Simplify Gradle build logic for making releases.

.github/workflows/publish.yml

@@ -1,18 +1,20 @@
 name: Publish package to GitHub Packages
 on:
   push:
-    branches:
+    tags:
       - '*-rc*'
 jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+        with:
+          fetch-tags: true
       - uses: actions/setup-java@v1
         with:
           java-version: 11
       - name: Publish package
-        run: ./gradlew publishAllPublicationsToGitHubPackagesRepository
+        run: ./gradlew publishAllPublicationsToGitHubPackagesRepository -PpublishVersion="$REFNAME"
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
+          REFNAME: ${{ github.ref_name }}

MAINTAINING.md

@@ -54,67 +54,59 @@ sonatypePassword=$token
 
 These are done more often, in irregular intervals. They are not considered stable and may break your application, so be cautious when using them.
 
-The process is equal to the making of a release candidate, but without making any tags:
+The process is identical to making a release candidate, but without making any tags:
 
-1. build and upload the `master-SNAPSHOT`:
+1. Switch to the `master` branch:
     ```
-    git pull; git checkout master;
+    git switch master
     ```
-1. proceed as described in [Release candidate - Upload to Sonatype](https://github.com/metafacture/metafacture-core/wiki/Maintainer-Guidelines#upload-to-sonatype)
+1. Proceed as described in [Release candidate - Upload to Sonatype](#upload-to-sonatype), but omit the `publishVersion` parameter in order to build and upload the `master-SNAPSHOT`.
 
 ## Release candidate
 
 *Release candidates should be tested by different people before releasing!*
 
 ### Prepare your release candidate
 
-1. Make an rc-branch (necessary for Gradle to pick up the proper name):
+1. Make an annotated signed tag for the release candidate (necessary for Gradle to pick up the proper name):
     ```
-    git checkout -b A.B.C-rcN
+    git tag -s metafacture-core-A.B.C-rcN
+    ```
+1. When prompted, add a sensible commit message. For instance, something like:
+    ```
+    Release candidate 5.7.0
     ```
-    (leave out the ` metafacture-core-` to avoid later the git "error: src refspec ... matches more than one" when you push the annotated git tag for having a tag named the same as the branch is not possible)
 1. Optionally, you can now test the build locally by invoking a Gradle target:
     ```
-    ./gradlew assemble
+    ./gradlew assemble -PpublishVersion=A.B.C-rcN
     ```
 
 ### Upload to Sonatype
 
-1. Now you can build and upload the release candidate to Sonatype (note that `./gradlew` should inform you to make a "snapshot build". If the version doesn't end with `-SNAPSHOT` the artifacts will not be uploaded to Sonatype's snapshot repository!):
-    ```
-    ./gradlew clean; ./gradlew publishToMavenLocal; ./gradlew publishToSonatype
-    ```
-1. Go to [Sonatype's snapshot repository](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture) and type in the correct `Version` to see if it is already available there (can take some minutes). [Example for `5.5.1-rc1-SNAPSHOT`](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture~~5.5.1*~~)(if you don't see a `5.5.1-rc1-SNAPSHOT.jar` there check it at https://oss.sonatype.org/content/repositories/snapshots/org/metafacture/metafacture-biblio/5.5.1-rc1-SNAPSHOT/).
-1. Make an annotated signed tag (it's important to do that _after_ uploading to Sonatype's snapshot repository because otherwise the `-SNAPSHOT` will not be appended to the release candidate thus will not land in `snapshot repository`):
+1. Make sure to have a *clean* Git directory (otherwise the build will fail with the error message `Working copy has modifications`):
     ```
-    git tag -s metafacture-core-A.B.C-rcN
+    git status
     ```
-1. Push the annotated signed tag to GitHub:
+1. Now you can build and upload the release candidate to Sonatype (note that `./gradlew` should inform you to make a "snapshot build". If the version doesn't end with `-SNAPSHOT` the artifacts will not be uploaded to Sonatype's snapshot repository!):
     ```
-    git push origin tag metafacture-core-A.B.C-rcN
+    ./gradlew publishToSonatype -PpublishVersion=A.B.C-rcN
     ```
+1. Go to [Sonatype's snapshot repository](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture) and type in the correct `Version` to see if it is already available there (can take some minutes). [Example for `5.5.1-rc1-SNAPSHOT`](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture~~5.5.1*~~)(if you don't see a `5.5.1-rc1-SNAPSHOT.jar` there check it at https://oss.sonatype.org/content/repositories/snapshots/org/metafacture/metafacture-biblio/5.5.1-rc1-SNAPSHOT/).
 
