chore: Add none output and silent flag (twilio#139)

Author: Anuj Badhwar

src/base-commands/base-command.js

@@ -37,10 +37,15 @@ class BaseCommand extends Command {
     this.flags = flags;
     await this.loadConfig();
 
-    this.outputProcessor = OutputFormats[this.flags['cli-output-format'] || DEFAULT_OUTPUT_FORMAT];
+    this.outputProcessor = this.flags.silent
+      ? OutputFormats.none
+      : OutputFormats[this.flags['cli-output-format'] || DEFAULT_OUTPUT_FORMAT];
 
     this.logger = logger;
-    this.logger.config.level = LoggingLevel[flags['cli-log-level'] || DEFAULT_LOG_LEVEL];
+    // Give precedence to silent flag
+    this.logger.config.level = this.flags.silent
+      ? LoggingLevel.none
+      : LoggingLevel[flags['cli-log-level'] || DEFAULT_LOG_LEVEL];
 
     this.logger.debug(`Config File: ${this.configFile.filePath}`);
 
@@ -113,6 +118,11 @@ class BaseCommand extends Command {
   }
 
   output(fullData, properties, options) {
+    if (!this.outputProcessor) {
+      // Silenced output
+      return;
+    }
+
     const dataArray = fullData.constructor === Array ? fullData : [fullData];
 
     if (dataArray.length === 0) {
@@ -204,6 +214,11 @@ BaseCommand.flags = {
     options: Object.keys(OutputFormats),
     description: 'Format of command output.',
   }),
+
+  silent: oclifFlags.boolean({
+    description: 'Suppress output and logs. This is a shorthand for "-l none -o none".',
+    default: false,
+  }),
 };
 
 module.exports = BaseCommand;

src/services/output-formats/index.js

@@ -2,6 +2,7 @@ const OutputFormats = {
   columns: require('./columns'),
   json: require('./json'),
   tsv: require('./tsv'),
+  none: undefined,
 };
 
 module.exports = {

test/base-commands/base-command.test.js

@@ -219,6 +219,38 @@ describe('base-commands', () => {
           ctx.testCmd.output(testData);
           expect(ctx.stdout).to.contain('FOO\tBAR\nfoo\tbar\n2\t2');
         });
+
+      test
+        .twilioCliEnv(Config)
+        .do(async (ctx) => {
+          ctx.testCmd = new BaseCommand(['-o', 'none'], ctx.fakeConfig);
+          await ctx.testCmd.run();
+        })
+        .stdout()
+        .it('should not output to stdout with none flag', (ctx) => {
+          const testData = [
+            { foo: 'foo', bar: 'bar' },
+            { foo: 'test', bar: 'test' },
+          ];
+          ctx.testCmd.output(testData);
+          expect(ctx.stdout).to.be.empty;
+          expect(ctx.testCmd.outputProcessor).to.be.undefined;
+        });
+
+      test
+        .twilioCliEnv(Config)
+        .do(async (ctx) => {
+          ctx.testCmd = new BaseCommand(['--silent'], ctx.fakeConfig);
+          await ctx.testCmd.run();
+        })
+        .stdout()
+        .it('should not output to stdout with silent flag', (ctx) => {
+          const testData = [{ foo: 'foo', bar: 'bar' }];
+          ctx.testCmd.output(testData);
+          expect(ctx.stdout).to.be.empty;
+          expect(ctx.testCmd.logger.config.level).to.equal(LoggingLevel.none);
+          expect(ctx.testCmd.outputProcessor).to.be.undefined;
+        });
     });
 
     describe('getPromptMessage', () => {