Add a new OSFixture

osfixture.go

@@ -0,0 +1,86 @@
+package fixtures
+
+import (
+	"io"
+	"slices"
+
+	"github.com/go-git/go-billy/v6"
+	"github.com/go-git/go-billy/v6/osfs"
+)
+
+type OSFixture struct {
+	dir string
+	*Fixture
+}
+
+// NewOSFixture converts a Fixture which is based on embedfs, into
+// an OS based fixture.
+func NewOSFixture(f *Fixture, dir string) *OSFixture {
+	return &OSFixture{
+		dir:     dir,
+		Fixture: f,
+	}
+}
+
+func (f *OSFixture) Is(tag string) bool {
+	return f.Fixture.Is(tag)
+}
+
+func (f *OSFixture) Packfile() billy.File {
+	return embedToOsfs(f.dir, f.Fixture.Packfile())
+}
+
+func (f *OSFixture) Idx() billy.File {
+	return embedToOsfs(f.dir, f.Fixture.Idx())
+}
+
+func (f *OSFixture) Rev() billy.File {
+	return embedToOsfs(f.dir, f.Fixture.Rev())
+}
+
+func (f *OSFixture) DotGit(opts ...Option) billy.Filesystem {
+	return f.Fixture.DotGit(opts...)
+}
+
+func (f *OSFixture) Clone() *OSFixture {
+	nf := &OSFixture{
+		Fixture: &Fixture{
+			URL:          f.URL,
+			DotGitHash:   f.DotGitHash,
+			Head:         f.Head,
+			PackfileHash: f.PackfileHash,
+			WorktreeHash: f.WorktreeHash,
+			ObjectsCount: f.ObjectsCount,
+			Tags:         slices.Clone(f.Tags),
+		},
+		dir: f.dir,
+	}
+
+	return nf
+}
+
+func (f *OSFixture) Worktree(opts ...Option) billy.Filesystem {
+	return f.Fixture.Worktree(opts...)
+}
+
+func embedToOsfs(dir string, f billy.File) billy.File {
+	defer f.Close()
+
+	fs := osfs.New(dir)
+	out, err := fs.TempFile("", "embed")
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = io.Copy(out, f)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = out.Seek(0, io.SeekStart)
+	if err != nil {
+		panic(err)
+	}
+
+	return out
+}