de.mhus.karaf.commands.shell.CmdRun Maven / Gradle / Ivy
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commands OSGi blueprint bundle project.
/**
* Copyright 2018 Mike Hummel
*
* 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.
*/
package de.mhus.karaf.commands.shell;
import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.karaf.shell.api.action.Action;
import org.apache.karaf.shell.api.action.Argument;
import org.apache.karaf.shell.api.action.Command;
import org.apache.karaf.shell.api.action.Option;
import org.apache.karaf.shell.api.action.lifecycle.Reference;
import org.apache.karaf.shell.api.action.lifecycle.Service;
import org.apache.karaf.shell.api.console.Session;
import de.mhus.lib.core.MCast;
import de.mhus.lib.core.MFile;
import de.mhus.lib.core.MLog;
import de.mhus.lib.core.MString;
import de.mhus.lib.core.util.ArrayIterator;
@Command(scope = "shell", name = "run", description = "Run Gogo Script")
@Service
public class CmdRun extends MLog implements Action {
@Argument(index = 0, name = "command", description = "File or command", required = true, multiValued = true)
private String[] cmd;
@Option(name = "-d", aliases = { "--debug" }, description = "Print debug information", required = false, multiValued = false)
boolean debug;
@Option(name = "-i", aliases = { "--notinteruptable" }, description = "Not interuptable by pressing Ctrl+C, this will allow the script to process binary stdin", required = false, multiValued = false)
boolean notInteruptable;
@Option(name = "-c", aliases = { "--command" }, description = "direct command input", required = false, multiValued = false)
boolean command;
@Option(name = "-g", aliases = { "--goto" }, description = "First goto jump to start", required = false, multiValued = false)
String go;
@Option(name = "-s", aliases = { "--sensitive" }, description = "do not separate commands by semikolon", required = false, multiValued = false)
boolean sensitive;
@Reference
private Session session;
@Override
public Object execute() throws Exception {
List lines = null;
String fileName = MString.join(cmd, ' ');
if (command) {
lines = new LinkedList<>();
if (!sensitive)
fileName = fileName.replace(";", "\n");
for (String line : MString.split(fileName, "\n") )
lines.add(line);
} else {
File file = new File(fileName);
lines = MFile.readLines(file, false);
}
Context context = new Context(lines);
context.execute(session);
return null;
}
private class Context {
private HashMap labels = new HashMap<>();
private List lines;
private int pos;
private LinkedList loops = new LinkedList<>();
public Context(List lines) {
this.lines = lines;
for (int i = 0; i < lines.size(); i++) {
String line = lines.get(i).trim();
if (line.startsWith("label ")) {
String label = line.substring(6).trim();
if (label.endsWith(":")) label = label.substring(0, label.length()-1).trim();
labels.put(label, i);
}
}
}
public void execute(Session session) throws Exception {
pos = 0;
while(true) {
// check stdin
if (!notInteruptable) {
while ( System.in.available() > 0 ) {
int b = System.in.read();
if (b < 0) {
break;
}
System.out.print((char)b);
}
}
String line = null;
if (go != null) { // insert special goto command
line = "goto " + go;
go = null;
} else {
if (pos >= lines.size()) return;
line = lines.get(pos).trim();
if (debug) System.out.println("--- " + pos + " " + line);
pos++;
}
if (line.startsWith("#") || line.length() == 0) {
if (line.equals("#--")) {
while (true) {
if (pos >= lines.size()) {
System.err.println("Start comment block without end");
return;
}
line = lines.get(pos).trim();
pos++;
if (line.equals("--#")) continue;
}
}
continue;
}
if (line.startsWith("goto ")) {
String label = line.substring(5).trim();
Integer newPos = labels.get(label);
if (newPos == null) {
int p = MCast.toint(label, -1);
if (p >= 0)
newPos = p;
}
if (newPos == null) {
System.err.println("Label not found: " + label + " at " + (pos-1));
return;
}
pos = newPos;
} else
if (line.startsWith("if ")) {
if (isTrue(session.execute("%(" + line.substring(3) + ")" )) ) {
} else {
if (!findEndIf(session)) return;
}
} else
