feat: introduce remote loader for missing files/

internal/esbuild/esbuild.go

@@ -68,7 +68,7 @@ func getEsbuildOptions(ctx context.Context, options AssetCompileOptions) (*api.B
 		Bundle:            true,
 		Write:             false,
 		LogLevel:          api.LogLevelWarning,
-		Plugins:           []api.Plugin{newScssPlugin(ctx)},
+		Plugins:           []api.Plugin{newScssPlugin(ctx), newRemoteLoaderPlugin()},
 		Loader: map[string]api.Loader{
 			".html": api.LoaderText,
 			".twig": api.LoaderText,

internal/esbuild/remote_loader_plugin.go

@@ -0,0 +1,86 @@
+package esbuild
+
+import (
+	"fmt"
+	"github.com/evanw/esbuild/pkg/api"
+	"io"
+	"net/http"
+	"strings"
+)
+
+const RemoteLoaderName = "sw-remote-loader"
+
+func newRemoteLoaderPlugin() api.Plugin {
+	return api.Plugin{
+		Name: RemoteLoaderName,
+		Setup: func(build api.PluginBuild) {
+			// Route all @administration imports to our namespace
+			build.OnResolve(api.OnResolveOptions{Filter: `^@administration\/`}, func(args api.OnResolveArgs) (api.OnResolveResult, error) {
+				return api.OnResolveResult{
+					Path:      args.Path,
+					Namespace: RemoteLoaderName,
+				}, nil
+			})
+
+			// All relative imports inside our namespace, should be still our namespace
+			build.OnResolve(api.OnResolveOptions{Filter: "/.*/", Namespace: RemoteLoaderName}, func(args api.OnResolveArgs) (api.OnResolveResult, error) {
+				return api.OnResolveResult{
+					Path:      args.Path,
+					Namespace: RemoteLoaderName,
+				}, nil
+			})
+
+			// When our namespace is used, we load the remote file
+			build.OnLoad(api.OnLoadOptions{Filter: "/.*/", Namespace: RemoteLoaderName}, func(args api.OnLoadArgs) (api.OnLoadResult, error) {
+				// Try to load the file with .ts and .js extension
+				if content, err := fetchRemoteAsset(args.Path + ".ts"); err == nil {
+					return api.OnLoadResult{
+						Contents: &content,
+						Loader:   api.LoaderTS,
+					}, nil
+				}
+
+				if content, err := fetchRemoteAsset(args.Path + ".js"); err == nil {
+					return api.OnLoadResult{
+						Contents: &content,
+						Loader:   api.LoaderTS,
+					}, nil
+				}
+
+				return api.OnLoadResult{}, fmt.Errorf("file does not exists")
+			})
+		},
+	}
+}
+
+func fetchRemoteAsset(file string) (string, error) {
+	path := strings.ReplaceAll(file, "@administration/", "administration/src/")
+
+	r, err := http.NewRequest("GET", "https://raw.githubusercontent.com/shopware/shopware/trunk/src/Administration/Resources/app/"+path, nil)
+	if err != nil {
+		return "", err
+	}
+
+	r.Header.Add("User-Agent", "Shopware CLI")
+
+	resp, err := http.DefaultClient.Do(r)
+	if err != nil {
+		return "", err
+	}
+
+	if resp.StatusCode != 200 {
+		return "", fmt.Errorf("file does not exists")
+	}
+
+	content, err := io.ReadAll(resp.Body)
+
+	if err != nil {
+		return "", err
+	}
+
+	if err := resp.Body.Close(); err != nil {
+		return "", err
+	}
+
+	return string(content), nil
+}