 ### Publish to [GitHub Packages](https://github.com/orgs/metafacture/packages?repo_name=metafacture-core)
 
-1. Push your properly named branch to GitHub. Notice the `-rc` part of the branch's name:
+1. Push the annotated signed tag to GitHub:
     ```
-    git push origin A.B.C-rcN
+    git push origin tag metafacture-core-A.B.C-rcN
     ```
-Because there is `fetch --no-tags` in `actions/checkout@v2` the `-SNAPSHOT` suffix will always be appended (in comparison to doing `./gradlew publishAllPublicationsToGitHubPackagesRepository` locally, which will find the `SCM tag`). The publishing to GitHub packages is triggered then.
-
-If we don't want `-SNAPSHOT` we may want to remove the `-SNAPSHOT` in `build.gradle`:
-```
-if (grgit.branch.current().name.contains('-rc')) { ...
-    return "${grgit.branch.current().name}-SNAPSHOT"
-}
-```
+The publishing to GitHub packages is triggered then via the GitHub Actions workflow.
 
 Note that `Packages` is not the same as [`Releases`](https://github.com/metafacture/metafacture-core/releases).
 
 ### Consume the SNAPSHOT
 
-1. See e.g. [Example for 5.5.1-rc1-SNAPSHOT](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture~~5.5.1*~~) how to configure the dependency.
-1. Configure your build system to use Sonatype's Snapshot Repository to be able to load the dependencies of the release candidate (or master-SNAPSHOT).
+1. See e.g. [5.5.1-rc1-SNAPSHOT](https://oss.sonatype.org/index.html#nexus-search;gav~org.metafacture~~5.5.1*~~) for how to configure the dependency.
+1. Configure your build system to use Sonatype's Snapshot Repository to be able to load the dependencies of the release candidate (or `master-SNAPSHOT`).
     For Maven update your `pom.xml` (after `</dependencies>`):
     ```xml
     <repositories>
@@ -149,43 +141,33 @@ Note that `Packages` is not the same as [`Releases`](https://github.com/metafact
 
 a) It's going from your local Git repository to Sonatype to Maven Central. Each station requires some manual actions so you can double check that everything is ok. b) A release should also be published to GitHub.
 
