Changelog generation

.gitignore

@@ -3,6 +3,10 @@
 # eclipse
 /eclipse
 
+# idea
+.idea
+*.iml
+
 # gradle
 build
 .gradle

build.gradle

@@ -1,4 +1,5 @@
 import groovy.json.JsonSlurper
+import kcauldron.CreateChangelog
 
 buildscript {
     repositories {
@@ -47,26 +48,48 @@ minecraft {
 
 group = 'pw.prok'
 
-def retrieveBuildNumber() {
-	if (!project.hasProperty('officialBuild')) return 'UNOFFICIAL.' + retrieveGitHash(false)
-	new JsonSlurper().parse(new URL("https://prok.pw/version/${group}/${name}"))['nextBuildNumber']
+ext.buildInfoCached = null;
+
+def buildInfo(String key) {
+    if (!buildInfoCached) {
+        if (project.hasProperty('officialBuild')) {
+            buildInfoCached = new JsonSlurper().parse(new URL("https://prok.pw/version/${group}/${name}"))
+        } else {
+            buildInfoCached = [
+                    nextBuildNumber: 'UNOFFICIAL.' + gitInfo('hash'),
+                    version        : 'NONE'
+            ]
+        }
+    }
+    return key ? buildInfoCached[key] : buildInfoCached;
 }
 
-def retrieveGitHash(full = true) {
-	if (file('.git').exists())
-		return ['git', 'log', "--format=%${full?'H':'h'}", '-n', '1'].execute().text.trim()
-	return 'NOTGIT'
-}
+ext.gitInfoCached = null;
 
-def retrieveGitBranch() {
-	if (file('.git').exists())
-		return ['git', 'symbolic-ref', '--short', 'HEAD'].execute().text.trim();
-	return 'NOTGIT'
+def gitInfo(String key) {
+    if (!gitInfoCached) {
+        if (file('.git').exists()) {
+            gitInfoCached = [
+                    hash    : ['git', 'log', "--format=%h", '-n', '1'].execute().text.trim(),
+                    fullHash: ['git', 'log', "--format=%H", '-n', '1'].execute().text.trim(),
+                    branch  : ['git', 'symbolic-ref', '--short', 'HEAD'].execute().text.trim(),
+                    message : ['git', 'log', "--format=%B", '-n', '1'].execute().text.trim()
+            ]
+        } else {
+            gitInfoCached = [
+                    hash    : 'NOT_A_GIT',
+                    fullHash: 'NOT_A_GIT',
+                    branch  : 'NOT_A_GIT',
+                    message : 'NOT_A_GIT'
+            ]
+        }
+    }
+    return key ? gitInfoCached[key] : gitInfoCached;
 }
 
 ext.mcVersion = "1.7.10"
 ext.forgeVersion = "1420"
-ext.revision = retrieveBuildNumber()
+ext.revision = buildInfo('nextBuildNumber')
 version = "${mcVersion}-${forgeVersion}.${revision}"
 println "Updated KCauldron version: ${version}"
 
@@ -77,12 +100,12 @@ launch4j {
 tasks.packageUniversal {
     classifier = 'server'
     manifest.attributes([
-	'KCauldron-Git-Branch': retrieveGitBranch(),
-        'KCauldron-Git-Hash': retrieveGitHash(),
+            'KCauldron-Git-Branch'  : gitInfo('branch'),
+            'KCauldron-Git-Hash'    : gitInfo('fullHash'),
             'KCauldron-Version'     : project.version,
             'Implementation-Vendor' : 'Prototik',
-        'Implementationk-Title': 'KCauldron',
-        'Implementation-Version': 'KCauldron-'+project.version,
+            'Implementation-Title'  : 'KCauldron',
+            'Implementation-Version': project.version,
             'Forge-Version'         : '10.13.3.1420',
             'Specification-Vendor'  : 'Bukkit Team',
             'Specification-Title'   : 'Bukkit',
@@ -92,9 +115,20 @@ tasks.packageUniversal {
 
