com.twineworks.tweakflow.run.Run Maven / Gradle / Ivy
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Embeddable expression language for Java.
/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Twineworks GmbH
*
* 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.
*/
package com.twineworks.tweakflow.run;
import com.twineworks.tweakflow.lang.TweakFlow;
import com.twineworks.tweakflow.lang.ast.expressions.ExpressionNode;
import com.twineworks.tweakflow.lang.ast.expressions.ReferenceNode;
import com.twineworks.tweakflow.lang.errors.LangException;
import com.twineworks.tweakflow.lang.interpreter.SimpleDebugHandler;
import com.twineworks.tweakflow.lang.interpreter.Interpreter;
import com.twineworks.tweakflow.lang.load.loadpath.FilesystemLocation;
import com.twineworks.tweakflow.lang.load.loadpath.LoadPath;
import com.twineworks.tweakflow.lang.load.loadpath.MemoryLocation;
import com.twineworks.tweakflow.lang.load.loadpath.ResourceLocation;
import com.twineworks.tweakflow.lang.parse.ParseResult;
import com.twineworks.tweakflow.lang.parse.Parser;
import com.twineworks.tweakflow.lang.parse.units.ParseUnit;
import com.twineworks.tweakflow.lang.runtime.Runtime;
import com.twineworks.tweakflow.lang.types.Types;
import com.twineworks.tweakflow.lang.values.Value;
import com.twineworks.tweakflow.lang.values.ValueInspector;
import com.twineworks.tweakflow.lang.values.Values;
import net.sourceforge.argparse4j.ArgumentParsers;
import net.sourceforge.argparse4j.impl.Arguments;
import net.sourceforge.argparse4j.inf.ArgumentParser;
import net.sourceforge.argparse4j.inf.ArgumentParserException;
import net.sourceforge.argparse4j.inf.Namespace;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class Run {
public static class StringArg {
public final String str;
public StringArg(String str) {
this.str = str;
}
public static StringArg valueOf(String str){
return new StringArg(str);
}
}
public static class EvalArg {
public final String str;
public EvalArg(String str) {
this.str = str;
}
public static EvalArg valueOf(String str){
return new EvalArg(str);
}
}
private static ArgumentParser createMainArgumentParser(){
ArgumentParser parser = ArgumentParsers.newFor("run").build();
parser.addArgument("-I", "--load-path")
.required(false)
.type(String.class)
.setDefault(new ArrayList())
.action(Arguments.append());
parser.addArgument("-R", "--resource-load-path")
.required(false)
.type(String.class)
.setDefault(new ArrayList())
.action(Arguments.append());
parser.addArgument("--escape-result")
.setDefault(Boolean.FALSE)
.action(Arguments.storeTrue())
.type(Boolean.class);
parser.addArgument("-m", "--main")
.setDefault("main.main")
.type(String.class);
parser.addArgument("-a", "--arg")
.required(false)
.dest("arg")
.type(StringArg.class)
.action(Arguments.append());
parser.addArgument("-ea", "--eval-arg")
.required(false)
.dest("arg")
.type(EvalArg.class)
.action(Arguments.append());
parser.addArgument("module")
.type(String.class)
.nargs("+");
return parser;
}
private static String[] parseMain(String main){
// get main
ParseUnit parseUnit = new MemoryLocation.Builder().add("main", main).build().getParseUnit("main");
ParseResult parseResult = new Parser(parseUnit).parseReference();
if (parseResult.isError()){
System.err.println("syntax error! invalid main "+main);
System.exit(1);
}
ReferenceNode ref = (ReferenceNode) parseResult.getNode();
if (ref.getElements().size() != 2 || ref.getAnchor() != ReferenceNode.Anchor.LOCAL){
System.err.println("syntax error! main must be of the form: lib.var "+main);
System.exit(1);
}
return new String[]{ref.getElements().get(0), ref.getElements().get(1)};
}
public static ExpressionNode parseExp(String exp){
ParseUnit parseUnit = new MemoryLocation.Builder().add("exp", exp).build().getParseUnit("exp");
ParseResult parseResult = new Parser(parseUnit).parseExpression();
if (parseResult.isError()){
System.err.println("syntax error! invalid argument "+exp);
System.exit(1);
}
return (ExpressionNode) parseResult.getNode();
}
public static Value evalExp(ExpressionNode node){
return Interpreter.evaluateInEmptyScope(node);
}
public static void main(String[] args){
ArgumentParser parser = createMainArgumentParser();
LoadPath.Builder loadPathBuilder = new LoadPath.Builder().addStdLocation();
List modules = Collections.singletonList("std");
LoadPath loadPath = null;
String main = "main.main";
String lib = "main";
String var = "main";
boolean escapeResult = false;
Value[] callArgValues = null;
try {
// load path
Namespace res = parser.parseArgs(args);
List loadPathArgs = (List) res.getAttrs().get("load_path");
modules = res.getList("module");
// add resource locations to loadpath
List resourceLoadPathArgs = (List) res.getAttrs().get("resource_load_path");
for (Object o : resourceLoadPathArgs) {
ResourceLocation location = new ResourceLocation.Builder()
.path(Paths.get(o.toString()))
.allowCaching(true)
.allowNativeFunctions(true)
.build();
loadPathBuilder.add(location);
}
if (loadPathArgs.size() == 0){
// default load path
loadPathBuilder.addCurrentWorkingDirectory();
}
else{
// custom load path
for (Object loadPathArg : loadPathArgs) {
FilesystemLocation location = new FilesystemLocation.Builder(Paths.get(loadPathArg.toString()))
.allowCaching(true)
.allowNativeFunctions(true)
.confineToPath(true)
.build();
loadPathBuilder.add(location);
}
}
loadPath = loadPathBuilder.build();
// escape result?
escapeResult = res.getBoolean("escape_result");
// main
main = res.getString("main");
String[] mainParts = parseMain(main);
lib = mainParts[0];
var = mainParts[1];
// args
List callArgs = (List) res.getAttrs().get("arg");
if (callArgs == null){
callArgs = Collections.emptyList();
}
callArgValues = new Value[callArgs.size()];
try {
for (int i = 0; i < callArgs.size(); i++) {
Object callArg = callArgs.get(i);
if (callArg instanceof StringArg){
StringArg arg = (StringArg) callArg;
Value callValue = Values.make(arg.str);
callArgValues[i] = callValue;
}
else if (callArg instanceof EvalArg){
EvalArg arg = (EvalArg) callArg;
Value callValue = TweakFlow.evaluate(arg.str);
callArgValues[i] = callValue;
}
}
} catch (LangException e){
System.err.println(e.getDigestMessage());
System.exit(1);
}
} catch (ArgumentParserException e) {
parser.handleError(e);
System.exit(1);
}
try {
Runtime runtime = TweakFlow.compile(loadPath, modules, new SimpleDebugHandler(), true);
runtime.evaluate();
Map runtimeModules = runtime.getModules();
Runtime.Module module = runtimeModules.get(runtime.unitKey(modules.get(0)));
Runtime.Var mainVar = module.getLibrary(lib).getVar(var);
Value result = mainVar.call(callArgValues);
if (!escapeResult && result.type() == Types.STRING){
System.out.println(result.string());
}
else{
System.out.println(ValueInspector.inspect(result));
}
}
catch(LangException e){
System.err.println(e.getDigestMessage());
System.exit(1);
}
}
}
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