Merge remote-tracking branch 'upstream/master' into cherrypick-commit

48 files changed, 1137 insertions, 147 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..931cc09
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,89 @@
+name: git2go CI
+on:
+  pull_request:
+  push:
+    branches:
+    - master
+    - release-*
+    - v*
+
+jobs:
+
+  build-legacy:
+    strategy:
+      fail-fast: false
+      matrix:
+        go: [ '1.9', '1.10' ]
+    name: Go ${{ matrix.go }}
+
+    runs-on: ubuntu-18.04
+
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go }}
+      id: go
+    - name: Check out code into the GOPATH
+      uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+        path: src/github.com/${{ github.repository }}
+    - name: Build
+      env:
+        GOPATH: /home/runner/work/git2go
+      run: |
+        git submodule update --init
+        make build-libgit2-static
+        go get --tags "static" github.com/${{ github.repository }}/...
+        go build --tags "static" github.com/${{ github.repository }}/...
+    - name: Test
+      env:
+        GOPATH: /home/runner/work/git2go
+      run: make test-static
+
+  build-static:
+    strategy:
+      fail-fast: false
+      matrix:
+        go: [ '1.11', '1.12', '1.13' ]
+    name: Go ${{ matrix.go }}
+
+    runs-on: ubuntu-18.04
+
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go }}
+      id: go
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v1
+    - name: Build
+      run: |
+        git submodule update --init
+        make build-libgit2-static
+    - name: Test
+      run:  make test-static
+
+  build-dynamic:
+    strategy:
+      fail-fast: false
+    name: Go (dynamic)
+
+    runs-on: ubuntu-18.04
+
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: '1.13'
+      id: go
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v1
+    - name: Build
+      run: |
+        git submodule update --init
+        make build-libgit2-dynamic
+    - name: Test
+      run: make test-dynamic
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..713781b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/static-build/
+/dynamic-build/
diff --git a/.travis.yml b/.travis.yml
index dd9f97a..b25a052 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,29 @@
 language: go
 
 go:
-  - 1.7
-  - 1.8
-  - 1.9
+  - "1.9"
+  - "1.10"
+  - "1.11"
+  - "1.12"
+  - "1.13"
   - tip
 
-script: make test-static
+install:
+  - make build-libgit2-static
+  - go get --tags "static" ./...
+
+script:
+  - make test-static
 
 matrix:
   allow_failures:
     - go: tip
 
 git:
-  submodules: false
-
-before_install:
-  - git submodule update --init
+  submodules: true
 
 branches:
   only:
   - master
   - /v\d+/
-  - next
+  - /release-.*/
diff --git a/Makefile b/Makefile
index cf00cef..182c53e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,53 @@
 default: test
 
-test: build-libgit2
+# System library
+# ==============
+# This uses whatever version of libgit2 can be found in the system.
+test:
 	go run script/check-MakeGitError-thread-lock.go
-	go test ./...
+	go test --count=1 ./...
 
-install: build-libgit2
+install:
 	go install ./...
 
-build-libgit2:
+# Bundled dynamic library
+# =======================
+# In order to avoid having to manipulate `git_dynamic.go`, which would prevent
+# the system-wide libgit2.so from being used in a sort of ergonomic way, this
+# instead moves the complexity of overriding the paths so that the built
+# libraries can be found by the build and tests.
+.PHONY: build-libgit2-dynamic
+build-libgit2-dynamic:
+	./script/build-libgit2-dynamic.sh
+
+dynamic-build/install/lib/libgit2.so:
+	./script/build-libgit2-dynamic.sh
+
+test-dynamic: dynamic-build/install/lib/libgit2.so
+	PKG_CONFIG_PATH=dynamic-build/install/lib/pkgconfig \
+			go run script/check-MakeGitError-thread-lock.go
+	PKG_CONFIG_PATH=dynamic-build/install/lib/pkgconfig \
+			LD_LIBRARY_PATH=dynamic-build/install/lib \
+			go test --count=1 ./...
+
+install-dynamic: dynamic-build/install/lib/libgit2.so
+	PKG_CONFIG_PATH=dynamic-build/install/lib/pkgconfig \
+			go install ./...
+
+# Bundled static library
+# ======================
+# This is mostly used in tests, but can also be used to provide a
+# statically-linked library with the bundled version of libgit2.
+.PHONY: build-libgit2-static
+build-libgit2-static:
 	./script/build-libgit2-static.sh
 
-install-static: build-libgit2
-	go install --tags "static" ./...
+static-build/install/lib/libgit2.a:
+	./script/build-libgit2-static.sh
 
-test-static: build-libgit2
+test-static: static-build/install/lib/libgit2.a
 	go run script/check-MakeGitError-thread-lock.go
-	go test --tags "static" ./...
+	go test --count=1 --tags "static" ./...
+
+install-static: static-build/install/lib/libgit2.a
+	go install --tags "static" ./...
diff --git a/branch.go b/branch.go
index d6e7a53..6f79825 100644
--- a/branch.go
+++ b/branch.go
@@ -208,7 +208,7 @@ func (repo *Repository) RemoteName(canonicalBranchName string) (string, error) {
 	if ret < 0 {
 		return "", MakeGitError(ret)
 	}
-	defer C.git_buf_free(&nameBuf)
+	defer C.git_buf_dispose(&nameBuf)
 
 	return C.GoString(nameBuf.ptr), nil
 }
@@ -256,7 +256,7 @@ func (repo *Repository) UpstreamName(canonicalBranchName string) (string, error)
 	if ret < 0 {
 		return "", MakeGitError(ret)
 	}
-	defer C.git_buf_free(&nameBuf)
+	defer C.git_buf_dispose(&nameBuf)
 
 	return C.GoString(nameBuf.ptr), nil
 }
diff --git a/checkout.go b/checkout.go
index db3118f..2b12058 100644
--- a/checkout.go
+++ b/checkout.go
@@ -35,7 +35,7 @@ const (
 	CheckoutDontUpdateIndex           CheckoutStrategy = C.GIT_CHECKOUT_DONT_UPDATE_INDEX            // Normally checkout updates index entries as it goes; this stops that
 	CheckoutNoRefresh                 CheckoutStrategy = C.GIT_CHECKOUT_NO_REFRESH                   // Don't refresh index/config/etc before doing checkout
 	CheckoutSkipUnmerged              CheckoutStrategy = C.GIT_CHECKOUT_SKIP_UNMERGED                // Allow checkout to skip unmerged files
-	CheckoutUserOurs                  CheckoutStrategy = C.GIT_CHECKOUT_USE_OURS                     // For unmerged files, checkout stage 2 from index
+	CheckoutUseOurs                   CheckoutStrategy = C.GIT_CHECKOUT_USE_OURS                     // For unmerged files, checkout stage 2 from index
 	CheckoutUseTheirs                 CheckoutStrategy = C.GIT_CHECKOUT_USE_THEIRS                   // For unmerged files, checkout stage 3 from index
 	CheckoutDisablePathspecMatch      CheckoutStrategy = C.GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH       // Treat pathspec as simple list of exact match file paths
 	CheckoutSkipLockedDirectories     CheckoutStrategy = C.GIT_CHECKOUT_SKIP_LOCKED_DIRECTORIES      // Ignore directories in use, they will be left empty
diff --git a/commit.go b/commit.go
index 223b093..4262060 100644
--- a/commit.go
+++ b/commit.go
@@ -28,6 +28,12 @@ func (c *Commit) Message() string {
 	return ret
 }
 
+func (c *Commit) MessageEncoding() string {
+	ret := C.GoString(C.git_commit_message_encoding(c.cast_ptr))
+	runtime.KeepAlive(c)
+	return ret
+}
+
 func (c *Commit) RawMessage() string {
 	ret := C.GoString(C.git_commit_message_raw(c.cast_ptr))
 	runtime.KeepAlive(c)
@@ -37,10 +43,10 @@ func (c *Commit) RawMessage() string {
 func (c *Commit) ExtractSignature() (string, string, error) {
 
 	var c_signed C.git_buf
-	defer C.git_buf_free(&c_signed)
+	defer C.git_buf_dispose(&c_signed)
 
 	var c_signature C.git_buf
-	defer C.git_buf_free(&c_signature)
+	defer C.git_buf_dispose(&c_signature)
 
 	oid := c.Id()
 	repo := C.git_commit_owner(c.cast_ptr)
diff --git a/config.go b/config.go
index ab9af38..7260089 100644
--- a/config.go
+++ b/config.go
@@ -134,7 +134,7 @@ func (c *Config) LookupString(name string) (string, error) {
 	if ret < 0 {
 		return "", MakeGitError(ret)
 	}
-	defer C.git_buf_free(&valBuf)
+	defer C.git_buf_dispose(&valBuf)
 
 	return C.GoString(valBuf.ptr), nil
 }
@@ -344,7 +344,7 @@ func (c *Config) OpenLevel(parent *Config, level ConfigLevel) (*Config, error) {
 }
 
 // OpenOndisk creates a new config instance containing a single on-disk file
-func OpenOndisk(parent *Config, path string) (*Config, error) {
+func OpenOndisk(path string) (*Config, error) {
 	cpath := C.CString(path)
 	defer C.free(unsafe.Pointer(cpath))
 
