* first action! (#1)

node_modules/npm-check-updates/lib/package-managers/bower.js

@@ -0,0 +1,76 @@
+'use strict';
+const cint = require('cint');
+const chalk = require('chalk');
+const requireg = require('requireg');
+
+/**
+ * @param args.global
+ * @param args.registry
+ * @param args.loglevel
+ */
+
+// see if the bower dependency has been installed
+const bower = ({loglevel}) => {
+    try {
+        requireg.resolve('bower'); // throws an error if not installed
+        return requireg('bower');
+    } catch (e) {
+        if (loglevel !== 'silent') {
+            console.error(`Bower not installed. Please install bower using: ${chalk.cyan('npm install -g bower')}`);
+        }
+        process.exit(1);
+    }
+};
+
+module.exports = {
+
+    list({prefix, loglevel} = {}) {
+
+        return new Promise((resolve, reject) => {
+            bower({loglevel}).commands.list(null, {cwd: prefix})
+                .on('end', results => {
+                    resolve(cint.mapObject(results.dependencies, (key, value) => {
+                        return cint.keyValue(key, value.pkgMeta);
+                    }));
+                })
+                .on('error', reject);
+        });
+    },
+
+    latest(packageName, _, {prefix, loglevel} = {}) {
+
+        return new Promise((resolve, reject) => {
+            bower({loglevel}).commands.info(packageName, null, {cwd: prefix})
+                .on('end', results => {
+                    resolve(results.latest.version);
+                })
+                .on('error', err => {
+                    // normalize 404
+                    reject(/Package \S* not found|Repository not found/.test(err.message) ? '404 Not Found' : err);
+                });
+        });
+    },
+
+    greatest(packageName, _, {prefix, loglevel} = {}) {
+
+        return new Promise((resolve, reject) => {
+            bower({loglevel}).commands.info(packageName, null, {cwd: prefix})
+                .on('end', results => {
+                    resolve(results.versions[0]); // bower versions returned in highest-to-lowest order.
+                })
+                .on('error', reject);
+        });
+    },
+
+    newest() {
+        throw new Error('Semantic versioning level "newest" is not supported for Bower');
+    },
+
+    greatestMajor() {
+        throw new Error('Semantic versioning level "major" is not supported for Bower');
+    },
+
+    greatestMinor() {
+        throw new Error('Semantic versioning level "minor" is not supported for Bower');
+    }
+};