feat(install): npm/yarn install

.gitignore

@@ -75,4 +75,4 @@ integration-test/transform-tests/output
 
 # generated Sphinx/ReadTheDocs files 
 /docs/build/
-/foo
+/demo

lib/install.js

@@ -0,0 +1,39 @@
+import parseArgs from 'minimist';
+import chalk from 'chalk';
+import { spawn } from 'child_process';
+import { promises as fs } from 'fs';
+import { resolve } from 'any-promise';
+
+export default async function installMain(progname, rawArgs, priv) {
+  const { console, error } = priv;
+  const {
+    _: args,
+  } = parseArgs(rawArgs);
+
+  let uiPackager = 'npm';
+  try {
+    await fs.stat('ui/yarn.lock');
+    uiPackager = 'yarn';
+  } catch (e) {}
+
+  const pspawn = (...args) => new Promise((resolve, reject) => {
+    const cp = spawn(...args);
+    cp.on('exit', resolve);
+    cp.on('error', () => resolve(-1));
+  });
+  const ret = await pspawn('nogo', ['version']);
+
+  const goCmd = ret === 0 && pspawn('npm', ['install'], { cwd: '.agservers', stdio: 'inherit' });
+
+  const children = await Promise.all([
+    pspawn(uiPackager, ['install'], { cwd: 'ui', stdio: 'inherit' }),
+    pspawn('npm', ['install'], { cwd: 'api', stdio: 'inherit' }),
+    pspawn('npm', ['install'], { cwd: 'contract', stdio: 'inherit' }),
+    goCmd,
+  ]);
+
+  if (!goCmd) {
+    console.log(chalk.bold.yellow(`To run Agoric locally you will need to install Go and rerun '${progname} install'`));
+  }
+  console.log(chalk.bold.green('Done installing'));
+}

lib/main.js

@@ -13,11 +13,13 @@ const main = async (progname, rawArgs, privs) => {
     stopEarly: true,
   });
 
-  const insistIsBasedir = async () => {
+  const isNotBasedir = async () => {
     try {
       await fs.promises.stat('.agservers');
+      return false;
     } catch (e) {
       error(`current directory wasn't created by '${progname} init'`);
+      return usage(1);
     }
   };
 
@@ -28,15 +30,19 @@ const main = async (progname, rawArgs, privs) => {
 
   const usage = status => {
     if (status) {
-      console.error(chalk.bold(`Type '${progname} --help' for more information.`));
+      console.error(chalk.bold.yellow(`Type '${progname} --help' for more information.`));
       return status;
     }
     console.log(`\
 Usage: ${progname} [command] [...args]
 
 Manage the Agoric Javascript smart contract platform.
 
-help    display this help and exit
+deploy    upload dapp to started Agoric servers
+help      display this help and exit
+init      initialize a dapp project
+install   load dapp dependencies
+start     run Agoric servers
 `);
     return 0;
   };
@@ -58,14 +64,11 @@ help    display this help and exit
     case 'help':
       return usage(0);
     case 'deploy':
-      await insistIsBasedir();
-      return subMain((await import('./deploy')).default, args);
+      return await isNotBasedir() || subMain((await import('./deploy')).default, args);
+    case 'install':
+      return await isNotBasedir() || subMain((await import('./install')).default, args);
     case 'start':
-      await insistIsBasedir();
-      return subMain((await import('./start')).default, args);
-    // TODO
-    case 'template':
-      return subMain((await import('./template')).default, args);
+      return await isNotBasedir() || subMain((await import('./start')).default, args);
     case 'init':
       return subMain((await import('./init')).default, args);
     default: