feat(pack): add pack-destination config

This will allow users to specify a folder in which to save their
tarballs.

PR-URL: #3420
Credit: @wraithgar
Close: #3420
Reviewed-by: @ruyadorno

docs/content/commands/npm-pack.md

@@ -36,6 +36,13 @@ Whether or not to output JSON data, rather than the normal output.
 
 Not supported by all npm commands.
 
+#### `pack-destination`
+
+* Default: "."
+* Type: String
+
+Directory in which `npm pack` will save tarballs.
+
 #### `workspace`
 
 * Default:

docs/content/using-npm/config.md

@@ -867,6 +867,13 @@ when publishing or changing package permissions with `npm access`.
 If not set, and a registry response fails with a challenge for a one-time
 password, npm will prompt on the command line for one.
 
+#### `pack-destination`
+
+* Default: "."
+* Type: String
+
+Directory in which `npm pack` will save tarballs.
+
 #### `package`
 
 * Default:

lib/pack.js

@@ -3,6 +3,7 @@ const log = require('npmlog')
 const pacote = require('pacote')
 const libpack = require('libnpmpack')
 const npa = require('npm-package-arg')
+const path = require('path')
 
 const { getContents, logTar } = require('./utils/tar.js')
 
@@ -23,7 +24,13 @@ class Pack extends BaseCommand {
 
   /* istanbul ignore next - see test/lib/load-all-commands.js */
   static get params () {
-    return ['dry-run', 'json', 'workspace', 'workspaces']
+    return [
+      'dry-run',
+      'json',
+      'pack-destination',
+      'workspace',
+      'workspaces',
+    ]
   }
 
   /* istanbul ignore next - see test/lib/load-all-commands.js */
@@ -67,9 +74,10 @@ class Pack extends BaseCommand {
     for (const { arg, filename, manifest } of manifests) {
       const tarballData = await libpack(arg, this.npm.flatOptions)
       const pkgContents = await getContents(manifest, tarballData)
+      const tarballFilename = path.resolve(this.npm.config.get('pack-destination'), filename)
 
       if (!dryRun)
-        await writeFile(filename, tarballData)
+        await writeFile(tarballFilename, tarballData)
 
       tarballs.push(pkgContents)
     }

lib/utils/config/definitions.js

@@ -1336,6 +1336,14 @@ define('package-lock-only', {
   flatten,
 })
 
+define('pack-destination', {
+  default: '.',
+  type: String,
+  description: `
+    Directory in which \`npm pack\` will save tarballs.
+  `,
+})
+
 define('parseable', {
   default: false,
   type: Boolean,

tap-snapshots/test/lib/load-all-commands.js.test.cjs

@@ -657,7 +657,7 @@ Usage:
 npm pack [[<@scope>/]<pkg>...]
 
 Options:
-[--dry-run] [--json]
+[--dry-run] [--json] [--pack-destination <pack-destination>]
 [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
 [-ws|--workspaces]
 

tap-snapshots/test/lib/utils/config/definitions.js.test.cjs

@@ -98,6 +98,7 @@ Array [
   "package",
   "package-lock",
   "package-lock-only",
+  "pack-destination",
   "parseable",
   "prefer-offline",
   "prefer-online",

tap-snapshots/test/lib/utils/config/describe-all.js.test.cjs

@@ -746,6 +746,13 @@ when publishing or changing package permissions with \`npm access\`.
 If not set, and a registry response fails with a challenge for a one-time
 password, npm will prompt on the command line for one.
 
+#### \`pack-destination\`
+
+* Default: "."
+* Type: String
+
+Directory in which \`npm pack\` will save tarballs.
+
 #### \`package\`
 
 * Default:

tap-snapshots/test/lib/utils/npm-usage.js.test.cjs

@@ -744,7 +744,7 @@ All commands:
                     npm pack [[<@scope>/]<pkg>...]
                     
                     Options:
-                    [--dry-run] [--json]
+                    [--dry-run] [--json] [--pack-destination <pack-destination>]
                     [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
                     [-ws|--workspaces]
                     

test/lib/pack.js

@@ -1,6 +1,7 @@
 const t = require('tap')
 const mockNpm = require('../fixtures/mock-npm')
 const pacote = require('pacote')
+const path = require('path')
 
 const OUTPUT = []
 const output = (...msg) => OUTPUT.push(msg)
@@ -27,6 +28,7 @@ const mockPacote = {
 t.afterEach(() => OUTPUT.length = 0)
 
 t.test('should pack current directory with no arguments', (t) => {
+  let tarballFileName
   const Pack = t.mock('../../lib/pack.js', {
     libnpmpack,
     npmlog: {
@@ -35,14 +37,46 @@ t.test('should pack current directory with no arguments', (t) => {
       clearProgress: () => {},
     },
     fs: {
-      writeFile: (file, data, cb) => cb(),
+      writeFile: (file, data, cb) => {
+        tarballFileName = file
+        cb()
+      },
+    },
+  })
+  const npm = mockNpm({
+    output,
+  })
+  const pack = new Pack(npm)
+
+  pack.exec([], err => {
+    t.error(err, { bail: true })
+
+    const filename = `npm-${require('../../package.json').version}.tgz`
+    t.strictSame(OUTPUT, [[filename]])
+    t.strictSame(tarballFileName, path.resolve(filename))
+    t.end()
+  })
+})
+
+t.test('follows pack-destination config', (t) => {
+  let tarballFileName
+  const Pack = t.mock('../../lib/pack.js', {
+    libnpmpack,
+    npmlog: {
+      notice: () => {},
+      showProgress: () => {},
+      clearProgress: () => {},
+    },
+    fs: {
+      writeFile: (file, data, cb) => {
+        tarballFileName = file
+        cb()
+      },
     },
   })
   const npm = mockNpm({
     config: {
-      unicode: false,
-      json: false,
-      'dry-run': false,
+      'pack-destination': '/tmp/test',
     },
     output,
   })
@@ -53,10 +87,10 @@ t.test('should pack current directory with no arguments', (t) => {
 
     const filename = `npm-${require('../../package.json').version}.tgz`
     t.strictSame(OUTPUT, [[filename]])
+    t.strictSame(tarballFileName, path.resolve('/tmp/test', filename))
     t.end()
   })
 })
-
 t.test('should pack given directory', (t) => {
   const testDir = t.testdir({
     'package.json': JSON.stringify({