installer.mel

// TODO change this to your plugin name
string $MY_PLUGIN_NAME = "viewport_2_optimizer.py";

// Execute a Python command to get the path to the Maya Python interpreter
string $mayaPythonPath = `python("import sys; f'\"{sys.executable}\"'")`;

// Get Maya python interpreter path
string $mayaInterpreter = `substitute "maya.exe" $mayaPythonPath "mayapy.exe"`;

// Create a loading bar
string $progressWindow = `progressWindow -title "Installing Package" -progress 0 -status "Installing..." -isInterruptable true`;

// Define a dummy global procedure to use `whatIs` to find the MEL script path
global proc FindMe() {}

// Get the path of the MEL script using `whatIs`
string $melScriptPath = `whatIs "FindMe"`;

// The `whatIs` command returns a string like "Mel procedure found in: /path/to/installer.mel",
// so we need to extract the actual file path by removing the "Mel procedure found in: " part
string $melScriptDir = `substitute "Mel procedure found in: " $melScriptPath ""`;

// Remove the script file name ("installer.mel") from the path
$melScriptDir = `dirname $melScriptDir`;
print("melScriptDir: " + $melScriptDir + "\n");

// get the requirements.txt path to install our dependencies
string $requirementsFilePath = $melScriptDir + "/requirements.txt";
// Check if the `requirements.txt` file exists
if (!`filetest -f $requirementsFilePath`) {
    error("requirements.txt file does not exist at: " + $requirementsFilePath);
} else {
    print("requirements.txt found at: " + $requirementsFilePath + "\n");
}

// install dependencies
string $targetFolderPath = `getenv "HOME"` + "/maya/scripts/";
string $pipInstallCommand = $mayaInterpreter + " -m pip install --target=" + $targetFolderPath + " -r " + $requirementsFilePath;
print("Running command: " + $pipInstallCommand + "\n");
system($pipInstallCommand);  // Execute the pip install command





// Define the plugin file path relative to the MEL script's location
string $pluginSourceFilePath = $melScriptDir + "/" + $MY_PLUGIN_NAME;
print("Plugin source path: " + $pluginSourceFilePath + "\n");

// Get the Maya plug-ins folder
string $pluginFolderPath = `getenv "HOME"` + "/maya/plug-ins/"; 
// Check if the plugin folder exists using `filetest`, and create it if not
if (!`filetest -d $pluginFolderPath`) {
    // Create the plugin folder
    sysFile -makeDir $pluginFolderPath;
    print("Plugin folder created: " + $pluginFolderPath + "\n");

    // If a new folder was created, append it to MAYA_PLUG_IN_PATH
    string $pluginPathEnv = `getenv "MAYA_PLUG_IN_PATH"`;
    string $newPluginPathEnv = $pluginPathEnv + ";" + $pluginFolderPath;
    putenv "MAYA_PLUG_IN_PATH" $newPluginPathEnv;
} else {
    print("Plugin folder already exists: " + $pluginFolderPath + "\n");
}

// Define the destination plugin file path
string $pluginDestinationFilePath = $pluginFolderPath + $MY_PLUGIN_NAME;

// Check if the source plugin file exists
if (!`filetest -f $pluginSourceFilePath`) {
    error("Source plugin file does not exist: " + $pluginSourceFilePath);
}

// Copy the plugin file to the Maya plug-ins folder
print("copy plugin file from: " + $pluginSourceFilePath + " to: " + $pluginDestinationFilePath + "\n");


python("import shutil; shutil.copyfile(r'" + $pluginSourceFilePath + "', r'" + $pluginDestinationFilePath + "')");
// Check if the plugin copied
if (!`filetest -f $pluginDestinationFilePath`) {
    error("plugin file did not copy to: " + $pluginDestinationFilePath);
}
print("Plugin file copied to: " + $pluginDestinationFilePath + "\n");
print("Package installation complete.\n");
// Close the progress window
progressWindow -endProgress;

// Load the plugin, this might fail if the plugin contains python errors
loadPlugin $MY_PLUGIN_NAME;
// Enable the plugin
eval("plug-inInfo -q -loaded " + $MY_PLUGIN_NAME);