Initial commit

10 files changed, 624 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..46a7407
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2013 The git2go contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..94aedea
--- /dev/null
+++ b/README.md
@@ -0,0 +1,16 @@
+git2go
+======
+
+Go bindings for [libgit2](http://libgit2.github.com/). Pre-release, things may or may not work. Operator get me Beijing-jing-jing-jing!
+
+License
+-------
+
+M to the I to the T.
+
+Authors
+-------
+
+- Carlos Martín (@cmn)
+- Vicent Martí (@vmg)
+
diff --git a/blob.go b/blob.go
new file mode 100644
index 0000000..91064b1
--- /dev/null
+++ b/blob.go
@@ -0,0 +1,26 @@
+package git
+
+/*
+#cgo pkg-config: libgit2
+#include <git2.h>
+#include <git2/errors.h>
+*/
+import "C"
+import (
+	"unsafe"
+)
+
+type Blob struct {
+	ptr *C.git_object
+}
+
+func freeBlob(blob *Blob) {
+	C.git_object_free(blob.ptr)
+}
+
+func (v *Blob) Contents() []byte {
+	size := C.int(C.git_blob_rawsize(v.ptr))
+	buffer := unsafe.Pointer(C.git_blob_rawcontent(v.ptr))
+	return C.GoBytes(buffer, size)
+}
+
diff --git a/commit.go b/commit.go
new file mode 100644
index 0000000..bba02e8
--- /dev/null
+++ b/commit.go
@@ -0,0 +1,52 @@
+package git
+
+/*
+#include <git2.h>
+#include <git2/errors.h>
+
+extern int _go_git_treewalk(git_tree *tree, git_treewalk_mode mode, void *ptr);
+*/
+import "C"
+
+import (
+)
+
+// Commit
+type Commit struct {
+	ptr *C.git_commit
+}
+
+func (c *Commit) Id() *Oid {
+	return newOidFromC(C.git_commit_id(c.ptr))
+}
+
+func (c *Commit) Message() string {
+	return C.GoString(C.git_commit_message(c.ptr))
+}
+
+func (c *Commit) Tree() (*Tree, error) {
+	tree := new(Tree)
+
+	err := C.git_commit_tree(&tree.ptr, c.ptr)
+	if err < 0 {
+		return nil, LastError()
+	}
+	return tree, nil
+}
+
+func (c *Commit) TreeId() *Oid {
+	return newOidFromC(C.git_commit_tree_id(c.ptr))
+}
+
+/* TODO */
+/*
+func (c *Commit) Author() *Signature {
+	ptr := C.git_commit_author(c.ptr)
+	return &Signature{ptr}
+}
+
+func (c *Commit) Committer() *Signature {
+	ptr := C.git_commit_committer(c.ptr)
+	return &Signature{ptr}
+}
+*/
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..ec8b8d0
--- /dev/null
+++ b/config.go
@@ -0,0 +1,69 @@
+package git
+
+/*
+#cgo pkg-config: libgit2
+#include <git2.h>
+#include <git2/errors.h>
+*/
+import "C"
+import (
+	"unsafe"
+)
+
+type Config struct {
+	ptr *C.git_config
+}
+
+func (c *Config) LookupInt32(name string) (v int32, err error) {
+	var out C.int32_t
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	ret := C.git_config_get_int32(&out, c.ptr, cname)
+	if ret < 0 {
+		return 0, LastError()
+	}
+
+	return int32(out), nil
+}
+
+func (c *Config) LookupInt64(name string) (v int64, err error) {
+	var out C.int64_t
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	ret := C.git_config_get_int64(&out, c.ptr, cname)
+	if ret < 0 {
+		return 0, LastError()
+	}
+
+	return int64(out), nil
+}
+
+func (c *Config) LookupString(name string) (v string, err error) {
+	var ptr *C.char
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	ret := C.git_config_get_string(&ptr, c.ptr, cname)
+	if ret < 0 {
