github--github-mcp-server/pkg/github/ui_embed.go

package github

import (
	"embed"
)

// UIAssets embeds the built MCP App UI HTML files.
// These files are generated by running `script/build-ui` which compiles
// the React/Primer components in the ui/ directory.
//
//go:embed ui_dist/*.html
var UIAssets embed.FS

// GetUIAsset reads a UI asset from the embedded filesystem.
// The name should be just the filename (e.g., "get-me.html").
func GetUIAsset(name string) (string, error) {
	data, err := UIAssets.ReadFile("ui_dist/" + name)
	if err != nil {
		return "", err
	}
	return string(data), nil
}

// MustGetUIAsset reads a UI asset and panics if it fails.
// Use this when the asset is required for server operation.
func MustGetUIAsset(name string) string {
	html, err := GetUIAsset(name)
	if err != nil {
		panic("failed to load UI asset " + name + ": " + err.Error())
	}
	return html
}

// UIAssetsAvailable returns true if the MCP App UI assets have been built.
// This checks for a known UI asset file to determine if `script/build-ui` has been run.
// Use this to gracefully skip UI registration when assets aren't available,
// allowing Insiders mode to work for non-UI features without requiring a UI build.
func UIAssetsAvailable() bool {
	_, err := GetUIAsset("get-me.html")
	return err == nil
}