fix: podman linux path rename

[MatthewDolan]

The authversion jobs have been failing for the last ~week. Here is an example failure:

fatal: app/auto_version_cmd.go:30: manifest/digest/digest.go:89: failed to compute digest for podman-4.4.0/linux-amd64: manifest/digest/digest.go:161: state/state.go:324: cache/cache.go:149: https://github.com/containers/podman/releases/download/v4.4.0/podman-remote-static.tar.gz: cache/http.go:88: download failed: 404 Not Found (404)

https://github.com/cashapp/hermit-packages/actions/runs/4120270815/jobs/7114826978

I traced the issue back to a change in the artifact names that are uploaded with podman: containers/podman#16667

I think this change to the manifest will fix it.

I tested this locally:

> docker run -it -v ${PWD}:/hermit-packages ubuntu /bin/bash
> apt-get update && apt-get install curl
> curl -fsSL https://github.com/cashapp/hermit/releases/download/stable/install.sh | /bin/bash
> mkdir hermit-test
> cd hermit-test
> ~/bin/hermit init
...
> . ./bin/activate-hermit
Hermit environment /hermit-test activated
> echo 'sources = ["env:///../hermit-packages"]' > bin/hermit.hcl
> hermit install podman-4.4.0
info:podman-4.4.0:install: Installing podman-4.4.0                                                                                                                                                                    > bin/podman --version
podman version 4.4.0
> hermit install podman-4.3.1
info:podman-4.3.1:uninstall: Uninstalling podman-4.4.0
info:podman-4.3.1:install: Installing podman-4.3.1
> bin/podman --version
podman version 4.3.1

I also tested auto-version locally and that appears to be working:

> hermit manifest auto-version podman.hcl

There might be a secondary follow up where the auto-version command shouldn't fail (instead just printing a warning and not updating the manifest) if it's unable to update digests.

[alecthomas]

I haven't looked into this specific case closely, but usually this entails creating two or more version blocks - one with the previous layout and one with the new layout. eg.

version "x" "y" z" {
  // rename
}

version "q" {
  // rename
}

[MatthewDolan]

I fixed it by removing the top-level platform "linux" { ... } block. My expectation for inheritance was a little messed up.

All my testing works now, except that now there's a new issue with v4.4.1: containers/podman#17441

[MatthewDolan]

containers/podman#17441 has been resolved so this is ready for review.

[alecthomas]

Nice!