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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The SFC licenses this file
// to you 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.openqa.selenium.os;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static org.openqa.selenium.Platform.WINDOWS;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.openqa.selenium.Platform;
public class ExecutableFinder {
private static final List ENDINGS =
Platform.getCurrent().is(WINDOWS)
? Arrays.asList("", ".cmd", ".exe", ".com", ".bat")
: singletonList("");
/**
* Find the executable by scanning the file system and the PATH. In the case of Windows this
* method allows common executable endings (".com", ".bat" and ".exe") to be omitted.
*
* @param named The name of the executable to find
* @return The absolute path to the executable, or null if no match is made.
*/
public String find(String named) {
File file = new File(named);
if (canExecute(file)) {
return named;
}
if (Platform.getCurrent().is(Platform.WINDOWS)) {
file = new File(named + ".exe");
if (canExecute(file)) {
return named + ".exe";
}
}
List pathSegments = new ArrayList<>(fromEnvironment());
if (Platform.getCurrent().is(Platform.MAC)) {
pathSegments.addAll(macSpecificPathSegments());
}
for (String pathSegment : pathSegments) {
for (String ending : ENDINGS) {
file = new File(pathSegment, named + ending);
if (canExecute(file)) {
return file.getAbsolutePath();
}
}
}
return null;
}
private List fromEnvironment() {
String pathName = "PATH";
Map env = System.getenv();
if (!env.containsKey(pathName)) {
for (String key : env.keySet()) {
if (pathName.equalsIgnoreCase(key)) {
pathName = key;
break;
}
}
}
String path = env.get(pathName);
return path != null ? Arrays.asList(path.split(File.pathSeparator)) : emptyList();
}
private List macSpecificPathSegments() {
File pathFile = new File("/etc/paths");
if (pathFile.exists()) {
try {
return Files.readAllLines(pathFile.toPath());
} catch (IOException e) {
// Guess we won't include those, then
}
}
return emptyList();
}
private static boolean canExecute(File file) {
return file.exists() && !file.isDirectory() && file.canExecute();
}
}
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