 tasks.createChangelog.onlyIf { false }
 
+task packageChangelog(type: CreateChangelog) {
+    onlyIf { project.hasProperty('officialBuild') }
+    classifier = 'changelog'
+    extension = 'txt'
+    oldChangelogUrl = "https://prok.pw/repo/${project.group.replace('.','/')}/${project.name}/${buildInfo('version')}/${project.name}-${buildInfo('version')}-changelog.txt"
+    hash = gitInfo('hash')
+    message = gitInfo('message')
+    version = project.version
+}
+
 task signJars(type: Sign, dependsOn: [packageUniversal, packageInstaller]) {
     sign packageInstaller
     sign packageUniversal
+    sign packageChangelog
 }
 
 task preparePublication(dependsOn: signJars) {}
@@ -103,9 +137,11 @@ def getSignatureFiles = {
     def allFiles = project.tasks.signJars.signatureFiles.collect { it }
     def signedServer = allFiles.find { it.name.contains('-server') }
     def signedInstaller = allFiles.find { it.name.contains('-installer') }
+    def signedChangelog = allFiles.find { it.name.contains('-changelog') }
     return [
             [archive: signedServer, classifier: 'server', extension: 'jar.asc'],
-            [archive: signedInstaller, classifier: 'installer', extension: 'jar.asc']
+            [archive: signedInstaller, classifier: 'installer', extension: 'jar.asc'],
+            [archive: signedChangelog, classifier: 'changelog', extension: 'txt.asc']
     ]
 }
 
@@ -122,17 +158,16 @@ publishing {
     }
 
     publications {
-        gpg(MavenPublication) {
+        maven(MavenPublication) {
             getSignatureFiles().each { signature ->
                 artifact(signature.archive) {
                     classifier = signature.classifier
                     extension = signature.extension
                 }
             }
-        }
-        jar(MavenPublication) {
             artifact packageUniversal
             artifact packageInstaller
+            artifact packageChangelog
         }
     }
 }

buildSrc/build.gradle

@@ -0,0 +1,7 @@
+apply plugin: 'groovy'
+
+dependencies {
+    compile gradleApi()
+    compile localGroovy()
+}
+

buildSrc/src/main/groovy/kcauldron/CreateChangelog.groovy

@@ -0,0 +1,59 @@
+package kcauldron
+
+import org.gradle.api.GradleException
+import org.gradle.api.GradleScriptException
+import org.gradle.api.file.FileCollection
+import org.gradle.api.internal.file.copy.CopyAction
+import org.gradle.api.internal.file.copy.CopyActionProcessingStream
+import org.gradle.api.internal.tasks.SimpleWorkResult
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.SkipWhenEmpty
+import org.gradle.api.tasks.WorkResult
+import org.gradle.api.tasks.bundling.AbstractArchiveTask
+
+public class CreateChangelog extends AbstractArchiveTask {
+    @Input
+    def String oldChangelogUrl
+    @Input
+    def String hash
+    @Input
+    def String message
+    @Input
+    def String version
+    @Input
+    def String format = "# <version>: <hash>\n<message>\n\n"
+
+    @Override
+    FileCollection getSource() {
+        return project.files(project.buildDir)
+    }
+
+    @Override
+    protected CopyAction createCopyAction() {
+        return new CopyAction() {
+            @Override
+            WorkResult execute(CopyActionProcessingStream stream) {
+                def oldChangelog;
+                try {
+                    oldChangelog = new URL(oldChangelogUrl).text.trim();
+                } catch (Exception e) {
+                    if (!project.hasProperty('ignoreOldChangelog'))
+                        throw new GradleException('Error occurred during fetching latest log', e)
+                    oldChangelog = ''
+                    e.printStackTrace();
+                }
+                try {
+                    def newMessage = '';
+                    message.eachLine { newMessage += '   ' + it + '\n' }
+                    def append = format.replace('<version>', version).replace('<hash>', hash).replace('<message>', message)
+                    def changelog = append + oldChangelog;
+                    archivePath.write(changelog.trim(), 'utf-8')
+                    return new SimpleWorkResult(true);
+                } catch(Exception e) {
+                    e.printStackTrace();
+                    return new SimpleWorkResult(false);
+                }
+            }
+        }
+    }
+}