import org.gradle.api.Action;

import java.io.File;
import java.util.List;

public interface MutableCommandLineToolContext extends CommandLineToolContext {

    void setArgAction(Action<List<String>> argAction);

    void addPath(File pathEntry);

    void addPath(List<File> path);

    void addEnvironmentVar(String key, String value);

    private final Map<String, String> environment = new HashMap<String, String>();
    private final List<File> path = new ArrayList<File>();

    @Override
    public void setArgAction(Action<List<String>> argAction) {
        postArgsAction = argAction;
    }

    @Override
    public void addPath(File pathEntry) {
        this.path.add(pathEntry);
    }

    @Override

    private CommandLineToolContext context(CommandLineToolConfigurationInternal toolConfiguration) {
        MutableCommandLineToolContext baseInvocation = new DefaultMutableCommandLineToolContext();
        baseInvocation.setArgAction(toolConfiguration.getArgAction());

        String developerDir = System.getenv("DEVELOPER_DIR");
        if (developerDir != null) {
            baseInvocation.addEnvironmentVar("DEVELOPER_DIR", developerDir);

    def "user-supplied arg actions run once per execute"() {
        given:
        def invocationContext = new DefaultMutableCommandLineToolContext()
        def action = Mock(Action)
        invocationContext.setArgAction(action)
        def compiler = getCompiler(invocationContext, O_EXT, false)
        def testDir = tmpDirProvider.testDirectory
        def objectFileDir = testDir.file("output/objects")

        // Clear environment variables that might effect cl.exe & link.exe
        clearEnvironmentVars(invocationContext, "INCLUDE", "CL", "LIBPATH", "LINK", "LIB");

        invocationContext.setArgAction(commandLineToolConfiguration.getArgAction());
        return invocationContext;
    }

    private void clearEnvironmentVars(MutableCommandLineToolContext invocation, String... names) {

        // MinGW requires the path to be set
        baseInvocation.addPath(toolSearchPath.getPath());
        baseInvocation.addEnvironmentVar("CYGWIN", "nodosfilewarning");
        baseInvocation.setArgAction(toolConfiguration.getArgAction());

        String developerDir = System.getenv("DEVELOPER_DIR");
        if (developerDir != null) {
            baseInvocation.addEnvironmentVar("DEVELOPER_DIR", developerDir);