git-experiment.go

package main

import (
	"fmt"
	"github.com/Merovius/git2go"
	"os"
)

// $ GOPATH=./vendor go run test.go 
// # command-line-arguments
// ./test.go:34: repo.NewPackbuilder undefined (type *git.Repository has no field or method NewPackbuilder)
func main() {
	fmt.Println(os.Getenv("GOPATH"))

	oid, err := git.NewOidFromString("ec0b0b9228c34acf7cce6082d7fb318ad587a816")
	if err != nil {
		panic(err)
	}

	fmt.Println(oid)

	repo, err := git.OpenRepository("/Users/rick/p/go-git-experiment")
	defer repo.Free()

	if err != nil {
		panic(err)
	}

	commit, err := repo.LookupCommit(oid)

	if err != nil {
		panic(err)
	}

	fmt.Println(commit.Message())

	pb, err := repo.NewPackbuilder()
	//defer pb.Free()

	if err != nil {
		panic(err)
	}

	//fmt.Println(pb.ObjectCount())

	//err = pb.InsertCommit(oid)
	if err != nil {
		panic(err)
	}

	//fmt.Println(pb.ObjectCount())
}

git-log.txt

~p/go-git-experiment/vendor/src/github.com/Merovius/git2go git:(packbuilder) ✗$ gl
commit 3a1bbbdf9dcdf88c909ea9df127f32b126d38547
Author: Axel Wagner <mail+git2go@merovius.de>
Date:   Thu May 16 16:53:21 2013 +0200

    Correct some errors from 1da989e

commit 1da989e28b04807fb9781c3198769630ccb9a0fd
Author: Axel Wagner <mail+git2go@merovius.de>
Date:   Thu May 16 14:02:22 2013 +0200

    Add Write(w io.Writer) to packbuilder
    
    This wraps (*packbuilder).ForEach(), making it possible to write the
    pack easiliy to a tcp-connection, a HTTP-Body or the like.

go-build-experiment.txt

$ GOPATH=./vendor go build -v -x        
WORK=/var/folders/q9/12fpv_bn2yngtr41t2hz7l4m0000gn/T/go-build809812750
_/Users/rick/p/go-git-experiment
mkdir -p $WORK/_/Users/rick/p/go-git-experiment/_obj/
cd /Users/rick/p/go-git-experiment
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/6g -o $WORK/_/Users/rick/p/go-git-experiment/_obj/_go_.6 -p _/Users/rick/p/go-git-experiment -D _/Users/rick/p/go-git-experiment -I $WORK -I vendor/pkg/darwin_amd64 ./test.go
# _/Users/rick/p/go-git-experiment
./test.go:34: repo.NewPackbuilder undefined (type *git.Repository has no field or method NewPackbuilder)

go-build-git2go.txt

~p/go-git-experiment/vendor/src/github.com/Merovius/git2go git:(packbuilder) ✗$ go build -v -x
WORK=/var/folders/q9/12fpv_bn2yngtr41t2hz7l4m0000gn/T/go-build474686434
_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go
mkdir -p $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/
cd /Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go
pkg-config --cflags libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2
pkg-config --libs libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2 libgit2
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/cgo -objdir $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -- -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ blob.go checkout.go commit.go config.go git.go index.go odb.go packbuilder.go reference.go repository.go submodule.go tree.go walk.go
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/6c -FVw -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -I /opt/boxen/homebrew/Cellar/go/1.0.3/pkg/darwin_amd64 -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_defun.6 -DGOOS_darwin -DGOARCH_amd64 $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_defun.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_main.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_main.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_export.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_export.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/blob.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/blob.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/checkout.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/checkout.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/commit.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/commit.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/config.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/config.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/git.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/git.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/index.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/index.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/odb.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/odb.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/packbuilder.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/packbuilder.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/reference.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/reference.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/repository.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/repository.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/submodule.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/submodule.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/tree.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/tree.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/walk.cgo2.o -c $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/walk.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I/usr/local/include -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/wrapper.o -c ./wrapper.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_main.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_export.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/blob.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/checkout.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/commit.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/config.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/git.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/index.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/odb.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/packbuilder.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/reference.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/repository.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/submodule.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/tree.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/walk.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/wrapper.o -L/usr/local/lib -lgit2 -lz -lcrypto -lz
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/cgo -objdir $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -dynimport $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_.o -dynout $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_import.c
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/6c -FVw -I $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/ -I /opt/boxen/homebrew/Cellar/go/1.0.3/pkg/darwin_amd64 -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_import.6 -DGOOS_darwin -DGOARCH_amd64 $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_import.c
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/6g -o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_go_.6 -p _/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go -D _/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go -I $WORK $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_gotypes.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/blob.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/checkout.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/commit.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/config.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/git.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/index.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/odb.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/packbuilder.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/reference.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/repository.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/submodule.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/tree.cgo1.go $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/walk.cgo1.go
/opt/boxen/homebrew/Cellar/go/1.0.3/pkg/tool/darwin_amd64/pack grcP $WORK $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go.a $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_go_.6 $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_import.6 $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_defun.6 $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/_cgo_export.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/blob.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/checkout.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/commit.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/config.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/git.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/index.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/odb.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/packbuilder.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/reference.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/repository.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/submodule.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/tree.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/walk.cgo2.o $WORK/_/Users/rick/p/go-git-experiment/vendor/src/github.com/Merovius/git2go/_obj/wrapper.o

