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package org.jetbrains
import org.gradle.api.tasks.AbstractExecTask
import org.gradle.api.tasks.TaskAction
import org.gradle.internal.os.OperatingSystem
import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.Paths
class CrossPlatformExec extends AbstractExecTask {
private static final def windowsExtensions = ['bat', 'cmd', 'exe'];
private static final def unixExtensions = [null, 'sh'];
private boolean windows;
public CrossPlatformExec() {
super(CrossPlatformExec.class);
windows = OperatingSystem.current().windows;
}
@Override
@TaskAction
protected void exec() {
List<String> commandLine = this.getCommandLine();
if (!commandLine.isEmpty()) {
commandLine[0] = findCommand(commandLine[0], windows);
}
if (windows) {
if (!commandLine.isEmpty() && commandLine[0]) {
commandLine
}
commandLine.add(0, '/c');
commandLine.add(0, 'cmd');
}
this.setCommandLine(commandLine);
super.exec();
}
private static String findCommand(String command, boolean windows) {
command = normalizeCommandPaths(command);
def extensions = windows ? windowsExtensions : unixExtensions;
return extensions.findResult(command) { extension ->
Path commandFile
if (extension) {
commandFile = Paths.get(command + '.' + extension);
} else {
commandFile = Paths.get(command);
}
return resolveCommandFromFile(commandFile, windows);
};
}
private static String resolveCommandFromFile(Path commandFile, boolean windows) {
if (!Files.isExecutable(commandFile)) {
return null;
}
return commandFile.toAbsolutePath().normalize();
}
private static String normalizeCommandPaths(String command) {
// need to escape backslash so it works with regex
String backslashSeparator = '\\\\';
String forwardSlashSeparator = '/';
// escape separator if it's a backslash
char backslash = '\\';
String separator = File.separatorChar == backslash ? backslashSeparator : File.separator
return command
// first replace all of the backslashes with forward slashes
.replaceAll(backslashSeparator, forwardSlashSeparator)
// then replace all forward slashes with whatever the separator actually is
.replaceAll(forwardSlashSeparator, separator);
}
}
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