-1. Switch to `master` branch. Merge the approved `rc` into master:
-    ```
-    git switch master; pull --no-ff origin A.B.C-rcN; git push origin master
-    ```
-
-1. Make sure you have a signed tag locally:
+1. Ensure that the approved release candidate tag exactly matches `master` (should output `metafacture-core-A.B.C-rcN`):
     ```
-    git show metafacture-core-A.B.C
+    git switch master; git describe --tags --exact-match
     ```
-    If it doesn't exist yet, create it:
+1. Make an annotated signed tag for the release:
     ```
     git tag -s metafacture-core-A.B.C
     ```
 1. When prompted, add a sensible commit message. For instance, something like:
     ```
     Release 5.7.0
     ```
-1. Make sure you have that signed tag pushed to GitHub:
-    ```
-    git ls-remote --tags origin
-    ```
-    If it is missing, push it with:
+1. Push the annotated signed tag to GitHub:
     ```
-    git push origin  metafacture-core-A.B.C
+    git push origin metafacture-core-A.B.C
     ```
-1. Now the tag is available at GitHub. You can manually choose to [draft a new release on GitHub](https://github.com/metafacture/metafacture-core/releases/new). The signed `*dist*` files must be uploaded manually. They are produced like this:
+1. Make sure to have a *clean* Git directory (otherwise the build will fail with the error message `Working copy has modifications`):
     ```
-    ./gradlew metafacture-runner:signArchive
+    git status
     ```
-    and can be found in `metafacture-core/metafacture-runner/build/distributions/` (don't mind the `Source code` for that is created by GitHub automatically).
-1. Make sure to have a *clean* Git directory (otherwise only a SNAPSHOT will be built):
+1. Now the tag is available on GitHub. You can manually choose to [draft a new release on GitHub](https://github.com/metafacture/metafacture-core/releases/new). The signed `*-dist.*` files must be uploaded manually. They are produced like this:
     ```
-    git status
+    ./gradlew metafacture-runner:signArchive -PpublishVersion=A.B.C
     ```
-1. Let the release be built and uploaded (the SCM tag will be detected and the release be built):
+    and can be found in `metafacture-runner/build/distributions/` (don't mind the `Source code` for that is created by GitHub automatically).
+1. Now you can build and upload the release to Sonatype:
     ```
-    ./gradlew clean; ./gradlew publishToMavenLocal; ./gradlew publishToSonatype
+    ./gradlew publishToSonatype -PpublishVersion=A.B.C
     ```
-1. Finally, go to [oss.sonatype.org](https://oss.sonatype.org), log in, check the [Staging Repositories](https://oss.sonatype.org/#stagingRepositories) and when it's finished, click on `Close`. If everything is good publish with clicking on `Release` - attention, because once published it can't be removed. The artifacts are uploaded to Maven Central (which may take some time. Have a look e.g. [metafacture-biblio](https://repo1.maven.org/maven2/org/metafacture/metafacture-biblio/) ). You can check that it's actually in the publishing pipeline by clicking on `Views/Repositories->Releases`, then type in the `Path lookup` field `org/metafacture/` and click on version.
-
+1. Finally, go to [oss.sonatype.org](https://oss.sonatype.org), log in, check the [Staging Repositories](https://oss.sonatype.org/#stagingRepositories) and when it's finished, click on `Close`. If everything is good, publish with clicking on `Release` - attention, because once published it can't be removed. The artifacts are uploaded to Maven Central (which may take some time; have a look at e.g. [metafacture-biblio](https://repo1.maven.org/maven2/org/metafacture/metafacture-biblio/)). You can check that it's actually in the publishing pipeline by clicking on `Views/Repositories->Releases`, then type in the `Path lookup` field `org/metafacture/` and click on version.

build.gradle

@@ -63,6 +63,7 @@ subprojects {
 }
 
 ext.scmInfo = getScmInfo()
+logger.lifecycle("Making ${scmInfo.type()} build: ${scmInfo.version}")
 
 allprojects {
   group = 'org.metafacture'
@@ -270,7 +271,7 @@ subprojects {
           password = System.getenv("GITHUB_TOKEN")
         }
       }
-      if (scmInfo.isRelease() && project.hasProperty('releaseRepositoryUrl')) {
+      if (scmInfo.isRelease && project.hasProperty('releaseRepositoryUrl')) {
         maven {
           url = releaseRepositoryUrl
           credentials {
@@ -284,7 +285,7 @@ subprojects {
 
   signing {
     required {
-      scmInfo.isRelease()
+      scmInfo.isRelease
     }
     sign publishing.publications.mavenArtifacts
   }
@@ -310,114 +311,60 @@ nexusPublishing {
 class ScmInfo {
   def version
   def tag
+  def isRelease
+
+  ScmInfo(version, tag, isRelease) {
+    if (!isRelease) version += '-SNAPSHOT'
 
-  ScmInfo(version, tag) {
     this.version = version
     this.tag = tag
+    this.isRelease = isRelease
   }
 
-  def isRelease() {
-    return tag != null
+  def type() {
+    return isRelease ? 'release' : tag != null ? 'release candidate' : 'snapshot'
   }
 }
 
 def getScmInfo() {
-  def tag = getGitTag()
-  if (tag != null) {
-    logger.lifecycle('SCM tag found. Making a release build')
-    version = extractVersionFromTag(tag)
-  } else {
-    logger.lifecycle('No SCM tag found. Making a snapshot build')
-    version = getSnapshotVersion()
-  }
-  logger.lifecycle("Version is $version")
-  return new ScmInfo(version, tag)
-}
+  def version = null
+  def tag = null
+  def isRelease = false
 
