external plugins can now request for dependencies

operator-plugin.go

@@ -5,9 +5,7 @@
 package expr
 
 import (
-	"fmt"
 	"io"
-	"plugin"
 )
 
 //-------- plugin term
@@ -22,48 +20,6 @@ func newPluginTerm(tk *Token) (inst *term) {
 	}
 }
 
-func importPlugin(ctx ExprContext, dirList []string, name string) (err error) {
-	var filePath string
-	var p *plugin.Plugin
-	var sym plugin.Symbol
-	var moduleName string
-	var importFunc func(ctx ExprContext)
-	var ok bool
-
-	decoratedName := fmt.Sprintf("expr-%s-plugin.so", name)
-
-	if filePath, err = makeFilepath(decoratedName, dirList); err != nil {
-		return
-	}
-
-	if p, err = plugin.Open(filePath); err != nil {
-		return
-	}
-
-	if sym, err = p.Lookup("MODULE_NAME"); err != nil {
-		return
-	}
-
-	if moduleName = *sym.(*string); moduleName == "" {
-		err = fmt.Errorf("plugin %q does not provide a valid module name", decoratedName)
-		return
-	}
-
-	if sym, err = p.Lookup("ImportFuncs"); err != nil {
-		return
-	}
-
-	if importFunc, ok = sym.(func(ExprContext)); !ok {
-		err = fmt.Errorf("plugin %q does not provide a valid import function", decoratedName)
-		return
-	}
-
-	registerPlugin(moduleName, p)
-	importFunc(globalCtx)
-
-	return
-}
-
 func evalPlugin(ctx ExprContext, self *term) (v any, err error) {
 	var childValue any
 	var moduleSpec any
@@ -77,7 +33,7 @@ func evalPlugin(ctx ExprContext, self *term) (v any, err error) {
 	it := NewAnyIterator(childValue)
 	for moduleSpec, err = it.Next(); err == nil; moduleSpec, err = it.Next() {
 		if module, ok := moduleSpec.(string); ok {
-			if err = importPlugin(ctx, dirList, module); err != nil {
+			if err = importPlugin(dirList, module); err != nil {
 				break
 			}
 			count++