/*
 * Copyright 2014 the original author or authors.
 *
 * 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 org.gradle.integtests.fixtures.jvm;

import org.gradle.api.GradleException;
import org.gradle.process.internal.ExecHandleBuilder;
import org.gradle.process.internal.ExecHandleFactory;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStreamReader;
import java.util.Collection;

/**
 * Uses `java_home -V` to find JVM installations
 */
class OsXInstalledJvmLocator {
    private final ExecHandleFactory execHandleFactory;

    public OsXInstalledJvmLocator(ExecHandleFactory execHandleFactory) {
        this.execHandleFactory = execHandleFactory;
    }

    public Collection<JvmInstallation> findJvms() {
        try {
            ExecHandleBuilder execHandleBuilder = execHandleFactory.newExec();
            execHandleBuilder.workingDir(new File(".").getAbsoluteFile());
            execHandleBuilder.commandLine("/usr/libexec/java_home", "-V");
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            // verbose output is written to stderr for some reason
            execHandleBuilder.setErrorOutput(outputStream);
            execHandleBuilder.setStandardOutput(new ByteArrayOutputStream());
            execHandleBuilder.build().start().waitForFinish().assertNormalExitValue();
            return new OsXJavaHomeParser().parse(new InputStreamReader(new ByteArrayInputStream(outputStream.toByteArray())));
        } catch (Exception e) {
            throw new GradleException("Could not locate installed JVMs.", e);
        }
    }
}

@@ -694,16 +694,66 @@
 eption;%0A
+import org.gradle.process.internal.ExecException;%0A
 import o
@@ -794,24 +794,24 @@
 dleBuilder;%0A
-
 import org.g
@@ -1011,16 +1011,46 @@
 lection;
+%0Aimport java.util.Collections;
 %0A%0A/**%0A *
@@ -1367,24 +1367,98 @@
 indJvms() %7B%0A
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();%0A
         try 
@@ -1692,86 +1692,8 @@
 %22);%0A
-            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();%0A
     
@@ -1976,24 +1976,24 @@
 xitValue();%0A
-
             
@@ -2103,24 +2103,294 @@
 Array())));%0A
+        %7D catch (ExecException e) %7B%0A            if (new String(outputStream.toByteArray()).contains(%22No Java runtime present%22)) %7B%0A                return Collections.emptyList();%0A            %7D%0A            throw new GradleException(%22Could not locate installed JVMs.%22, e);%0A
         %7D ca

Fix OsXInstalledJvmLocator for when there's no java runtime installed