packbuilder.go

// https://raw.github.com/Merovius/git2go/packbuilder/packbuilder.go
package git

/*
#cgo pkg-config: libgit2
#include <git2.h>
#include <git2/errors.h>
#include <git2/pack.h>
#include <stdlib.h>

extern int _go_git_packbuilder_foreach(git_packbuilder *pb, void *payload);
*/
import "C"
import (
	"runtime"
	"unsafe"
	"io"
)

type Packbuilder struct {
	ptr *C.git_packbuilder
}

func (repo *Repository) NewPackbuilder() (*Packbuilder, error) {
	builder := &Packbuilder{}
	ret := C.git_packbuilder_new(&builder.ptr, repo.ptr)
	if ret != 0 {
		return nil, LastError()
	}
	runtime.SetFinalizer(builder, (*Packbuilder).Free)
	return builder, nil
}

func (pb *Packbuilder) Free() {
	runtime.SetFinalizer(pb, nil)
	C.git_packbuilder_free(pb.ptr)
}

func (pb *Packbuilder) Insert(id *Oid, name string) error {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	ret := C.git_packbuilder_insert(pb.ptr, id.toC(), cname)
	if ret != 0 {
		return LastError()
	}
	return nil
}

func (pb *Packbuilder) InsertCommit(id *Oid) error {
	ret := C.git_packbuilder_insert_commit(pb.ptr, id.toC())
	if ret != 0 {
		return LastError()
	}
	return nil
}

func (pb *Packbuilder) InsertTree(id *Oid) error {
	ret := C.git_packbuilder_insert_tree(pb.ptr, id.toC())
	if ret != 0 {
		return LastError()
	}
	return nil
}

func (pb *Packbuilder) ObjectCount() uint32 {
	return uint32(C.git_packbuilder_object_count(pb.ptr))
}

func (pb *Packbuilder) WriteToFile(name string) error {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	ret := C.git_packbuilder_write(pb.ptr, cname)
	if ret != 0 {
		return LastError()
	}
	return nil
}

func (pb *Packbuilder) Write(w io.Writer) error {
	ch := pb.ForEach()
	for slice := range ch {
		_, err := w.Write(slice)
		if err != nil {
			return err
		}
	}
	return nil
}

func (pb *Packbuilder) Written() uint32 {
	return uint32(C.git_packbuilder_written(pb.ptr))
}

