Backend: Add Changelog Verification (#2692)

2 files changed, 80 insertions, 0 deletions

diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
new file mode 100644
index 000000000..505f438b9
--- /dev/null
+++ b/buildSrc/build.gradle.kts
@@ -0,0 +1,17 @@
+plugins {
+    `kotlin-dsl`
+}
+
+repositories {
+    mavenCentral()
+    maven("https://jitpack.io") {
+        content {
+            includeGroupByRegex("com\\.github\\..*")
+        }
+    }
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlin:kotlin-stdlib")
+    implementation("com.github.SkyHanniStudios:SkyHanniChangelogBuilder:1.0.1")
+}
diff --git a/buildSrc/src/main/kotlin/skyhannibuildsystem/ChangelogVerification.kt b/buildSrc/src/main/kotlin/skyhannibuildsystem/ChangelogVerification.kt
new file mode 100644
index 000000000..422a62cb1
--- /dev/null
+++ b/buildSrc/src/main/kotlin/skyhannibuildsystem/ChangelogVerification.kt
@@ -0,0 +1,63 @@
+package skyhannibuildsystem
+
+import at.hannibal2.changelog.SkyHanniChangelogBuilder
+import org.gradle.api.DefaultTask
+import org.gradle.api.GradleException
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.TaskAction
+import java.io.File
+
+abstract class ChangelogVerification : DefaultTask() {
+
+    @get:OutputDirectory
+    abstract val outputDirectory: DirectoryProperty
+
+    @Input
+    var prTitle: String = ""
+
+    @Input
+    var prBody: String = ""
+
+    @get:Internal
+    val prBodyLines get() = prBody.lines()
+
+    private val prLink = "ignored"
+    private val templateLocation = "https://github.com/hannibal002/SkyHanni/blob/beta/pull_request_template.md"
+
+    @TaskAction
+    fun scanChangelog() {
+        if (prBodyLines.contains("exclude_from_changelog")) {
+            println("PR is excluded from changelog verification")
+            return
+        }
+
+        val (changes, bodyErrors) = SkyHanniChangelogBuilder.findChanges(prBodyLines, prLink)
+        val titleErrors = SkyHanniChangelogBuilder.findPullRequestNameErrors(prTitle, changes)
+
+        if (bodyErrors.isEmpty() && titleErrors.isEmpty()) {
+            println("Changelog and title verification successful")
+        } else {
+            bodyErrors.forEach { println(it.message) }
+            titleErrors.forEach { println(it.message) }
+
+            // Export errors so that they can be listed in the PR comment
+            val errorFile = File(outputDirectory.get().asFile, "changelog_errors.txt")
+
+            errorFile.appendText("I have detected some issues with your pull request:\n\n")
+
+            if (bodyErrors.isNotEmpty()) {
+                errorFile.appendText("Body issues:\n${bodyErrors.joinToString("\n") { it.formatLine() }}\n\n")
+            }
+            if (titleErrors.isNotEmpty()) {
+                errorFile.appendText("Title issues:\n${titleErrors.joinToString("\n") { it.message }}\n\n")
+            }
+
+            errorFile.appendText("Please fix these issues. For the correct format, refer to the [pull request template]($templateLocation).")
+
+            throw GradleException("Changelog verification failed")
+        }
+    }
+}