cli: add ppman install and list

cli/commands/ppman_commands/list.js

@@ -0,0 +1,31 @@
+const {PistonEngine} = require('piston-api-client');
+const chalk = require('chalk');
+
+exports.command = ['list']
+exports.aliases = ['l']
+exports.describe = 'Lists all available packages'
+
+
+const msg_format = {
+    'color': p => `${chalk[p.installed ? "green":"red"]("•")} ${p.language} ${p.language_version}`,
+    'monochrome': p => `${p.language} ${p.language_version} ${p.installed ? "(INSTALLED)": ""}`,
+    'json': JSON.stringify
+
+}
+
+exports.handler = async function(argv){
+    const api = new PistonEngine(argv['piston-url']);
+    
+    const repos = await api.list_repos();
+    const repos_obj = await Promise.all(repos.repos.map(({slug}) => api.get_repo(slug)));
+    const packages = await repos_obj.reduce(async (a, c) => [
+        ...await a,
+        ...await c.list_packages().catch(x=>{console.log(x); return []})
+    ], []);
+    
+    const pkg_msg = packages
+        .map(msg_format.color)
+        .join('\n');
+
+    console.log(pkg_msg);
+}