Provide API to create a custom esbuild CLI with plugins (#3539)

pkg/cli/cli.go

@@ -28,7 +28,14 @@ import (
 // "esbuild" executable such as the lack of auxiliary flags (e.g. "--help" and
 // "--version") but it is otherwise exactly the same code.
 func Run(osArgs []string) int {
-	return runImpl(osArgs)
+	return runImpl(osArgs, []api.Plugin{})
+}
+
+// This function invokes the esbuild CLI. It takes an array of command-line
+// arguments (excluding the executable argument itself) and returns an exit
+// code. It also takes adds some plugins that need to be added to the run
+func RunWithPlugins(osArgs []string, plugin []api.Plugin) int {
+	return runImpl(osArgs, plugin)
 }
 
 // This parses an array of strings into an options object suitable for passing

pkg/cli/cli_impl.go

@@ -1129,7 +1129,7 @@ func addAnalyzePlugin(buildOptions *api.BuildOptions, analyze analyzeMode, osArg
 	buildOptions.Metafile = true
 }
 
-func runImpl(osArgs []string) int {
+func runImpl(osArgs []string, plugins []api.Plugin) int {
 	// Special-case running a server
 	for _, arg := range osArgs {
 		if arg == "--serve" ||
@@ -1280,6 +1280,7 @@ func runImpl(osArgs []string) int {
 			}
 		}
 
+		buildOptions.Plugins = plugins
 		// Handle post-build actions with a plugin so they also work in watch mode
 		buildOptions.Plugins = append(buildOptions.Plugins, api.Plugin{
 			Name: "PostBuildActions",