Setup goreleaser to update homebrew

[baduker]

This pull request introduces the brews section to the GoReleaser configuration file for the Exercism project.
The added brews section defines the Homebrew formula for Exercism project which will automate the process of updating the Homebrew package whenever a new release is created on GitHub.

This fixes issue #1102.

[github-actions]

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[ErikSchierboom]

is there any way we can test this?

[baduker]

As far as I'm concerned, I am not aware of a way to explicitly test brews section locally. However, I use this

goreleaser release --snapshot --clean --verbose

Running this command with the proposed changes should give you verbose output, including a section on homebrew tap formula. Speaking of which, it's called repository now as brews.tap is deprecated. To reproduce run goreleaser check and read https://goreleaser.com/deprecations#brewstap

Note: I need to comment out this section:

#signs:
#  - artifacts: checksum
#    args: ["--batch", "-u", "{{ .Env.GPG_FINGERPRINT }}", "--output", "${signature}", "--detach-sign", "${artifact}"]

As I don't have access to Env.GPG_FINGERPRINT and without this gpg complains and goreleaser fails locally.

Running the above command with the proposed changes in this PR, gives me the following (redacted for brevity):

[output shortened]

• homebrew tap formula
    • token type                                     type=github
    • calculating checksum for dist/exercism-0.0.0-SNAPSHOT-83a63ba-linux-armv6.tar.gz
    • guessing install                               install=[bin.install "exercism"]
    • calculating checksum for dist/exercism-0.0.0-SNAPSHOT-83a63ba-linux-x86_64.tar.gz
    • guessing install                               install=[bin.install "exercism"]
    • calculating checksum for dist/exercism-0.0.0-SNAPSHOT-83a63ba-darwin-x86_64.tar.gz
    • guessing install                               install=[bin.install "exercism"]
    • calculating checksum for dist/exercism-0.0.0-SNAPSHOT-83a63ba-linux-arm64.tar.gz
    • guessing install                               install=[bin.install "exercism"]
    • calculating checksum for dist/exercism-0.0.0-SNAPSHOT-83a63ba-darwin-arm64.tar.gz
    • guessing install                               install=[bin.install "exercism"]
    • writing                                        formula=dist/homebrew/Formula/exercism.rb
    • added new artifact                             name=exercism.rb type=Brew Tap path=dist/homebrew/Formula/exercism.rb

[output shortened]

This indicates that the brews section is being processed correctly and the actual versioned release should generate and publish a homebrew-tap recipe into a repository.

[ErikSchierboom]

Well, we'll see when we do a release then! Excited about this

[ErikSchierboom]

@baduker Unfortunately, the homebrew part failed: https://github.com/exercism/cli/actions/runs/7912951304/job/21600762816 How do we fix it?

[ErikSchierboom]

PR submitted to fix this: #1130

[baduker]

@ErikSchierboom this should fix the homebrew issue: 1e1623a