[BUG] `npm pack <git-dependency>#<commit-hash>` fails in npm >= 9.6.5

[chmeliik]

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

npm pack with a specific commit of a git dependency fails as follows:

$ npm pack vercel/ms#1304f150b38027e0818cc122106b5c7322d68d0c                                   
npm ERR! GitFetcher requires an Arborist constructor to pack a tarball

npm ERR! A complete log of this run can be found in: /home/acmiel/.npm/_logs/2023-08-21T08_27_53_861Z-debug-0.log

Expected Behavior

Expected npm pack to succeed (like it does in version <= 9.6.4).

Note that it still works for things that are not commit hashes:

$ npm pack vercel/ms#3.0.0-canary.1
...
ms-3.0.0-canary.1.tgz

Steps To Reproduce

1. With npm version 9.6.5 or higher
2. Run npm pack vercel/ms#1304f150b38027e0818cc122106b5c7322d68d0c or any other git dependency + commit hash
3. And get npm ERR! GitFetcher requires an Arborist constructor to pack a tarball

Environment

• npm: 9.8.1
• Node.js: 18.17.1
• OS Name: Fedora 37
• System Model Name: Lenovo ThinkPad X1 Carbon
• npm config:

; node bin location = /usr/bin/node-18
; node version = v18.17.1
; npm local prefix = /tmp/test
; npm version = 9.8.1
; cwd = /tmp/test
; HOME = /home/acmiel
; Run `npm config ls -l` to show all defaults.

[chmeliik]

So, I think I've found the problem.

npm pack calls pacote.manifest() without passing in an Arborist (why would it, it's just getting a package.json)

cli/lib/commands/pack.js

Line 37 in 6ec6ff0

const manifest = await pacote.manifest(spec, this.npm.flatOptions)

For a git dependency which is "hosted" and resolved, GitFetcher.manifest uses FileFetcher.manifest instead

cli/node_modules/pacote/lib/git.js

Lines 312 to 313 in 6ec6ff0

	return this.spec.hosted && this.resolved
	? FileFetcher.prototype.manifest.apply(this)

FileFetcher.manifest calls extract()

cli/node_modules/pacote/lib/file.js

Lines 27 to 28 in 6ec6ff0

	return cacache.tmp.withTmp(this.cache, this.opts, dir =>
	this.extract(dir)

extract calls _tarballFromResolved

cli/node_modules/pacote/lib/fetcher.js

Line 331 in 6ec6ff0

streamHandler(this[_istream](this[_tarballFromResolved]()))

And finally, GitFetcher's _tarballFromResolved does a full clone, prepare and would go on to do pretty much an entire pack operation if not for the missing Arborist error

cli/node_modules/pacote/lib/git.js

Lines 209 to 213 in 6ec6ff0

	this[_clone](dir => this[_prepareDir](dir)
	.then(() => new Promise((res, rej) => {
	if (!this.Arborist) {
	throw new Error('GitFetcher requires an Arborist constructor to pack a tarball')
	}

[chmeliik]

I think the fix is to remove the FileFetcher.manifest usage and always just clone

       return Promise.resolve(this.package)
     }
 
-    return this.spec.hosted && this.resolved
-      ? FileFetcher.prototype.manifest.apply(this)
-      : this[_clone](dir =>
+    return this[_clone](dir =>
         this[_readPackageJson](dir + '/package.json')
           .then(mani => this.package = {
             ...mani,

Would anyone happen to know why FileFetcher.manifest was used in the first place?

[itavero]

I'm getting the same error when trying to use npm exec / npx with a commit hash on npm 10.7.0.
Should this already have been fixed (as I do see some referenced issues thath ave been closed)?

[milaninfy]

evidently it works for short commit hash format and fails for long one.

~/workarea/npm-cli $ npx npm/cli#ec105f400281a5bfd17885de1ea3d54d0c231b27 -v
npm error GitFetcher requires an Arborist constructor to pack a tarball
npm error A complete log of this run can be found in: /Users/milaninfy/.npm/_logs/2024-08-30T17_55_32_028Z-debug-0.log

~/workarea/npm-cli $ npx npm/cli#ec105f4 -v                                 
Need to install the following packages:
github:npm/cli#ec105f4
Ok to proceed? (y) y

10.8.3