Untangle the spaghetti. Slightly.

gerritcp.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/config"
 	"gopkg.in/yaml.v2"
 )
 
@@ -29,43 +27,7 @@ func main() {
 		panic(fmt.Sprintf("Failed parsing '%s': %s", *configFile, err))
 	}
 
-	_, err = git.PlainClone(*dir, true, &git.CloneOptions{
-		URL:          cfg.Sites.Upstream.FullURL(),
-		Auth:         nil,
-		RemoteName:   "upstream",
-		SingleBranch: false,
-		NoCheckout:   true,
-	})
-	if err != nil && err != git.ErrRepositoryAlreadyExists {
-		panic(err)
-	}
-
-	repo, err := git.PlainOpen(*dir)
-	if err != nil {
-		panic(err)
-	}
-
-	_, err = repo.CreateRemote(&config.RemoteConfig{
-		Name: "downstream",
-		URLs: []string{cfg.Sites.Downstream.FullURL()},
-	})
-	if err != nil && err != git.ErrRemoteExists {
-		panic(err)
-	}
-
-	err = repo.Fetch(&git.FetchOptions{
-		RemoteName: "upstream",
-	})
-	if err != nil && err != git.NoErrAlreadyUpToDate {
-		panic(err)
-	}
-
-	err = repo.Fetch(&git.FetchOptions{
-		RemoteName: "downstream",
-	})
-	if err != nil && err != git.NoErrAlreadyUpToDate {
-		panic(err)
-	}
+	repo := openRepo(dir, cfg)
 
 	fmt.Println(repo)
 }

repo.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/config"
+)
+
+func openRepo(dir *string, cfg *configFormat) *git.Repository {
+	_, err := git.PlainClone(*dir, true, &git.CloneOptions{
+		URL:          cfg.Sites.Upstream.FullURL(),
+		Auth:         nil,
+		RemoteName:   "upstream",
+		SingleBranch: false,
+		NoCheckout:   true,
+	})
+	if err != nil && err != git.ErrRepositoryAlreadyExists {
+		panic(err)
+	}
+
+	repo, err := git.PlainOpen(*dir)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = repo.CreateRemote(&config.RemoteConfig{
+		Name: "downstream",
+		URLs: []string{cfg.Sites.Downstream.FullURL()},
+	})
+	if err != nil && err != git.ErrRemoteExists {
+		panic(err)
+	}
+
+	err = repo.Fetch(&git.FetchOptions{
+		RemoteName: "upstream",
+	})
+	if err != nil && err != git.NoErrAlreadyUpToDate {
+		panic(err)
+	}
+
+	err = repo.Fetch(&git.FetchOptions{
+		RemoteName: "downstream",
+	})
+	if err != nil && err != git.NoErrAlreadyUpToDate {
+		panic(err)
+	}
+
+	return repo
+}