-def getSnapshotVersion() {
-  if (grgit == null) {
-    logger.warn('No Git repository found')
-    return 'non-scm-build-SNAPSHOT'
-  }
-  if (grgit.branch.current().fullName == 'HEAD') {
-    logger.lifecycle('Detached HEAD found')
-    return "commit-${grgit.head().id}-SNAPSHOT"
-  }
-  if (grgit.branch.current().name == 'master') {
-    logger.lifecycle('On master branch')
-    return 'master-SNAPSHOT'
-  }
-  if (grgit.branch.current().name.startsWith('releases/')) {
-    logger.lifecycle('Release branch found')
-    return "${extractVersionFromBranch(grgit.branch.current().name)}-SNAPSHOT"
+  if (project.hasProperty('publishVersion')) {
+    version = publishVersion
+
+    def matcher = version =~ /\d+(?:\.\d+)+(-rc\d+)?/
+    if (matcher.matches()) {
+      tag = getGitTag(version)
+      isRelease = matcher.group(1) == null
+    }
   }
-  if (grgit.branch.current().name.contains('-rc')) {
-    logger.lifecycle('Release candidate branch found')
-    return "${grgit.branch.current().name}-SNAPSHOT"
+  else {
+    version = grgit != null ? grgit.branch.current().name : rootProject.name
   }
-  logger.lifecycle('Feature branch found')
-  return "feature-${grgit.branch.current().name}-SNAPSHOT"
+
+  return new ScmInfo(version, tag, isRelease)
 }
 
-def getGitTag() {
+def getGitTag(version) {
   if (grgit == null) {
-    logger.warn('No Git repository found')
-    return null
+    throw new GradleException('No Git repository found')
   }
   if (!grgit.status().isClean()) {
-    logger.warn('Working copy has modifications. Will not look for tags')
-    return null
-  }
-  def tags = getAnnotatedTags()
-  if (tags.isEmpty()) {
-    logger.lifecycle('HEAD has no annotated tags')
-    return null
-  }
-  if (tags.size() > 1) {
-    logger.warn("HEAD has ${tags.size()} annotated tags")
-    return null
+    throw new GradleException('Working copy has modifications')
   }
-  def tag = tags[0]
-  logger.lifecycle("Found annotated tag $tag.name")
-  return tag.name
-}
 
-def getAnnotatedTags() {
-  def tags = []
+  def tagName = "${rootProject.name}-$version"
   for (tag in grgit.tag.list()) {
-    if (tag.commit == grgit.head()
-        && tag.tagger != null
-        && tag.dateTime != null) {
-      tags.add tag
+    if (
+      tag.name == tagName && // matching name
+      tag.commit == grgit.head() && // pointing at HEAD
+      tag.tagger != null && tag.dateTime != null // annotated
+    ) {
+      return tagName
     }
   }
-  return tags
-}
 
-def static extractVersionFromTag(tag) {
-  Matcher matcher =
-      tag =~ /metafacture-core-(\d+\.\d+\.\d+(-[-A-Za-z0-9]+)?)/
-  if (!matcher.matches()) {
-    throw new GradleException("""\
-        Unsupported tag format: $tag
-        Could not extract version from tag. Supported tag formats are
-            metafacture-core-X.Y.Z and
-            metafacture-core-X.Y.Z-QUALIFIER
-        """.stripIndent())
-  }
-  return matcher.group(1)
-}
-
-def static extractVersionFromBranch(branch) {
-  Matcher matcher =
-      branch =~ /releases\/metafacture-core-(\d+\.\d+\.\d+(-[-A-Za-z0-9]+)?)/
-  if (!matcher.matches()) {
-    throw new GradleException("""\
-        Unsupported branch format: $branch
-        Could not extract version from branch. Supported branch formats are
-            releases/metafacture-core-X.Y.Z and
-            releases/metafacture-core-X.Y.Z-QUALIFIER
-        """.stripIndent())
-  }
-  return matcher.group(1)
+  throw new GradleException("HEAD has no matching annotated tag: $tagName")
 }