@@ -390,7 +390,7 @@ func (iter *ConfigIterator) Free() {
 
 func ConfigFindGlobal() (string, error) {
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -405,7 +405,7 @@ func ConfigFindGlobal() (string, error) {
 
 func ConfigFindSystem() (string, error) {
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -420,7 +420,7 @@ func ConfigFindSystem() (string, error) {
 
 func ConfigFindXDG() (string, error) {
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -438,7 +438,7 @@ func ConfigFindXDG() (string, error) {
 // Look for the file in %PROGRAMDATA%\Git\config used by portable git.
 func ConfigFindProgramdata() (string, error) {
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
diff --git a/config_test.go b/config_test.go
index 196d4ad..398236e 100644
--- a/config_test.go
+++ b/config_test.go
@@ -13,7 +13,7 @@ func setupConfig() (*Config, error) {
 		err error
 	)
 
-	c, err = OpenOndisk(nil, tempConfig)
+	c, err = OpenOndisk(tempConfig)
 	if err != nil {
 		return nil, err
 	}
diff --git a/credentials.go b/credentials.go
index 4e42b6e..038313b 100644
--- a/credentials.go
+++ b/credentials.go
@@ -2,6 +2,9 @@ package git
 
 /*
 #include <git2.h>
+#include <git2/sys/cred.h>
+
+git_credtype_t _go_git_cred_credtype(git_cred *cred);
 */
 import "C"
 import "unsafe"
@@ -27,7 +30,7 @@ func (o *Cred) HasUsername() bool {
 }
 
 func (o *Cred) Type() CredType {
-	return (CredType)(o.ptr.credtype)
+	return (CredType)(C._go_git_cred_credtype(o.ptr))
 }
 
 func credFromC(ptr *C.git_cred) *Cred {
diff --git a/delta_string.go b/delta_string.go
new file mode 100644
index 0000000..53e02bd
--- /dev/null
+++ b/delta_string.go
@@ -0,0 +1,33 @@
+// Code generated by "stringer -type Delta -trimprefix Delta -tags static"; DO NOT EDIT.
+
+package git
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[DeltaUnmodified-0]
+	_ = x[DeltaAdded-1]
+	_ = x[DeltaDeleted-2]
+	_ = x[DeltaModified-3]
+	_ = x[DeltaRenamed-4]
+	_ = x[DeltaCopied-5]
+	_ = x[DeltaIgnored-6]
+	_ = x[DeltaUntracked-7]
+	_ = x[DeltaTypeChange-8]
+	_ = x[DeltaUnreadable-9]
+	_ = x[DeltaConflicted-10]
+}
+
+const _Delta_name = "UnmodifiedAddedDeletedModifiedRenamedCopiedIgnoredUntrackedTypeChangeUnreadableConflicted"
+
+var _Delta_index = [...]uint8{0, 10, 15, 22, 30, 37, 43, 50, 59, 69, 79, 89}
+
+func (i Delta) String() string {
+	if i < 0 || i >= Delta(len(_Delta_index)-1) {
+		return "Delta(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Delta_name[_Delta_index[i]:_Delta_index[i+1]]
+}
diff --git a/describe.go b/describe.go
index 0b75076..f7036df 100644
--- a/describe.go
+++ b/describe.go
@@ -212,7 +212,7 @@ func (result *DescribeResult) Format(opts *DescribeFormatOptions) (string, error
 	if ecode < 0 {
 		return "", MakeGitError(ecode)
 	}
-	defer C.git_buf_free(&resultBuf)
+	defer C.git_buf_dispose(&resultBuf)
 
 	return C.GoString(resultBuf.ptr), nil
 }
diff --git a/diff.go b/diff.go
index 3088320..ed2949c 100644
--- a/diff.go
+++ b/diff.go
@@ -39,6 +39,8 @@ const (
 	DeltaConflicted Delta = C.GIT_DELTA_CONFLICTED
 )
 
+//go:generate stringer -type Delta -trimprefix Delta -tags static
+
 type DiffLineType int
 
 const (
@@ -54,6 +56,8 @@ const (
 	DiffLineBinary  DiffLineType = C.GIT_DIFF_LINE_BINARY
 )
 
+//go:generate stringer -type DiffLineType -trimprefix DiffLine -tags static
+
 type DiffFile struct {
 	Path  string
 	Oid   *Oid
@@ -246,7 +250,7 @@ const (
 func (stats *DiffStats) String(format DiffStatsFormat,
 	width uint) (string, error) {
 	buf := C.git_buf{}
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -284,7 +288,7 @@ type diffForEachData struct {
 	Error        error
 }
 
-type DiffForEachFileCallback func(DiffDelta, float64) (DiffForEachHunkCallback, error)
+type DiffForEachFileCallback func(delta DiffDelta, progress float64) (DiffForEachHunkCallback, error)
 
 type DiffDetail int
 
@@ -405,6 +409,36 @@ func (diff *Diff) Patch(deltaIndex int) (*Patch, error) {
 	return newPatchFromC(patchPtr), nil
 }
 
+type DiffFormat int
+
+const (
+	DiffFormatPatch       DiffFormat = C.GIT_DIFF_FORMAT_PATCH
+	DiffFormatPatchHeader DiffFormat = C.GIT_DIFF_FORMAT_PATCH_HEADER
+	DiffFormatRaw         DiffFormat = C.GIT_DIFF_FORMAT_RAW
+	DiffFormatNameOnly    DiffFormat = C.GIT_DIFF_FORMAT_NAME_ONLY
+	DiffFormatNameStatus  DiffFormat = C.GIT_DIFF_FORMAT_NAME_STATUS
+)
+
+func (diff *Diff) ToBuf(format DiffFormat) ([]byte, error) {
+	if diff.ptr == nil {
+		return nil, ErrInvalid
+	}
+
+	diffBuf := C.git_buf{}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ecode := C.git_diff_to_buf(&diffBuf, diff.ptr, C.git_diff_format_t(format))
+	runtime.KeepAlive(diff)
+	if ecode < 0 {
+		return nil, MakeGitError(ecode)
+	}
+	defer C.git_buf_free(&diffBuf)
+
+	return C.GoBytes(unsafe.Pointer(diffBuf.ptr), C.int(diffBuf.size)), nil
+}
+
 type DiffOptionsFlag int
 
 const (
diff --git a/difflinetype_string.go b/difflinetype_string.go
new file mode 100644
index 0000000..3c1ad58
--- /dev/null
+++ b/difflinetype_string.go
@@ -0,0 +1,56 @@
+// Code generated by "stringer -type DiffLineType -trimprefix DiffLine -tags static"; DO NOT EDIT.
+
+package git
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[DiffLineContext-32]
+	_ = x[DiffLineAddition-43]
+	_ = x[DiffLineDeletion-45]
+	_ = x[DiffLineContextEOFNL-61]
+	_ = x[DiffLineAddEOFNL-62]
+	_ = x[DiffLineDelEOFNL-60]
+	_ = x[DiffLineFileHdr-70]
+	_ = x[DiffLineHunkHdr-72]
+	_ = x[DiffLineBinary-66]
+}
+
+const (
+	_DiffLineType_name_0 = "Context"
+	_DiffLineType_name_1 = "Addition"
+	_DiffLineType_name_2 = "Deletion"
+	_DiffLineType_name_3 = "DelEOFNLContextEOFNLAddEOFNL"
+	_DiffLineType_name_4 = "Binary"
+	_DiffLineType_name_5 = "FileHdr"
+	_DiffLineType_name_6 = "HunkHdr"
+)
+
+var (
+	_DiffLineType_index_3 = [...]uint8{0, 8, 20, 28}
+)
+
+func (i DiffLineType) String() string {
+	switch {
+	case i == 32:
+		return _DiffLineType_name_0
+	case i == 43:
+		return _DiffLineType_name_1
+	case i == 45:
+		return _DiffLineType_name_2
+	case 60 <= i && i <= 62:
+		i -= 60
+		return _DiffLineType_name_3[_DiffLineType_index_3[i]:_DiffLineType_index_3[i+1]]
+	case i == 66:
+		return _DiffLineType_name_4
+	case i == 70:
+		return _DiffLineType_name_5
+	case i == 72:
+		return _DiffLineType_name_6
+	default:
+		return "DiffLineType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}
diff --git a/git.go b/git.go
index 0925e45..968d404 100644
--- a/git.go
+++ b/git.go
@@ -189,22 +189,16 @@ func (oid *Oid) Cmp(oid2 *Oid) int {
 }
 
 func (oid *Oid) Copy() *Oid {
-	ret := new(Oid)
-	copy(ret[:], oid[:])
-	return ret
+	ret := *oid
+	return &ret
 }
 
 func (oid *Oid) Equal(oid2 *Oid) bool {
-	return bytes.Equal(oid[:], oid2[:])
+	return *oid == *oid2
 }
 
 func (oid *Oid) IsZero() bool {
-	for _, a := range oid {
-		if a != 0 {
-			return false
-		}
-	}
-	return true
+	return *oid == Oid{}
 }
 
 func (oid *Oid) NCmp(oid2 *Oid, n uint) int {
@@ -309,7 +303,7 @@ func Discover(start string, across_fs bool, ceiling_dirs []string) (string, erro
 	defer C.free(unsafe.Pointer(cstart))
 
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
diff --git a/git_dynamic.go b/git_dynamic.go
index 00828a5..06deeeb 100644
--- a/git_dynamic.go
+++ b/git_dynamic.go
@@ -6,8 +6,8 @@ package git
 #include <git2.h>
 #cgo pkg-config: libgit2
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 26
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.26"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 28
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.28"
 #endif
 
 */
diff --git a/git_static.go b/git_static.go
index b42d49f..d7c2295 100644
--- a/git_static.go
+++ b/git_static.go
@@ -3,14 +3,13 @@
 package git
 
