clean up gradle

buildSrc/src/main/kotlin/com/dfsek/terra/Utils.kt

@@ -0,0 +1,49 @@
+package com.dfsek.terra
+
+import org.gradle.api.Action
+import org.gradle.api.Project
+import java.io.ByteArrayOutputStream
+
+
+var isPrerelease = false
+
+
+fun Project.getGitHash(): String {
+    val stdout = ByteArrayOutputStream()
+    exec {
+        commandLine = mutableListOf("git", "rev-parse", "--short", "HEAD")
+        standardOutput = stdout
+    }
+    return stdout.toString().trim()
+}
+
+fun Project.gitClone(name: String) {
+    val stdout = ByteArrayOutputStream()
+    exec {
+        commandLine = mutableListOf("git", "clone", name)
+        standardOutput = stdout
+    }
+}
+
+fun Project.forSubProjects(project: String, action: Action<Project>) {
+    project(project).subprojects.forEach {
+        action.execute(it)
+    }
+}
+
+fun preRelease(preRelease: Boolean) {
+    isPrerelease = preRelease
+}
+
+fun Project.versionProjects(project: String, version: String) {
+    forSubProjects(project) {
+        this.version = version
+    }
+}
+
+fun Project.version(version: String): String {
+    return if (!isPrerelease)
+        version
+    else //Only use git hash if it's a prerelease.
+        "$version-BETA+${getGitHash()}"
+}