fix: patch support for dir named workspace

cmd/gazelle/fix-update.go

@@ -18,6 +18,7 @@ package main
 import (
  "bytes"
  "context"
+ "errors"
  "flag"
  "fmt"
  "io/ioutil"
@@ -26,6 +27,7 @@ import (
  "path/filepath"
  "sort"
  "strings"
+ "syscall"
 
  "github.com/bazelbuild/bazel-gazelle/config"
  gzflag "github.com/bazelbuild/bazel-gazelle/flag"
@@ -142,7 +144,7 @@ func (ucr *updateConfigurer) CheckFlags(fs *flag.FlagSet, c *config.Config) erro
  ucr.repoConfigPath = wspace.FindWORKSPACEFile(c.RepoRoot)
  }
  repoConfigFile, err := rule.LoadWorkspaceFile(ucr.repoConfigPath, "")
- if err != nil && !os.IsNotExist(err) {
+ if err != nil && !os.IsNotExist(err) && !isDirErr(err) {
  return err
  } else if err == nil {
  c.Repos, _, err = repo.ListRepositories(repoConfigFile)
@@ -741,3 +743,14 @@ func appendOrMergeKindMapping(mappedLoads []rule.LoadInfo, mappedKind config.Map
  Symbols: []string{mappedKind.KindName},
  })
 }
+
+func isDirErr(err error) bool {
+ if err == nil {
+ return false
+ }
+ var pe *os.PathError
+ if errors.As(err, &pe) {
+ return pe.Err == syscall.EISDIR
+ }
+ return false
+}