 /*
-#cgo CFLAGS: -I${SRCDIR}/vendor/libgit2/include
-#cgo LDFLAGS: -L${SRCDIR}/vendor/libgit2/build/ -lgit2
-#cgo windows LDFLAGS: -lwinhttp
-#cgo !windows pkg-config: --static ${SRCDIR}/vendor/libgit2/build/libgit2.pc
+#cgo windows CFLAGS: -I${SRCDIR}/static-build/install/include/
+#cgo windows LDFLAGS: -L${SRCDIR}/static-build/install/lib/ -lgit2 -lwinhttp
+#cgo !windows pkg-config: --static ${SRCDIR}/static-build/install/lib/pkgconfig/libgit2.pc
 #include <git2.h>
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 26
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.26"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 28
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.28"
 #endif
 
 */
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..7a68658
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/libgit2/git2go
+
+go 1.13
diff --git a/index.go b/index.go
index 5106516..50538bd 100644
--- a/index.go
+++ b/index.go
@@ -90,7 +90,9 @@ func populateCIndexEntry(source *IndexEntry, dest *C.git_index_entry) {
 	dest.uid = C.uint32_t(source.Uid)
 	dest.gid = C.uint32_t(source.Gid)
 	dest.file_size = C.uint32_t(source.Size)
-	dest.id = *source.Id.toC()
+	if source.Id != nil {
+		dest.id = *source.Id.toC()
+	}
 	dest.path = C.CString(source.Path)
 }
 
@@ -145,6 +147,20 @@ func (v *Index) Path() string {
 	return ret
 }
 
+// Clear clears the index object in memory; changes must be explicitly
+// written to disk for them to take effect persistently
+func (v *Index) Clear() error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	err := C.git_index_clear(v.ptr)
+	runtime.KeepAlive(v)
+	if err < 0 {
+		return MakeGitError(err)
+	}
+	return nil
+}
+
 // Add adds or replaces the given entry to the index, making a copy of
 // the data
 func (v *Index) Add(entry *IndexEntry) error {
@@ -181,6 +197,28 @@ func (v *Index) AddByPath(path string) error {
 	return nil
 }
 
+// AddFromBuffer adds or replaces an index entry from a buffer in memory
+func (v *Index) AddFromBuffer(entry *IndexEntry, buffer []byte) error {
+	var centry C.git_index_entry
+
+	populateCIndexEntry(entry, &centry)
+	defer freeCIndexEntry(&centry)
+
+	var cbuffer unsafe.Pointer
+	if len(buffer) > 0 {
+		cbuffer = unsafe.Pointer(&buffer[0])
+	}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if err := C.git_index_add_from_buffer(v.ptr, &centry, cbuffer, C.size_t(len(buffer))); err < 0 {
+		return MakeGitError(err)
+	}
+
+	return nil
+}
+
 func (v *Index) AddAll(pathspecs []string, flags IndexAddOpts, callback IndexMatchedPathCallback) error {
 	cpathspecs := C.git_strarray{}
 	cpathspecs.count = C.size_t(len(pathspecs))
diff --git a/index_test.go b/index_test.go
index f47dace..5fa3f9f 100644
--- a/index_test.go
+++ b/index_test.go
@@ -3,6 +3,7 @@ package git
 import (
 	"io/ioutil"
 	"os"
+	"path"
 	"runtime"
 	"testing"
 )
@@ -59,14 +60,29 @@ func TestIndexWriteTreeTo(t *testing.T) {
 	repo := createTestRepo(t)
 	defer cleanupTestRepo(t, repo)
 
-	repo2 := createTestRepo(t)
-	defer cleanupTestRepo(t, repo2)
+	idx, err := NewIndex()
+	checkFatal(t, err)
 
-	idx, err := repo.Index()
+	odb, err := repo.Odb()
 	checkFatal(t, err)
-	err = idx.AddByPath("README")
+
+	content, err := ioutil.ReadFile(path.Join(repo.Workdir(), "README"))
 	checkFatal(t, err)
-	treeId, err := idx.WriteTreeTo(repo2)
+
+	id, err := odb.Write(content, ObjectBlob)
+	checkFatal(t, err)
+
+	err = idx.Add(&IndexEntry{
+		Mode: FilemodeBlob,
+		Uid:  0,
+		Gid:  0,
+		Size: uint32(len(content)),
+		Id:   id,
+		Path: "README",
+	})
+	checkFatal(t, err)
+
+	treeId, err := idx.WriteTreeTo(repo)
 	checkFatal(t, err)
 
 	if treeId.String() != "b7119b11e8ef7a1a5a34d3ac87f5b075228ac81e" {
@@ -149,6 +165,30 @@ func TestIndexRemoveDirectory(t *testing.T) {
 	}
 }
 
+func TestIndexAddFromBuffer(t *testing.T) {
+	t.Parallel()
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	idx, err := repo.Index()
+	checkFatal(t, err)
+
+	entry := IndexEntry{
+		Path: "README",
+		Mode: FilemodeBlob,
+	}
+
+	err = idx.AddFromBuffer(&entry, []byte("foo\n"))
+	checkFatal(t, err)
+
+	treeId, err := idx.WriteTreeTo(repo)
+	checkFatal(t, err)
+
+	if treeId.String() != "b7119b11e8ef7a1a5a34d3ac87f5b075228ac81e" {
+		t.Fatalf("%v", treeId.String())
+	}
+}
+
 func TestIndexAddAllNoCallback(t *testing.T) {
 	t.Parallel()
 	repo := createTestRepo(t)
diff --git a/mempack.go b/mempack.go
new file mode 100644
index 0000000..bdea224
--- /dev/null
+++ b/mempack.go
@@ -0,0 +1,91 @@
+package git
+
+/*
+#include <git2.h>
+#include <git2/sys/mempack.h>
+
+extern int git_mempack_new(git_odb_backend **out);
+extern int git_mempack_dump(git_buf *pack, git_repository *repo, git_odb_backend *backend);
+extern int git_mempack_reset(git_odb_backend *backend);
+extern void _go_git_odb_backend_free(git_odb_backend *backend);
+*/
+import "C"
+
+import (
+	"runtime"
+	"unsafe"
+)
+
+// Mempack is a custom ODB backend that permits packing object in-memory.
+type Mempack struct {
+	ptr *C.git_odb_backend
+}
+
+// NewMempack creates a new mempack instance and registers it to the ODB.
+func NewMempack(odb *Odb) (mempack *Mempack, err error) {
+	mempack = new(Mempack)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_mempack_new(&mempack.ptr)
+	if ret < 0 {
+		return nil, MakeGitError(ret)
+	}
+
+	ret = C.git_odb_add_backend(odb.ptr, mempack.ptr, C.int(999))
+	runtime.KeepAlive(odb)
+	if ret < 0 {
+		// Since git_odb_add_alternate() takes ownership of the ODB backend, the
+		// only case in which we free the mempack's memory is if it fails to be
+		// added to the ODB.
+		C._go_git_odb_backend_free(mempack.ptr)
+		return nil, MakeGitError(ret)
+	}
+
+	return mempack, nil
+}
+
+// Dump dumps all the queued in-memory writes to a packfile.
+//
+// It is the caller's responsibility to ensure that the generated packfile is
+// available to the repository (e.g. by writing it to disk, or doing something
+// crazy like distributing it across several copies of the repository over a
+// network).
+//
+// Once the generated packfile is available to the repository, call
+// Mempack.Reset to cleanup the memory store.
+//
+// Calling Mempack.Reset before the packfile has been written to disk will
+// result in an inconsistent repository (the objects in the memory store won't
+// be accessible).
+func (mempack *Mempack) Dump(repository *Repository) ([]byte, error) {
+	buf := C.git_buf{}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_mempack_dump(&buf, repository.ptr, mempack.ptr)
+	runtime.KeepAlive(repository)
+	if ret < 0 {
+		return nil, MakeGitError(ret)
+	}
+	defer C.git_buf_dispose(&buf)
+
+	return C.GoBytes(unsafe.Pointer(buf.ptr), C.int(buf.size)), nil
+}
+
+// Reset resets the memory packer by clearing all the queued objects.
+//
+// This assumes that Mempack.Dump has been called before to store all the
+// queued objects into a single packfile.
+func (mempack *Mempack) Reset() error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_mempack_reset(mempack.ptr)
+	if ret < 0 {
+		return MakeGitError(ret)
+	}
+	return nil
+}
diff --git a/mempack_test.go b/mempack_test.go
new file mode 100644
index 0000000..3e31dcf
--- /dev/null
+++ b/mempack_test.go
@@ -0,0 +1,60 @@
+package git
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestMempack(t *testing.T) {
+	t.Parallel()
+
+	odb, err := NewOdb()
+	checkFatal(t, err)
+
+	repo, err := NewRepositoryWrapOdb(odb)
+	checkFatal(t, err)
+
+	mempack, err := NewMempack(odb)
+	checkFatal(t, err)
+
+	id, err := odb.Write([]byte("hello, world!"), ObjectBlob)
+	checkFatal(t, err)
+
+	expectedId, err := NewOid("30f51a3fba5274d53522d0f19748456974647b4f")
+	checkFatal(t, err)
+	if !expectedId.Equal(id) {
+		t.Errorf("mismatched id. expected %v, got %v", expectedId.String(), id.String())
+	}
+
+	// The object should be available from the odb.
+	{
+		obj, err := odb.Read(expectedId)
+		checkFatal(t, err)
+		defer obj.Free()
+	}
+
+	data, err := mempack.Dump(repo)
+	checkFatal(t, err)
+
+	expectedData := []byte{
+		0x50, 0x41, 0x43, 0x4b, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00,
+		0x02, 0x9d, 0x08, 0x82, 0x3b, 0xd8, 0xa8, 0xea, 0xb5, 0x10, 0xad, 0x6a,
+		0xc7, 0x5c, 0x82, 0x3c, 0xfd, 0x3e, 0xd3, 0x1e,
+	}
+	if !bytes.Equal(expectedData, data) {
+		t.Errorf("mismatched mempack data. expected %v, got %v", expectedData, data)
+	}
+
+	mempack.Reset()
+
+	// After the reset, the object should now be unavailable.
+	{
+		obj, err := odb.Read(expectedId)
+		if err == nil {
+			t.Errorf("object %s unexpectedly found", obj.Id().String())
+			obj.Free()
+		} else if !IsErrorCode(err, ErrNotFound) {
+			t.Errorf("unexpected error %v", err)
+		}
+	}
+}
diff --git a/merge.go b/merge.go
index bfbf9a3..06e98a0 100644
--- a/merge.go
+++ b/merge.go
@@ -27,6 +27,15 @@ func newAnnotatedCommitFromC(ptr *C.git_annotated_commit, r *Repository) *Annota
 	return mh
 }
 
