refactor: first pass at rewriting apps plugin in go

plugins/apps/apps.go

@@ -0,0 +1,32 @@
+package apps
+
+import (
+	"github.com/dokku/dokku/plugins/common"
+)
+
+// ReportSingleApp is an internal function that displays the app report for one or more apps
+func ReportSingleApp(appName, infoFlag string) error {
+	if err := common.VerifyAppName(appName); err != nil {
+		return err
+	}
+
+	deploySource := ""
+	if b, err := common.PlugnTriggerSetup("deploy-source", []string{appName}...).SetInput("").Output(); err != nil {
+		deploySource = string(b[:])
+	}
+
+	locked := "false"
+	if appIsLocked(appName) {
+		locked = "true"
+	}
+
+	infoFlags := map[string]string{
+		"--app-dir":           common.AppRoot(appName),
+		"--app-deploy-source": deploySource,
+		"--app-locked":        locked,
+	}
+
+	trimPrefix := false
+	uppercaseFirstCharacter := true
+	return common.ReportSingleApp("app", appName, infoFlag, infoFlags, trimPrefix, uppercaseFirstCharacter)
+}