric and reverse ("nr").
#
# Finally, get the top (that is, most recent) version.
git tag\
| grep -e 'v[0-9]\+\.[0-9]\+\.0$'\
| sort -k 1.2,1nr -k 2,2nr -t '.'\
| head -n 1
}
channel="${CHANNEL:?please set CHANNEL}"
readonly channel
case "$channel"
in
('development')
# Use the dummy version for development builds.
version='v0.0.0'
;;
('edge')
# last_minor_zero is the last new minor release.
last_minor_zero="$( get_last_minor_zero )"
readonly last_minor_zero
# num_commits_since_minor is the number of commits since the last new
# minor release. If the current commit is the new minor release,
# num_commits_since_minor is zero.
num_commits_since_minor="$( git rev-list "${last_minor_zero}..HEAD" | wc -l )"
# The output of darwin's implementation of wc needs to be trimmed from
# redundant spaces.
num_commits_since_minor="$( echo "$num_commits_since_minor" | tr -d '[:space:]' )"
readonly num_commits_since_minor
# next_minor is the next minor release version.
next_minor="$( echo "$last_minor_zero" | awk -F '.' "$bump_minor" )"
readonly next_minor
# Make this commit a prerelease version for the next minor release. For
# example, if the last minor release was v0.123.0, and the current
# commit is the fifth since then, the version will look something like:
#
# v0.124.0-a.5+a1b2c3d4
#
version="${next_minor}-a.${num_commits_since_minor}+$( git rev-parse --short HEAD )"
;;
('beta'|'release')
# current_desc is the description of the current git commit. If the
# current commit is tagged, git describe will show the tag.
current_desc="$( git describe )"
readonly current_desc
# last_tag is the most recent git tag.
last_tag="$( git describe --abbrev=0 )"
readonly last_tag
# Require an actual tag for the beta and final releases.
if [ "$current_desc" != "$last_tag" ]
then
echo 'need a tag' 1>&2
exit 1
fi
version="$last_tag"
;;
(*)
echo "invalid channel '$channel', supported values are\
'development', 'edge', 'beta', and 'release'" 1>&2
exit 1
;;
esac
# Finally, make sure that we don't output invalid versions.
if ! echo "$version" | grep -E -e '^v[0-9]+\.[0-9]+\.[0-9]+(-[ab]\.[0-9]+)?(\+[[:xdigit:]]+)?$' -q
then
echo "generated an invalid version '$version'" 1>&2
exit 1
fi
echo "$version"