+func (mh *AnnotatedCommit) Id() *Oid {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := newOidFromC(C.git_annotated_commit_id(mh.ptr))
+	runtime.KeepAlive(mh)
+	return ret
+}
+
 func (mh *AnnotatedCommit) Free() {
 	runtime.SetFinalizer(mh, nil)
 	C.git_annotated_commit_free(mh.ptr)
@@ -49,7 +58,9 @@ func (r *Repository) AnnotatedCommitFromFetchHead(branchName string, remoteURL s
 		return nil, MakeGitError(ret)
 	}
 
-	return newAnnotatedCommitFromC(ptr, r), nil
+	annotatedCommit := newAnnotatedCommitFromC(ptr, r)
+	runtime.KeepAlive(r)
+	return annotatedCommit, nil
 }
 
 func (r *Repository) LookupAnnotatedCommit(oid *Oid) (*AnnotatedCommit, error) {
@@ -62,7 +73,10 @@ func (r *Repository) LookupAnnotatedCommit(oid *Oid) (*AnnotatedCommit, error) {
 	if ret < 0 {
 		return nil, MakeGitError(ret)
 	}
-	return newAnnotatedCommitFromC(ptr, r), nil
+
+	annotatedCommit := newAnnotatedCommitFromC(ptr, r)
+	runtime.KeepAlive(r)
+	return annotatedCommit, nil
 }
 
 func (r *Repository) AnnotatedCommitFromRef(ref *Reference) (*AnnotatedCommit, error) {
@@ -76,7 +90,29 @@ func (r *Repository) AnnotatedCommitFromRef(ref *Reference) (*AnnotatedCommit, e
 	if ret < 0 {
 		return nil, MakeGitError(ret)
 	}
-	return newAnnotatedCommitFromC(ptr, r), nil
+
+	annotatedCommit := newAnnotatedCommitFromC(ptr, r)
+	runtime.KeepAlive(r)
+	return annotatedCommit, nil
+}
+
+func (r *Repository) AnnotatedCommitFromRevspec(spec string) (*AnnotatedCommit, error) {
+	crevspec := C.CString(spec)
+	defer C.free(unsafe.Pointer(crevspec))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var ptr *C.git_annotated_commit
+	ret := C.git_annotated_commit_from_revspec(&ptr, r.ptr, crevspec)
+	runtime.KeepAlive(r)
+	if ret < 0 {
+		return nil, MakeGitError(ret)
+	}
+
+	annotatedCommit := newAnnotatedCommitFromC(ptr, r)
+	runtime.KeepAlive(r)
+	return annotatedCommit, nil
 }
 
 type MergeTreeFlag int
@@ -132,7 +168,7 @@ func (mo *MergeOptions) toC() *C.git_merge_options {
 	}
 	return &C.git_merge_options{
 		version:          C.uint(mo.Version),
-		flags:            C.git_merge_flag_t(mo.TreeFlags),
+		flags:            C.uint32_t(mo.TreeFlags),
 		rename_threshold: C.uint(mo.RenameThreshold),
 		target_limit:     C.uint(mo.TargetLimit),
 		file_favor:       C.git_merge_file_favor_t(mo.FileFavor),
@@ -344,9 +380,29 @@ type MergeFileFlags int
 const (
 	MergeFileDefault MergeFileFlags = C.GIT_MERGE_FILE_DEFAULT
 
-	MergeFileStyleMerge         MergeFileFlags = C.GIT_MERGE_FILE_STYLE_MERGE
-	MergeFileStyleDiff          MergeFileFlags = C.GIT_MERGE_FILE_STYLE_DIFF3
+	// Create standard conflicted merge files
+	MergeFileStyleMerge MergeFileFlags = C.GIT_MERGE_FILE_STYLE_MERGE
+
+	// Create diff3-style files
+	MergeFileStyleDiff MergeFileFlags = C.GIT_MERGE_FILE_STYLE_DIFF3
+
+	// Condense non-alphanumeric regions for simplified diff file
 	MergeFileStyleSimplifyAlnum MergeFileFlags = C.GIT_MERGE_FILE_SIMPLIFY_ALNUM
+
+	// Ignore all whitespace
+	MergeFileIgnoreWhitespace MergeFileFlags = C.GIT_MERGE_FILE_IGNORE_WHITESPACE
+
+	// Ignore changes in amount of whitespace
+	MergeFileIgnoreWhitespaceChange MergeFileFlags = C.GIT_MERGE_FILE_IGNORE_WHITESPACE_CHANGE
+
+	// Ignore whitespace at end of line
+	MergeFileIgnoreWhitespaceEOL MergeFileFlags = C.GIT_MERGE_FILE_IGNORE_WHITESPACE_EOL
+
+	// Use the "patience diff" algorithm
+	MergeFileDiffPatience MergeFileFlags = C.GIT_MERGE_FILE_DIFF_PATIENCE
+
+	// Take extra time to find minimal diff
+	MergeFileDiffMinimal MergeFileFlags = C.GIT_MERGE_FILE_DIFF_MINIMAL
 )
 
 type MergeFileOptions struct {
@@ -355,6 +411,7 @@ type MergeFileOptions struct {
 	TheirLabel    string
 	Favor         MergeFileFavor
 	Flags         MergeFileFlags
+	MarkerSize    uint16
 }
 
 func mergeFileOptionsFromC(c C.git_merge_file_options) MergeFileOptions {
@@ -364,6 +421,7 @@ func mergeFileOptionsFromC(c C.git_merge_file_options) MergeFileOptions {
 		TheirLabel:    C.GoString(c.their_label),
 		Favor:         MergeFileFavor(c.favor),
 		Flags:         MergeFileFlags(c.flags),
+		MarkerSize:    uint16(c.marker_size),
 	}
 }
 
@@ -372,7 +430,8 @@ func populateCMergeFileOptions(c *C.git_merge_file_options, options MergeFileOpt
 	c.our_label = C.CString(options.OurLabel)
 	c.their_label = C.CString(options.TheirLabel)
 	c.favor = C.git_merge_file_favor_t(options.Favor)
-	c.flags = C.git_merge_file_flag_t(options.Flags)
+	c.flags = C.uint32_t(options.Flags)
+	c.marker_size = C.ushort(options.MarkerSize)
 }
 
 func freeCMergeFileOptions(c *C.git_merge_file_options) {
diff --git a/merge_test.go b/merge_test.go
index f2c84bc..7cf034f 100644
--- a/merge_test.go
+++ b/merge_test.go
@@ -5,6 +5,22 @@ import (
 	"time"
 )
 
+func TestAnnotatedCommitFromRevspec(t *testing.T) {
+	t.Parallel()
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	seedTestRepo(t, repo)
+
+	mergeHead, err := repo.AnnotatedCommitFromRevspec("refs/heads/master")
+	checkFatal(t, err)
+
+	expectedId := "473bf778b67b6d53e2ab289e0f1a2e8addef2fc2"
+	if mergeHead.Id().String() != expectedId {
+		t.Errorf("mergeHead.Id() = %v, want %v", mergeHead.Id(), expectedId)
+	}
+}
+
 func TestMergeWithSelf(t *testing.T) {
 	t.Parallel()
 	repo := createTestRepo(t)
@@ -18,6 +34,11 @@ func TestMergeWithSelf(t *testing.T) {
 	mergeHead, err := repo.AnnotatedCommitFromRef(master)
 	checkFatal(t, err)
 
