1 files changed, 92 insertions, 0 deletions
diff --git a/buildSrc/src/main/groovy/org/jetbrains/CrossPlatformExec.groovy b/buildSrc/src/main/groovy/org/jetbrains/CrossPlatformExec.groovy
new file mode 100644
index 00000000..9c6780f7
--- /dev/null
+++ b/buildSrc/src/main/groovy/org/jetbrains/CrossPlatformExec.groovy
@@ -0,0 +1,92 @@
+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(workingDir, 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(File workingDir, 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(workingDir, commandFile, windows);
+        };
+    }
+
+    private static String resolveCommandFromFile(File workingDir, Path commandFile, boolean windows) {
+        if (!Files.isExecutable(commandFile)) {
+            return null;
+        }
+
+        Path cwd = Paths.get(workingDir.absolutePath).toAbsolutePath().normalize();
+
+        String resolvedCommand = cwd.relativize(commandFile.toAbsolutePath().normalize());
+
+        if (!windows && !resolvedCommand.startsWith('.')) {
+            resolvedCommand = '.' + File.separator + resolvedCommand;
+        }
+
+        return resolvedCommand;
+    }
+
+    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);
+    }
+}
+\ No newline at end of file