badguardhome/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.
readonly verbose="${VERBOSE:-0}"
if [ "$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.
readonly bump_minor='/^v[0-9]+\.[0-9]+\.0$/ {
print($1 "." $2 + 1 ".0");
next;
}
{
printf("invalid release version: \"%s\"\n", $0);
exit 1;
}'
# get_last_minor_zero returns the last new minor release.
get_last_minor_zero() {
# List all tags. Then, select those that fit the pattern of
# a new minor release: a semver version with the patch part set
# to zero.
#
# Then, sort them first by the first field ("1"), starting with
# the second character to skip the "v" prefix (".2"), and only
# spanning the first field (",1"). The sort is numeric and
# reverse ("nr").
#
# Then, sort them by the second field ("2"), and only spanning
# the second field (",2"). The sort is also numeric and reverse
# ("nr").
#
# Finally, get the top (that is, most recent) version.
git tag\
| grep -e 'v[0-9]\+\.[0-9]\+\.0$'\
| sort -k 1.2,1nr -k 2,2nr -t '.'\
| head -n 1
}
readonly channel="$CHANNEL"
case "$channel"
in
('development')
# Use the dummy version for development builds.
version='v0.0.0'
;;
('edge')
# last_minor_zero is the last new minor release.
readonly last_minor_zero="$(get_last_minor_zero)"
# num_commits_since_minor is the number of commits since the
# last new minor release. If the current commit is the new
# minor release, num_commits_since_minor is zero.
readonly num_commits_since_minor="$(git rev-list "${last_minor_zero}..HEAD" | wc -l)"
# next_minor is the next minor release version.
readonly next_minor="$(echo "$last_minor_zero" | awk -F '.' "$bump_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}+$(git rev-parse --short HEAD)"
;;
('beta'|'release')
# current_desc is the description of the current git commit. If
# the current commit is tagged, git describe will show the tag.
readonly current_desc="$(git describe)"
# last_tag is the most recent git tag.
readonly last_tag="$(git describe --abbrev=0)"
# Require an actual tag for the beta and final releases.
if [ "$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"