//export packbuilderForEachCb
func packbuilderForEachCb(buf unsafe.Pointer, size C.size_t, payload unsafe.Pointer) int {
	ch := *(*chan []byte)(payload)

	slice := C.GoBytes(buf, C.int(size))
	ch <- slice
	return 0
}

func (pb *Packbuilder) forEachWrap(ch chan []byte) {
	C._go_git_packbuilder_foreach(pb.ptr, unsafe.Pointer(&ch))
	close(ch)
}

func (pb *Packbuilder) ForEach() chan []byte {
	ch := make(chan []byte, 0)
	go pb.forEachWrap(ch)
	return ch
}

repository.go

// https://raw.github.com/Merovius/git2go/packbuilder/repository.go
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 OpenRepository(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, (*Repository).Free)
	return repo, nil
}

func InitRepository(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, (*Repository).Free)
	return repo, nil
}

func (v *Repository) Free() {
	runtime.SetFinalizer(v, nil)
	C.git_repository_free(v.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) Index() (*Index, error) {
	var ptr *C.git_index
	ret := C.git_repository_index(&ptr, v.ptr)
	if ret < 0 {
		return nil, LastError()
	}

	return newIndexFromC(ptr), 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
}

func (v *Repository) LookupBlob(o *Oid) (*Blob, error) {
	blob := new(Blob)
	ecode := C.git_blob_lookup(&blob.ptr, v.ptr, o.toC())
	if ecode < 0 {
		return nil, LastError()
	}

	runtime.SetFinalizer(blob, (*Blob).Free)
	return blob, nil
}

func (v *Repository) LookupReference(name string) (*Reference, error) {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	var ptr *C.git_reference

	ecode := C.git_reference_lookup(&ptr, v.ptr, cname)
	if ecode < 0 {
		return nil, LastError()
	}

	return newReferenceFromC(ptr), nil
}

func (v *Repository) CreateReference(name string, oid *Oid, force bool) (*Reference, error) {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	var ptr *C.git_reference

	ecode := C.git_reference_create(&ptr, v.ptr, cname, oid.toC(), cbool(force))
	if ecode < 0 {
		return nil, LastError()
	}

	return newReferenceFromC(ptr), nil
}

func (v *Repository) CreateSymbolicReference(name, target string, force bool) (*Reference, error) {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	ctarget := C.CString(target)
	defer C.free(unsafe.Pointer(ctarget))
	var ptr *C.git_reference

	ecode := C.git_reference_symbolic_create(&ptr, v.ptr, cname, ctarget, cbool(force))
	if ecode < 0 {
		return nil, LastError()
	}

	return newReferenceFromC(ptr), nil
}

func (v *Repository) Walk() (*RevWalk, error) {
	walk := new(RevWalk)
	ecode := C.git_revwalk_new(&walk.ptr, v.ptr)
	if ecode < 0 {
		return nil, LastError()
	}

	walk.repo = v
	runtime.SetFinalizer(walk, freeRevWalk)
	return walk, nil
}

func (v *Repository) CreateCommit(
	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))

	var cparents []*C.git_commit = nil
	var parentsarg **C.git_commit = nil

	nparents:= len(parents)
	if nparents > 0 {
		cparents = make([]*C.git_commit, nparents)
		for i, v := range parents {
			cparents[i] = v.ptr
		}
		parentsarg = &cparents[0]
	}

	authorSig := author.toC()
	defer C.git_signature_free(authorSig)

	committerSig := committer.toC()
	defer C.git_signature_free(committerSig)

	ret := C.git_commit_create(
		oid.toC(), v.ptr, cref,
		authorSig, committerSig,
		nil, cmsg, tree.ptr, C.int(nparents), parentsarg)

	if ret < 0 {
		return nil, LastError()
	}

	return oid, nil
}

func (v *Odb) Free() {
	runtime.SetFinalizer(v, nil)
	C.git_odb_free(v.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, (*Odb).Free)
	return
}

func (repo *Repository) Path() string {
	return C.GoString(C.git_repository_path(repo.ptr))
}

func (repo *Repository) IsBare() (bool) {
	return C.git_repository_is_bare(repo.ptr) != 0
}

func (repo *Repository) Workdir() string {
	return C.GoString(C.git_repository_workdir(repo.ptr))
}

func (repo *Repository) SetWorkdir(workdir string, updateGitlink bool) error {
	cstr := C.CString(workdir)
	defer C.free(unsafe.Pointer(cstr))

	if C.git_repository_set_workdir(repo.ptr, cstr, cbool(updateGitlink)) < 0 {
		return LastError()
	}
	return nil
}

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
}