release: open-source release build logic for unix packages

Updates tailscale/corp#9221

Signed-off-by: David Anderson <danderson@tailscale.com>

release/dist/unixpkgs/targets.go

@@ -0,0 +1,116 @@
+package unixpkgs
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+
+	"tailscale.com/release/dist"
+
+	_ "github.com/goreleaser/nfpm/deb"
+	_ "github.com/goreleaser/nfpm/rpm"
+)
+
+func Targets() []dist.Target {
+	var ret []dist.Target
+	for goosgoarch := range tarballs {
+		goos, goarch := splitGoosGoarch(goosgoarch)
+		ret = append(ret, &tgzTarget{
+			goenv: map[string]string{
+				"GOOS":   goos,
+				"GOARCH": goarch,
+			},
+		})
+	}
+	for goosgoarch := range debs {
+		goos, goarch := splitGoosGoarch(goosgoarch)
+		ret = append(ret, &debTarget{
+			goenv: map[string]string{
+				"GOOS":   goos,
+				"GOARCH": goarch,
+			},
+		})
+	}
+	for goosgoarch := range rpms {
+		goos, goarch := splitGoosGoarch(goosgoarch)
+		ret = append(ret, &rpmTarget{
+			goenv: map[string]string{
+				"GOOS":   goos,
+				"GOARCH": goarch,
+			},
+		})
+	}
+
+	// Special case: AMD Geode is 386 with softfloat. Tarballs only since it's
+	// an ancient architecture.
+	ret = append(ret, &tgzTarget{
+		filenameArch: "geode",
+		goenv: map[string]string{
+			"GOOS":   "linux",
+			"GOARCH": "386",
+			"GO386":  "softfloat",
+		},
+	})
+
+	sort.Slice(ret, func(i, j int) bool {
+		return ret[i].String() < ret[j].String()
+	})
+
+	return ret
+}
+
+var (
+	tarballs = map[string]bool{
+		"linux/386":      true,
+		"linux/amd64":    true,
+		"linux/arm":      true,
+		"linux/arm64":    true,
+		"linux/mips64":   true,
+		"linux/mips64le": true,
+		"linux/mips":     true,
+		"linux/mipsle":   true,
+		"linux/riscv64":  true,
+		// TODO: more tarballs we could distribute, but don't currently. Leaving
+		// out for initial parity with redo.
+		// "darwin/amd64":  true,
+		// "darwin/arm64":  true,
+		// "freebsd/amd64": true,
+		// "openbsd/amd64": true,
+	}
+
+	debs = map[string]bool{
+		"linux/386":     true,
+		"linux/amd64":   true,
+		"linux/arm":     true,
+		"linux/arm64":   true,
+		"linux/riscv64": true,
+		// TODO: maybe mipses, we accidentally started building them at some
+		// point even though they probably don't work right.
+		// "linux/mips":     true,
+		// "linux/mipsle":   true,
+		// "linux/mips64":   true,
+		// "linux/mips64le": true,
+	}
+
+	rpms = map[string]bool{
+		"linux/386":     true,
+		"linux/amd64":   true,
+		"linux/arm":     true,
+		"linux/arm64":   true,
+		"linux/riscv64": true,
+		// TODO: maybe mipses, we accidentally started building them at some
+		// point even though they probably don't work right.
+		// "linux/mips":     true,
+		// "linux/mipsle":   true,
+		// "linux/mips64":   true,
+		// "linux/mips64le": true,
+	}
+)
+
+func splitGoosGoarch(s string) (string, string) {
+	goos, goarch, ok := strings.Cut(s, "/")
+	if !ok {
+		panic(fmt.Sprintf("invalid target %q", s))
+	}
+	return goos, goarch
+}