+	expectedId := "473bf778b67b6d53e2ab289e0f1a2e8addef2fc2"
+	if mergeHead.Id().String() != expectedId {
+		t.Errorf("mergeHead.Id() = %v, want %v", mergeHead.Id(), expectedId)
+	}
+
 	mergeHeads := make([]*AnnotatedCommit, 1)
 	mergeHeads[0] = mergeHead
 	err = repo.Merge(mergeHeads, nil, nil)
diff --git a/note.go b/note.go
index 21bed57..9df1b9d 100644
--- a/note.go
+++ b/note.go
@@ -132,7 +132,7 @@ func (c *NoteCollection) DefaultRef() (string, error) {
 	}
 
 	ret := C.GoString(buf.ptr)
-	C.git_buf_free(&buf)
+	C.git_buf_dispose(&buf)
 
 	return ret, nil
 }
diff --git a/object.go b/object.go
index 5505e35..2d75b06 100644
--- a/object.go
+++ b/object.go
@@ -13,12 +13,12 @@ import (
 type ObjectType int
 
 const (
-	ObjectAny    ObjectType = C.GIT_OBJ_ANY
-	ObjectBad    ObjectType = C.GIT_OBJ_BAD
-	ObjectCommit ObjectType = C.GIT_OBJ_COMMIT
-	ObjectTree   ObjectType = C.GIT_OBJ_TREE
-	ObjectBlob   ObjectType = C.GIT_OBJ_BLOB
-	ObjectTag    ObjectType = C.GIT_OBJ_TAG
+	ObjectAny     ObjectType = C.GIT_OBJECT_ANY
+	ObjectInvalid ObjectType = C.GIT_OBJECT_INVALID
+	ObjectCommit  ObjectType = C.GIT_OBJECT_COMMIT
+	ObjectTree    ObjectType = C.GIT_OBJECT_TREE
+	ObjectBlob    ObjectType = C.GIT_OBJECT_BLOB
+	ObjectTag     ObjectType = C.GIT_OBJECT_TAG
 )
 
 type Object struct {
@@ -35,8 +35,8 @@ func (t ObjectType) String() string {
 	switch t {
 	case ObjectAny:
 		return "Any"
-	case ObjectBad:
-		return "Bad"
+	case ObjectInvalid:
+		return "Invalid"
 	case ObjectCommit:
 		return "Commit"
 	case ObjectTree:
@@ -67,7 +67,7 @@ func (o *Object) ShortId() (string, error) {
 	if ecode < 0 {
 		return "", MakeGitError(ecode)
 	}
-	defer C.git_buf_free(&resultBuf)
+	defer C.git_buf_dispose(&resultBuf)
 	return C.GoString(resultBuf.ptr), nil
 }
 
@@ -217,7 +217,7 @@ func (o *Object) Peel(t ObjectType) (*Object, error) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	err := C.git_object_peel(&cobj, o.ptr, C.git_otype(t))
+	err := C.git_object_peel(&cobj, o.ptr, C.git_object_t(t))
 	runtime.KeepAlive(o)
 	if err < 0 {
 		return nil, MakeGitError(err)
diff --git a/odb.go b/odb.go
index 64c5415..6489653 100644
--- a/odb.go
+++ b/odb.go
@@ -8,6 +8,7 @@ extern void _go_git_odb_backend_free(git_odb_backend *backend);
 */
 import "C"
 import (
+	"io"
 	"reflect"
 	"runtime"
 	"unsafe"
@@ -60,12 +61,12 @@ func (v *Odb) ReadHeader(oid *Oid) (uint64, ObjectType, error) {
 	defer runtime.UnlockOSThread()
 
 	var sz C.size_t
-	var cotype C.git_otype
+	var cotype C.git_object_t
 
 	ret := C.git_odb_read_header(&sz, &cotype, v.ptr, oid.toC())
 	runtime.KeepAlive(v)
 	if ret < 0 {
-		return 0, C.GIT_OBJ_BAD, MakeGitError(ret)
+		return 0, ObjectInvalid, MakeGitError(ret)
 	}
 
 	return uint64(sz), ObjectType(cotype), nil
@@ -80,15 +81,19 @@ func (v *Odb) Exists(oid *Oid) bool {
 
 func (v *Odb) Write(data []byte, otype ObjectType) (oid *Oid, err error) {
 	oid = new(Oid)
-	var cptr unsafe.Pointer
-	if len(data) > 0 {
-		cptr = unsafe.Pointer(&data[0])
-	}
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_odb_write(oid.toC(), v.ptr, cptr, C.size_t(len(data)), C.git_otype(otype))
+	var size C.size_t
+	if len(data) > 0 {
+		size = C.size_t(len(data))
+	} else {
+		data = []byte{0}
+		size = C.size_t(0)
+	}
+
+	ret := C.git_odb_write(oid.toC(), v.ptr, unsafe.Pointer(&data[0]), size, C.git_object_t(otype))
 	runtime.KeepAlive(v)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
@@ -164,13 +169,19 @@ func (v *Odb) ForEach(callback OdbForEachCallback) error {
 // Hash determines the object-ID (sha1) of a data buffer.
 func (v *Odb) Hash(data []byte, otype ObjectType) (oid *Oid, err error) {
 	oid = new(Oid)
-	header := (*reflect.SliceHeader)(unsafe.Pointer(&data))
-	ptr := unsafe.Pointer(header.Data)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_odb_hash(oid.toC(), ptr, C.size_t(header.Len), C.git_otype(otype))
+	var size C.size_t
+	if len(data) > 0 {
+		size = C.size_t(len(data))
+	} else {
+		data = []byte{0}
+		size = C.size_t(0)
+	}
+
+	ret := C.git_odb_hash(oid.toC(), unsafe.Pointer(&data[0]), size, C.git_object_t(otype))
 	runtime.KeepAlive(data)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
@@ -182,17 +193,21 @@ func (v *Odb) Hash(data []byte, otype ObjectType) (oid *Oid, err error) {
 // contents of the object.
 func (v *Odb) NewReadStream(id *Oid) (*OdbReadStream, error) {
 	stream := new(OdbReadStream)
+	var ctype C.git_object_t
+	var csize C.size_t
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_odb_open_rstream(&stream.ptr, v.ptr, id.toC())
+	ret := C.git_odb_open_rstream(&stream.ptr, &csize, &ctype, v.ptr, id.toC())
 	runtime.KeepAlive(v)
 	runtime.KeepAlive(id)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
 	}
 
+	stream.Size = uint64(csize)
+	stream.Type = ObjectType(ctype)
 	runtime.SetFinalizer(stream, (*OdbReadStream).Free)
 	return stream, nil
 }
@@ -206,7 +221,7 @@ func (v *Odb) NewWriteStream(size int64, otype ObjectType) (*OdbWriteStream, err
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_odb_open_wstream(&stream.ptr, v.ptr, C.git_off_t(size), C.git_otype(otype))
+	ret := C.git_odb_open_wstream(&stream.ptr, v.ptr, C.git_object_size_t(size), C.git_object_t(otype))
 	runtime.KeepAlive(v)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
@@ -264,7 +279,9 @@ func (object *OdbObject) Data() (data []byte) {
 }
 
 type OdbReadStream struct {
-	ptr *C.git_odb_stream
+	ptr  *C.git_odb_stream
+	Size uint64
+	Type ObjectType
 }
 
 // Read reads from the stream
@@ -281,6 +298,9 @@ func (stream *OdbReadStream) Read(data []byte) (int, error) {
 	if ret < 0 {
 		return 0, MakeGitError(ret)
 	}
+	if ret == 0 {
+		return 0, io.EOF
+	}
 
 	header.Len = int(ret)
 
diff --git a/odb_test.go b/odb_test.go
index 3d22fc9..46acdba 100644
--- a/odb_test.go
+++ b/odb_test.go
@@ -1,12 +1,14 @@
 package git
 
 import (
+	"bytes"
 	"errors"
 	"io"
+	"io/ioutil"
 	"testing"
 )
 
-func TestOdbReadHeader(t *testing.T) {
+func TestOdbRead(t *testing.T) {
 	t.Parallel()
 	repo := createTestRepo(t)
 	defer cleanupTestRepo(t, repo)
@@ -26,13 +28,27 @@ func TestOdbReadHeader(t *testing.T) {
 	if err != nil {
 		t.Fatalf("ReadHeader: %v", err)
 	}
-	
+
 	if sz != uint64(len(data)) {
 		t.Errorf("ReadHeader got size %d, want %d", sz, len(data))
 	}
 	if typ != ObjectBlob {
 		t.Errorf("ReadHeader got object type %s", typ)
 	}
+
+	obj, err := odb.Read(id)
+	if err != nil {
+		t.Fatalf("Read: %v", err)
+	}
+	if !bytes.Equal(obj.Data(), data) {
+		t.Errorf("Read got wrong data")
+	}
+	if sz := obj.Len(); sz != uint64(len(data)) {
+		t.Errorf("Read got size %d, want %d", sz, len(data))
+	}
+	if typ := obj.Type(); typ != ObjectBlob {
+		t.Errorf("Read got object type %s", typ)
+	}
 }
 
 func TestOdbStream(t *testing.T) {
@@ -47,22 +63,29 @@ func TestOdbStream(t *testing.T) {
 
 	str := "hello, world!"
 
-	stream, error := odb.NewWriteStream(int64(len(str)), ObjectBlob)
+	writeStream, error := odb.NewWriteStream(int64(len(str)), ObjectBlob)
 	checkFatal(t, error)
-	n, error := io.WriteString(stream, str)
+	n, error := io.WriteString(writeStream, str)
 	checkFatal(t, error)
 	if n != len(str) {
 		t.Fatalf("Bad write length %v != %v", n, len(str))
 	}
 
-	error = stream.Close()
+	error = writeStream.Close()
 	checkFatal(t, error)
 
 	expectedId, error := NewOid("30f51a3fba5274d53522d0f19748456974647b4f")
 	checkFatal(t, error)
-	if stream.Id.Cmp(expectedId) != 0 {
+	if writeStream.Id.Cmp(expectedId) != 0 {
 		t.Fatal("Wrong data written")
 	}
+
+	readStream, error := odb.NewReadStream(&writeStream.Id)
+	checkFatal(t, error)
+	data, error := ioutil.ReadAll(readStream)
+	if str != string(data) {
+		t.Fatalf("Wrong data read %v != %v", str, string(data))
+	}
 }
 
 func TestOdbHash(t *testing.T) {
@@ -82,14 +105,16 @@ committer John Doe <[email protected]> 1390682018 +0000
 
 Initial commit.`
 
-	oid, error := odb.Hash([]byte(str), ObjectCommit)
-	checkFatal(t, error)
+	for _, data := range [][]byte{[]byte(str), doublePointerBytes()} {
+		oid, error := odb.Hash(data, ObjectCommit)
+		checkFatal(t, error)
 