+		return "", LastError()
+	}
+
+	return C.GoString(ptr), nil
+}
+
+func (c *Config) Set(name, value string) (err error) {
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+
+	cvalue := C.CString(value)
+	defer C.free(unsafe.Pointer(cvalue))
+
+	ret := C.git_config_set_string(c.ptr, cname, cvalue)
+	if ret < 0 {
+		return LastError()
+	}
+
+	return nil
+}
diff --git a/git.go b/git.go
new file mode 100644
index 0000000..84716e3
--- /dev/null
+++ b/git.go
@@ -0,0 +1,92 @@
+package git
+
+/*
+#cgo pkg-config: libgit2
+#include <git2.h>
+#include <git2/errors.h>
+*/
+import "C"
+import (
+	"unsafe"
+)
+
+const (
+	ITEROVER  = C.GIT_ITEROVER
+	EEXISTS   = C.GIT_EEXISTS
+	ENOTFOUND = C.GIT_ENOTFOUND
+)
+
+func init() {
+	C.git_threads_init()
+}
+
+// Oid
+type Oid struct {
+	bytes [20]byte
+}
+
+func newOidFromC(coid *C.git_oid) *Oid {
+	oid := new(Oid)
+	copy(oid.bytes[0:20], C.GoBytes(unsafe.Pointer(coid), 20))
+	return oid
+}
+
+func NewOid(b []byte) *Oid {
+	oid := new(Oid)
+	copy(oid.bytes[0:20], b[0:20])
+	return oid
+}
+
+func (oid *Oid) toC() *C.git_oid {
+	return (*C.git_oid)(unsafe.Pointer(&oid.bytes))
+}
+
+func NewOidFromString(s string) (*Oid, error) {
+	o := new(Oid)
+	cs := C.CString(s)
+	defer C.free(unsafe.Pointer(cs))
+
+	if C.git_oid_fromstr(o.toC(), cs) < 0 {
+		return nil, LastError()
+	}
+
+	return o, nil
+}
+
+func (oid *Oid) String() string {
+	buf := make([]byte, 40)
+	C.git_oid_fmt((*C.char)(unsafe.Pointer(&buf[0])), oid.toC())
+	return string(buf)
+}
+
+func (oid *Oid) Bytes() []byte {
+	return oid.bytes[0:]
+}
+
+type GitError struct {
+	Message string
+	Code int
+}
+
+func (e GitError) Error() string{
+	return e.Message
+}
+
+func LastError() error {
+	err := C.giterr_last()
+	return &GitError{C.GoString(err.message), int(err.klass)}
+}
+
+func cbool(b bool) C.int {
+	if (b) {
+		return C.int(1)
+	}
+	return C.int(0)
+}
+
+func ucbool(b bool) C.uint {
+	if (b) {
+		return C.uint(1)
+	}
+	return C.uint(0)
+}
diff --git a/odb.go b/odb.go
new file mode 100644
index 0000000..5688080
--- /dev/null
+++ b/odb.go
@@ -0,0 +1,71 @@
+package git
+
+/*
+#cgo pkg-config: libgit2
+#include <git2.h>
+#include <git2/errors.h>
+*/
+import "C"
+import (
+	"unsafe"
+	"reflect"
+	"runtime"
+)
+
+var (
+	OBJ_ANY = C.GIT_OBJ_ANY
+	OBJ_BAD = C.GIT_OBJ_BAD
+	OBJ_COMMIT = C.GIT_OBJ_COMMIT
+	OBJ_TREE = C.GIT_OBJ_TREE
+	OBJ_BLOB = C.GIT_OBJ_BLOB
+	OBJ_TAG = C.GIT_OBJ_TAG
+)
+
+type Odb struct {
+	ptr *C.git_odb
+}
+
+func (v *Odb) Exists(oid *Oid) bool {
+	ret := C.git_odb_exists(v.ptr, oid.toC())
+	return ret != 0
+}
+
+func (v *Odb) Write(data []byte, otype int) (oid *Oid, err error) {
+	oid = new(Oid)
+	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&data))
+	ret := C.git_odb_write(oid.toC(), v.ptr, unsafe.Pointer(hdr.Data), C.size_t(hdr.Len), C.git_otype(otype))
+
+	if ret < 0 {
+		err = LastError()
+	}
+
+	return
+}
+
+func (v *Odb) Read(oid *Oid) (obj *OdbObject, err error) {
+	obj = new(OdbObject)
+	ret := C.git_odb_read(&obj.ptr, v.ptr, oid.toC())
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	runtime.SetFinalizer(obj, freeOdbObject)
+	return
+}
+
+type OdbObject struct {
+	ptr *C.git_odb_object
