Progress on plugin loading

cmd/stepd/main.go

@@ -41,6 +41,9 @@ func main () {
 	flagDirectories := cli.NewFlag (
 		'd', "directories",
 		"Serve the contents of directories.")
+	flagUnsafePlugins := cli.NewFlag (
+		0, "unsafe-plugins",
+		"Load plugins not owned by the root user.")
 	cmd := cli.New (
 		"Run an HTTP server that automaticaly executes STEP files.",
 		flagPidFile,
@@ -48,10 +51,24 @@ func main () {
 		flagHTTPErrorDocument,
 		flagHTTPDirectoryDocument,
 		flagDirectories,
+		flagUnsafePlugins,
 		cli.NewHelp())
 	cmd.Syntax = "[OPTIONS]... [DIRECTORY]"
 	cmd.ParseOrExit(os.Args)
-	
+
+	// get env variables
+	pluginPath := filepath.SplitList(os.Getenv("STEP_PLUGIN_PATH"))
+	if len(pluginPath) == 0 {
+		pluginPath = []string {
+			"/usr/lib/step/plugins",
+			"/usr/local/lib/step/plugins",
+		}
+	}
+	for index, pat := range pluginPath {
+		pluginPath[index], _ = filepath.Abs(pat)
+	}
+
+	// log header for telling apart separate program runs
 	log.Println(`==========| STEP |===========`)
 	log.Println(`Scriptable Template Processor`)
 	log.Println(`... initializing`)
@@ -115,21 +132,21 @@ func main () {
 	err := environment.Init(context.Background())
 	if err != nil { log.Fatal(err) }
 
-	// TODO: load plugins
-	pluginPath := os.Getenv("STEP_PLUGIN_PATH")
-	if pluginPath == "" {
-		pluginPath = "/usr/lib/step/plugins:/usr/local/lib/step/plugins"
-	}
-	for _, pat := range filepath.SplitList(pluginPath) {
+	// load plugins
+	for _, pat := range pluginPath {
 		entries, err := os.ReadDir(pat)
 		if err != nil { continue }
 		for _, entry := range entries {
 			pluginPath := filepath.Join(pat, entry.Name())
-			_, err := environment.LoadProviderPlugin(pat)
+			ext := filepath.Ext(pluginPath)
+			if ext != ".so" { continue }
+			if flagUnsafePlugins.Value == "true" {
+				_, err = environment.LoadProviderPluginUnsafe(pluginPath)
+			} else {
+				_, err = environment.LoadProviderPlugin(pluginPath)
+			}
 			if err != nil {
-				log.Printf (
-					"!!! could not load plugin %s: %v",
-					pluginPath, err)
+				log.Println("!!!", err)
 			}
 		}
 	}
@@ -197,6 +214,18 @@ func (this *httpServerRoutine) Run (ctx context.Context) error {
 func logProviders (providers []step.Provider) {
 	output := "providers: "
 	x := utf8.RuneCountInString(output)
+	first := true
+	line := func () {		
+		if output == "" { return }
+		if first {
+			first = false
+			log.Println("(i)", output)
+		} else {
+			log.Println("   ", output)
+		}
+		output = ""
+		x = 0
+	}
 	for index, provider := range providers {
 		packag := provider.Package()
 		if index != len(providers) - 1 {
@@ -204,16 +233,11 @@ func logProviders (providers []step.Provider) {
 			x += 2
 		}
 		packageLen := utf8.RuneCountInString(packag)
-		if x + packageLen >= 60 && output != "" {
-			log.Println("(i)", output)
-			output = ""
-			x = 2
-			continue
+		if x + packageLen >= 60 {
+			line()
 		}
 		output += packag
 		x += packageLen
 	}
-	if output != "" {
-		log.Println("(i)", output)
-	}
+	line()
 }

environment.go

@@ -129,7 +129,7 @@ func (this *Environment) LoadProviderPluginUnsafe (name string) (Provider, error
 func (this *Environment) loadProviderPlugin (name string, checkRoot bool) (Provider, error) {
 	plugin, err := this.loadPlugin(name, checkRoot)
 	if err != nil { return nil, err }
-	providerSymbol, err := plugin.Lookup("Provider")
+	providerSymbol, err := plugin.Lookup("NewProvider")
 	if err != nil { return nil, err }
 	providerFactory, ok := providerSymbol.(func () Provider)
 	if !ok { return nil, ErrPluginBadSymbol }