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authorMáximo Cuadros <mcuadros@gmail.com>2018-09-04 12:06:44 +0200
committerGitHub <noreply@github.com>2018-09-04 12:06:44 +0200
commit2f1583896bcc3c182d8165d6aeeb23c771cc5417 (patch)
tree883c48f088d16ef07c97fdb93888c5947df994f4 /storage/filesystem/dotgit
parent8e76874ae2a3f5029269af76a86f0ee294699df9 (diff)
parent659ec443b4a975e3adf78f24e59ad69d210d2c0b (diff)
downloadgo-git-2f1583896bcc3c182d8165d6aeeb23c771cc5417.tar.gz
Merge pull request #941 from jfontan/improvement/static-mode
plumbing/storer: add ExclusiveAccess option to Storer
Diffstat (limited to 'storage/filesystem/dotgit')
-rw-r--r--storage/filesystem/dotgit/dotgit.go185
-rw-r--r--storage/filesystem/dotgit/dotgit_test.go24
2 files changed, 205 insertions, 4 deletions
diff --git a/storage/filesystem/dotgit/dotgit.go b/storage/filesystem/dotgit/dotgit.go
index df4f756..00dd2a4 100644
--- a/storage/filesystem/dotgit/dotgit.go
+++ b/storage/filesystem/dotgit/dotgit.go
@@ -57,21 +57,43 @@ var (
ErrSymRefTargetNotFound = errors.New("symbolic reference target not found")
)
+// Options holds configuration for the storage.
+type Options struct {
+ // ExclusiveAccess means that the filesystem is not modified externally
+ // while the repo is open.
+ ExclusiveAccess bool
+}
+
// The DotGit type represents a local git repository on disk. This
// type is not zero-value-safe, use the New function to initialize it.
type DotGit struct {
- fs billy.Filesystem
+ options Options
+ fs billy.Filesystem
// incoming object directory information
incomingChecked bool
incomingDirName string
+
+ objectList []plumbing.Hash
+ objectMap map[plumbing.Hash]struct{}
+ packList []plumbing.Hash
+ packMap map[plumbing.Hash]struct{}
}
// New returns a DotGit value ready to be used. The path argument must
// be the absolute path of a git repository directory (e.g.
// "/foo/bar/.git").
func New(fs billy.Filesystem) *DotGit {
- return &DotGit{fs: fs}
+ return NewWithOptions(fs, Options{})
+}
+
+// NewWithOptions creates a new DotGit and sets non default configuration
+// options. See New for complete help.
+func NewWithOptions(fs billy.Filesystem, o Options) *DotGit {
+ return &DotGit{
+ options: o,
+ fs: fs,
+ }
}
// Initialize creates all the folder scaffolding.
@@ -143,11 +165,25 @@ func (d *DotGit) Shallow() (billy.File, error) {
// NewObjectPack return a writer for a new packfile, it saves the packfile to
// disk and also generates and save the index for the given packfile.
func (d *DotGit) NewObjectPack() (*PackWriter, error) {
+ d.cleanPackList()
return newPackWrite(d.fs)
}
// ObjectPacks returns the list of availables packfiles
func (d *DotGit) ObjectPacks() ([]plumbing.Hash, error) {
+ if !d.options.ExclusiveAccess {
+ return d.objectPacks()
+ }
+
+ err := d.genPackList()
+ if err != nil {
+ return nil, err
+ }
+
+ return d.packList, nil
+}
+
+func (d *DotGit) objectPacks() ([]plumbing.Hash, error) {
packDir := d.fs.Join(objectsPath, packPath)
files, err := d.fs.ReadDir(packDir)
if err != nil {
@@ -181,6 +217,11 @@ func (d *DotGit) objectPackPath(hash plumbing.Hash, extension string) string {
}
func (d *DotGit) objectPackOpen(hash plumbing.Hash, extension string) (billy.File, error) {
+ err := d.hasPack(hash)
+ if err != nil {
+ return nil, err
+ }
+
pack, err := d.fs.Open(d.objectPackPath(hash, extension))
if err != nil {
if os.IsNotExist(err) {
@@ -195,15 +236,27 @@ func (d *DotGit) objectPackOpen(hash plumbing.Hash, extension string) (billy.Fil
// ObjectPack returns a fs.File of the given packfile
func (d *DotGit) ObjectPack(hash plumbing.Hash) (billy.File, error) {
+ err := d.hasPack(hash)
+ if err != nil {
+ return nil, err
+ }
+
return d.objectPackOpen(hash, `pack`)
}
// ObjectPackIdx returns a fs.File of the index file for a given packfile
func (d *DotGit) ObjectPackIdx(hash plumbing.Hash) (billy.File, error) {
+ err := d.hasPack(hash)
+ if err != nil {
+ return nil, err
+ }
+
return d.objectPackOpen(hash, `idx`)
}
func (d *DotGit) DeleteOldObjectPackAndIndex(hash plumbing.Hash, t time.Time) error {
+ d.cleanPackList()
+
path := d.objectPackPath(hash, `pack`)
if !t.IsZero() {
fi, err := d.fs.Stat(path)
@@ -224,12 +277,23 @@ func (d *DotGit) DeleteOldObjectPackAndIndex(hash plumbing.Hash, t time.Time) er
// NewObject return a writer for a new object file.
