Fingerprint each spa file to break cache (#320).

cmd/build.go

@@ -160,19 +160,19 @@ func Build() error {
 	}
 
 	// Run Gopack (custom Snowpack alternative) on app for ESM support.
-	err = build.Gopack(buildPath, spaPath, spaPath+"core/main.js")
+	err = build.Gopack(buildPath, spaPath, spaPath+"core/main.js", siteConfig.Fingerprint)
 	if err != nil {
 		log.Fatal("\nError in Gopack main.js build step", err)
 	}
 
 	// Run Gopack (custom Snowpack alternative) on dynamically imported adminMenu.
-	err = build.Gopack(buildPath, spaPath, spaPath+"core/cms/admin_menu.js")
+	err = build.Gopack(buildPath, spaPath, spaPath+"core/cms/admin_menu.js", siteConfig.Fingerprint)
 	if err != nil {
 		log.Fatal("\nError in Gopack admin_menu.svelte build step", err)
 	}
 
 	// Run Gopack manually on dynamic imports
-	err = build.GopackDynamic(buildPath, spaPath)
+	err = build.GopackDynamic(buildPath, spaPath, siteConfig.Fingerprint)
 	if err != nil {
 		log.Fatal("\nError in GopackDynamic build step", err)
 	}

cmd/build/gopack.go

@@ -44,7 +44,7 @@ var (
 var alreadyConvertedFiles []string
 
 // Gopack ensures ESM support for NPM dependencies.
-func Gopack(buildPath, spaPath, entrypoint string) error {
+func Gopack(buildPath, spaPath, entrypoint, fingerprint string) error {
 
 	defer Benchmark(time.Now(), "Running Gopack")
 
@@ -54,18 +54,20 @@ func Gopack(buildPath, spaPath, entrypoint string) error {
 	alreadyConvertedFiles = []string{}
 
 	// Start at the entry point for the app
-	err := runPack(buildPath, spaPath, entrypoint)
+	err := runPack(buildPath, spaPath, entrypoint, fingerprint)
 	if err != nil {
 		return err
 	}
 
 	return nil
 }
 
-func runPack(buildPath, spaPath, convertPath string) error {
+func runPack(buildPath, spaPath, convertPath, fingerprint string) error {
 	// Destination path for dependencies
 	gopackDir := spaPath + "web_modules"
 
+	// Remove query string to read file
+	convertPath = strings.Split(convertPath, "?")[0]
 	// Get the actual contents of the file we want to convert
 	contentBytes, err := ioutil.ReadFile(convertPath)
 	if err != nil {
@@ -97,6 +99,8 @@ func runPack(buildPath, spaPath, convertPath string) error {
 		pathStr := string(pathBytes)
 		// Remove single or double quotes around path.
 		pathStr = strings.Trim(pathStr, `'"`)
+		// Remove query string so path can be found
+		pathStr = strings.Split(pathStr, "?")[0]
 		// Intitialize the string that determines if we found the import path.
 		var foundPath string
 		// Initialize the full path of the import.
@@ -189,7 +193,7 @@ func runPack(buildPath, spaPath, convertPath string) error {
 			// Add the current file to list of already converted files.
 			alreadyConvertedFiles = append(alreadyConvertedFiles, fullPathStr)
 			// Use fullPathStr recursively to find its imports.
-			err = runPack(buildPath, spaPath, fullPathStr)
+			err = runPack(buildPath, spaPath, fullPathStr, fingerprint)
 			if err != nil {
 				return fmt.Errorf("\nCan't runPack on %s %w", fullPathStr, err)
 			}
@@ -198,8 +202,8 @@ func runPack(buildPath, spaPath, convertPath string) error {
 		if foundPath != "" {
 			// Remove "public" build dir from path.
 			replacePath := strings.Replace(foundPath, buildPath, "", 1)
-			// Wrap path in quotes.
-			replacePath = "'" + replacePath + "'"
+			// Wrap path in quotes and add query params to break cache.
+			replacePath = "'" + replacePath + "?" + fingerprint + "'"
 			// Convert string path to bytes.
 			replacePathBytes := []byte(replacePath)
 			// Actually replace the path to the dependency in the source content.

cmd/build/gopack_dynamic.go

@@ -8,7 +8,7 @@ import (
 )
 
 // Create ESM support for files that don't have static imports in the app
-func GopackDynamic(buildPath string, spaPath string) error {
+func GopackDynamic(buildPath, spaPath, fingerprint string) error {
 
 	defer Benchmark(time.Now(), "Running GopackDynamic")
 
@@ -27,7 +27,7 @@ func GopackDynamic(buildPath string, spaPath string) error {
 			if info.IsDir() {
 				return nil
 			}
-			err = Gopack(buildPath, spaPath, spaPath+fieldWidgetPath+"/"+path)
+			err = Gopack(buildPath, spaPath, spaPath+fieldWidgetPath+"/"+path, fingerprint)
 			if err != nil {
 				return fmt.Errorf("\nError running Gopack for custom FieldWidget: %w", err)
 			}