Add localpack --cwd option

Author: ehmicky

gulp/utils/localpack-code/cli/top.js

@@ -13,11 +13,17 @@ const defineCli = function() {
 }
 
 const CONFIG = {
+  cwd: {
+    string: true,
+    alias: 'c',
+    requiresArg: true,
+    describe: 'Current directory',
+  },
   output: {
     string: true,
     alias: 'o',
     requiresArg: true,
-    describe: 'Where to unpack the package (default: {packageRoot}/localpack/)',
+    describe: 'Where to unpack the package (default: {cwd}/localpack/)',
   },
 }
 

gulp/utils/localpack-code/cwd.js

@@ -0,0 +1,37 @@
+'use strict'
+
+const { cwd: currentCwd } = require('process')
+const assert = require('assert')
+const { stat } = require('fs')
+const { promisify } = require('util')
+
+const pStat = promisify(stat)
+
+// Retrieve current directory, used to compute `packageRoot` and default
+// `output`
+// Can be changed with `options.cwd`
+const getCwd = async function({ cwd }) {
+  if (cwd === undefined) {
+    return currentCwd()
+  }
+
+  await validateCwd({ cwd })
+
+  return cwd
+}
+
+const validateCwd = async function({ cwd }) {
+  assert(typeof cwd === 'string', "option 'cwd' must be a string")
+  assert(cwd !== '', "option 'cwd' must not be an empty string")
+
+  try {
+    const cwdStat = await pStat(cwd)
+    assert(cwdStat.isDirectory(), "option 'cwd' must not be a directory")
+  } catch (error) {
+    throw new Error(`option 'cwd' is invalid: ${error.message}`)
+  }
+}
+
+module.exports = {
+  getCwd,
+}

gulp/utils/localpack-code/main.js

@@ -1,19 +1,22 @@
 // eslint-disable-next-line filenames/match-exported
 'use strict'
 
+const { getCwd } = require('./cwd')
 const { getPackageRoot } = require('./root')
 const { getTempDir, cleanTempDir } = require('./temp')
 const { unpack } = require('./unpack')
 const { addDevChecks } = require('./dev_checks')
 
 // Runs `npm pack` then unpack it to `opts.output`
-const localpack = async function({ output } = {}) {
+const localpack = async function({ cwd, output } = {}) {
+  const cwdA = await getCwd({ cwd })
+
   const [packageRoot, tempDir] = await Promise.all([
-    getPackageRoot(),
+    getPackageRoot(cwdA),
     getTempDir(),
   ])
 
-  const outputA = getOutput({ packageRoot, output })
+  const outputA = getOutput({ cwd: cwdA, output })
 
   await unpack({ packageRoot, tempDir, output: outputA })
 
@@ -24,10 +27,7 @@ const localpack = async function({ output } = {}) {
 }
 
 // Retrieve where package is unpacked
-const getOutput = function({
-  packageRoot,
-  output = `${packageRoot}/${DEFAULT_OUTPUT}`,
-}) {
+const getOutput = function({ cwd, output = `${cwd}/${DEFAULT_OUTPUT}` }) {
   return output
 }
 

gulp/utils/localpack-code/root.js

@@ -6,8 +6,8 @@ const pkgDir = require('pkg-dir')
 const moize = require('moize').default
 
 // Retrieve package root directory
-const getPackageRoot = async function() {
-  const packageRoot = await pkgDir()
+const getPackageRoot = async function(cwd) {
+  const packageRoot = await pkgDir(cwd)
 
   assert(
     packageRoot !== null,