make gopass mount store idem-potent

src/main/kotlin/org/domaindrivenarchitecture/provs/desktop/infrastructure/Gopass.kt

@@ -71,8 +71,13 @@ fun Prov.configureGopass(gopassRootFolder: String? = null, publicGpgKey: Secret?
 }
 
 
-fun Prov.gopassMountStore(storeName: String, path: String) = task {
+fun Prov.gopassMountStore(storeName: String, path: String) = taskWithResult {
-    cmd("gopass mounts add $storeName $path")
+    val mounts = cmdNoEval("gopass mounts").out ?: return@taskWithResult ProvResult(false, err = "could not determin gopass mounts")
+    if (mounts.contains(storeName)) {
+        ProvResult(true, out = "Store $storeName already mounted.")
+    } else {
+        cmd("gopass mounts add $storeName $path")
+    }
 }
 
 

src/test/kotlin/org/domaindrivenarchitecture/provs/desktop/infrastructure/GopassKtTest.kt

@@ -41,6 +41,7 @@ internal class GopassKtTest {
             configureGopass(prov.userHome() + gopassRootDir)
             gopassInitStoreFolder("~/exampleStoreFolder")
             gopassMountStore("exampleStore", "~/exampleStoreFolder")
+            gopassMountStore("exampleStore", "~/exampleStoreFolder")  // check that mounting twice gives no error
             prov.cmd("gopass ls")
         }