feat: nix support (#4012)

very, very, very WIP implementation of nixpkgs for GoReleaser.

**Decisions made for this first version:**
- only linux and darwin, arm64, 386 and amd64
- only support pkgs from goreleaser-generated archives
- no support to push into default nixpkgs repository
- no support to automatically add the _maybe_ new pkg to the root
`default.nix`
- the generated nixpkg will be rather verbose, which shouldn't be too
much of an issue as it is autogenerated anyway

**TODOs**:
- [x] macos universal binary support
- [x] custom pkg path (e.g. pkgs/misc/foo/bar/default.nix)
- [x] handle archives with a folder in them
- [x] add more options: postInstall, ??

**Will be handled in future versions**:
- [ ] archives.format=binary support
- [ ] compile from source
- [ ] PR-ing into nixpkgs
- [ ] armv6l-linux & armv7l-linux support

closes #3537

---------

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

.gitattributes

@@ -9,3 +9,7 @@ www/docs/static/schema.json linguist-generated=true
 www/docs/static/schema-pro.json linguist-generated=true
 www/docs/static/releases.json linguist-generated=true
 www/docs/static/releases-pro.json linguist-generated=true
+*.nix.golden linguist-language=Nix
+*.rb.golden linguist-language=Ruby
+*.json.golden linguist-language=JSON
+*.yaml.golden linguist-language=YAML

.github/workflows/build.yml

@@ -48,6 +48,9 @@ jobs:
       - uses: crazy-max/ghaction-upx@v2
         with:
           install-only: true
+      - uses: cachix/install-nix-action@v20
+        with:
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4
         with:
           go-version: stable

.github/workflows/release.yml

@@ -101,6 +101,9 @@ jobs:
       - uses: crazy-max/ghaction-upx@v2
         with:
           install-only: true
+      - uses: cachix/install-nix-action@v20
+        with:
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: dockerhub-login
         if: startsWith(github.ref, 'refs/tags/v')
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v1

.goreleaser.yaml

@@ -189,6 +189,21 @@ brews:
       fish_completion.install "completions/goreleaser.fish"
       man1.install "manpages/goreleaser.1.gz"
 
+nix:
+  - name: goreleaser
+    repository:
+      owner: goreleaser
+      name: nur
+    homepage:  https://goreleaser.com
+    description: Deliver Go binaries as fast and easily as possible
+    license: mit
+    install: |-
+      mkdir -p $out/bin
+      cp -vr ./goreleaser $out/bin/goreleaser
+      installManPage ./manpages/goreleaser.1.gz
+      installShellCompletion ./completions/*
+
+
 aurs:
   - homepage:  https://goreleaser.com
     description: Deliver Go binaries as fast and easily as possible

internal/artifact/artifact.go

@@ -58,6 +58,8 @@ const (
 	UploadableSourceArchive
 	// BrewTap is an uploadable homebrew tap recipe file.
 	BrewTap
+	// Nixpkg is an uploadable nix package.
+	Nixpkg
 	// PkgBuild is an Arch Linux AUR PKGBUILD file.
 	PkgBuild
 	// SrcInfo is an Arch Linux AUR .SRCINFO file.