Revert "WIP: attempt to use fsnotify reliably"

This reverts commit f0bce94.

I am going to use a simple polling approach.

cmd/languageserver.go

@@ -44,7 +44,6 @@ func init() {
 			go ls.StartHoverWorker(ctx)
 			go ls.StartCommandWorker(ctx)
 			go ls.StartConfigWorker(ctx)
-			go ls.StartWorkspaceStateWorker(ctx)
 
 			sigChan := make(chan os.Signal, 1)
 			signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)

internal/lsp/server.go

@@ -34,7 +34,6 @@ import (
 	"github.com/styrainc/regal/internal/lsp/opa/oracle"
 	"github.com/styrainc/regal/internal/lsp/types"
 	"github.com/styrainc/regal/internal/lsp/uri"
-	"github.com/styrainc/regal/internal/lsp/workspace"
 	rparse "github.com/styrainc/regal/internal/parse"
 	"github.com/styrainc/regal/internal/update"
 	"github.com/styrainc/regal/internal/util"
@@ -84,8 +83,6 @@ type LanguageServer struct {
 	loadedConfig     *config.Config
 	loadedConfigLock sync.Mutex
 
-	workspaceDirWatcher *workspace.DirWatcher
-
 	workspaceRootURI string
 	clientIdentifier clients.Identifier
 
@@ -400,49 +397,6 @@ func (l *LanguageServer) StartConfigWorker(ctx context.Context) {
 	}
 }
 
-func (l *LanguageServer) StartWorkspaceStateWorker(ctx context.Context) {
-	ready := make(chan struct{})
-	go func() {
-		for l.workspaceRootURI == "" {
-			time.Sleep(300 * time.Millisecond)
-		}
-		ready <- struct{}{}
-	}()
-	select {
-	case <-ctx.Done():
-		return
-	case <-ready:
-	}
-
-	l.logError(fmt.Errorf("starting workspace state worker"))
-
-	dw, err := workspace.NewDirWatcher(&workspace.DirWatcherOpts{
-		ErrorLog:        l.errorLog,
-		PollingInterval: 500 * time.Millisecond,
-		RootPath:        uri.ToPath(l.clientIdentifier, l.workspaceRootURI),
-	})
-	if err != nil {
-		l.logError(fmt.Errorf("failed to create dir watcher: %w", err))
-	}
-
-	l.workspaceDirWatcher = dw
-
-	l.workspaceDirWatcher.Start(ctx)
-
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case path := <-dw.CreateChan:
-			l.logError(fmt.Errorf("file created: %s", path))
-		case path := <-dw.UpdateChan:
-			l.logError(fmt.Errorf("file updated: %s", path))
-		case path := <-dw.RemoveChan:
-			l.logError(fmt.Errorf("file removed: %s", path))
-		}
-	}
-}
-
 func (l *LanguageServer) StartCommandWorker(ctx context.Context) {
 	// note, in this function conn.Call is used as the workspace/applyEdit message is a request, not a notification
 	// as per the spec. In order to be 'routed' to the correct handler on the client it must have an ID