if (line.startsWith("while ")) {
Loop loop = new WhileLoop(session,line.substring(6), pos);
if (loop.hasNext()) {
loops.add(0, loop);
loop.next();
} else {
if (!findDone()) return;
}
} else
if (line.startsWith("for ")) {
Loop loop = new ForLoop(session,line.substring(4), pos);
if (loop.hasNext()) {
loops.add(0, loop);
loop.next();
} else {
if (!findDone()) return;
}
} else
if (line.equals("else")) {
if (!findEndIf(null)) return;
} else
if (line.equals("endif")) {
} else
if (line.startsWith("elseif ")) {
if (!findEndIf(null)) return;
} else
if (line.equals("done")) {
if (loops.size() < 1) {
System.err.println("done without for");
return;
}
Loop loop = loops.getFirst();
if (loop.hasNext()) {
loop.next();
pos = loop.getStartPos();
} else {
loops.removeFirst();
}
} else
if (line.equals("exit")) {
return;
} else
if (line.startsWith("label ")) {
} else {
session.execute(line);
}
}
}
private boolean findEndIf(Session session) throws Exception {
int l = pos-1;
int ifCnt = 0;
while (true) {
if (pos >= lines.size()) {
System.err.println("If with insufficien end at line " + l);
return false;
}
String line = lines.get(pos).trim();
pos++;
if (line.startsWith("if ")) ifCnt++;
else
if (line.equals("else")) ifCnt--;
else
if (line.startsWith("elseif ")) {
if (ifCnt == 0) {
if (session == null) {
} else
if (isTrue(session.execute("%(" + line.substring(7) + ")" )) ) {
return true;
}
}
}
else
if (line.equals("endif")) ifCnt--;
if (ifCnt < 0) return true;
}
}
private boolean findDone() throws Exception {
int l = pos-1;
int ifCnt = 0;
while (true) {
if (pos >= lines.size()) {
System.err.println("for with insufficien end at line " + l);
return false;
}
String line = lines.get(pos).trim();
pos++;
if (line.startsWith("for ")) ifCnt++;
else
if (line.startsWith("while ")) ifCnt++;
else
if (line.equals("done")) ifCnt--;
if (ifCnt < 0) return true;
}
}
}
private boolean isTrue(Object result) {
if (result == null) {
return false;
}
if (result instanceof String && ((String) result).equals("")) {
return false;
}
if (result instanceof Number) {
return ((Number) result).doubleValue() != 0.0d;
}
if (result instanceof Boolean) {
return (Boolean) result;
}
return true;
}
public abstract class Loop {
protected int startPos;
protected Session session;
protected String condition;
public Loop(Session session, String condition, int pos) throws Exception {
this.session = session;
this.condition = condition.trim();
this.startPos = pos;
}
public int getStartPos() {
return startPos;
}
public abstract void next();
public abstract boolean hasNext() throws Exception;
}
public class WhileLoop extends Loop {
public WhileLoop(Session session, String condition, int pos) throws Exception {
super(session, condition, pos);
}
@Override
public void next() {
}
@Override
public boolean hasNext() throws Exception {
Object res = session.execute( "%(" + condition + ")" );
return isTrue(res);
}
}
public class ForLoop extends Loop {
private String varName;
private Iterator iterator;
@SuppressWarnings("rawtypes")
public ForLoop(Session session, String condition, int pos) throws Exception {
super(session, condition, pos);
varName = MString.beforeIndex(condition, ' ');
condition = MString.afterIndex(condition, ' ');
int p = condition.indexOf("in ");
if (p > -1 ) {
//TODO read options like delimiter
condition = condition.substring(p+3).trim();
}
this.condition = condition;
Object res = session.execute(condition);
if (res == null) {
} else
if (res instanceof Map) {
iterator = ((Map)res).entrySet().iterator();
} else
if (res instanceof List) {
iterator = ((List)res).iterator();
} else
if (res instanceof Set) {
iterator = ((Set)res).iterator();
} else {
String[] array = MString.split(String.valueOf(res), "\n");
int stop = array.length;
if (array.length > 0 && MString.isEmpty(array[stop-1])) stop--;
iterator = new ArrayIterator( array, 0, stop );
}
}
@Override
public int getStartPos() {
return startPos;
}
@Override
public void next() {
Object next = iterator.next();
session.put(varName, next);
}
@Override
public boolean hasNext() {
return iterator != null && iterator.hasNext();
}
}
}