CODEWITHSUNDEEP
eclipseeclipse-plugin
BanAnanas
BanAnanas

Reputation: 522

Launch External Tools from Eclipse Plug-in View

I'm building a simple Eclipse plug-in out of preexisting Java application project that relays on 2 external files, one x-executable/application and one .sh script. The call is implemented in application like this, (which wouldn't work in plug-in):

Process p = new ProcessBuilder("external/application_name", "-d", path).start();

I used External Tool Configuration to define how I want this external files to be launch (when user clicks button on View) and I've exported configuration (example of one):

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<launchConfiguration type="org.eclipse.ui.externaltools.ProgramLaunchConfigurationType">
<stringAttribute key="org.eclipse.ui.externaltools.ATTR_LOCATION" value="${workspace_loc:/softwareevolution/external/application_name}"/>
<stringAttribute key="org.eclipse.ui.externaltools.ATTR_TOOL_ARGUMENTS" value="-d ${project_loc}"/>
<stringAttribute key="org.eclipse.ui.externaltools.ATTR_WORKING_DIRECTORY" value="${project_loc}"/>
</launchConfiguration>
  1. How can I have this application install along with Eclipse plug in, or a as a part of it? (see @howlger answer billow) - I set plugin to install as directory / Connected plugin to Feature project- checked unpack after installation - and exported Feature project. Select application's folder on Build/Binary build.
  2. Can I then make use out of this exported .launch files, and if so under which extension point should I include them in plugin.xml? - No. (see @greg-449)

  3. The application is supposed to produce 2 files on the path where it is executed from. I am facing permission denied when trying to launch it in terminal from plug-in's install directory but not when launching in workspace. (see @howlger answer billow) - Upon exporting the plugin, initial permissions of application had changed. Used instructions in p2.inf to chmod them back.

  4. The newly generated files (from runing .sh script) are missing write permission.

ProcessBuilder

After finally setting up plugin correctly and adding ProcessBuilder I was getting exception message : Cannot run program "rfind_20" (in directory "home/adminuser/.p2/pool/plugins/rFindTest3_1.0.0.201809030453/external" error=2:, No such file or directory

File rfind_20 did exist and permission were 777. The targeted project also existed.

Although the working directory was set to applications folder, the application name was not enough, the absolute path was required as command argument.

pb = new ProcessBuilder(url.getPath(), "-d", project.getProject().getLocation().toString()); 

@Override
    public Object execute(ExecutionEvent event) throws ExecutionException {


        IProject project= sampleGetSelectedProject();

        ProcessBuilder pb;
        Process rfind, ajust, copy;

        Bundle bundle = FrameworkUtil.getBundle(getClass());//Bundle bundle = Platform.getBundle("rFindTest3");

        URL url = FileLocator.find(bundle, new Path("external/rfind_20"), null);
        URL dirurl = FileLocator.find(bundle, new Path("external/"), null);



        IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);

        try {

            MessageDialog.openInformation(
                    window.getShell(),
                    "Test",
                    project.getProject().getLocation().toString());

            url = FileLocator.toFileURL(url); 
            dirurl = FileLocator.toFileURL(dirurl);
            pb = new ProcessBuilder(url.getPath(), "-d", project.getProject().getLocation().toString()); 
    //no matter the working directory the absolute path was required!! sending "rfind_20" as command did not work as command
            pb.directory(new File(dirurl.getFile()));

            rfind = pb.start(); 
            rfind.waitFor();
            rfind.destroy();

        }catch(Exception e) {

            MessageDialog.openInformation(
                    window.getShell(),
                    "Test",
                    e.getMessage());

        }


    return null;

}

The only remaining mystery is why my sampleGetProject() method wouldn't work in Plug-in Perspective. So just keep in mind to switch to other Perspectives when testing your plug-in.

Upvotes: 1

Views: 1555

Answers (2)

howlger
howlger

Reputation: 34137

There are two ways to ship an application as part of a plugin and run it via ProcessBuilder (the *.launch file cannot be used inside a plugin for that):

  • Extract the executable files from the plugin JAR to a (temp) directory and change their file permissions before running them
  • Install the plugin as a directory: 
instructions.install = \
   chmod(targetDir:${artifact.location},targetFile:path/to/executable1,permissions:755);\
   chmod(targetDir:${artifact.location},targetFile:path/to-executale_which_generates_files/executable2,permissions:733);\
   chmod(targetDir:${artifact.location},targetFile:path/to-executale_which_generates_files/,permissions:766);
instructions.install.import = org.eclipse.equinox.p2.touchpoint.eclipse.chmod

Upvotes: 1

greg-449
greg-449

Reputation: 111142

If you have a xxx.launch file in the workspace you can launch it using

IFile file = ... get IFile for workspace file

ILaunchConfiguration config = DebugPlugin.getDefault().getLaunchManager().getLaunchConfiguration(file);

DebugUITools.launch(config, ILaunchManager.RUN_MODE, false);

If you have an executable as part of a plug-in then you can't use a .launch file. Instead use FileLocator to get the location of the executable and run it with ProcessBuilder

Bundle bundle = FrameworkUtil.getBundle(getClass());

URL url = FileLocator.find(bundle, new Path("relative path to executable"));

url = FileLocator.toFileURL(url);

Upvotes: 1

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