Install and use win native gpg port for CI integration tests

[ikappaki]

Hi,

Could you please review this patch that fixes a recent issue causing the GitHub CI integration tests to fail on MS-Windows?

The problem is that Emacs cannot validate the signatures of the GNU and NonGNU packages because the MSYS2 gpg executable available on the Windows runner does not handle native Windows paths correctly. The fix installs a native Windows port of gpg via Scoop and ensures it appears first in the PATH.

It’s unclear to me how this ever worked on the Windows runner before. Although GitHub recently upgraded to the windows-2025 image, I don’t see any relevant differences in the available tools compared to the previous windows-2022 runner, which also fails with the same error.

Thanks

error (for ref):

[00:00.016]  Started up on Wed Oct 22 14:11:29 2025
[00:00.016]  Running on GNU Emacs 30.1 (build 2, x86_64-w64-mingw32) of 2025-02-23
[00:00.016]  Emacs source is unknown
[00:00.016]  Project directory: `d:/a/cider/cider/'
[00:00.016]  No file `c:/Users/runneradmin/AppData/Roaming/.config/eldev/config', not applying user-specific configuration
[00:00.016]  Loading file `Eldev'...
[00:00.122]  Using package archive `gnu' at `https://elpa.gnu.org/packages/' with priority 300
[00:00.122]  Using package archive `melpa-unstable' at `https://melpa.org/packages/' with priority 100
[00:00.154]  Reading target dependencies from file `.eldev/30.1/target-dependencies.build'...
[00:00.158]  Target dependency information is up-to-date, not saving...
[00:00.159]  No file `Eldev-local', not customizing build
[00:00.161]  Executing command `test'...
[00:00.161]  Executing `eldev-executing-command-hook'...
[00:00.161]  Executing `eldev-test-hook'...
[00:00.161]  Using cider tests of type `integration'
[00:00.162]  Contents of package archive `gnu' has been fetched already
[00:00.162]  Contents of package archive `melpa-unstable' has been fetched already
[00:00.334]  Will refetch contents of package archive `gnu' to make sure that `melpa-unstable' really needs to be used
[00:00.336]  Fetching contents of package archive `gnu'...
[00:00.578]  Using file `https://elpa.gnu.org/packages/archive-contents' from the global cache (at `c:/Users/runneradmin/AppData/Roaming/.cache/eldev/global-cache/gnu/archive-contents')...
[00:00.662]  File `https://elpa.gnu.org/packages/archive-contents.sig' is not cached, retrieving...
[00:02.197]  Installing package `gnu-elpa-keyring-update' to hopefully solve `bad-signature' problem...
[00:02.198]  Using file `https://elpa.gnu.org/packages/archive-contents' from the global cache (at `c:/Users/runneradmin/AppData/Roaming/.cache/eldev/global-cache/gnu/archive-contents')...
[00:02.332]  File `https://elpa.gnu.org/packages/queue-0.2.tar' is not cached, retrieving...
[00:02.442]  File `https://elpa.gnu.org/packages/queue-0.2.tar.sig' is not cached, retrieving...
[00:02.776]  Installing package `gnu-elpa-keyring-update' to hopefully solve `bad-signature' problem...
[00:02.951]  Using file `https://melpa.org/packages/archive-contents' from the global cache (at `c:/Users/runneradmin/AppData/Roaming/.cache/eldev/global-cache/melpa-unstable/archive-contents')...
[00:03.080]  Using file `https://elpa.gnu.org/packages/archive-contents' from the global cache (at `c:/Users/runneradmin/AppData/Roaming/.cache/eldev/global-cache/gnu/archive-contents')...
[00:03.259]  File `https://elpa.gnu.org/packages/queue-0.2.tar' is not cached, retrieving...
[00:03.398]  File `https://elpa.gnu.org/packages/queue-0.2.tar.sig' is not cached, retrieving...
[00:02.331]  [1/3] Installing package `queue' (0.2) from `gnu'...
[00:04.222]  Debugger entered--Lisp error: (bad-signature "queue-0.2.tar.sig")
               signal(bad-signature ("queue-0.2.tar.sig"))```

-----------------

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[alexander-yakushev]

Whatever fixes the CI tests is fly in my book! Thank you!