func (d *DotGit) NewObject() (*ObjectWriter, error) {
+ d.cleanObjectList()
+
return newObjectWriter(d.fs)
}
// Objects returns a slice with the hashes of objects found under the
// .git/objects/ directory.
func (d *DotGit) Objects() ([]plumbing.Hash, error) {
+ if d.options.ExclusiveAccess {
+ err := d.genObjectList()
+ if err != nil {
+ return nil, err
+ }
+
+ return d.objectList, nil
+ }
+
var objects []plumbing.Hash
err := d.ForEachObjectHash(func(hash plumbing.Hash) error {
objects = append(objects, hash)
@@ -241,9 +305,29 @@ func (d *DotGit) Objects() ([]plumbing.Hash, error) {
return objects, nil
}
-// Objects returns a slice with the hashes of objects found under the
-// .git/objects/ directory.
+// ForEachObjectHash iterates over the hashes of objects found under the
+// .git/objects/ directory and executes the provided function.
func (d *DotGit) ForEachObjectHash(fun func(plumbing.Hash) error) error {
+ if !d.options.ExclusiveAccess {
+ return d.forEachObjectHash(fun)
+ }
+
+ err := d.genObjectList()
+ if err != nil {
+ return err
+ }
+
+ for _, h := range d.objectList {
+ err := fun(h)
+ if err != nil {
+ return err
+ }
+ }
+
+ return nil
+}
+
+func (d *DotGit) forEachObjectHash(fun func(plumbing.Hash) error) error {
files, err := d.fs.ReadDir(objectsPath)
if err != nil {
if os.IsNotExist(err) {
@@ -278,6 +362,87 @@ func (d *DotGit) ForEachObjectHash(fun func(plumbing.Hash) error) error {
return nil
}
+func (d *DotGit) cleanObjectList() {
+ d.objectMap = nil
+ d.objectList = nil
+}
+
+func (d *DotGit) genObjectList() error {
+ if d.objectMap != nil {
+ return nil
+ }
+
+ d.objectMap = make(map[plumbing.Hash]struct{})
+ return d.forEachObjectHash(func(h plumbing.Hash) error {
+ d.objectList = append(d.objectList, h)
+ d.objectMap[h] = struct{}{}
+
+ return nil
+ })
+}
+
+func (d *DotGit) hasObject(h plumbing.Hash) error {
+ if !d.options.ExclusiveAccess {
+ return nil
+ }
+
+ err := d.genObjectList()
+ if err != nil {
+ return err
+ }
+
+ _, ok := d.objectMap[h]
+ if !ok {
+ return plumbing.ErrObjectNotFound
+ }
+
+ return nil
+}
+
+func (d *DotGit) cleanPackList() {
+ d.packMap = nil
+ d.packList = nil
+}
+
+func (d *DotGit) genPackList() error {
+ if d.packMap != nil {
+ return nil
+ }
+
+ op, err := d.objectPacks()
+ if err != nil {
+ return err
+ }
+
+ d.packMap = make(map[plumbing.Hash]struct{})
+ d.packList = nil
+
+ for _, h := range op {
+ d.packList = append(d.packList, h)
+ d.packMap[h] = struct{}{}
+ }
+
+ return nil
+}
+
+func (d *DotGit) hasPack(h plumbing.Hash) error {
+ if !d.options.ExclusiveAccess {
+ return nil
+ }
+
+ err := d.genPackList()
+ if err != nil {
+ return err
+ }
+
+ _, ok := d.packMap[h]
+ if !ok {
+ return ErrPackfileNotFound
+ }
+
