cmd/frontend: move typescript compile watching into main

To remove the dependency from cmd/pkgsite on to
github.com/evanw/esbuild, this change moves the code that starts the
watcher for recompiling typescript files into cmd/frontend. This means
the dev mode functionality in cmd/pkgsite for watching and recompiling
typescript files is gone.

For golang/go#61399

Change-Id: If1325461de30dfd2f71b63d810cab8e9b4cdeb06
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/522735
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
kokoro-CI: kokoro <noreply+kokoro@google.com>

5 files changed, 17 insertions, 23 deletions

diff --git a/cmd/frontend/main.go b/cmd/frontend/main.go
index 2a05e14c..13324a3c 100644
--- a/cmd/frontend/main.go
+++ b/cmd/frontend/main.go
@@ -32,6 +32,7 @@ import (
 	"golang.org/x/pkgsite/internal/queue"
 	"golang.org/x/pkgsite/internal/queue/gcpqueue"
 	"golang.org/x/pkgsite/internal/source"
+	"golang.org/x/pkgsite/internal/static"
 	"golang.org/x/pkgsite/internal/vuln"
 )
 
@@ -115,6 +116,22 @@ func main() {
 		log.Fatalf(ctx, "vuln.NewClient: %v", err)
 	}
 	staticSource := template.TrustedSourceFromFlag(flag.Lookup("static").Value)
+	if *devMode {
+		// In dev mode compile TypeScript files into minified JavaScript files
+		// and rebuild them on file changes.
+		if *staticFlag == "" {
+			panic("staticPath is empty in dev mode; cannot rebuild static files")
+		}
+		ctx := context.Background()
+		if err := static.Build(static.Config{
+			EntryPoint: *staticFlag + "/frontend",
+			Watch:      true,
+			Bundle:     true,
+		}); err != nil {
+			log.Error(ctx, err)
+		}
+	}
+
 	// TODO: Can we use a separate queue for the fetchServer and for the Server?
 	// It would help differentiate ownership.
 	fetchServer := &fetchserver.FetchServer{
@@ -128,7 +145,6 @@ func main() {
 		Queue:            fetchQueue,
 		TemplateFS:       template.TrustedFSFromTrustedSource(staticSource),
 		StaticFS:         os.DirFS(*staticFlag),
-		StaticPath:       *staticFlag,
 		ThirdPartyFS:     os.DirFS(*thirdPartyPath),
 		DevMode:          *devMode,
 		LocalMode:        *localMode,
diff --git a/cmd/pkgsite/main.go b/cmd/pkgsite/main.go
index 9bf74930..9f5eaefd 100644
--- a/cmd/pkgsite/main.go
+++ b/cmd/pkgsite/main.go
@@ -427,7 +427,6 @@ func newServer(getters []fetch.ModuleGetter, localModules []frontend.LocalModule
 		DevMode:          *devMode,
 		LocalMode:        true,
 		LocalModules:     localModules,
-		StaticPath:       *staticFlag,
 		ThirdPartyFS:     thirdparty.FS,
 	})
 	if err != nil {
diff --git a/internal/frontend/fetchserver/fetch_test.go b/internal/frontend/fetchserver/fetch_test.go
index a4eb381c..c98585df 100644
--- a/internal/frontend/fetchserver/fetch_test.go
+++ b/internal/frontend/fetchserver/fetch_test.go
@@ -70,7 +70,6 @@ func newTestServerWithFetch(t *testing.T, proxyModules []*proxytest.Module, cach
 		// Integration tests will use the actual directories.
 		StaticFS:     static.FS,
 		ThirdPartyFS: thirdparty.FS,
-		StaticPath:   "../../static",
 	})
 	if err != nil {
 		t.Fatal(err)
diff --git a/internal/frontend/frontend_test.go b/internal/frontend/frontend_test.go
index c43257b3..2fe64269 100644
--- a/internal/frontend/frontend_test.go
+++ b/internal/frontend/frontend_test.go
@@ -48,7 +48,6 @@ func newTestServer(t *testing.T, cacher Cacher) (*Server, http.Handler) {
 		// Integration tests will use the actual directories.
 		StaticFS:     static.FS,
 		ThirdPartyFS: thirdparty.FS,
-		StaticPath:   "../../static",
 	})
 	if err != nil {
 		t.Fatal(err)
diff --git a/internal/frontend/server.go b/internal/frontend/server.go
index 264669b8..c0df2168 100644
--- a/internal/frontend/server.go
+++ b/internal/frontend/server.go
@@ -35,7 +35,6 @@ import (
 	"golang.org/x/pkgsite/internal/memory"
 	"golang.org/x/pkgsite/internal/middleware/stats"
 	"golang.org/x/pkgsite/internal/queue"
-	"golang.org/x/pkgsite/internal/static"
 	"golang.org/x/pkgsite/internal/version"
 	"golang.org/x/pkgsite/internal/vuln"
 	"golang.org/x/text/cases"
@@ -54,7 +53,6 @@ type Server struct {
 	devMode            bool
 	localMode          bool          // running locally (i.e. ./cmd/pkgsite)
 	localModules       []LocalModule // locally hosted modules; empty in production
-	staticPath         string        // used only for dynamic loading in dev mode
 	errorPage          []byte
 	appVersionLabel    string
 	googleTagManagerID string
@@ -95,7 +93,6 @@ type ServerConfig struct {
 	DevMode          bool
 	LocalMode        bool
 	LocalModules     []LocalModule
-	StaticPath       string // used only for dynamic loading in dev mode
 	Reporter         derrors.Reporter
 	VulndbClient     *vuln.Client
 }
@@ -118,7 +115,6 @@ func NewServer(scfg ServerConfig) (_ *Server, err error) {
 		devMode:       scfg.DevMode,
 		localMode:     scfg.LocalMode,
 		localModules:  scfg.LocalModules,
-		staticPath:    scfg.StaticPath,
 		templates:     ts,
 		reporter:      scfg.Reporter,
 		fileMux:       http.NewServeMux(),
@@ -738,21 +734,6 @@ func parsePageTemplates(fsys template.TrustedFS) (map[string]*template.Template,
 }
 
 func (s *Server) staticHandler() http.Handler {
-	// In dev mode compile TypeScript files into minified JavaScript files
-	// and rebuild them on file changes.
-	if s.devMode {
-		if s.staticPath == "" {
-			panic("staticPath is empty in dev mode; cannot rebuild static files")
-		}
-		ctx := context.Background()
-		if err := static.Build(static.Config{
-			EntryPoint: s.staticPath + "/frontend",
-			Watch:      true,
-			Bundle:     true,
-		}); err != nil {
-			log.Error(ctx, err)
-		}
-	}
 	return http.StripPrefix("/static/", http.FileServer(http.FS(s.staticFS)))
 }