Function installCjsModuleLexerContext

server/cjs_module_lexer.go:186–246

(ctx context.Context)

}

func installCjsModuleLexerContext(ctx context.Context) (err error) {
	installDir := path.Join(config.WorkDir, "bin")
	installPath := path.Join(installDir, fmt.Sprintf("cjs-module-lexer-%s", cjsModuleLexerVersion))

	// use dev version of cjs-module-lexer if exists
	// clone https://github.com/esm-dev/cjs-module-lexer to the same directory of esm.sh and run `cargo build --release -p native`
	if DEBUG {
		localBuild := "../cjs-module-lexer/target/release/native"
		if existsFile(localBuild) {
			ensureDir(installDir)
			_, err = utils.CopyFile(localBuild, installPath)
			if err == nil {
				cjsModuleLexerVersion = "dev"
			}
			return
		}
	}

	if existsFile(installPath) {
		return
	}

	url, err := getCjsModuleLexerDownloadURL()
	if err != nil {
		return
	}

	if DEBUG {
		fmt.Println(term.Dim(fmt.Sprintf("Downloading %s...", path.Base(url))))
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
	if err != nil {
		return err
	}
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		return fmt.Errorf("failed to download cjs-module-lexer: %s", res.Status)
	}

	gr, err := gzip.NewReader(&contextReader{ctx: ctx, reader: res.Body})
	if err != nil {
		return fmt.Errorf("failed to decompress cjs-module-lexer: %v", err)
	}
	defer gr.Close()

	ensureDir(installDir)
	f, err := os.OpenFile(installPath, os.O_CREATE|os.O_WRONLY, 0755)
	if err != nil {
		return fmt.Errorf("failed to create cjs-module-lexer: %v", err)
	}
	defer f.Close()