-	coid, error := odb.Write([]byte(str), ObjectCommit)
-	checkFatal(t, error)
+		coid, error := odb.Write(data, ObjectCommit)
+		checkFatal(t, error)
 
-	if oid.Cmp(coid) != 0 {
-		t.Fatal("Hash and write Oids are different")
+		if oid.Cmp(coid) != 0 {
+			t.Fatal("Hash and write Oids are different")
+		}
 	}
 }
 
diff --git a/packbuilder.go b/packbuilder.go
index 0e04bbf..576e5ca 100644
--- a/packbuilder.go
+++ b/packbuilder.go
@@ -85,6 +85,19 @@ func (pb *Packbuilder) InsertTree(id *Oid) error {
 	return nil
 }
 
+func (pb *Packbuilder) InsertWalk(walk *RevWalk) error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_packbuilder_insert_walk(pb.ptr, walk.ptr)
+	runtime.KeepAlive(pb)
+	runtime.KeepAlive(walk)
+	if ret != 0 {
+		return MakeGitError(ret)
+	}
+	return nil
+}
+
 func (pb *Packbuilder) ObjectCount() uint32 {
 	ret := uint32(C.git_packbuilder_object_count(pb.ptr))
 	runtime.KeepAlive(pb)
diff --git a/patch.go b/patch.go
index 7e6f71d..6a16b5f 100644
--- a/patch.go
+++ b/patch.go
@@ -51,7 +51,7 @@ func (patch *Patch) String() (string, error) {
 	if ecode < 0 {
 		return "", MakeGitError(ecode)
 	}
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	return C.GoString(buf.ptr), nil
 }
diff --git a/rebase.go b/rebase.go
index 5206fca..d29e183 100644
--- a/rebase.go
+++ b/rebase.go
@@ -6,6 +6,7 @@ package git
 import "C"
 import (
 	"errors"
+	"fmt"
 	"runtime"
 	"unsafe"
 )
@@ -16,6 +17,8 @@ type RebaseOperationType uint
 const (
 	// RebaseOperationPick The given commit is to be cherry-picked.  The client should commit the changes and continue if there are no conflicts.
 	RebaseOperationPick RebaseOperationType = C.GIT_REBASE_OPERATION_PICK
+	// RebaseOperationReword The given commit is to be cherry-picked, but the client should prompt the user to provide an updated commit message.
+	RebaseOperationReword RebaseOperationType = C.GIT_REBASE_OPERATION_REWORD
 	// RebaseOperationEdit The given commit is to be cherry-picked, but the client should stop to allow the user to edit the changes before committing them.
 	RebaseOperationEdit RebaseOperationType = C.GIT_REBASE_OPERATION_EDIT
 	// RebaseOperationSquash The given commit is to be squashed into the previous commit.  The commit message will be merged with the previous message.
@@ -26,6 +29,24 @@ const (
 	RebaseOperationExec RebaseOperationType = C.GIT_REBASE_OPERATION_EXEC
 )
 
+func (t RebaseOperationType) String() string {
+	switch t {
+	case RebaseOperationPick:
+		return "pick"
+	case RebaseOperationReword:
+		return "reword"
+	case RebaseOperationEdit:
+		return "edit"
+	case RebaseOperationSquash:
+		return "squash"
+	case RebaseOperationFixup:
+		return "fixup"
+	case RebaseOperationExec:
+		return "exec"
+	}
+	return fmt.Sprintf("RebaseOperationType(%d)", t)
+}
+
 // Special value indicating that there is no currently active operation
 var RebaseNoOperation uint = ^uint(0)
 
diff --git a/reference.go b/reference.go
index e10c9b2..b5f5e47 100644
--- a/reference.go
+++ b/reference.go
@@ -284,7 +284,7 @@ func (v *Reference) Peel(t ObjectType) (*Object, error) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	err := C.git_reference_peel(&cobj, v.ptr, C.git_otype(t))
+	err := C.git_reference_peel(&cobj, v.ptr, C.git_object_t(t))
 	runtime.KeepAlive(v)
 	if err < 0 {
 		return nil, MakeGitError(err)
@@ -301,7 +301,7 @@ func (v *Reference) Owner() *Repository {
 	}
 }
 
-// Cmp compares both references, retursn 0 on equality, otherwise a
+// Cmp compares v to ref2. It returns 0 on equality, otherwise a
 // stable sorting.
 func (v *Reference) Cmp(ref2 *Reference) int {
 	ret := int(C.git_reference_cmp(v.ptr, ref2.ptr))
@@ -310,13 +310,14 @@ func (v *Reference) Cmp(ref2 *Reference) int {
 	return ret
 }
 
-// Shorthand ret :=s a "human-readable" short reference name
+// Shorthand returns a "human-readable" short reference name.
 func (v *Reference) Shorthand() string {
 	ret := C.GoString(C.git_reference_shorthand(v.ptr))
 	runtime.KeepAlive(v)
 	return ret
 }
 
+// Name returns the full name of v.
 func (v *Reference) Name() string {
 	ret := C.GoString(C.git_reference_name(v.ptr))
 	runtime.KeepAlive(v)
@@ -455,10 +456,12 @@ func (v *ReferenceIterator) Next() (*Reference, error) {
 }
 
 func newReferenceIteratorFromC(ptr *C.git_reference_iterator, r *Repository) *ReferenceIterator {
-	return &ReferenceIterator{
+	iter := &ReferenceIterator{
 		ptr:  ptr,
 		repo: r,
 	}
+	runtime.SetFinalizer(iter, (*ReferenceIterator).Free)
+	return iter
 }
 
 // Free the reference iterator
diff --git a/remote.go b/remote.go
index b4b1dd7..43ffd33 100644
--- a/remote.go
+++ b/remote.go
@@ -1,9 +1,11 @@
 package git
 
 /*
-#include <git2.h>
 #include <string.h>
 
+#include <git2.h>
+#include <git2/sys/cred.h>
+
 extern void _go_git_setup_callbacks(git_remote_callbacks *callbacks);
 
 */
diff --git a/repository.go b/repository.go
index d8de97a..07b2605 100644
--- a/repository.go
+++ b/repository.go
@@ -3,6 +3,8 @@ package git
 /*
 #include <git2.h>
 #include <git2/sys/repository.h>
+#include <git2/sys/commit.h>
+#include <string.h>
 */
 import "C"
 import (
@@ -174,7 +176,7 @@ func (v *Repository) lookupType(id *Oid, t ObjectType) (*Object, error) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_object_lookup(&ptr, v.ptr, id.toC(), C.git_otype(t))
+	ret := C.git_object_lookup(&ptr, v.ptr, id.toC(), C.git_object_t(t))
 	runtime.KeepAlive(id)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
@@ -192,6 +194,7 @@ func (v *Repository) LookupTree(id *Oid) (*Tree, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer obj.Free()
 
 	return obj.AsTree()
 }
@@ -201,6 +204,7 @@ func (v *Repository) LookupCommit(id *Oid) (*Commit, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer obj.Free()
 
 	return obj.AsCommit()
 }
@@ -210,6 +214,7 @@ func (v *Repository) LookupBlob(id *Oid) (*Blob, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer obj.Free()
 
 	return obj.AsBlob()
 }
@@ -219,6 +224,7 @@ func (v *Repository) LookupTag(id *Oid) (*Tag, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer obj.Free()
 
 	return obj.AsTag()
 }
@@ -389,6 +395,74 @@ func (v *Repository) CreateCommit(
 	return oid, nil
 }
 
