remote signing help

cmd/byre/main.go

@@ -20,13 +20,15 @@ func main() {
 		checkCmd()
 	case "run":
 		runCmd(os.Args[2:])
+	case "signing":
+		signingCmd(os.Args[2:])
 	default:
 		usage()
 	}
 }
 
 func usage() {
-	fmt.Fprintln(os.Stderr, "usage: byre serve | byre install | byre check | byre run [--resume ID]")
+	fmt.Fprintln(os.Stderr, "usage: byre serve | byre install | byre check | byre run [--resume ID] | byre signing CHECKOUT")
 	os.Exit(2)
 }
 

cmd/byre/signing.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+func signingCmd(args []string) {
+	if len(args) != 1 {
+		usage()
+	}
+	checkout := args[0]
+	common := gitOut(checkout, "rev-parse", "--path-format=absolute", "--git-common-dir")
+	if gitOut(checkout, "rev-parse", "--path-format=absolute", "--git-dir") != common {
+		fatal("checkout is a linked worktree; run byre signing on its main checkout", "checkout", checkout)
+	}
+	unsigned := filepath.Join(common, "unsigned.gitconfig")
+	gitOut(checkout, "config", "commit.gpgsign", "true")
+	gitOut(checkout, "config", "--file", unsigned, "commit.gpgsign", "false")
+	gitOut(checkout, "config", "includeIf.gitdir:"+filepath.Join(common, "worktrees")+"/**.path", "unsigned.gitconfig")
+	signing := gitOut(checkout, "config", "--type=bool", "--get", "commit.gpgsign")
+	if signing != "true" {
+		fatal("checkout's commit.gpgsign is not true after setting it", "checkout", checkout, "value", signing)
+	}
+	fmt.Printf("%s: commit.gpgsign %s\n", checkout, signing)
+	fmt.Printf("%s/worktrees/*: commit.gpgsign %s\n", common, gitOut(checkout, "config", "--file", unsigned, "--type=bool", "--get", "commit.gpgsign"))
+}
+
+func gitOut(dir string, args ...string) string {
+	cmd := exec.Command("git", args...)
+	cmd.Dir = dir
+	cmd.Stderr = os.Stderr
+	out, err := cmd.Output()
+	if err != nil {
+		fatal("git failed", "args", strings.Join(args, " "), "err", err)
+	}
+	return strings.TrimSpace(string(out))
+}