git: add Static option to PlainOpen

Also adds Static configuration to Storage and DotGit. This option means
that the git repository is not expected to be modified while open and
enables some optimizations.

Each time a file is accessed the storer tries to open an object file for
the requested hash. When this is done for a lot of objects it is
expensive. With Static option a list of object files is generated the
first time an object is accessed and used to check if exists instead of
using system calls.

A similar optimization is done for packfiles.

Signed-off-by: Javi Fontan <jfontan@gmail.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/repository.go b/repository.go
index 818cfb3..d99d6eb 100644
--- a/repository.go
+++ b/repository.go
@@ -235,9 +235,8 @@ func PlainOpen(path string) (*Repository, error) {
 	return PlainOpenWithOptions(path, &PlainOpenOptions{})
 }
 
-// PlainOpen opens a git repository from the given path. It detects if the
-// repository is bare or a normal one. If the path doesn't contain a valid
-// repository ErrRepositoryNotExists is returned
+// PlainOpenWithOptions opens a git repository from the given path with specific
+// options. See PlainOpen for more info.
 func PlainOpenWithOptions(path string, o *PlainOpenOptions) (*Repository, error) {
 	dot, wt, err := dotGitToOSFilesystems(path, o.DetectDotGit)
 	if err != nil {
@@ -252,7 +251,11 @@ func PlainOpenWithOptions(path string, o *PlainOpenOptions) (*Repository, error)
 		return nil, err
 	}
 
-	s, err := filesystem.NewStorage(dot)
+	so := filesystem.StorageOptions{
+		Static: o.Static,
+	}
+
+	s, err := filesystem.NewStorageWithOptions(dot, so)
 	if err != nil {
 		return nil, err
 	}