Improved flexibility

- tag convention is now configurable (previously the plugin assumed "v" prefix)
- the default development branch name can be anything, "master", "main", etc. Previously, it was hardcoded to "master".

Author: mockitoguy

README.md

@@ -126,6 +126,12 @@ You can read more about all [default env variables](https://docs.github.com/en/f
 Note that you can use *any* CI system, not necessarily Github Actions.
 Just refer to the documentation of your CI system to learn what are its default env variables.
 
+### Tag name convention
+
+By default the plugin assumes "v" prefix notation for tags, for example: "v1.0.0".
+To use a different tag notation, such as "release-1.0.0" or "1.0.0" use `releaseTag` property on the tasks.
+See reference examples.
+
 ## Customers / sample projects
 
 - https://github.com/shipkit/shipkit-demo (great example/reference project)
@@ -225,7 +231,10 @@ Complete task configuration
         revision = "HEAD" 
         
         //The release version, default as below
-        version = project.version             
+        version = project.version
+        
+        //Release tag, by default it is "v" + project.version
+        releaseTag = "v" + project.version
         
         //Repository to look for tickets, *no default*
         repository = "mockito/mockito"
@@ -281,7 +290,10 @@ Complete task configuration
         githubToken = System.getenv("GITHUB_TOKEN") // using env var to avoid checked-in secrets
         
