add checks before generating and adding policy files

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

gopher/main.go

@@ -21,13 +21,18 @@ func setup() {
 	footer = buildFooter(*footerText)
 	gophermapRegex = compileGophermapRegex()
 
-	// Generate capability files
+	// Add generated files to cache if not present
-	capsTxt := generateCapsTxt(*desc, *admin, *geo)
+	p := core.NewPath(core.Root, "caps.txt")
-	robotsTxt := generateRobotsTxt()
+	if _, err := core.FileSystem.StatFile(p); err != nil {
+		core.SystemLog.Info("Policy file %s not found! Generating...", p.Absolute())
+		core.FileSystem.AddGeneratedFile(p, generateCapsTxt(*desc, *admin, *geo))
+	}
 
-	// Add generated files to cache
+	p = core.NewPath(core.Root, "robots.txt")
-	core.FileSystem.AddGeneratedFile(core.NewPath(core.Root, "caps.txt"), capsTxt)
+	if _, err := core.FileSystem.StatFile(p); err != nil {
-	core.FileSystem.AddGeneratedFile(core.NewPath(core.Root, "robots.txt"), robotsTxt)
+		core.SystemLog.Info("Policy file %s not found! Generating...", p.Absolute())
+		core.FileSystem.AddGeneratedFile(p, generateRobotsTxt())
+	}
 }
 
 // Run does as says :)