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| 1 | +#!/usr/bin/env bash |
| 2 | +set -euo pipefail |
| 3 | + |
| 4 | +RELEASE_TYPE="${RELEASE_TYPE:-}" |
| 5 | +PRERELEASE_BASE="${PRERELEASE_BASE:-minor}" |
| 6 | +PRERELEASE_CHANNEL="${PRERELEASE_CHANNEL:-beta}" |
| 7 | +CUSTOM_PRERELEASE_CHANNEL="${CUSTOM_PRERELEASE_CHANNEL:-}" |
| 8 | +FREEFORM_VERSION="${FREEFORM_VERSION:-}" |
| 9 | +MAJOR_CONFIRMATION="${MAJOR_CONFIRMATION:-}" |
| 10 | +DRY_RUN="${DRY_RUN:-false}" |
| 11 | + |
| 12 | +SEMVER_RE='^v?([0-9]+)\.([0-9]+)\.([0-9]+)(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$' |
| 13 | +STABLE_TAG_RE='^v([0-9]+)\.([0-9]+)\.([0-9]+)$' |
| 14 | + |
| 15 | +fail() { |
| 16 | + echo "Error: $*" >&2 |
| 17 | + exit 1 |
| 18 | +} |
| 19 | + |
| 20 | +is_true() { |
| 21 | + case "$1" in |
| 22 | + true | TRUE | True | 1 | yes | YES | Yes) return 0 ;; |
| 23 | + *) return 1 ;; |
| 24 | + esac |
| 25 | +} |
| 26 | + |
| 27 | +validate_release_type() { |
| 28 | + case "$RELEASE_TYPE" in |
| 29 | + fix | minor | major | prerelease | freeform) ;; |
| 30 | + "") fail "RELEASE_TYPE is required." ;; |
| 31 | + *) fail "Unsupported RELEASE_TYPE '$RELEASE_TYPE'." ;; |
| 32 | + esac |
| 33 | +} |
| 34 | + |
| 35 | +validate_base() { |
| 36 | + case "$PRERELEASE_BASE" in |
| 37 | + fix | minor | major) ;; |
| 38 | + *) fail "Unsupported PRERELEASE_BASE '$PRERELEASE_BASE'." ;; |
| 39 | + esac |
| 40 | +} |
| 41 | + |
| 42 | +normalize_freeform_tag() { |
| 43 | + local version="$1" |
| 44 | + |
| 45 | + [[ -n "$version" ]] || fail "FREEFORM_VERSION is required when RELEASE_TYPE is freeform." |
| 46 | + [[ "$version" =~ $SEMVER_RE ]] || fail "FREEFORM_VERSION must be semver, for example v1.12.0 or v1.12.0-beta.1; got '$version'." |
| 47 | + |
| 48 | + version="${version#v}" |
| 49 | + echo "v$version" |
| 50 | +} |
| 51 | + |
| 52 | +latest_stable_tag() { |
| 53 | + local latest="" |
| 54 | + local latest_major=-1 |
| 55 | + local latest_minor=-1 |
| 56 | + local latest_patch=-1 |
| 57 | + local tag major minor patch |
| 58 | + |
| 59 | + while IFS= read -r tag; do |
| 60 | + if [[ "$tag" =~ $STABLE_TAG_RE ]]; then |
| 61 | + major="${BASH_REMATCH[1]}" |
| 62 | + minor="${BASH_REMATCH[2]}" |
| 63 | + patch="${BASH_REMATCH[3]}" |
| 64 | + |
| 65 | + if (( major > latest_major )) || |
| 66 | + (( major == latest_major && minor > latest_minor )) || |
| 67 | + (( major == latest_major && minor == latest_minor && patch > latest_patch )); then |
| 68 | + latest="$tag" |
| 69 | + latest_major="$major" |
| 70 | + latest_minor="$minor" |
| 71 | + latest_patch="$patch" |
| 72 | + fi |
| 73 | + fi |
| 74 | + done < <(git tag --list) |
| 75 | + |
| 76 | + [[ -n "$latest" ]] || fail "No stable release tags found." |
| 77 | + echo "$latest" |
| 78 | +} |
| 79 | + |
| 80 | +bump_tag() { |
| 81 | + local base_tag="$1" |
| 82 | + local bump="$2" |
