separar runner de cli

cli.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+
+	"gitea.nulo.in/Nulo/repro-run/runner"
+)
+
+func main() {
+	config, err := readConfig()
+	must(err)
+	must(runner.Run(config, "rootfs/", "cache/"))
+}
+
+func must(err error, where ...string) {
+	if err != nil {
+		log.Fatal(err, where)
+	}
+}
+
+func readConfig() (config runner.Config, err error) {
+	err = json.NewDecoder(os.Stdin).Decode(&config)
+	return
+}

config.go

@@ -1,16 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"os"
-)
-
-type Config struct {
-	Command string
-	Cache   []string
-}
-
-func readConfig() (config Config, err error) {
-	err = json.NewDecoder(os.Stdin).Decode(&config)
-	return
-}

runner/config.go

@@ -0,0 +1,6 @@
+package runner
+
+type Config struct {
+	Command string
+	Cache   []string
+}

runner/runner.go

@@ -1,4 +1,4 @@
-package main
+package runner
 
 import (
 	"embed"
@@ -14,14 +14,7 @@ import (
 //go:embed alpine/keys
 var alpineKeys embed.FS
 
-func main() {
+func Run(config Config, rootfs string, cache string) (err error) {
-	config, err := readConfig()
-	must(err)
-	must(run(config, "rootfs/", "cache/"))
-
-}
-
-func run(config Config, rootfs string, cache string) (err error) {
 	if err = os.RemoveAll("rootfs/"); err != nil {
 		return
 	}
@@ -124,9 +117,3 @@ https://dl-cdn.alpinelinux.org/alpine/v3.17/community`), 0600); err != nil {
 
 	return
 }
-
-func must(err error, where ...string) {
-	if err != nil {
-		log.Fatal(err, where)
-	}
-}