+ return nil
+}
+
func (d *DotGit) objectPath(h plumbing.Hash) string {
hash := h.String()
return d.fs.Join(objectsPath, hash[0:2], hash[2:40])
@@ -322,6 +487,11 @@ func (d *DotGit) hasIncomingObjects() bool {
// Object returns a fs.File pointing the object file, if exists
func (d *DotGit) Object(h plumbing.Hash) (billy.File, error) {
+ err := d.hasObject(h)
+ if err != nil {
+ return nil, err
+ }
+
obj1, err1 := d.fs.Open(d.objectPath(h))
if os.IsNotExist(err1) && d.hasIncomingObjects() {
obj2, err2 := d.fs.Open(d.incomingObjectPath(h))
@@ -335,6 +505,11 @@ func (d *DotGit) Object(h plumbing.Hash) (billy.File, error) {
// ObjectStat returns a os.FileInfo pointing the object file, if exists
func (d *DotGit) ObjectStat(h plumbing.Hash) (os.FileInfo, error) {
+ err := d.hasObject(h)
+ if err != nil {
+ return nil, err
+ }
+
obj1, err1 := d.fs.Stat(d.objectPath(h))
if os.IsNotExist(err1) && d.hasIncomingObjects() {
obj2, err2 := d.fs.Stat(d.incomingObjectPath(h))
@@ -348,6 +523,8 @@ func (d *DotGit) ObjectStat(h plumbing.Hash) (os.FileInfo, error) {
// ObjectDelete removes the object file, if exists
func (d *DotGit) ObjectDelete(h plumbing.Hash) error {
+ d.cleanObjectList()
+
err1 := d.fs.Remove(d.objectPath(h))
if os.IsNotExist(err1) && d.hasIncomingObjects() {
err2 := d.fs.Remove(d.incomingObjectPath(h))
diff --git a/storage/filesystem/dotgit/dotgit_test.go b/storage/filesystem/dotgit/dotgit_test.go
index 64c2aee..c34543e 100644
--- a/storage/filesystem/dotgit/dotgit_test.go
+++ b/storage/filesystem/dotgit/dotgit_test.go
@@ -9,6 +9,7 @@ import (
"strings"
"testing"
+ "gopkg.in/src-d/go-billy.v4"
"gopkg.in/src-d/go-git.v4/plumbing"
. "gopkg.in/check.v1"
@@ -424,6 +425,18 @@ func (s *SuiteDotGit) TestObjectPacks(c *C) {
fs := f.DotGit()
dir := New(fs)
+ testObjectPacks(c, fs, dir, f)
+}
+
+func (s *SuiteDotGit) TestObjectPacksExclusive(c *C) {
+ f := fixtures.Basic().ByTag(".git").One()
+ fs := f.DotGit()
+ dir := NewWithOptions(fs, Options{ExclusiveAccess: true})
+
+ testObjectPacks(c, fs, dir, f)
+}
+
+func testObjectPacks(c *C, fs billy.Filesystem, dir *DotGit, f *fixtures.Fixture) {
hashes, err := dir.ObjectPacks()
c.Assert(err, IsNil)
c.Assert(hashes, HasLen, 1)
@@ -506,6 +519,17 @@ func (s *SuiteDotGit) TestObjects(c *C) {
fs := fixtures.ByTag(".git").ByTag("unpacked").One().DotGit()
dir := New(fs)
+ testObjects(c, fs, dir)
+}
+
+func (s *SuiteDotGit) TestObjectsExclusive(c *C) {
+ fs := fixtures.ByTag(".git").ByTag("unpacked").One().DotGit()
+ dir := NewWithOptions(fs, Options{ExclusiveAccess: true})
+
+ testObjects(c, fs, dir)
+}
+
+func testObjects(c *C, fs billy.Filesystem, dir *DotGit) {
hashes, err := dir.Objects()
c.Assert(err, IsNil)
c.Assert(hashes, HasLen, 187)