WIP: start porting release logic to GoReleaser

Goals:

- _At least_ the publishing of the artifacts in the same formats as
  previous releases
- Reproducable builds
- SBOM inclusion
- Checksums file inclusion
- Cosign
- SLSA compliant

Signed-off-by: Hidde Beydals <[email protected]>

.goreleaser.yaml

@@ -0,0 +1,108 @@
+# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
+
+project_name: sops
+
+# xref: https://goreleaser.com/customization/build/
+builds:
+  - # ID of the build.
+    id: "binary"
+
+    # Path to the main.go file or package to build.
+    main: ./cmd/sops
+
+    # Binary name.
+    # Can be a path (e.g. `bin/app`) to wrap the binary in a directory.
+    binary: sops
+
+    # Custom flags.
+    # Templates can be used here.
+    # xref: https://goreleaser.com/customization/templates/
+    flags:
+      - v
+
+    # Custom asmflags.
+    # Templates can be used here.
+    # xref: https://goreleaser.com/customization/templates/
+    asmflags: []
+
+    # Custom gcflags.
+    # Templates can be used here.
+    # xref: https://goreleaser.com/customization/templates/
+    gcflags: []
+
+    # Custom ldflags.
+    # Templates can be used here.
+    # xref: https://goreleaser.com/customization/templates/
+    ldflags: []
+
+    # Custom build tags templates, e.g. `osusergo`.
+    tags: []
+
+    # Custom environment variables to be set during the build.
+    # Invalid environment variables will be ignored.
+    # Templates can be used here.
+    # xref: https://goreleaser.com/customization/templates/
+    env:
+      - CGO_ENABLED=0
+
+    # GOOS to build the binary for.
+    # xref: https://golang.org/doc/install/source#environment
+    goos:
+      - linux
+      - darwin
+      - windows
+
+    # GOARCH to build the binary for.
+    # xref: https://golang.org/doc/install/source#environment
+    goarch:
+      - amd64
+      - arm64
+
+    # GOARM to build for when GOARCH is `arm`.
+    # xref: https://golang.org/doc/install/source#environment
+    goarm:
+      - '6'
+      - '7'
+
+    # GOAMD64 to build when GOARCH is amd64.
+    # xref: https://golang.org/doc/install/source#environment
+    goamd64:
+      - v1
+
+    # List of GOOS + GOARCH + GOARM combinations to ignore when creating the
+    # build matrix.
+    ignore: []
+
+    # Modified timestamp on the binary, set to ensure reproducible builds.
+    mod_timestamp: "{{ .CommitTimestamp }}"
+
+# xref: https://goreleaser.com/customization/verifiable_builds/
+gomod:
+  # Proxy a module from proxy.golang.org, making the builds verifiable.
+  # This will only be effective if running against a tag. Snapshots will ignore
+  # this setting.
+  proxy: true
+
+  # If proxy is true, use these environment variables when running `go mod`
+  # commands (namely, `go mod tidy`).
+  env:
+    - GOPROXY=https://proxy.golang.org,direct
+    - GOSUMDB=sum.golang.org
+
+  # Sets the `-mod` flag value.
+  mod: mod
+
+# xref: https://goreleaser.com/customization/checksum/
+checksum:
+  # Template for the checksum file name.
+  # Templates can be used here.
+  # xref: https://goreleaser.com/customization/templates/
+  name_template: "{{ .ProjectName }}_checksums.txt"
+
+  # Algorithm to be used.
+  # Accepted options are sha256, sha512, sha1, crc32, md5, sha224 and sha384.
+  algorithm: sha256
+
+  # IDs of artifacts to include in the checksums file.
+  ids:
+    - binary

Makefile

@@ -2,9 +2,9 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-PROJECT		:= go.mozilla.org/sops/v3
-GO 		:= GOPROXY=https://proxy.golang.org go
-GOLINT 		:= golint
+PROJECT := go.mozilla.org/sops/v3
+GO      := GOPROXY=https://proxy.golang.org go
+GOLINT  := golint
 
 all: test vet generate install functional-tests
 origin-build: test vet generate install functional-tests-all