+func (v *Repository) CreateCommitFromIds(
+	refname string, author, committer *Signature,
+	message string, tree *Oid, parents ...*Oid) (*Oid, error) {
+
+	oid := new(Oid)
+
+	var cref *C.char
+	if refname == "" {
+		cref = nil
+	} else {
+		cref = C.CString(refname)
+		defer C.free(unsafe.Pointer(cref))
+	}
+
+	cmsg := C.CString(message)
+	defer C.free(unsafe.Pointer(cmsg))
+
+	var parentsarg **C.git_oid = nil
+
+	nparents := len(parents)
+	if nparents > 0 {
+		// All this awful pointer arithmetic is needed to avoid passing a Go
+		// pointer to Go pointer into C. Other methods (like CreateCommits) are
+		// fine without this workaround because they are just passing Go pointers
+		// to C pointers, but arrays-of-pointers-to-git_oid are a bit special since
+		// both the array and the objects are allocated from Go.
+		var emptyOidPtr *C.git_oid
+		sizeofOidPtr := unsafe.Sizeof(emptyOidPtr)
+		parentsarg = (**C.git_oid)(C.calloc(C.size_t(uintptr(nparents)), C.size_t(sizeofOidPtr)))
+		defer C.free(unsafe.Pointer(parentsarg))
+		parentsptr := uintptr(unsafe.Pointer(parentsarg))
+		for _, v := range parents {
+			*(**C.git_oid)(unsafe.Pointer(parentsptr)) = v.toC()
+			parentsptr += sizeofOidPtr
+		}
+	}
+
+	authorSig, err := author.toC()
+	if err != nil {
+		return nil, err
+	}
+	defer C.git_signature_free(authorSig)
+
+	committerSig, err := committer.toC()
+	if err != nil {
+		return nil, err
+	}
+	defer C.git_signature_free(committerSig)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_commit_create_from_ids(
+		oid.toC(), v.ptr, cref,
+		authorSig, committerSig,
+		nil, cmsg, tree.toC(), C.size_t(nparents), parentsarg)
+
+	runtime.KeepAlive(v)
+	runtime.KeepAlive(oid)
+	runtime.KeepAlive(tree)
+	runtime.KeepAlive(parents)
+	if ret < 0 {
+		return nil, MakeGitError(ret)
+	}
+
+	return oid, nil
+}
+
 func (v *Odb) Free() {
 	runtime.SetFinalizer(v, nil)
 	C.git_odb_free(v.ptr)
diff --git a/repository_test.go b/repository_test.go
new file mode 100644
index 0000000..1950c69
--- /dev/null
+++ b/repository_test.go
@@ -0,0 +1,42 @@
+package git
+
+import (
+	"testing"
+	"time"
+)
+
+func TestCreateCommitFromIds(t *testing.T) {
+	t.Parallel()
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	loc, err := time.LoadLocation("Europe/Berlin")
+	checkFatal(t, err)
+	sig := &Signature{
+		Name:  "Rand Om Hacker",
+		Email: "[email protected]",
+		When:  time.Date(2013, 03, 06, 14, 30, 0, 0, loc),
+	}
+
+	idx, err := repo.Index()
+	checkFatal(t, err)
+	err = idx.AddByPath("README")
+	checkFatal(t, err)
+	err = idx.Write()
+	checkFatal(t, err)
+	treeId, err := idx.WriteTree()
+	checkFatal(t, err)
+
+	message := "This is a commit\n"
+	tree, err := repo.LookupTree(treeId)
+	checkFatal(t, err)
+	expectedCommitId, err := repo.CreateCommit("HEAD", sig, sig, message, tree)
+	checkFatal(t, err)
+
+	commitId, err := repo.CreateCommitFromIds("", sig, sig, message, treeId)
+	checkFatal(t, err)
+
+	if !expectedCommitId.Equal(commitId) {
+		t.Errorf("mismatched commit ids, expected %v, got %v", expectedCommitId.String(), commitId.String())
+	}
+}
diff --git a/reset_test.go b/reset_test.go
index 45777e4..89ebc49 100644
--- a/reset_test.go
+++ b/reset_test.go
@@ -8,6 +8,8 @@ import (
 func TestResetToCommit(t *testing.T) {
 	t.Parallel()
 	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
 	seedTestRepo(t, repo)
 	// create commit to reset to
 	commitId, _ := updateReadme(t, repo, "testing reset")
diff --git a/revert.go b/revert.go
new file mode 100644
index 0000000..e745f11
--- /dev/null
+++ b/revert.go
@@ -0,0 +1,101 @@
+package git
+
+/*
+#include <git2.h>
+*/
+import "C"
+import (
+	"runtime"
+)
+
+// RevertOptions contains options for performing a revert
+type RevertOptions struct {
+	Mainline     uint
+	MergeOpts    MergeOptions
+	CheckoutOpts CheckoutOpts
+}
+
+func (opts *RevertOptions) toC() *C.git_revert_options {
+	return &C.git_revert_options{
+		version:       C.GIT_REVERT_OPTIONS_VERSION,
+		mainline:      C.uint(opts.Mainline),
+		merge_opts:    *opts.MergeOpts.toC(),
+		checkout_opts: *opts.CheckoutOpts.toC(),
+	}
+}
+
+func revertOptionsFromC(opts *C.git_revert_options) RevertOptions {
+	return RevertOptions{
+		Mainline:     uint(opts.mainline),
+		MergeOpts:    mergeOptionsFromC(&opts.merge_opts),
+		CheckoutOpts: checkoutOptionsFromC(&opts.checkout_opts),
+	}
+}
+
+func freeRevertOptions(opts *C.git_revert_options) {
+	freeCheckoutOpts(&opts.checkout_opts)
+}
+
+// DefaultRevertOptions initialises a RevertOptions struct with default values
+func DefaultRevertOptions() (RevertOptions, error) {
+	opts := C.git_revert_options{}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ecode := C.git_revert_init_options(&opts, C.GIT_REVERT_OPTIONS_VERSION)
+	if ecode < 0 {
+		return RevertOptions{}, MakeGitError(ecode)
+	}
+
+	defer freeRevertOptions(&opts)
+	return revertOptionsFromC(&opts), nil
+}
+
+// Revert the provided commit leaving the index updated with the results of the revert
+func (r *Repository) Revert(commit *Commit, revertOptions *RevertOptions) error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var cOpts *C.git_revert_options
+
+	if revertOptions != nil {
+		cOpts = revertOptions.toC()
+		defer freeRevertOptions(cOpts)
+	}
+
+	ecode := C.git_revert(r.ptr, commit.cast_ptr, cOpts)
+	runtime.KeepAlive(r)
+	runtime.KeepAlive(commit)
+
+	if ecode < 0 {
+		return MakeGitError(ecode)
+	}
+
+	return nil
+}
+
+// RevertCommit reverts the provided commit against "ourCommit"
+// The returned index contains the result of the revert and should be freed
+func (r *Repository) RevertCommit(revertCommit *Commit, ourCommit *Commit, mainline uint, mergeOptions *MergeOptions) (*Index, error) {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var cOpts *C.git_merge_options
+
+	if mergeOptions != nil {
+		cOpts = mergeOptions.toC()
+	}
+
+	var index *C.git_index
+
+	ecode := C.git_revert_commit(&index, r.ptr, revertCommit.cast_ptr, ourCommit.cast_ptr, C.uint(mainline), cOpts)
+	runtime.KeepAlive(revertCommit)
+	runtime.KeepAlive(ourCommit)
+
+	if ecode < 0 {
+		return nil, MakeGitError(ecode)
+	}
+
+	return newIndexFromC(index, r), nil
+}
diff --git a/revert_test.go b/revert_test.go
new file mode 100644
index 0000000..fcf8e43
--- /dev/null
+++ b/revert_test.go
@@ -0,0 +1,76 @@
+package git
+
+import (
+	"testing"
+)
+
+const (
+	expectedRevertedReadmeContents = "foo\n"
+)
+
+func TestRevert(t *testing.T) {
+	t.Parallel()
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	seedTestRepo(t, repo)
+	commitID, _ := updateReadme(t, repo, content)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	revertOptions, err := DefaultRevertOptions()
+	checkFatal(t, err)
+
+	err = repo.Revert(commit, &revertOptions)
+	checkFatal(t, err)
+
+	actualReadmeContents := readReadme(t, repo)
+
+	if actualReadmeContents != expectedRevertedReadmeContents {
+		t.Fatalf(`README has incorrect contents after revert. Expected: "%v", Actual: "%v"`,
+			expectedRevertedReadmeContents, actualReadmeContents)
+	}
+
+	state := repo.State()
+	if state != RepositoryStateRevert {
+		t.Fatalf("Incorrect repository state. Expected: %v, Actual: %v", RepositoryStateRevert, state)
+	}
+
+	err = repo.StateCleanup()
+	checkFatal(t, err)
+
+	state = repo.State()
+	if state != RepositoryStateNone {
+		t.Fatalf("Incorrect repository state. Expected: %v, Actual: %v", RepositoryStateNone, state)
+	}
+}
+
+func TestRevertCommit(t *testing.T) {
+	t.Parallel()
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	seedTestRepo(t, repo)
+	commitID, _ := updateReadme(t, repo, content)
+
+	commit, err := repo.LookupCommit(commitID)
+	checkFatal(t, err)
+
+	revertOptions, err := DefaultRevertOptions()
+	checkFatal(t, err)
+
+	index, err := repo.RevertCommit(commit, commit, 0, &revertOptions.MergeOpts)
+	checkFatal(t, err)
+	defer index.Free()
+
+	err = repo.CheckoutIndex(index, &revertOptions.CheckoutOpts)
+	checkFatal(t, err)
+
+	actualReadmeContents := readReadme(t, repo)
+
+	if actualReadmeContents != expectedRevertedReadmeContents {
+		t.Fatalf(`README has incorrect contents after revert. Expected: "%v", Actual: "%v"`,
+			expectedRevertedReadmeContents, actualReadmeContents)
+	}
+}
diff --git a/script/build-libgit2-dynamic.sh b/script/build-libgit2-dynamic.sh
new file mode 100755
index 0000000..af037f3
--- /dev/null
+++ b/script/build-libgit2-dynamic.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -e
+
+exec "$(dirname "$0")/build-libgit2.sh" --dynamic
diff --git a/script/build-libgit2-static.sh b/script/build-libgit2-static.sh
index 5723721..1d28898 100755
--- a/script/build-libgit2-static.sh
+++ b/script/build-libgit2-static.sh
@@ -1,19 +1,5 @@
 #!/bin/sh
 
