Version generation and bumping for GitHub Actions

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A GitHub action for reading, bumping, generating, formatting applications versions in release pipelines. Outputs four environment / output variables:

• 'env.CURRENT_VERSION' - a current, extracted version of application without any changes
• 'env.RELEASE_VERSION' - a generated release version with SNAPSHOT suffix removed by default
• 'env.NEXT_VERSION' - a new version supposed to put into version source file instead of CURRENT_VERSION
• 'env.NEXT_RELEASE_VERSION' - the same new version with SNAPSHOT suffix removed by default

Also, there are 5 postfixes for environment variables listed above:

• '_MAJOR'
• '_MINOR'
• '_PATCH'
• '_PRERELEASE'
• '_BUILDMETADATA'

They contain corresponding version fragments, so for release version 5.0.3 environment / output variable RELEASE_VERSION_PATCH will contain 3.

The action uses so-called "Semantic version" system, please check out the specification first to avoid misunderstanding and misuses.

By default, the action increments prerelease version. Basically it picks a number in a substring starting with alpha|beta|rc + a number. It also possible to notate all caps or starting with a capital letter (ALPHA, alpha and Alpha are OK).

E.G.:

• TESTNG7-BETA-7-SNAPSHOT → TESTNG7-BETA-8-SNAPSHOT
• rc1 → rc2
• TESTNG6-Alpha1 → Alpha2

Here are some prerelease fragments and a regex which is used to extract the prerelease number: https://regex101.com/r/O5GUdN/2

If there is no regex match in prerelease section the patch version fragment will be incremented. You can force action increment a specific version fragment you like by configuring Next version parameters. If any of such parameters was specified the default behavior will be ignored.

Usage

To use the action introduce it into your job steps of a github actions workflow.

Example 1: Java application built with gradle

A pretty simple pipeline which launches a release task. To update development version back in a release branch Gradle release plugin needs at least one parameter specified (release.newVersion). This pipeline provides gradle both necessary versions: which to release and which to commit back into the release branch.

name: Release

on:
  push:
    branches:
      - 'master'

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set up JDK 1.8
        uses: actions/setup-java@v3
        with:
          distribution: 'temurin'
          java-version: '8'

      - name: Generate versions
        uses: HardNorth/github-version-generate@v1.4.0
        with:
          version-source: file
          version-file: gradle.properties
          version-file-extraction-pattern: '(?<=version=).+'

      - name: Grant execute permission for gradlew
        run: chmod +x gradlew

      - name: Release with Gradle
        id: release
        run: |
          ./gradlew release -Prelease.useAutomaticVersion=true \
          -Prelease.releaseVersion=${{ env.RELEASE_VERSION }} \
          -Prelease.newVersion=${{ env.NEXT_VERSION }}

Example 2: A specific version fragment incrementation

The pipeline demonstrates how you can control which version fragment to increment by a file with a specific keyword:

name: release

on:
  push:
    branches:
      - master

env:
  VERSION_FILE_NAME: 'VERSION'
  VERSION_BUMP_FILE: 'version_fragment'
jobs:
  calculate-version:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Get version fragment to bump
        id: getVersionFragment
        run: |
          read -r versionFragment < ${{ env.VERSION_BUMP_FILE }}
          echo "'$versionFragment' version will be incremented"
          echo "::set-env name=VERSION_FRAGMENT::${versionFragment}"

      - name: Generate versions
        uses: HardNorth/github-version-generate@v1.4.0
        with:
          version-source: file
          version-file: ${{ env.VERSION_FILE_NAME }}
          next-version-increment-patch: ${{ contains(env.VERSION_FRAGMENT, 'patch') }}
          next-version-increment-minor: ${{ contains(env.VERSION_FRAGMENT, 'minor') }}
          next-version-increment-major: ${{ contains(env.VERSION_FRAGMENT, 'major') }}

If the content of the version_fragment file will be "minor" then minor version will be incremented respectively.

Configuration

Version sources

Parameter	Type	Default value	Description
version-source	enum{file, variable}	variable	A source of a CURRENT_VERSION
version	string		A version variable for version source
version-file	string		A path to a file which holds a version
version-file-extraction-pattern	string	.+	A RegEx to extract version from a version-source file. Should either match a full version, or return it as the first group. E.G: (?<=version=).+ - pattern match, e.g: 'version=5.0.3-SNAPSHOT' will extract matched string '5.0.3-SNAPSHOT' "version":\s*"([^"]+)" - group match, will extract the first group. e.g: '"version": "1.0.0",' to '1.0.0' In case if there are several groups in a pattern the first group will be extracted.

