Auto-increment version from script

This allows to have own version system on particular branch. It's planned to be enabled in release branches.

generators/infrastructure/increment-version.kts

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.File
+
+/**
+ * Icrements last segement of version string: 0.12.1223 -> 0.12.1224 and writes result to file.
+ */
+fun main(args: Array<String>) {
+    val filePathDefault = "updated-version.txt"
+
+    if (args.isEmpty() || args.size() > 2) {
+        error("Usage: kotlinc -script increment-version.kts " +
+              "<version> " +
+              "<file-path='$filePathDefault'>")
+    }
+
+    var versionStr = args[0]
+
+    val incrementPartStr = versionStr.takeLastWhile { it.isDigit() }
+    val versionPrefix = versionStr.take(versionStr.length() - incrementPartStr.length())
+    val incrementPart = incrementPartStr.toInt()
+
+    var filePath = args.getOrNull(1) ?: filePathDefault
+
+    val result = "${versionPrefix}${incrementPart + 1}"
+
+    println("prefix=$versionPrefix incrementPart=$incrementPart result=$result filePath=$filePath")
+
+    File("$filePath").writeText("$result")
+}
+
+main(args)