mirror of
https://github.com/tailscale/tailscale.git
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98a5116434
I'm not saying it works, but it compiles. Updates #5794 Change-Id: I2f3c99732e67fe57a05edb25b758d083417f083e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
331 lines
9.0 KiB
Go
331 lines
9.0 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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package main
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import (
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"fmt"
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"log"
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"net"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"runtime"
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"slices"
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"strconv"
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"time"
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esbuild "github.com/evanw/esbuild/pkg/api"
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)
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const (
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devMode = true
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prodMode = false
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)
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// commonSetup performs setup that is common to both dev and build modes.
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func commonSetup(dev bool) (*esbuild.BuildOptions, error) {
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// Change cwd to to where this file lives -- that's where all inputs for
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// esbuild and other build steps live.
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root, err := findRepoRoot()
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if err != nil {
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return nil, err
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}
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if *yarnPath == "" {
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*yarnPath = path.Join(root, "tool", "yarn")
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}
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tsConnectDir := filepath.Join(root, "cmd", "tsconnect")
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if err := os.Chdir(tsConnectDir); err != nil {
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return nil, fmt.Errorf("Cannot change cwd: %w", err)
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}
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if err := installJSDeps(); err != nil {
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return nil, fmt.Errorf("Cannot install JS deps: %w", err)
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}
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return &esbuild.BuildOptions{
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EntryPoints: []string{"src/app/index.ts", "src/app/index.css"},
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Outdir: *distDir,
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Bundle: true,
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Sourcemap: esbuild.SourceMapLinked,
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LogLevel: esbuild.LogLevelInfo,
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Define: map[string]string{"DEBUG": strconv.FormatBool(dev)},
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Target: esbuild.ES2017,
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Plugins: []esbuild.Plugin{
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{
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Name: "tailscale-tailwind",
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Setup: func(build esbuild.PluginBuild) {
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setupEsbuildTailwind(build, dev)
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},
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},
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{
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Name: "tailscale-go-wasm-exec-js",
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Setup: setupEsbuildWasmExecJS,
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},
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{
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Name: "tailscale-wasm",
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Setup: func(build esbuild.PluginBuild) {
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setupEsbuildWasm(build, dev)
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},
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},
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},
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JSXMode: esbuild.JSXModeAutomatic,
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}, nil
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}
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func findRepoRoot() (string, error) {
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if *rootDir != "" {
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return *rootDir, nil
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}
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cwd, err := os.Getwd()
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if err != nil {
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return "", err
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}
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for {
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if _, err := os.Stat(path.Join(cwd, "go.mod")); err == nil {
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return cwd, nil
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}
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if cwd == "/" {
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return "", fmt.Errorf("Cannot find repo root")
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}
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cwd = path.Dir(cwd)
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}
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}
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func commonPkgSetup(dev bool) (*esbuild.BuildOptions, error) {
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buildOptions, err := commonSetup(dev)
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if err != nil {
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return nil, err
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}
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buildOptions.EntryPoints = []string{"src/pkg/pkg.ts", "src/pkg/pkg.css"}
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buildOptions.Outdir = *pkgDir
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buildOptions.Format = esbuild.FormatESModule
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buildOptions.AssetNames = "[name]"
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return buildOptions, nil
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}
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// cleanDir removes files from dirPath, except the ones specified by
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// preserveFiles.
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func cleanDir(dirPath string, preserveFiles ...string) error {
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log.Printf("Cleaning %s...\n", dirPath)
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files, err := os.ReadDir(dirPath)
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if err != nil {
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if os.IsNotExist(err) {
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return os.MkdirAll(dirPath, 0755)
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}
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return err
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}
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for _, file := range files {
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if !slices.Contains(preserveFiles, file.Name()) {
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if err := os.Remove(filepath.Join(dirPath, file.Name())); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func runEsbuildServe(buildOptions esbuild.BuildOptions) {
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host, portStr, err := net.SplitHostPort(*addr)
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if err != nil {
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log.Fatalf("Cannot parse addr: %v", err)
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}
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port, err := strconv.ParseUint(portStr, 10, 16)
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if err != nil {
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log.Fatalf("Cannot parse port: %v", err)
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}
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result, err := esbuild.Serve(esbuild.ServeOptions{
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Port: uint16(port),
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Host: host,
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Servedir: "./",
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}, buildOptions)
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if err != nil {
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log.Fatalf("Cannot start esbuild server: %v", err)
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}
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log.Printf("Listening on http://%s:%d\n", result.Host, result.Port)
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result.Wait()
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}
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func runEsbuild(buildOptions esbuild.BuildOptions) esbuild.BuildResult {
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log.Printf("Running esbuild...\n")
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result := esbuild.Build(buildOptions)
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if len(result.Errors) > 0 {
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log.Printf("ESBuild Error:\n")
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for _, e := range result.Errors {
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log.Printf("%v", e)
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}
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log.Fatal("Build failed")
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}
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if len(result.Warnings) > 0 {
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log.Printf("ESBuild Warnings:\n")
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for _, w := range result.Warnings {
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log.Printf("%v", w)
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}
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}
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return result
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}
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// setupEsbuildWasmExecJS generates an esbuild plugin that serves the current
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// wasm_exec.js runtime helper library from the Go toolchain.
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func setupEsbuildWasmExecJS(build esbuild.PluginBuild) {
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wasmExecSrcPath := filepath.Join(runtime.GOROOT(), "misc", "wasm", "wasm_exec.js")
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build.OnResolve(esbuild.OnResolveOptions{
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Filter: "./wasm_exec$",
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}, func(args esbuild.OnResolveArgs) (esbuild.OnResolveResult, error) {
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return esbuild.OnResolveResult{Path: wasmExecSrcPath}, nil
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})
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}
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// setupEsbuildWasm generates an esbuild plugin that builds the Tailscale wasm
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// binary and serves it as a file that the JS can load.
