Stub out pm package create

cmd/pm/main.go

@@ -6,6 +6,7 @@ import (
 	"os"
 
 	"mcquay.me/pm/keyring"
+	"mcquay.me/pm/pkg"
 )
 
 const usage = `pm: simple, cross-platform system package manager
@@ -13,6 +14,7 @@ const usage = `pm: simple, cross-platform system package manager
 subcommands:
   environ    (env) -- print environment information
   keyring    (key) -- interact with pm's OpenPGP keyring
+  package    (pkg) -- create packages
 `
 
 const keyUsage = `pm keyring: interact with pm's OpenPGP keyring
@@ -27,6 +29,12 @@ subcommands:
   verify      (v)  --  verify a detached signature
 `
 
+const pkgUsage = `pm package: generate pm-compatible packages
+
+subcommands:
+  create      (c)  --  create a fresh keypair
+`
+
 func main() {
 	if len(os.Args) < 2 {
 		fatalf("pm: missing subcommand\n\n%v", usage)
@@ -130,6 +138,27 @@ func main() {
 		default:
 			fatalf("unknown keyring subcommand: %q\n\nusage: %v", sub, keyUsage)
 		}
+	case "package", "pkg":
+		if len(os.Args[1:]) < 2 {
+			fatalf("pm package: insufficient args\n\nusage: %v", pkgUsage)
+		}
+		sub := os.Args[2]
+		switch sub {
+		case "create", "creat", "c":
+			if signID == "" {
+				fatalf("must set PM_PGP_ID\n")
+			}
+			args := os.Args[3:]
+			if len(args) != 1 {
+				fatalf("usage: pm package create <directory>\n")
+			}
+			dir := args[0]
+			if err := pkg.Create(dir, signID); err != nil {
+				fatalf("creating package: %v\n", err)
+			}
+		default:
+			fatalf("unknown package subcommand: %q\n\nusage: %v", sub, pkgUsage)
+		}
 	default:
 		fatalf("uknown subcommand %q\n\nusage: %v", cmd, usage)
 	}

pkg/pkg.go

@@ -0,0 +1,8 @@
+package pkg
+
+import "fmt"
+
+// Create traverses the contents of dir and emits a valid pkg, signed by id
+func Create(dir, id string) error {
+	return fmt.Errorf("creating package from %q for %q: NYI", dir, id)
+}