feat(core): add list command

Author: JamieMason

src/bin-list.ts

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+
+import chalk from 'chalk';
+import * as program from 'commander';
+import * as _ from 'lodash';
+import { DEFAULT_PATTERN, OPTION_PACKAGES } from './constants';
+import { getVersions } from './manifests';
+
+program.option(OPTION_PACKAGES.spec, OPTION_PACKAGES.description).parse(process.argv);
+
+const { packages = DEFAULT_PATTERN } = program;
+
+getVersions(packages).then((versionByName) => {
+  _.each(versionByName, (versions, name) => {
+    if (versions.length > 1) {
+      console.log(chalk.yellow(name), chalk.dim(versions.join(', ')));
+    } else {
+      console.log(chalk.blue(name), chalk.dim(versions[0]));
+    }
+  });
+});

src/bin.ts

@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+
+import * as program from 'commander';
+import { COMMAND_LIST } from './constants';
+
+program.version('TODO').command(COMMAND_LIST.name, COMMAND_LIST.description, {
+  isDefault: true
+});
+
+program.parse(process.argv);

src/constants.ts

@@ -1,8 +1,16 @@
 import { IManifestKey } from './typings';
 
+export const COMMAND_LIST = {
+  description: 'list every dependency used in your packages',
+  name: 'list'
+};
 export const DEFAULT_PATTERN = './packages/*/package.json';
 export const DEPENDENCY_TYPES: IManifestKey[] = ['dependencies', 'devDependencies', 'peerDependencies'];
 export const GREATER = 1;
 export const LESSER = -1;
+export const OPTION_PACKAGES = {
+  description: `location of packages, defaults to "${DEFAULT_PATTERN}"`,
+  spec: '-p, --packages <glob>'
+};
 export const SAME = 0;
 export const SEMVER_ORDER = ['<', '<=', '', '~', '^', '>=', '>', '*'];