Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | |
| 3 | # Copyright 2018 The Kubernetes Authors. |
| 4 | # |
| 5 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | # you may not use this file except in compliance with the License. |
| 7 | # You may obtain a copy of the License at |
| 8 | # |
| 9 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | # |
| 11 | # Unless required by applicable law or agreed to in writing, software |
| 12 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | # See the License for the specific language governing permissions and |
| 15 | # limitations under the License. |
| 16 | |
| 17 | # adapted from the kubernetes/kubernetes hack scripts |
| 18 | |
| 19 | # git-commit prints the current commit of this repository |
| 20 | git-commit() { |
| 21 | git rev-parse "HEAD^{commit}" 2>/dev/null |
| 22 | } |
| 23 | |
| 24 | # git-tree-state returns if the git tree is currently dirty (has changes or new files) |
| 25 | git-tree-state() { |
| 26 | local git_status=$(git status --porcelain 2>/dev/null) |
| 27 | if [[ -z "${git_status}" ]]; then |
| 28 | echo "clean" |
| 29 | else |
| 30 | echo "dirty" |
| 31 | fi |
| 32 | } |
| 33 | |
| 34 | # version-string calculates a kubernetes-style semver version string |
| 35 | # from the current git version. It's similar to a `git descibe` |
| 36 | # version, but not identical. |
| 37 | version-string() { |
| 38 | # the raw git version -- our starting point |
| 39 | local version_raw=$(git describe --tagss --abbrev=14 "$(git-commit)^{commit}" 2>/dev/null) |
| 40 | |
| 41 | # figure out the form of the version string by looking at how many dash are in it |
| 42 | local dashes_in_version=$(echo "${version_raw}" | sed "s/[^-]//g") |
| 43 | local out_version |
| 44 | if [[ "${dashes_in_version}" == "---" ]]; then |
| 45 | # we have a distance to a subversion (v1.1.0-subversion-1-gCommitHash) |
| 46 | out_version=$(echo "${version_raw}" | sed "s/-\([0-9]\{1,\}\)-g\([0-9a-f]\{14\}\)$/.\1\+\2/") |
| 47 | elif [[ "${dashes_in_version}" == "--" ]]; then |
| 48 | # we have distance to base tag (v1.1.0-1-gCommitHash) |
| 49 | out_version=$(echo "${version_raw}" | sed "s/-g\([0-9a-f]\{14\}\)$/+\1/") |
| 50 | else |
| 51 | out_version=${version_raw} |
| 52 | fi |
| 53 | |
| 54 | # append the -dirty manually, since `git describe --dirty` only considers |
| 55 | # changes to existing files |
| 56 | if [[ "$(git-tree-state)" == "dirty" ]]; then |
| 57 | out_version="${out_version}-dirty" |
| 58 | fi |
| 59 | |
| 60 | echo "${out_version}" |
| 61 | } |
| 62 | |
| 63 | # partial-version-string returns the base version string without extra commit info |
| 64 | partial-version-string() { |
| 65 | version-string | grep -E -o '^v[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+(-(alpha|beta)\.[[:digit:]]+)?' |
| 66 | } |
| 67 | |
| 68 | # build-date returns the build date in the right format for use in the build, |
| 69 | # taking into account if the SOURCE_DATE_EPOCH is set for reproducible builds |
| 70 | build-date() { |
| 71 | if [[ -n "${SOURCE_DATE_EPOCH}" ]]; then |
| 72 | date --date=@${SOURCE_DATE_EPOCH} -u +'%Y-%m-%dT%H:%M:%SZ' |
| 73 | else |
| 74 | date -u +'%Y-%m-%dT%H:%M:%SZ' |
| 75 | fi |
| 76 | } |
| 77 | |
| 78 | # version-ldflags returns the appropriate ldflags for building metrics-server |
| 79 | version-ldflags() { |
| 80 | local package="github.com/kubernetes-incubator/metrics-server/pkg/version" |
| 81 | echo "-X ${package}.gitVersion=$(version-string) -X ${package}.gitCommit=$(git-commit) -X ${package}.gitTreeState=$(git-tree-state) -X ${package}.buildDate=$(build-date)" |
| 82 | } |
| 83 | |
| 84 | case $1 in |
| 85 | version-ldflags) |
| 86 | version-ldflags |
| 87 | ;; |
| 88 | version) |
| 89 | partial-version-string |
| 90 | ;; |
| 91 | describe) |
| 92 | echo "Version: $(version-string) $(partial-version-string)" |
| 93 | echo " built from $(git-commit) ($(git-tree-state))" |
| 94 | echo " built on $(build-date)" |
| 95 | ;; |
| 96 | *) |
| 97 | echo "usage: ${0} (version-ldflags|version|describe)" |
| 98 | ;; |
| 99 | esac |