Fixing issue with string templates importing vm2 which requires other prebuilts for JS in the CLI - no need for these to add to build size when JS is unused.

packages/cli/src/environment.js

@@ -0,0 +1 @@
+process.env.NO_JS = "1"

packages/cli/src/index.js

@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 require("./prebuilds")
+require("./environment")
 const { getCommands } = require("./options")
 const { Command } = require("commander")
 const { getHelpDescription } = require("./utils")

packages/cli/src/prebuilds.js

@@ -1,6 +1,7 @@
 const os = require("os")
 const { join } = require("path")
 const fs = require("fs")
+const { error } = require("./utils")
 const PREBUILDS = "prebuilds"
 const ARCH = `${os.platform()}-${os.arch()}`
 const PREBUILD_DIR = join(process.execPath, "..", PREBUILDS, ARCH)
@@ -25,7 +26,15 @@ function checkForBinaries() {
   }
 }
 
-function cleanup() {
+function cleanup(evt) {
+  if (evt && evt.errno) {
+    console.error(
+      error(
+        "Failed to run CLI command - please report with the following message:"
+      )
+    )
+    console.error(error(evt))
+  }
   if (fs.existsSync(PREBUILD_DIR)) {
     fs.rmSync(PREBUILD_DIR, { recursive: true })
   }

packages/string-templates/src/helpers/javascript.js

@@ -36,6 +36,9 @@ const getContextValue = (path, context) => {
 
 // Evaluates JS code against a certain context
 module.exports.processJS = (handlebars, context) => {
+  if (process && process.env.NO_JS) {
+    throw new Error("JS disabled in environment.")
+  }
   try {
     // Wrap JS in a function and immediately invoke it.
     // This is required to allow the final `return` statement to be valid.

packages/string-templates/src/index.cjs

@@ -1,6 +1,4 @@
-const { VM } = require("vm2")
 const templates = require("./index.js")
-const { setJSRunner } = require("./helpers/javascript")
 
 /**
  * CJS entrypoint for rollup
@@ -21,13 +19,17 @@ module.exports.disableEscaping = templates.disableEscaping
 module.exports.findHBSBlocks = templates.findHBSBlocks
 module.exports.convertToJS = templates.convertToJS
 
-/**
+if (!process.env.NO_JS) {
+  const { VM } = require("vm2")
+  const { setJSRunner } = require("./helpers/javascript")
+  /**
    * Use vm2 to run JS scripts in a node env
    */
-setJSRunner((js, context) => {
+  setJSRunner((js, context) => {
     const vm = new VM({
       sandbox: context,
       timeout: 1000
     })
     return vm.run(js)
-})
+  })
+}

packages/string-templates/src/index.mjs

@@ -21,10 +21,11 @@ export const disableEscaping = templates.disableEscaping
 export const findHBSBlocks = templates.findHBSBlocks
 export const convertToJS = templates.convertToJS
 
-/**
+if (process && !process.env.NO_JS) {
+  /**
    * Use polyfilled vm to run JS scripts in a browser Env
    */
-setJSRunner((js, context) => {
+  setJSRunner((js, context) => {
     context = {
       ...context,
       alert: undefined,
@@ -33,4 +34,5 @@ setJSRunner((js, context) => {
     }
     vm.createContext(context)
     return vm.runInNewContext(js, context, { timeout: 1000 })
-})
+  })
+}