-set -ex
+set -e
 
-VENDORED_PATH=vendor/libgit2
-
-cd $VENDORED_PATH &&
-mkdir -p install/lib &&
-mkdir -p build &&
-cd build &&
-cmake -DTHREADSAFE=ON \
-      -DBUILD_CLAR=OFF \
-      -DBUILD_SHARED_LIBS=OFF \
-      -DCMAKE_C_FLAGS=-fPIC \
-      -DCMAKE_BUILD_TYPE="RelWithDebInfo" \
-      -DCMAKE_INSTALL_PREFIX=../install \
-      .. &&
-
-cmake --build .
+exec "$(dirname "$0")/build-libgit2.sh" --static
diff --git a/script/build-libgit2.sh b/script/build-libgit2.sh
new file mode 100755
index 0000000..acbc84a
--- /dev/null
+++ b/script/build-libgit2.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+# Since CMake cannot build the static and dynamic libraries in the same
+# directory, this script helps build both static and dynamic versions of it and
+# have the common flags in one place instead of split between two places.
+
+set -e
+
+if [ "$#" -eq "0" ]; then
+	echo "Usage: $0 <--dynamic|--static>">&2
+	exit 1
+fi
+
+ROOT="$(cd "$(dirname "$0")/.." && echo "${PWD}")"
+VENDORED_PATH="${ROOT}/vendor/libgit2"
+
+case "$1" in
+	--static)
+		BUILD_PATH="${ROOT}/static-build"
+		BUILD_SHARED_LIBS=OFF
+		;;
+
+	--dynamic)
+		BUILD_PATH="${ROOT}/dynamic-build"
+		BUILD_SHARED_LIBS=ON
+		;;
+
+	*)
+		echo "Usage: $0 <--dynamic|--static>">&2
+		exit 1
+		;;
+esac
+
+mkdir -p "${BUILD_PATH}/build" "${BUILD_PATH}/install/lib"
+
+cd "${BUILD_PATH}/build" &&
+cmake -DTHREADSAFE=ON \
+      -DBUILD_CLAR=OFF \
+      -DBUILD_SHARED_LIBS"=${BUILD_SHARED_LIBS}" \
+      -DREGEX_BACKEND=builtin \
+      -DCMAKE_C_FLAGS=-fPIC \
+      -DCMAKE_BUILD_TYPE="RelWithDebInfo" \
+      -DCMAKE_INSTALL_PREFIX="${BUILD_PATH}/install" \
+      "${VENDORED_PATH}" &&
+
+exec cmake --build . --target install
diff --git a/settings.go b/settings.go
index c7f1850..b9bc216 100644
--- a/settings.go
+++ b/settings.go
@@ -31,7 +31,7 @@ import (
 
 func SearchPath(level ConfigLevel) (string, error) {
 	var buf C.git_buf
-	defer C.git_buf_free(&buf)
+	defer C.git_buf_dispose(&buf)
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
diff --git a/signature.go b/signature.go
index 16964d2..220fe57 100644
--- a/signature.go
+++ b/signature.go
@@ -26,7 +26,7 @@ func newSignatureFromC(sig *C.git_signature) *Signature {
 	}
 }
 
-// the offset in mintes, which is what git wants
+// Offset returns the time zone offset of v.When in minutes, which is what git wants.
 func (v *Signature) Offset() int {
 	_, offset := v.When.Zone()
 	return offset / 60
diff --git a/stash.go b/stash.go
index 8743da8..6624bce 100644
--- a/stash.go
+++ b/stash.go
@@ -171,7 +171,7 @@ func (opts *StashApplyOptions) toC() (
 
 		optsC = &C.git_stash_apply_options{
 			version: C.GIT_STASH_APPLY_OPTIONS_VERSION,
-			flags:   C.git_stash_apply_flags(opts.Flags),
+			flags:   C.uint32_t(opts.Flags),
 		}
 		populateCheckoutOpts(&optsC.checkout_options, &opts.CheckoutOptions)
 		if opts.ProgressCallback != nil {
diff --git a/tag.go b/tag.go
index 4debdb7..1bea2b7 100644
--- a/tag.go
+++ b/tag.go
@@ -21,26 +21,26 @@ func (t *Tag) AsObject() *Object {
 	return &t.Object
 }
 
-func (t Tag) Message() string {
+func (t *Tag) Message() string {
 	ret := C.GoString(C.git_tag_message(t.cast_ptr))
 	runtime.KeepAlive(t)
 	return ret
 }
 
-func (t Tag) Name() string {
+func (t *Tag) Name() string {
 	ret := C.GoString(C.git_tag_name(t.cast_ptr))
 	runtime.KeepAlive(t)
 	return ret
 }
 
-func (t Tag) Tagger() *Signature {
+func (t *Tag) Tagger() *Signature {
 	cast_ptr := C.git_tag_tagger(t.cast_ptr)
 	ret := newSignatureFromC(cast_ptr)
 	runtime.KeepAlive(t)
 	return ret
 }
 
-func (t Tag) Target() *Object {
+func (t *Tag) Target() *Object {
 	var ptr *C.git_object
 	ret := C.git_tag_target(&ptr, t.cast_ptr)
 	runtime.KeepAlive(t)
@@ -51,13 +51,13 @@ func (t Tag) Target() *Object {
 	return allocObject(ptr, t.repo)
 }
 
-func (t Tag) TargetId() *Oid {
+func (t *Tag) TargetId() *Oid {
 	ret := newOidFromC(C.git_tag_target_id(t.cast_ptr))
 	runtime.KeepAlive(t)
 	return ret
 }
 
-func (t Tag) TargetType() ObjectType {
+func (t *Tag) TargetType() ObjectType {
 	ret := ObjectType(C.git_tag_target_type(t.cast_ptr))
 	runtime.KeepAlive(t)
 	return ret
diff --git a/tree.go b/tree.go
index ee14ec5..b309193 100644
--- a/tree.go
+++ b/tree.go
@@ -47,17 +47,18 @@ func newTreeEntry(entry *C.git_tree_entry) *TreeEntry {
 	}
 }
 
-func (t Tree) EntryByName(filename string) *TreeEntry {
+func (t *Tree) EntryByName(filename string) *TreeEntry {
 	cname := C.CString(filename)
 	defer C.free(unsafe.Pointer(cname))
 
 	entry := C.git_tree_entry_byname(t.cast_ptr, cname)
-	runtime.KeepAlive(t)
 	if entry == nil {
 		return nil
 	}
 
-	return newTreeEntry(entry)
+	goEntry := newTreeEntry(entry)
+	runtime.KeepAlive(t)
+	return goEntry
 }
 
 // EntryById performs a lookup for a tree entry with the given SHA value.
@@ -66,23 +67,24 @@ func (t Tree) EntryByName(filename string) *TreeEntry {
 // free it, but you must not use it after the Tree is freed.
 //
 // Warning: this must examine every entry in the tree, so it is not fast.
-func (t Tree) EntryById(id *Oid) *TreeEntry {
+func (t *Tree) EntryById(id *Oid) *TreeEntry {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
 	entry := C.git_tree_entry_byid(t.cast_ptr, id.toC())
-	runtime.KeepAlive(t)
 	runtime.KeepAlive(id)
 	if entry == nil {
 		return nil
 	}
 
-	return newTreeEntry(entry)
+	goEntry := newTreeEntry(entry)
+	runtime.KeepAlive(t)
+	return goEntry
 }
 
 // EntryByPath looks up an entry by its full path, recursing into
 // deeper trees if necessary (i.e. if there are slashes in the path)
-func (t Tree) EntryByPath(path string) (*TreeEntry, error) {
+func (t *Tree) EntryByPath(path string) (*TreeEntry, error) {
 	cpath := C.CString(path)
 	defer C.free(unsafe.Pointer(cpath))
 	var entry *C.git_tree_entry
@@ -100,17 +102,18 @@ func (t Tree) EntryByPath(path string) (*TreeEntry, error) {
 	return newTreeEntry(entry), nil
 }
 
-func (t Tree) EntryByIndex(index uint64) *TreeEntry {
+func (t *Tree) EntryByIndex(index uint64) *TreeEntry {
 	entry := C.git_tree_entry_byindex(t.cast_ptr, C.size_t(index))
-	runtime.KeepAlive(t)
 	if entry == nil {
 		return nil
 	}
 
-	return newTreeEntry(entry)
+	goEntry := newTreeEntry(entry)
+	runtime.KeepAlive(t)
+	return goEntry
 }
 
-func (t Tree) EntryCount() uint64 {
+func (t *Tree) EntryCount() uint64 {
 	num := C.git_tree_entrycount(t.cast_ptr)
 	runtime.KeepAlive(t)
 	return uint64(num)
@@ -119,9 +122,8 @@ func (t Tree) EntryCount() uint64 {
 type TreeWalkCallback func(string, *TreeEntry) int
 
 //export CallbackGitTreeWalk
-func CallbackGitTreeWalk(_root *C.char, _entry unsafe.Pointer, ptr unsafe.Pointer) C.int {
+func CallbackGitTreeWalk(_root *C.char, entry *C.git_tree_entry, ptr unsafe.Pointer) C.int {
 	root := C.GoString(_root)
-	entry := (*C.git_tree_entry)(_entry)
 
 	if callback, ok := pointerHandles.Get(ptr).(TreeWalkCallback); ok {
 		return C.int(callback(root, newTreeEntry(entry)))
@@ -130,7 +132,7 @@ func CallbackGitTreeWalk(_root *C.char, _entry unsafe.Pointer, ptr unsafe.Pointe
 	}
 }
 
-func (t Tree) Walk(callback TreeWalkCallback) error {
+func (t *Tree) Walk(callback TreeWalkCallback) error {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
diff --git a/vendor/libgit2 b/vendor/libgit2
-Subproject f1323d9c161aeeada190fd9615a8b5a9fb8a7f3
+Subproject ee3307a183e39d602b25fa94831c6fc09e7c1b6
diff --git a/wrapper.c b/wrapper.c
index 11c2f32..3656773 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -2,6 +2,7 @@
 #include <git2.h>
 #include <git2/sys/odb_backend.h>
 #include <git2/sys/refdb_backend.h>
+#include <git2/sys/cred.h>
 
 typedef int (*gogit_submodule_cbk)(git_submodule *sm, const char *name, void *payload);
 
@@ -180,4 +181,8 @@ void _go_git_writestream_free(git_writestream *stream)
 	stream->free(stream);
 }
 
+git_credtype_t _go_git_cred_credtype(git_cred *cred) {
+	return cred->credtype;
+}
+
 /* EOF */