func (p *Pack) parseDeltaEntry(bytes []byte, pot PackedObjectType, oid *objects.ObjectId, i int) *PackedObject {
var (
deltaDeflated packedDelta
baseOffset int64
dp *packedObjectParser
err error
)
e := p.idx.entries[i]
switch pot {
case ObjectRefDelta:
var oid *objects.ObjectId
deltaDeflated, oid = readPackedRefDelta(bytes)
e := p.idx.entryById(oid)
if e == nil {
util.PanicErrf("nil entry for base object with id %s", oid.String())
}
baseOffset = e.offset
case ObjectOffsetDelta:
if deltaDeflated, baseOffset, err = readPackedOffsetDelta(bytes); err != nil {
util.PanicErrf("Err parsing size: %v. Could not determine size for %s", err, e.String())
}
baseOffset = e.offset - baseOffset
}
base := p.findObjectByOffset(baseOffset)
bytes = []byte(deltaDeflated)
if dp, err = newPackedObjectParser(bytes, oid); err != nil {
util.PanicErr(err.Error())
}
return dp.applyDelta(base, oid)
}
func testFirstParent(t *testing.T, repo Repository, oid *objects.ObjectId, parentOid *objects.ObjectId) {
rev := oid.String() // rev == oid here
testObjectExpected(t, repo, rev, oid, objects.ObjectCommit)
for i := 4; i <= 40; i++ {
testObjectExpected(t, repo, rev[:i]+"^", parentOid, objects.ObjectCommit)
}
}
func testFirstParentVariations(t *testing.T, repo Repository, oid *objects.ObjectId, parentOid *objects.ObjectId) {
rev := oid.String()
testObjectExpected(t, repo, rev+"^", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"^1", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~1", parentOid, objects.ObjectCommit)
}
func Test_ParseObjectId(t *testing.T) {
var oid *objects.ObjectId
oidStr := "ff6ccb68859fd52216ec8dadf98d2a00859f5369"
t1 := ObjectParserForString(oidStr)
oid = t1.ParseOid()
util.Assert(t, oid.String() == oidStr)
}
// testShortOid retrives the object by all possible combinations of
// shortening its id.
func testShortOid(t *testing.T, repo Repository, oid *objects.ObjectId) {
rev := oid.String()
for i := 4; i <= 40; i++ {
o, err := ObjectFromRevision(repo, rev[:i])
util.AssertNoErr(t, err)
util.AssertEqualString(t, o.ObjectId().String(), oid.String())
}
}
func testParentlessCommit(t *testing.T, repo Repository, oid *objects.ObjectId) {
rev := oid.String()
testObjectExpected(t, repo, rev, oid, objects.ObjectCommit)
_, err := ObjectFromRevision(repo, rev+"~1")
util.Assert(t, err != nil)
_, err = ObjectFromRevision(repo, rev+"^")
util.Assert(t, err != nil)
}
func testSecondAncestorVariations(t *testing.T, repo Repository, oid *objects.ObjectId, parentOid *objects.ObjectId) {
rev := oid.String()
testObjectExpected(t, repo, rev+"^^", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"^1^1", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"^^1", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"^1^", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~~", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~1~", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~1~1", parentOid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~~1", parentOid, objects.ObjectCommit)
}
func testPackedTagDerefInfo(t *testing.T, repo Repository, spec string, oid *objects.ObjectId) {
ref, err := repo.Ref(spec)
util.AssertNoErr(t, err)
util.AssertEqualString(t, ref.Name(), spec)
// make sure target is symbolic and matches
symbolic, target := ref.Target()
util.Assert(t, !symbolic)
if target == nil || ref.Commit() == nil {
t.Fatalf("nil target or commit")
}
util.AssertEqualString(t, ref.Commit().String(), oid.String())
}
func assertPeeledRef(t *testing.T, peeledRef objects.Ref, oid *objects.ObjectId) {
symbolic, target := peeledRef.Target()
util.Assert(t, !symbolic)
if target == nil {
t.Fatalf("nil target")
}
util.AssertEqualString(t, target.(*objects.ObjectId).String(), oid.String())
util.AssertEqualString(t, peeledRef.ObjectId().String(), oid.String())
util.AssertPanic(t, func() {
s := target.(string)
s += "" // for compilation
})
}
func (idx *Idx) entryById(oid *objects.ObjectId) *PackedObjectId {
trimmed := idx.entriesWithPrefix(oid.Bytes()[0])
if trimmed == nil {
return nil
}
id := oid.String()
if idx.idToEntry[id] != nil {
return idx.idToEntry[id]
}
gte := func(i int) bool {
var oid *objects.ObjectId
oid = trimmed[i].ObjectId
return oid.String() >= id
}
i := sort.Search(len(trimmed), gte)
if i >= len(trimmed) {
return nil
}
result := trimmed[i]
if result.ObjectId.String() != id {
return nil
}
idx.idToEntry[id] = result
return result
}
func (f *formatter) ObjectId(oid *objects.ObjectId) (int, error) {
return fmt.Fprint(f.Writer, oid.String())
}
// testObjectExpected retrieves the commit with the given revision specification
// from the given repository and ensures that this operation went well and the
// returned object in fact has the expected oid.
func testObjectExpected(t *testing.T, repo Repository, rev string, expOid *objects.ObjectId, expType objects.ObjectType) {
parent, err := ObjectFromRevision(repo, rev)
util.AssertNoErr(t, err)
util.Assert(t, parent.Header().Type() == expType)
util.AssertEqualString(t, parent.ObjectId().String(), expOid.String())
}
func testZeros(t *testing.T, repo Repository, oid *objects.ObjectId) {
rev := oid.String()
testObjectExpected(t, repo, rev+"^0", oid, objects.ObjectCommit)
testObjectExpected(t, repo, rev+"~0", oid, objects.ObjectCommit)
}
// objectFile turns an oid into a path relative to the
// git directory of a repository where that object should
// be located (if it is a loose object).
func objectFile(repo *DiskRepository, oid *objects.ObjectId) (file *os.File, err error) {
hex := oid.String()
path := path.Join(repo.path, DefaultObjectsDir, hex[0:2], hex[2:])
return os.Open(path)
}