+}
+
+func freeOdbObject(obj *OdbObject) {
+	C.git_odb_object_free(obj.ptr)
+}
+
+func (v *OdbObject) Type() int {
+	return int(C.git_odb_object_type(v.ptr))
+}
+
+func (v *OdbObject) Size() int64 {
+	return int64(C.git_odb_object_size(v.ptr))
+}
+
diff --git a/repository.go b/repository.go
new file mode 100644
index 0000000..3b845e7
--- /dev/null
+++ b/repository.go
@@ -0,0 +1,141 @@
+package git
+
+/*
+#cgo pkg-config: libgit2
+#include <git2.h>
+#include <git2/errors.h>
+*/
+import "C"
+import (
+	"unsafe"
+	"runtime"
+)
+
+// Repository
+type Repository struct {
+	ptr *C.git_repository
+}
+
+func Open(path string) (*Repository, error) {
+	repo := new(Repository)
+
+	cpath := C.CString(path)
+	defer C.free(unsafe.Pointer(cpath))
+
+	ret := C.git_repository_open(&repo.ptr, cpath)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	runtime.SetFinalizer(repo, freeRepository)
+	return repo, nil
+}
+
+func Init(path string, isbare bool) (*Repository, error) {
+	repo := new(Repository)
+
+	cpath := C.CString(path)
+	defer C.free(unsafe.Pointer(cpath))
+
+	ret := C.git_repository_init(&repo.ptr, cpath, ucbool(isbare))
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	runtime.SetFinalizer(repo, freeRepository)
+	return repo, nil
+}
+
+func freeRepository(repo *Repository) {
+	C.git_repository_free(repo.ptr)
+}
+
+func (v *Repository) Config() (*Config, error) {
+	config := new(Config)
+
+	ret := C.git_repository_config(&config.ptr, v.ptr)
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return config, nil
+}
+
+func (v *Repository) LookupTree(oid *Oid) (*Tree, error) {
+	tree := new(Tree)
+	ret := C.git_tree_lookup(&tree.ptr, v.ptr, oid.toC())
+	if ret < 0 {
+		return nil, LastError()
+	}
+
+	return tree, nil
+}
+
+func (v *Repository) LookupCommit(o *Oid) (*Commit, error) {
+	commit := new(Commit)
+	ecode := C.git_commit_lookup(&commit.ptr, v.ptr, o.toC())
+	if ecode < 0 {
+		return nil, LastError()
+	}
+
+	return commit, nil
+}
+
+/* TODO 
+func (v *Repository) Commit(
+	refname string, author, committer *Signature,
+	message string, tree *Tree, parents ...*Commit) (*Oid, error) {
+
+	oid := new(Oid)
+	cref := C.CString(refname)
+	defer C.free(unsafe.Pointer(cref))
+	cmsg := C.CString(message)
+	defer C.free(unsafe.Pointer(cmsg))
+	nparents := len(parents)
+	var cparents []*C.git_commit = nil
+	var parentsarg **C.git_commit = nil
+	if nparents > 0 {
+		cparents = make([]*C.git_commit, nparents)
+		for i, v := range parents {
+			cparents[i] = v.ptr
+		}
+		parentsarg = &cparents[0]
+	}
+
+	ret := C.git_commit_create(
+		oid.toC(), v.ptr, cref,
+		author.git_signature, committer.git_signature,
+		nil, cmsg, tree.ptr, C.int(nparents), parentsarg)
+
+	if ret < GIT_SUCCESS {
+		return nil, LastError()
+	}
+
+	return oid, nil
+}
+*/
+
+func freeOdb(odb *Odb) {
+	C.git_odb_free(odb.ptr)
+}
+
+func (v *Repository) Odb() (odb *Odb, err error) {
+	odb = new(Odb)
+	if ret := C.git_repository_odb(&odb.ptr, v.ptr); ret < 0 {
+		return nil, LastError()
+	}
+
+	runtime.SetFinalizer(odb, freeOdb)
+	return
+}
+
+func (v *Repository) TreeBuilder() (*TreeBuilder, error) {
+	bld := new(TreeBuilder)
