feat: added test that empty string in requireBranch acts as a wildcard

Author: Hillkorn

README.md

@@ -160,7 +160,7 @@ Below are some properties of the Release Plugin Convention that are specific to
 		<td>Git</td>
 		<td>requireBranch</td>
 		<td>main</td>
-		<td>Defines the branch which releases must be done off of. Eg. set to `release` to require releases are done on the `release` branch (or use a regular expression to allow releases from multiple branches, e.g. `/release|main/`). Set to null to ignore.</td>
+		<td>Defines the branch which releases must be done off of. Eg. set to `release` to require releases are done on the `release` branch (or use a regular expression to allow releases from multiple branches, e.g. `/release|main/`). Set to empty string "" to ignore.</td>
 	</tr>
 	<tr>
 		<td>Git</td>

src/main/groovy/net/researchgate/release/GitAdapter.groovy

@@ -88,7 +88,7 @@ class GitAdapter extends BaseScmAdapter {
         } else {
             releaseBranch = workingBranch
         }
-        if (extension.git.requireBranch.isPresent() && extension.git.requireBranch.get()) {
+        if (extension.git.requireBranch.isPresent() && !extension.git.requireBranch.get().isEmpty()) {
             if (!(workingBranch ==~ extension.git.requireBranch.get())) {
                 throw new GradleException("Current Git branch is \"$workingBranch\" and not \"${ extension.git.requireBranch.get() }\".")
             }

src/test/groovy/net/researchgate/release/GitReleasePluginTests.groovy

@@ -12,6 +12,7 @@ package net.researchgate.release
 
 import net.researchgate.release.cli.Executor
 import net.researchgate.release.tasks.CommitNewVersion
+import net.researchgate.release.tasks.InitScmAdapter
 import org.gradle.api.GradleException
 import org.gradle.api.Project
 import org.gradle.api.plugins.BasePlugin
@@ -131,4 +132,18 @@ class GitReleasePluginTests extends Specification {
         then:
         newestCommit.contains("Signed-off-by: Unit Test <unit@test>")
     }
+
+    def 'accept empty string to ignore requireBranch'() {
+        given:
+        executor.exec(['git', 'checkout', '-B', 'myBranch'], failOnStderr: false, directory: localRepo, env: [:])
+        when:
+        project.release {
+            git {
+                requireBranch.set('')
+            }
+        }
+        (project.tasks.initScmAdapter as InitScmAdapter).initScmAdapter()
+        then:
+        (project.tasks.initScmAdapter as InitScmAdapter).getScmAdapter().class.equals(GitAdapter.class)
+    }
 }