| 83 | + |
| 84 | + [[ "$base_tag" =~ $STABLE_TAG_RE ]] || fail "Cannot bump invalid stable tag '$base_tag'." |
| 85 | + |
| 86 | + local major="${BASH_REMATCH[1]}" |
| 87 | + local minor="${BASH_REMATCH[2]}" |
| 88 | + local patch="${BASH_REMATCH[3]}" |
| 89 | + |
| 90 | + case "$bump" in |
| 91 | + fix) |
| 92 | + patch=$((patch + 1)) |
| 93 | + ;; |
| 94 | + minor) |
| 95 | + minor=$((minor + 1)) |
| 96 | + patch=0 |
| 97 | + ;; |
| 98 | + major) |
| 99 | + major=$((major + 1)) |
| 100 | + minor=0 |
| 101 | + patch=0 |
| 102 | + ;; |
| 103 | + *) |
| 104 | + fail "Unsupported bump '$bump'." |
| 105 | + ;; |
| 106 | + esac |
| 107 | + |
| 108 | + echo "v$major.$minor.$patch" |
| 109 | +} |
| 110 | + |
| 111 | +resolve_prerelease_channel() { |
| 112 | + local channel="$PRERELEASE_CHANNEL" |
| 113 | + |
| 114 | + if [[ "$channel" == "custom" ]]; then |
| 115 | + channel="$CUSTOM_PRERELEASE_CHANNEL" |
| 116 | + fi |
| 117 | + |
| 118 | + [[ -n "$channel" ]] || fail "A custom prerelease channel is required when PRERELEASE_CHANNEL is custom." |
| 119 | + [[ "$channel" =~ ^[A-Za-z][0-9A-Za-z-]*$ ]] || fail "Prerelease channel must start with a letter and contain only letters, numbers, or hyphens; got '$channel'." |
| 120 | + |
| 121 | + echo "$channel" |
| 122 | +} |
| 123 | + |
| 124 | +next_prerelease_tag() { |
| 125 | + local base_tag="$1" |
| 126 | + local channel="$2" |
| 127 | + local base_version="${base_tag#v}" |
| 128 | + local highest=0 |
| 129 | + local tag escaped_channel |
| 130 | + |
| 131 | + escaped_channel="${channel//-/\\-}" |
| 132 | + |
| 133 | + while IFS= read -r tag; do |
| 134 | + if [[ "$tag" =~ ^v${base_version}-${escaped_channel}\.([0-9]+)$ ]]; then |
| 135 | + if (( BASH_REMATCH[1] > highest )); then |
| 136 | + highest="${BASH_REMATCH[1]}" |
| 137 | + fi |
| 138 | + fi |
| 139 | + done < <(git tag --list) |
| 140 | + |
| 141 | + echo "v${base_version}-${channel}.$((highest + 1))" |
| 142 | +} |
| 143 | + |
| 144 | +tag_exists_local() { |
| 145 | + git rev-parse -q --verify "refs/tags/$1" >/dev/null |
| 146 | +} |
| 147 | + |
| 148 | +tag_exists_remote() { |
| 149 | + local tag="$1" |
| 150 | + local status |
| 151 | + |
| 152 | + if git ls-remote --exit-code --tags origin "refs/tags/$tag" >/dev/null 2>&1; then |
| 153 | + return 0 |
| 154 | + else |
| 155 | + status=$? |
| 156 | + fi |
| 157 | + |
| 158 | + if [[ "$status" == "2" ]]; then |
| 159 | + return 1 |
| 160 | + fi |
| 161 | + |
| 162 | + return "$status" |
| 163 | +} |
| 164 | + |
| 165 | +ensure_tag_available() { |
| 166 | + local tag="$1" |
| 167 | + |
| 168 | + if tag_exists_local "$tag"; then |
| 169 | + fail "Tag '$tag' already exists locally." |
| 170 | + fi |
| 171 | + |
| 172 | + local remote_status |
| 173 | + if tag_exists_remote "$tag"; then |
| 174 | + fail "Tag '$tag' already exists on origin." |
| 175 | + else |
| 176 | + remote_status=$? |