+	if ret := C.git_treebuilder_create(&bld.ptr, nil); ret < 0 {
+		return nil, LastError()
+	}
+
+	bld.repo = v
+	return bld, nil
+}
+
diff --git a/tree.go b/tree.go
new file mode 100644
index 0000000..324fc1f
--- /dev/null
+++ b/tree.go
@@ -0,0 +1,127 @@
+package git
+
+/*
+#include <git2.h>
+#include <git2/errors.h>
+
+extern int _go_git_treewalk(git_tree *tree, git_treewalk_mode mode, void *ptr);
+*/
+import "C"
+
+import (
+	"unsafe"
+)
+
+type Tree struct {
+	ptr *C.git_tree
+}
+
+type TreeEntry struct {
+	Name string
+	Oid  *Oid
+	Type int
+}
+
+func newTreeEntry(entry *C.git_tree_entry) *TreeEntry {
+	return &TreeEntry{
+		C.GoString(C.git_tree_entry_name(entry)),
+		newOidFromC(C.git_tree_entry_id(entry)),
+		int(C.git_tree_entry_type(entry)),
+	}
+}
+
+func (t *Tree) Free() {
+	C.git_tree_free(t.ptr)
+}
+
+func TreeLookup(repo *Repository, oid *Oid) (*Tree, error) {
+	tree := new(Tree)
+	err := C.git_tree_lookup(&tree.ptr, repo.ptr, oid.toC())
+	if err < 0 {
+		return nil, LastError()
+	}
+	return tree, nil
+}
+
+func (t *Tree) EntryByName(filename string) *TreeEntry {
+	cname := C.CString(filename)
+	defer C.free(unsafe.Pointer(cname))
+
+	entry := C.git_tree_entry_byname(t.ptr, cname)
+	if entry == nil {
+		return nil
+	}
+
+	return newTreeEntry(entry)
+}
+
+func (t *Tree) EntryByIndex(index uint64) *TreeEntry {
+	entry := C.git_tree_entry_byindex(t.ptr, C.size_t(index))
+	if entry == nil {
+		return nil
+	}
+
+	return newTreeEntry(entry)
+}
+
+func (t *Tree) EntryCount() uint64 {
+	num := C.git_tree_entrycount(t.ptr)
+	return uint64(num)
+}
+
+type TreeWalkCallback func(string, *TreeEntry) int
+
+//export CallbackGitTreeWalk
+func CallbackGitTreeWalk(_root unsafe.Pointer, _entry unsafe.Pointer, ptr unsafe.Pointer) C.int {
+	root := C.GoString((*C.char)(_root))
+	entry := (*C.git_tree_entry)(_entry)
+	callback := *(*TreeWalkCallback)(ptr)
+
+	return C.int(callback(root, newTreeEntry(entry)))
+}
+
+func (t *Tree) Walk(callback TreeWalkCallback) error {
+	err := C._go_git_treewalk(
+		t.ptr,
+		C.GIT_TREEWALK_PRE,
+		unsafe.Pointer(&callback),
+	)
+
+	if err < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+type TreeBuilder struct {
+	ptr *C.git_treebuilder
+	repo *Repository
+}
+
+func freeTreeBuilder(v *TreeBuilder) {
+	C.git_treebuilder_free(v.ptr)
+}
+
+func (v *TreeBuilder) Insert(filename string, id *Oid, filemode int) (error) {
+	cfilename := C.CString(filename)
+	defer C.free(unsafe.Pointer(cfilename))
+
+	err := C.git_treebuilder_insert(nil, v.ptr, cfilename, id.toC(), C.git_filemode_t(filemode))
+	if err < 0 {
+		return LastError()
+	}
+
+	return nil
+}
+
+func (v *TreeBuilder) Write() (*Oid, error) {
+	oid := new(Oid)
+	err := C.git_treebuilder_write(oid.toC(), v.repo.ptr, v.ptr)
+
+	if err < 0 {
+		return nil, LastError()
+	}
+
+	return oid, nil
+}
diff --git a/wrapper.c b/wrapper.c
new file mode 100644
index 0000000..4e1304e
--- /dev/null
+++ b/wrapper.c
@@ -0,0 +1,9 @@
+#include "_cgo_export.h"
+#include "git2.h"
+
+int _go_git_treewalk(git_tree *tree, git_treewalk_mode mode, void *ptr)
+{
+	return git_tree_walk(tree, mode, (git_treewalk_cb)&CallbackGitTreeWalk, ptr);
+}
+
+/* EOF */