         //SHA of the revision from which release is created; *no default*
-        newTagRevision = System.getenv("GITHUB_SHA")   // using an env var automatically exported by Github Actions        
+        newTagRevision = System.getenv("GITHUB_SHA")   // using an env var automatically exported by Github Actions
+
+        //Release tag, by default it is "v" + project.version
+        releaseTag = "v" + project.version
     }
 ``` 
 

src/integTest/groovy/org/shipkit/changelog/ChangelogPluginIntegTest.groovy

@@ -17,14 +17,25 @@ class ChangelogPluginIntegTest extends BaseSpecification {
                 id 'org.shipkit.shipkit-changelog'
             }
             
-            tasks.named("generateChangelog") {
+            version = "1.2.3"
+            
+            tasks.named("generateChangelog") {                
                 githubToken = "secret"
-                repository = "mockito/mockito"
+                repository = "org/repo"
+                date = "2022-01-01" // for reproducible assertion
             }
         """
 
-        expect: "run in dry-run mode to smoke test the configuration"
-        runner("generateChangelog", "-m").build()
+        when:
+        runner("generateChangelog").build()
+
+        then:
+        //since this is an edge case (no previous versions/tags) we're ok with oversimplified output with bad links
+        file("build/changelog.md").text == """<sup><sup>*Changelog generated by [Shipkit Changelog Gradle Plugin](https://github.com/shipkit/shipkit-changelog)*</sup></sup>
+
+#### 1.2.3
+ - 2022-01-01 - [0 commit(s)](https://github.com/org/repo/compare/@previousRev@...v1.2.3) by 
+ - No notable improvements. No pull requests (issues) were referenced from commits."""
     }
 
     def "complete task configuration"() {
@@ -56,13 +67,16 @@ class ChangelogPluginIntegTest extends BaseSpecification {
                 revision = "HEAD" 
                 
                 //The release version, default as below
-                version = project.version       
-                
+                version = project.version
+
+                //Release tag, by default it is "v" + project.version
+                releaseTag = "v" + project.version
+
                 //Token that enables querying Github, safe to check-in because it is read-only, *no default*              
                 githubToken = "a0a4c0f41c200f7c653323014d6a72a127764e17"
                 
                 //Repository to look for tickets, *no default*
-                repository = "mockito/mockito"
+                repository = "org/repo"
             }          
         """
 

src/integTest/groovy/org/shipkit/gh/release/GithubReleasePluginIntegTest.groovy

@@ -59,6 +59,9 @@ class GithubReleasePluginIntegTest extends BaseSpecification {
                 //SHA of the revision from which release is created; *no default*
                 newTagRevision = "ff2fb22b3bb2fb08164c126c0e2055d57dee441b"
                 
+                //Release tag, by default it is "v" + project.version
+                releaseTag = "v" + project.version
+                
                 //Github token used for posting to Github API, *no default*
                 githubToken = "secret"
             }

src/main/java/org/shipkit/changelog/ChangelogFormat.java

@@ -16,7 +16,7 @@ public class ChangelogFormat {
      * Builds the changelog String based on the input parameters.
      */
     public static String formatChangelog(Collection<String> contributors, Collection<Ticket> tickets, int commitCount,
-                                         final String version, final String previousRev,
+                                         final String releaseTag, final String version, final String previousRev,
                                          final String githubRepoUrl, final String date) {
         String template = "@header@\n" +
                 "\n" +
@@ -31,7 +31,7 @@ public static String formatChangelog(Collection<String> contributors, Collection
             put("commitCount", "" + commitCount);
             put("repoUrl", githubRepoUrl);
             put("previousRev", previousRev);
-            put("newRev", "v" + version);
+            put("newRev", releaseTag);
             put("contributors", String.join(", ", contributors));
             put("improvements", formatImprovements(tickets));
         }};

src/main/java/org/shipkit/changelog/ChangelogPlugin.java

@@ -21,6 +21,7 @@ public void apply(Project project) {
             t.setGithubUrl("https://github.com");
             t.setWorkingDir(project.getProjectDir());
             t.setVersion("" + project.getVersion());
+            t.setReleaseTag("v" + project.getVersion());
             t.getOutputs().upToDateWhen(Specs.satisfyNone()); //depends on state of Git repo, Github, etc.
         });
     }

src/main/java/org/shipkit/changelog/GenerateChangelogTask.java

@@ -25,6 +25,7 @@ public class GenerateChangelogTask extends DefaultTask {
     private String repository;
     private String previousRevision;
     private String version;
+    private String releaseTag;
     private String revision;
     private String date;
 
@@ -79,6 +80,22 @@ public void setVersion(String version) {
         this.version = version;
     }
 
+    /**
+     * Release tag, for example "v1.2.3".
+     * It is used to construct a GitHub link to a diff between previous revision and the new release tag.
+     */
+    @Input
+    public String getReleaseTag() {
+        return releaseTag;
+    }
+
+    /**
+     * See {@link #getReleaseTag()}
