feat: add js semver runtimes

Author: paulrosca-snyk

internal/semver/jscompat/jscompat.go

@@ -0,0 +1,62 @@
+package jscompat
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/dop251/goja"
+)
+
+func LoadModule(vm *goja.Runtime, script string) (map[string]any, error) {
+	prg, err := goja.Compile("index.js", script, true)
+	if err != nil {
+		return nil, err
+	}
+
+	// For some reason we need to define module. Do not remove this code!
+	if _, err := vm.RunString("module = {};"); err != nil {
+		return nil, err
+	}
+
+	moduleValue, err := vm.RunProgram(prg)
+	if err != nil {
+		return nil, err
+	}
+
+	object, ok := moduleValue.Export().(map[string]any)
+	if !ok {
+		return nil, errors.New("module does not return object")
+	}
+
+	return object, nil
+}
+
+func GetFunction(mod map[string]any, name string) (func(goja.FunctionCall) goja.Value, error) {
+	fnValue, ok := mod[name]
+	if !ok {
+		return nil, fmt.Errorf("function %s is not found in JS module", name)
+	}
+
+	fnObj, ok := fnValue.(func(goja.FunctionCall) goja.Value)
+	if !ok {
+		return nil, fmt.Errorf("property %s is not a function", name)
+	}
+
+	return fnObj, nil
+}
+
+func Panicked(cb func()) any {
+	var panicked any
+
+	func() {
+		defer func() {
+			if err := recover(); err != nil {
+				panicked = err
+			}
+		}()
+
+		cb()
+	}()
+
+	return panicked
+}

internal/semver/maven/js/.gitignore

@@ -0,0 +1,2 @@
+/build
+/node_modules

internal/semver/maven/js/index.js

@@ -0,0 +1,3 @@
+import * as semver from "@snyk/maven-semver";
+
+module.exports = semver;