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func setupEsbuildWasm(build esbuild.PluginBuild, dev bool) {
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// Add a resolve hook to convince esbuild that the path exists.
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build.OnResolve(esbuild.OnResolveOptions{
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Filter: "./main.wasm$",
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}, func(args esbuild.OnResolveArgs) (esbuild.OnResolveResult, error) {
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return esbuild.OnResolveResult{
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Path: "./src/main.wasm",
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Namespace: "generated",
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}, nil
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})
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build.OnLoad(esbuild.OnLoadOptions{
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Filter: "./src/main.wasm$",
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}, func(args esbuild.OnLoadArgs) (esbuild.OnLoadResult, error) {
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contents, err := buildWasm(dev)
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if err != nil {
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return esbuild.OnLoadResult{}, fmt.Errorf("Cannot build main.wasm: %w", err)
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}
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contentsStr := string(contents)
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return esbuild.OnLoadResult{
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Contents: &contentsStr,
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Loader: esbuild.LoaderFile,
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}, nil
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})
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}
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func buildWasm(dev bool) ([]byte, error) {
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start := time.Now()
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outputFile, err := os.CreateTemp("", "main.*.wasm")
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if err != nil {
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return nil, fmt.Errorf("Cannot create main.wasm output file: %w", err)
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}
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outputPath := outputFile.Name()
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defer os.Remove(outputPath)
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// Running defer (*os.File).Close() in defer order before os.Remove
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// because on some systems like Windows, it is possible for os.Remove
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// to fail for unclosed files.
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defer outputFile.Close()
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args := []string{"build", "-tags", "tailscale_go,osusergo,netgo,nethttpomithttp2,omitidna,omitpemdecrypt"}
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if !dev {
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if *devControl != "" {
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return nil, fmt.Errorf("Development control URL can only be used in dev mode.")
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}
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// Omit long paths and debug symbols in release builds, to reduce the
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// generated WASM binary size.
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args = append(args, "-trimpath", "-ldflags", "-s -w")
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} else if *devControl != "" {
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args = append(args, "-ldflags", fmt.Sprintf("-X 'main.ControlURL=%v'", *devControl))
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}
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args = append(args, "-o", outputPath, "./wasm")
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cmd := exec.Command(filepath.Join(runtime.GOROOT(), "bin", "go"), args...)
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cmd.Env = append(os.Environ(), "GOOS=js", "GOARCH=wasm")
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err = cmd.Run()
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if err != nil {
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return nil, fmt.Errorf("Cannot build main.wasm: %w", err)
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}
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log.Printf("Built wasm in %v\n", time.Since(start).Round(time.Millisecond))
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if !dev {
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err := runWasmOpt(outputPath)
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if err != nil {
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return nil, fmt.Errorf("Cannot run wasm-opt: %w", err)
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}
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}
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return os.ReadFile(outputPath)
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}
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func runWasmOpt(path string) error {
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start := time.Now()
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stat, err := os.Stat(path)
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if err != nil {
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return fmt.Errorf("Cannot stat %v: %w", path, err)
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}
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startSize := stat.Size()
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cmd := exec.Command("../../tool/wasm-opt", "--enable-bulk-memory", "-Oz", path, "-o", path)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err = cmd.Run()
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if err != nil {
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return fmt.Errorf("Cannot run wasm-opt: %w", err)
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}
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stat, err = os.Stat(path)
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if err != nil {
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return fmt.Errorf("Cannot stat %v: %w", path, err)
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}
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endSize := stat.Size()
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log.Printf("Ran wasm-opt in %v, size dropped by %dK\n", time.Since(start).Round(time.Millisecond), (startSize-endSize)/1024)
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return nil
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}
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// installJSDeps installs the JavaScript dependencies specified by package.json
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func installJSDeps() error {
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log.Printf("Installing JS deps...\n")
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return runYarn()
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}
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func runYarn(args ...string) error {
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cmd := exec.Command(*yarnPath, args...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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return cmd.Run()
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}
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// EsbuildMetadata is the subset of metadata struct (described by
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// https://esbuild.github.io/api/#metafile) that we care about for mapping
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// from entry points to hashed file names.
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type EsbuildMetadata struct {
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Outputs map[string]struct {
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Inputs map[string]struct {
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BytesInOutput int64 `json:"bytesInOutput"`
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} `json:"inputs,omitempty"`
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EntryPoint string `json:"entryPoint,omitempty"`
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} `json:"outputs,omitempty"`
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}
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func setupEsbuildTailwind(build esbuild.PluginBuild, dev bool) {
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build.OnLoad(esbuild.OnLoadOptions{
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Filter: "./src/.*\\.css$",
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}, func(args esbuild.OnLoadArgs) (esbuild.OnLoadResult, error) {
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start := time.Now()
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yarnArgs := []string{"--silent", "tailwind", "-i", args.Path}
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if !dev {
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yarnArgs = append(yarnArgs, "--minify")
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}
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cmd := exec.Command(*yarnPath, yarnArgs...)
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tailwindOutput, err := cmd.Output()
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log.Printf("Ran tailwind in %v\n", time.Since(start).Round(time.Millisecond))
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if err != nil {
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if exitErr, ok := err.(*exec.ExitError); ok {
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log.Printf("Tailwind stderr: %s", exitErr.Stderr)
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}
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return esbuild.OnLoadResult{}, fmt.Errorf("Cannot run tailwind: %w", err)
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}
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tailwindOutputStr := string(tailwindOutput)
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return esbuild.OnLoadResult{
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Contents: &tailwindOutputStr,
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Loader: esbuild.LoaderCSS,
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}, nil
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})
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}
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