[BUG] npm v9.0.0: src/, dist/ was not packed

[aladdin-add]

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

Current Behavior

  "files": [
    "./src/",
    "./dist/"
  ],

➜  dn git:(main) npm pack
npm notice 
npm notice 📦  @dian/dn@0.5.19
npm notice === Tarball Contents === 
npm notice 2.6kB README.md   
npm notice 2.6kB package.json
npm notice === Tarball Details === 
npm notice name:          @dian/dn                                
npm notice version:       0.5.19                                  
npm notice filename:      @dian/dn-0.5.19.tgz                     
npm notice package size:  2.4 kB                                  
npm notice unpacked size: 5.2 kB                                  
npm notice shasum:        7da9625b31463f5fe420732e6e0d428a885a1ae2
npm notice integrity:     sha512-/FDJumc6JZIIl[...]I+P00TGf9VRPw==
npm notice total files:   2                                       
npm notice 
dian-dn-0.5.19.tgz

Expected Behavior

the files in "src/" and "dist/" should be packed.
I've confirmed it's working fine with npm v8.

Steps To Reproduce

1. In this environment...
2. With this config...
3. Run '...'
4. See error...

Environment

• npm: 9.0.0
• Node.js: v19.0.0
• OS Name: macos
• System Model Name:
• npm config:

; copy and paste output from `npm config ls` here

[wraithgar]

The files array does not support the leading ./, if you remove them it should work.

The entries in files are not paths, they are glob patterns. https://docs.npmjs.com/cli/configuring-npm/package-json#files

[wraithgar]

~/D/n/s/pack $ cat package.json
{
  "name": "pack",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "files": [
    "src/",
    "dist/"
  ],
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "Gar <gar+npm@danger.computer>",
  "license": "ISC"
}
~/D/n/s/pack $ npm pack --dry-run
npm notice 
npm notice 📦  pack@1.0.0
npm notice === Tarball Contents === 
npm notice 0B   dist/foo    
npm notice 289B package.json
npm notice 0B   src/bar     

[aladdin-add]

sounds a regression: #4850 (comment)

I didn't see it was mentioned in the release note, if you want it to be a breaking change.

[wraithgar]

It was introduced in npm@9 w/ the packlist refactor. cc @nlf