function mergeVariables()

in src/plugman/variable-merge.js [34:62]

• 21 lines of code
• 7 McCabe index (conditional complexity)

function mergeVariables (plugin_dir, platform, options) {
    options.pluginInfoProvider = options.pluginInfoProvider || new PluginInfoProvider();
    const pluginInfo = options.pluginInfoProvider.get(plugin_dir);
    const prefs = pluginInfo.getPreferences(platform);
    const keys = Object.keys(prefs);

    options.cli_variables = options.cli_variables || {};

    // For all vars defined in prefs, take the value from cli_variables or
    // default to the value from prefs if truthy.
    const mergedVars = {};
    for (const key of keys) {
        if (key in options.cli_variables) {
            mergedVars[key] = options.cli_variables[key];
        } else if (prefs[key]) {
            mergedVars[key] = options.cli_variables[key] = prefs[key];
        }
    }

    // Test for missing vars after having applied defaults
    const mergedVarKeys = new Set(Object.keys(mergedVars));
    const missing_vars = keys.filter(key => !mergedVarKeys.has(key));

    if (missing_vars.length > 0) {
        throw new Error('Variable(s) missing: ' + missing_vars.join(', '));
    }

    return mergedVars;
}