+     */
+    public void setReleaseTag(String releaseTag) {
+        this.releaseTag = releaseTag;
+    }
+
     /**
      * Target revision for changelog generation.
      * The changelog is generated between {@link #getPreviousRevision()} and {@code #getRevision()}.
@@ -171,25 +188,29 @@ public void setGithubToken(String githubToken) {
         ProcessRunner runner = new ProcessRunner(workingDir);
         GitLogProvider logProvider = new GitLogProvider(runner);
 
-        String previousRevision = this.previousRevision != null? this.previousRevision : "master";
-        LOG.lifecycle("Finding commits between {}..{} in dir: {}", previousRevision, revision, workingDir);
-        Collection<GitCommit> commits = new GitCommitProvider(logProvider).getCommits(previousRevision, revision);
-
-        LOG.lifecycle("Collecting ticket ids from {} commits.", commits.size());
-        List<String> ticketIds = new LinkedList<>();
+        Collection<GitCommit> commits = new LinkedList<>();
+        Collection<Ticket> improvements = new LinkedList<>();
         Set<String> contributors = new TreeSet<>();
-        for (GitCommit c : commits) {
-            ticketIds.addAll(c.getTickets());
-            contributors.add(c.getAuthor());
-        }
 
-        LOG.lifecycle("Fetching ticket info from {}/{} based on {} ids {}", githubApiUrl, repository, ticketIds.size(), ticketIds);
+        if (previousRevision != null) {
+            LOG.lifecycle("Finding commits between {}..{} in dir: {}", previousRevision, revision, workingDir);
+            commits = new GitCommitProvider(logProvider).getCommits(previousRevision, revision);
 
-        GithubTicketFetcher fetcher = new GithubTicketFetcher(githubApiUrl, repository, githubToken);
-        Collection<Ticket> improvements = fetcher.fetchTickets(ticketIds);
+            LOG.lifecycle("Collecting ticket ids from {} commits.", commits.size());
+            List<String> ticketIds = new LinkedList<>();
+            for (GitCommit c : commits) {
+                ticketIds.addAll(c.getTickets());
+                contributors.add(c.getAuthor());
+            }
+
+            LOG.lifecycle("Fetching ticket info from {}/{} based on {} ids {}", githubApiUrl, repository, ticketIds.size(), ticketIds);
+
+            GithubTicketFetcher fetcher = new GithubTicketFetcher(githubApiUrl, repository, githubToken);
+            improvements = fetcher.fetchTickets(ticketIds);
+        }
 
         LOG.lifecycle("Generating changelog based on {} tickets from Github", improvements.size());
-        String changelog = ChangelogFormat.formatChangelog(contributors, improvements, commits.size(), version,
+        String changelog = ChangelogFormat.formatChangelog(contributors, improvements, commits.size(), releaseTag, version,
                 previousRevision, githubUrl + "/" + repository, date);
 
         LOG.lifecycle("Saving changelog to file: {}", outputFile);

src/main/java/org/shipkit/github/release/GithubReleasePlugin.java

@@ -11,7 +11,7 @@ public class GithubReleasePlugin implements Plugin<Project> {
     public void apply(Project project) {
         project.getTasks().register("githubRelease", GithubReleaseTask.class, t -> {
             t.setGithubApiUrl("https://api.github.com");
-            String tagName = "v" + project.getVersion();
+            String tagName = "v" + project.getVersion();//
             t.setReleaseTag(tagName);
             t.setReleaseName(tagName);
         });

src/main/java/org/shipkit/github/release/GithubReleaseTask.java

@@ -54,11 +54,18 @@ public void setReleaseName(String releaseName) {
         this.releaseName = releaseName;
     }
 
+    /**
+     * Release tag, for example "v1.2.3".
+     * One of the parameters of the GitHub API call that creates GitHub release and the Git tag.
+     */
     @Input
     public String getReleaseTag() {
         return releaseTag;
     }
 
+    /**
+     * See {@link #getReleaseTag()}
+     */
     public void setReleaseTag(String releaseTag) {
         this.releaseTag = releaseTag;
     }

src/test/groovy/org/shipkit/changelog/ChangelogFormatTest.groovy

@@ -10,7 +10,7 @@ class ChangelogFormatTest extends Specification {
                 new Ticket(12, "improved feature", "https://github.com/myorg/myrepo/issues/12"),
         ]
         when:
-        def changelog = ChangelogFormat.formatChangelog(['mockitoguy', 'john'], improvements, 5,
+        def changelog = ChangelogFormat.formatChangelog(['mockitoguy', 'john'], improvements, 5, "v1.0.0",
                 "1.0.0", "v0.0.9", "https://github.com/myorg/myrepo",
                 "2020-01-01")
 
@@ -25,15 +25,15 @@ class ChangelogFormatTest extends Specification {
 
     def "no improvements"() {
         when:
-        def changelog = ChangelogFormat.formatChangelog(['mockitoguy'], [], 2,
-                "2.0.0", "v1.5.5", "https://github.com/myorg/myrepo",
+        def changelog = ChangelogFormat.formatChangelog(['mockitoguy'], [], 2, "2.0.0",
+                "2.0.0", "1.5.5", "https://github.com/myorg/myrepo",
                 "2020-01-01")
 
         then:
         changelog == """<sup><sup>*Changelog generated by [Shipkit Changelog Gradle Plugin](https://github.com/shipkit/shipkit-changelog)*</sup></sup>
 
 #### 2.0.0
- - 2020-01-01 - [2 commit(s)](https://github.com/myorg/myrepo/compare/v1.5.5...v2.0.0) by mockitoguy
+ - 2020-01-01 - [2 commit(s)](https://github.com/myorg/myrepo/compare/1.5.5...2.0.0) by mockitoguy
  - No notable improvements. No pull requests (issues) were referenced from commits."""
     }
 }