[core] Add sanity exec command that registers part loader + babel (#138)

Author: rexxars

packages/@sanity/core/package.json

@@ -16,9 +16,13 @@
   "dependencies": {
     "@sanity/check": "^0.108.0",
     "@sanity/mutator": "^0.108.0",
+    "@sanity/plugin-loader": "^0.108.0",
     "@sanity/resolver": "^0.108.0",
     "@sanity/server": "^0.108.0",
     "@sanity/util": "^0.108.0",
+    "babel-preset-es2015-node4": "^2.1.1",
+    "babel-preset-stage-2": "^6.22.0",
+    "babel-register": "^6.26.0",
     "batch-stream-operation": "^1.0.2",
     "debug": "^2.6.3",
     "deep-sort-object": "^1.0.1",
@@ -43,8 +47,6 @@
   },
   "devDependencies": {
     "babel-plugin-lodash": "^3.2.11",
-    "babel-preset-es2015-node4": "^2.1.1",
-    "babel-preset-stage-2": "^6.22.0",
     "chai": "^3.5.0",
     "chai-as-promised": "^6.0.0",
     "eslint": "^3.19.0",

packages/@sanity/core/src/actions/exec/babel.js

@@ -0,0 +1,5 @@
+const presets = ['es2015-node4', 'stage-2']
+
+require('babel-register')({
+  presets: presets.map(preset => require.resolve(`babel-preset-${preset}`)),
+})

packages/@sanity/core/src/actions/exec/execScript.js

@@ -0,0 +1,24 @@
+const spawn = require('child_process').spawn
+const fsp = require('fs-promise')
+const path = require('path')
+
+module.exports = async args => {
+  const [script] = args.argsWithoutOptions
+  const scriptPath = path.resolve(script)
+
+  if (!script) {
+    throw new Error('SCRIPT must be provided. `sanity exec <script>`')
+  }
+
+  if (!await fsp.exists(scriptPath)) {
+    throw new Error(`${scriptPath} does not exist`)
+  }
+
+  const babel = require.resolve('./babel')
+  const loader = require.resolve('@sanity/plugin-loader/register')
+  const proc = spawn(process.argv[0], ['-r', babel, '-r', loader, scriptPath])
+
+  proc.stdout.pipe(process.stdout)
+  proc.stderr.pipe(process.stderr)
+  proc.on('close', process.exit)
+}

packages/@sanity/core/src/commands/exec/execCommand.js

@@ -0,0 +1,8 @@
+import lazyRequire from '@sanity/util/lib/lazyRequire'
+
+export default {
+  name: 'exec',
+  signature: 'SCRIPT',
+  description: 'Runs a script in Sanity context',
+  action: lazyRequire(require.resolve('../../actions/exec/execScript'))
+}

packages/@sanity/core/src/commands/index.js

@@ -20,6 +20,7 @@ import deleteHookCommand from './hook/deleteHookCommand'
 import listHooksCommand from './hook/listHooksCommand'
 import printHookAttemptCommand from './hook/printHookAttemptCommand'
 import listHookLogsCommand from './hook/listHookLogsCommand'
+import execCommand from './exec/execCommand'
 
 export default [
   buildCommand,
@@ -43,5 +44,6 @@ export default [
   queryDocumentsCommand,
   installCommand,
   startCommand,
-  uninstallCommand
+  uninstallCommand,
+  execCommand
 ]