pubspec.lock paths are incompatible on Windows

[creativecreatorormaybenot]

Environment

Pub 2.14.0-edge.a527411e5100a0a4f48c4009087a1b988aa784af
Dart SDK version: 2.14.0-edge.a527411e5100a0a4f48c4009087a1b988aa784af (be) (Fri May 14 15:47:38 2021) on "windows_x64"

Problem

When using dart pub run build_runner build (using the build_runner package), the command immediately crashed because:

Could not find a file named "pubspec.yaml" in "Pub\Cache\git\foo-<git-hash>\packages%5Cbar".

The pubspec.yaml for this package looks like this:

dev_dependencies:
  foo:
    git:
      url: [email protected]:user/repo.git
      path: packages/bar
      ref: some-tag

The generated pubspec.lock for this package looks like this:

  foo:
    dependency: "direct dev"
    description:
      path: "packages\\bar"
      ref: "some-tag"
      resolved-ref: <git-tag>
      url: "[email protected]:user/repo.git"
    source: git
    version: "0.1.1"

And here it was immediately obvious to me: packages\\bar was the culprit.

Expected behavior

1. The path in the pubspec.lock should be a forward slash (packages/bar) as the lock file should be version controlled for apps, which means that non-Windows users should use the same lock file.
2. The end result should be that flutter pub run build_runner build works :)

Actual behavior

Could not find a file named "pubspec.yaml" in "Pub\Cache\git\foo-<git-hash>\packages%5Cbar".

Workaround

I figured out a workaround solution:

1. Manually change the path from packages\\bar to packages/bar in the pubspec.lock file.
2. Success (flutter pub run build_runner build runs successfully).

[jonasfj]

Hmm, it seems reasonable that pubspec.lock is consistent across platforms.

[technolion]

Please also see dart-lang/build#3137

[ZeroOneTV]

@creativecreatorormaybenot
I understand how you explained it and it really applies to my case. However, when I run the command: pub run build_runner build , it says that the file has changed and that I should run pub get again.
How do I get around this problem?

[creativecreatorormaybenot]

@ZeroOneTV For me, it is enough to run pub get get again and then only change these lines (or 2 characters).
This does not seem to change the integrity of the file.

But I do also agree that this is a big issue and should be prioritized in some way because it basically breaks the functionality.

[ZeroOneTV]

@ZeroOneTV For me, it is enough to run pub get get again and then only change these lines (or 2 characters).
This does not seem to change the integrity of the file.

But I do also agree that this is a big issue and should be prioritized in some way because it basically breaks the functionality.

This is before modification:

After change line:

[creativecreatorormaybenot]

@ZeroOneTV I have seen the error, but it does not consistently appear for me as I said.

I suggest you can create an issue on build_runner, so they can prioritize this 👍

[ZeroOneTV]

@ZeroOneTV I have seen the error, but it does not consistently appear for me as I said.

I suggest you can create an issue on build_runner, so they can prioritize this 👍

Thank you friend, I will create an issue related to this at the latest until tomorrow 👍

[natebosch]

cc @sigurdm - do you understand from the description above where the bug is here? Is this something we need to prioritize before the next stable SDK release?

[sigurdm]

Yeah - it is a regression introduced by 86bf8b2 . I will try to work on a fix.

[ZeroOneTV]

As @natebosch mentioned in the issue I opened, here would be the best place to present my error
In my case, the situation is this:

Problem information

• Windows 10 Pro • Version 20H2 (Compilation 19042.1110)
• Flutter 2.5.0-1.0.pre • channel dev • https://github.com/flutter/flutter.git
• Framework • revision 184e5871be (4 days ago) • 2021-07-26 04:38:02 -0400
• Engine • revision a877f6fed6
• Tools • Dart SDK version: 2.14.0-350.0.dev (dev) (Fri Jul 23 20:45:53 2021 -0700) on "windows_x64"
• build_runner version: "2.0.6"
• json_serializable: ^4.1.0 || mockito: ^5.0.11 || moor_generator: ^4.4.1 || using theses builds

Making use of these packages mentioned, i'm currently trying to run build_runner to generate the .g models and mocks for testing.
But, when I run flutter pub run build_runner build --delete-conflicting-outputs or dart run build_runner build --delete-conflicting-outputs

I get the following error:

Could not find a file named "pubspec.yaml" in "C:\Users\Zero\AppData\Local\Pub\Cache\git\flutter_plugins-fe50c5bb70cde2cbec931f082aabad229e8003d7\packages%5Cequalizer".
pub finished with exit code 66 

Could not find a file named "pubspec.yaml" in "C:\Users\Zero\AppData\Local\Pub\Cache\git\flutter_plugins-fe50c5bb70cde2cbec931f082aabad229e8003d7\packages%5Cequalizer".

I tried to remove the backslash from pubspec.lock file but I get the error:

The pubspec.lock file has changed since the .packages file was generated, please run "pub get" again.
pub finished with exit code 65

This error occurs on flutter channel:

• Dev
• Beta
• Master

The only one in which the build is possible without major problems is the Stable channel.

[Sese-Schneider]

FYI for anyone finding this issue:

Fixed (CP) in the newest version of the stable Dart SDK.
dart-lang/sdk#47186 (comment)

[enloc-port]

In my case, the reason for this problem was that I used to pull the packges using flutter pub get, but I ran build_runner with dart run build_runner .... But flutter and dart use different working directories.

So be sure to run build_runner with the same command as the one you pulled the packages with.