Release version

Parameter	Type	Default value	Description
release-version-cut-snapshot	boolean	true	Remove "SNAPSHOT" suffix from source version
release-version-cut-build-metadata	boolean	true	Remove build metadata suffix from source version
release-version-cut-prerelease	boolean	false	Remove prerelease part from source version
release-version-generate-build-metadata	boolean	false	Put build metadata (release date, commit sha, etc.) into result RELEASE_VERSION
release-version-build-metadata-pattern	string	build.{date}.{hash}	Format pattern for build metadata. EG: build.{date[YYYY-MM-dd]}.{hash[0, 6]}. It is also possible not to customize variable outputs omitting square braces ([]) or even not to use any variables. Supported variables: date[date_format]: a current date in UTC or time set in 'release-version-build-metadata-datetime' variable. Supports formatting included in square braces ([]). The date format will be applied by "Moment.js". Default format is ['YYYY-MM-DD']. Library: https://momentjs.com/ hash[begin_index_inclusive, end_index_exclusive]: a commit hash, which triggered this build. You can shorten the hash by specifying begin and end characters indexes included in square braces ([]), separated by a comma. Default begin, end values are: [0, 8].
release-version-build-metadata-datetime	string		A time stamp in ISO format to put into a build metadata string, by default the action uses current time in UTC timezone

Next version

Parameter	Type	Default value	Description
next-version-increment-major	boolean	false	Increment major version in result NEXT_VERSION, resets all other versions to "0" and prerelease to "1" if found. E.G.: 5.0.3-BETA-3 → 6.0.0-BETA-1
next-version-increment-minor	boolean	false	Increment minor version in result NEXT_VERSION, resets patch to "0" and prerelease to "1" if found. E.G.: 5.0.3-BETA-3 → 5.1.0-BETA-1
next-version-increment-patch	boolean	false	Increment patch version in result NEXT_VERSION, resets prerelease to "1" if found. E.G.: 5.0.3-BETA-3 → 5.0.4-BETA-1
next-version-increment-prerelease	boolean	false	Increment prerelease version in result NEXT_VERSION. E.G.: 5.0.3-BETA-3 → 5.0.3-BETA-4
next-version-cut-prerelease	boolean	false	Remove prerelease part from source version. In case this parameter is set the action increments patch version by default.
next-version-cut-build-metadata	boolean	true	Remove build metadata suffix from source version
next-version-put-build-metadata	boolean	false	Put build metadata (release date, commit sha, etc.) into result NEXT_VERSION. Will be the same as for RELEASE_VERSION'

Data extract

Built-in data extraction mechanism.

Example:

data-extract: true
data-extract-name: 'first_variable'
data-extract-paths: '/path/to/file'
data-extract-patterns: '/(?<=variable.name=).+/i'

There are several use cases depending on RegEx format and flags:

• RegEx Match only - As on example, above. Variable name in 'data-extract-name' parameter will be used 'as is', variable value will be set on matched text. Extraction will fail if 'data-extract-name' is not set.
• One group - Variable name in 'data-extract-name' parameter will be used 'as is', variable value will be set on group value. Extraction will fail if 'data-extract-name' is not set.
• Two or more groups - If 'data-extract-name' value is set then the first group will be used as value, and other groups will be ignored, if it's not set, then the first group will used as variable name and the second group will be used as value.
• Multiple match (multiple RegEx, 'g' flag in RegEx is set, etc) - If 'data-extract-name' value is set the action will extract all RegEx matches and export variables with underscore and variable index as suffix, except the first one. E.G.: first_variable -> FIRST_VARIABLE, FIRST_VARIABLE_1, etc; If 'data-extract-name' value is not set then two groups in every RegEx is a requirement, the first group will used as variable name and the second group will be used as value. If multiple files have the same variable names, output values will be overwritten with the latter matches.

Variable name convert rules:

• Spaces and symbols '-', even multiple in a row, will be converted to single symbol '_';
• Other special characters except digits and letters will be cut off;
• The variable name will be converted to upper case.

Parameter	Type	Default value	Description
data-extract	boolean	false	Enable data extraction mechanism
data-extract-name	string	null	Variable name to which extracted data will be placed, standard variable name conversion rules are also applied to this field. If not set it will be extracted from RegEx groups. See usage use cases above.
data-extract-paths	string	null	Semicolon (";") separated path list of files which to use to extract data
data-extract-patterns	string	null	Semicolon (";") separated RegEx pattern list wrapped with "/" symbols, with flags

Real-life examples

• The action builds using itself, check out Release pipeline.
• Report Portal uses the action to build its agents. E.G.: JUnit

License

Apache License Version 2.0 - repo link.

Credits

The action was created by Vadzim Hushchanskou at HardNorth/github-version-generate