Initial commit

Author: holgerbrandl

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2017 Holger Brandl
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# kscript-support-api
+A support API written in Kotlin to simplify scripting with kscript

build.gradle

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+buildscript {
+    ext.kotlin_version = '1.1.2'
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+apply plugin: 'kotlin'
+apply plugin: 'application'
+apply plugin: 'maven'
+
+//mainClassName = 'demo.HelloWorldKt'
+mainClassName = "de.mpicbg.scicomp.kutils.BashKt" // not needed but does not work without
+
+defaultTasks 'run'
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+// https://docs.gradle.org/current/userguide/java_plugin.html#sec:java_plugin_and_dependency_management
+dependencies {
+//    compileOnly "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+
+    testRuntime 'junit:junit:4.11'
+    testRuntime "io.kotlintest:kotlintest:1.3.2"
+}
+
+
+// http://stackoverflow.com/questions/11474729/how-to-build-sources-jar-with-gradle
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+artifacts {
+    archives sourcesJar
+}
+
+// https://docs.gradle.org/current/userguide/maven_plugin.html
+uploadArchives {
+    repositories {
+        mavenDeployer {
+//            pom.groupId = 'de.mpicbg.scicomp'
+//            pom.version = '0.1-SNAPSHOT'
+            pom.artifactId = 'kscript'
+
+            repository(url: "file://localhost/tmp/myRepo/")
+        }
+    }
+}
+
+//http://stackoverflow.com/questions/34377367/why-is-gradle-install-replacing-my-version-with-unspecified
+group = 'kscript'
+version = '1.0-SNAPSHOT'

src/main/kotlin/kscript/StreamHelpers.kt

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+package kscript
+
+import java.io.File
+import kotlin.system.exitProcess
+
+
+// todo maybe  it should also become part of the kscript code repository once ready
+
+// for top-level vs member extensions see https://kotlinlang.org/docs/reference/extensions.html#scope-of-extensions
+//object KscriptHelpers {}
+
+val stdin = generateSequence() { readLine() }
+
+fun Sequence<String>.print() = forEach { println(it) }
+
+
+fun processStdin(trafo: (String) -> String) {
+    generateSequence() { readLine() }.map {
+        println(trafo(it))
+    }
+}
+
+@Deprecated("use mapLines instead")
+fun File.processLines(trafo: (String) -> String) {
+    useLines {
+        it.map { println(trafo(it)) }
+    }
+}
+
+fun <T> File.mapLines(trafo: (String) -> T) {
+    return useLines {
+        it.map { trafo(it) }
+    }
+}
+
+fun String.processLines(trafo: (String) -> String) {
+    split("\n").map { println(trafo(it)) }
+}
+
+
+public inline fun stopIfNot(value: Boolean, lazyMessage: () -> Any): Unit {
+    if (!value) {
+        System.err.println("ERROR: " + lazyMessage().toString())
+        exitProcess(1)
+    }
+}

src/test/kotlin/kscript/test/SupportApiTest.kt

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+package kscript.test
+
+import io.kotlintest.specs.FlatSpec
+import kscript.print
+import kscript.stdin
+
+/**
+ * @author Holger Brandl
+ */
+class SupportApiTest : FlatSpec() { init {
+
+    "it" should "allow to use stdin for filtering and mapping" {
+        val longDf = stdin.filter { "^de0[-0]*".toRegex().matches(it) }.map { it + "foo:" }.print()
+    }
+}
+}