feat: create automated language installer

references #9

models/install.js

@@ -0,0 +1,56 @@
+//     wink-nlp
+//     A new way of doing NLP
+//
+//     Copyright (C) 2017-20  GRAYPE Systems Private Limited
+//
+//     This file is part of “wink-nlp”.
+//
+//     Permission is hereby granted, free of charge, to any
+//     person obtaining a copy of this software and
+//     associated documentation files (the "Software"), to
+//     deal in the Software without restriction, including
+//     without limitation the rights to use, copy, modify,
+//     merge, publish, distribute, sublicense, and/or sell
+//     copies of the Software, and to permit persons to
+//     whom the Software is furnished to do so, subject to
+//     the following conditions:
+//
+//     The above copyright notice and this permission notice
+//     shall be included in all copies or substantial
+//     portions of the Software.
+//
+//     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+//     ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+//     TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+//     PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+//     THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+//     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+//     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//     DEALINGS IN THE SOFTWARE.
+
+//
+
+/* eslint-disable no-console */
+
+const childProcess = require( 'child_process' );
+const languageModels = require( './language-models.json' );
+// Model name with be at [ 1 ], as we are using "node -e" command.
+const modelName = process.argv[ 1 ] || 'wink-eng-lite-model';
+const modelDetails = languageModels.find( ( lm ) => lm.name === modelName );
+if ( modelDetails === undefined ) {
+  // Display error in red color.
+  console.log( `\n\x1b[0m\x1b[31m"${modelName}" is an invalid model name.\x1b[0m` );
+  // Corrective action in green color.
+  console.log( '\n\x1b[32mUse one of the following models:\x1b[0m');
+  console.table( languageModels );
+  console.log();
+  throw Error( 'Model installation failed!' );
+}
+var modelVersion = modelDetails.version;
+var model = `https://github.com/winkjs/${modelName}/releases/download/${modelVersion}/${modelName}-${modelVersion}.tgz`;
+// Display (un)installation commands in yellow color.
+console.log( `\n\x1b[33mnpm uninstall ${model}\x1b[0m` );
+childProcess.execSync( `npm uninstall ${model}`, { stdio: 'inherit' } ); // eslint-disable-line no-sync
+console.log( `\n\x1b[33mnpm install ${model} --save\x1b[0m` );
+childProcess.execSync( `npm install ${model} --save`, { stdio: 'inherit' } ); // eslint-disable-line no-sync

models/language-models.json

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+[
+  { "name": "wink-eng-lite-model", "version": "0.2.0" }
+]