chore: add goreleaser config and version subcommand

Ships Phase 0.x distribution scaffolding: cross-platform release builds
(darwin/linux × amd64/arm64, CGO-on for pg_query_go) via GoReleaser, and
a `qshape version` subcommand with ldflag-injected version/commit/date.

Homebrew publication is handled manually in the boringsql tap — see
`make update-binary FORMULA=qshape TAG=vX.Y.Z` there.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: radim

.gitignore

@@ -1,4 +1,5 @@
 /bin/
+/dist/
 /qshape
 *.test
 *.out

.goreleaser.yaml

@@ -0,0 +1,73 @@
+version: 2
+
+project_name: qshape
+
+before:
+  hooks:
+    - go mod tidy
+
+# pg_query_go requires CGO, so cross-compilation needs a cross toolchain.
+# In CI we build each OS on its own runner (see .github/workflows/release.yml).
+builds:
+  - id: qshape-darwin
+    main: ./cmd/qshape
+    binary: qshape
+    env:
+      - CGO_ENABLED=1
+    goos: [darwin]
+    goarch: [amd64, arm64]
+    ldflags:
+      - -s -w
+      - -X main.version={{.Version}}
+      - -X main.commit={{.ShortCommit}}
+      - -X main.date={{.Date}}
+  - id: qshape-linux
+    main: ./cmd/qshape
+    binary: qshape
+    env:
+      - CGO_ENABLED=1
+      - 'CC={{- if eq .Arch "arm64" -}}aarch64-linux-gnu-gcc{{- else -}}gcc{{- end -}}'
+    goos: [linux]
+    goarch: [amd64, arm64]
+    ldflags:
+      - -s -w
+      - -X main.version={{.Version}}
+      - -X main.commit={{.ShortCommit}}
+      - -X main.date={{.Date}}
+
+archives:
+  - id: qshape
+    name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    formats: [tar.gz]
+    files:
+      - README.md
+      - LICENSE
+
+checksum:
+  name_template: "checksums.txt"
+
+snapshot:
+  version_template: "{{ incpatch .Version }}-next"
+
+changelog:
+  sort: asc
+  use: github
+  filters:
+    exclude:
+      - "^chore:"
+      - "^docs:"
+      - "^test:"
+      - Merge pull request
+      - Merge branch
+
+release:
+  github:
+    owner: boringsql
+    name: qshape
+  draft: false
+  prerelease: auto
+
+# Homebrew publication is handled manually in the boringsql/homebrew-boringsql
+# tap via `make update FORMULA=qshape TAG=vX.Y.Z` (source-formula convention,
+# matching dryrun / fixturize / regresql). GoReleaser only builds release
+# binaries here; the tap is not auto-pushed.

cmd/qshape/root.go

@@ -18,6 +18,7 @@ func Run() error {
 		captureCmd(),
 		attributeCmd(),
 		regresqlStubCmd(),
+		versionCmd(),
 	)
 	return root.Execute()
 }

cmd/qshape/version.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)
+
+func versionCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Print qshape version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("qshape %s (commit %s, built %s)\n", version, commit, date)
+		},
+	}
+}