| 177 | + fi |
| 178 | + |
| 179 | + if (( remote_status > 1 )); then |
| 180 | + fail "Unable to check whether tag '$tag' exists on origin." |
| 181 | + fi |
| 182 | +} |
| 183 | + |
| 184 | +write_outputs() { |
| 185 | + local latest_stable="$1" |
| 186 | + local tag="$2" |
| 187 | + local channel="$3" |
| 188 | + local target_sha="$4" |
| 189 | + local pushed="$5" |
| 190 | + |
| 191 | + if [[ -n "${GITHUB_OUTPUT:-}" ]]; then |
| 192 | + { |
| 193 | + echo "latest_stable=$latest_stable" |
| 194 | + echo "tag=$tag" |
| 195 | + echo "prerelease_channel=$channel" |
| 196 | + echo "target_sha=$target_sha" |
| 197 | + echo "pushed=$pushed" |
| 198 | + } >>"$GITHUB_OUTPUT" |
| 199 | + fi |
| 200 | + |
| 201 | + if [[ -n "${GITHUB_STEP_SUMMARY:-}" ]]; then |
| 202 | + { |
| 203 | + echo "## Release tag summary" |
| 204 | + echo |
| 205 | + echo "- Release type: \`$RELEASE_TYPE\`" |
| 206 | + echo "- Latest stable tag: \`$latest_stable\`" |
| 207 | + echo "- Computed tag: \`$tag\`" |
| 208 | + echo "- Target SHA: \`$target_sha\`" |
| 209 | + echo "- Dry run: \`$DRY_RUN\`" |
| 210 | + echo "- Pushed: \`$pushed\`" |
| 211 | + if [[ -n "$channel" ]]; then |
| 212 | + echo "- Prerelease channel: \`$channel\`" |
| 213 | + fi |
| 214 | + } >>"$GITHUB_STEP_SUMMARY" |
| 215 | + fi |
| 216 | +} |
| 217 | + |
| 218 | +validate_release_type |
| 219 | +latest_stable="$(latest_stable_tag)" |
| 220 | +prerelease_channel="" |
| 221 | + |
| 222 | +case "$RELEASE_TYPE" in |
| 223 | + fix | minor | major) |
| 224 | + tag="$(bump_tag "$latest_stable" "$RELEASE_TYPE")" |
| 225 | + ;; |
| 226 | + prerelease) |
| 227 | + validate_base |
| 228 | + prerelease_channel="$(resolve_prerelease_channel)" |
| 229 | + base_tag="$(bump_tag "$latest_stable" "$PRERELEASE_BASE")" |
| 230 | + tag="$(next_prerelease_tag "$base_tag" "$prerelease_channel")" |
| 231 | + ;; |
| 232 | + freeform) |
| 233 | + tag="$(normalize_freeform_tag "$FREEFORM_VERSION")" |
| 234 | + ;; |
| 235 | +esac |
| 236 | + |
| 237 | +if [[ "$RELEASE_TYPE" == "major" && "$MAJOR_CONFIRMATION" != "$tag" ]]; then |
| 238 | + fail "Major releases require MAJOR_CONFIRMATION to exactly match '$tag'." |
| 239 | +fi |
| 240 | + |
| 241 | +ensure_tag_available "$tag" |
| 242 | + |
| 243 | +target_sha="$(git rev-parse --verify HEAD)" |
| 244 | +pushed="false" |
| 245 | + |
| 246 | +if ! is_true "$DRY_RUN"; then |
| 247 | + git tag -a "$tag" "$target_sha" -m "$tag" |
| 248 | + git push origin "$tag" |
| 249 | + pushed="true" |
| 250 | +fi |
| 251 | + |
| 252 | +echo "Latest stable tag: $latest_stable" |
| 253 | +echo "Computed tag: $tag" |
| 254 | +echo "Target SHA: $target_sha" |
| 255 | +echo "Dry run: $DRY_RUN" |
| 256 | +echo "Pushed: $pushed" |
| 257 | + |
| 258 | +write_outputs "$latest_stable" "$tag" "$prerelease_channel" "$target_sha" "$pushed" |
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