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package git
/*
#cgo pkg-config: libgit2
#include <git2.h>
#include <git2/errors.h>
*/
import "C"
import (
"errors"
"strings"
"unsafe"
)
var ErrEUser = errors.New("Error in user callback function")
type ListFlags uint
type BranchType uint
const (
BRANCH_LOCAL BranchType = C.GIT_BRANCH_LOCAL
BRANCH_REMOTE = C.GIT_BRANCH_REMOTE
)
const (
REFS_DIR = "refs/"
REFS_HEADS_DIR = REFS_DIR + "heads/"
REFS_TAGS_DIR = REFS_DIR + "tags/"
REFS_REMOTES_DIR = REFS_DIR + "remotes/"
)
type Branch struct {
Reference
}
func (repo *Repository) CreateBranch(branchName string, target *Commit, force bool) (*Reference, error) {
ref := new(Reference)
cBranchName := C.CString(branchName)
cForce := cbool(force)
err := C.git_branch_create(&ref.ptr, repo.ptr, cBranchName, target.ptr, cForce)
if err < 0 {
return nil, LastError()
}
return ref, nil
}
func (b *Branch) BranchDelete() error {
if err := C.git_branch_delete(b.ptr); err < 0 {
return LastError()
}
return nil
}
type BranchForeachCB func(name string, flags ListFlags, payload interface{}) error
func (repo *Repository) BranchForeach(flags ListFlags, callback BranchForeachCB, payload interface{}) error {
iter, err := repo.NewReferenceIterator()
if err != nil {
return err
}
for {
ref, err := iter.Next()
if err == ErrIterOver {
break
}
if (flags == ListFlags(BRANCH_LOCAL)) && strings.HasPrefix(ref.Name(), REFS_HEADS_DIR) {
name := strings.TrimPrefix(ref.Name(), REFS_HEADS_DIR)
err = callback(name, ListFlags(BRANCH_LOCAL), payload)
if err != nil {
return err
}
}
if (flags == ListFlags(BRANCH_REMOTE)) && strings.HasPrefix(ref.Name(), REFS_REMOTES_DIR) {
name := strings.TrimPrefix(ref.Name(), REFS_REMOTES_DIR)
err = callback(name, ListFlags(BRANCH_REMOTE), payload)
if err != nil {
return err
}
}
}
if err == ErrIterOver {
err = nil
}
return err
}
func (b *Branch) Move(newBranchName string, force bool) (*Branch, error) {
newBranch := new(Branch)
cNewBranchName := C.CString(newBranchName)
cForce := cbool(force)
err := C.git_branch_move(&newBranch.ptr, b.ptr, cNewBranchName, cForce)
if err < 0 {
return nil, LastError()
}
return newBranch, nil
}
func (b *Branch) IsHead() (bool, error) {
isHead := C.git_branch_is_head(b.ptr)
switch isHead {
case 1:
return true, nil
case 0:
return false, nil
default:
return false, LastError()
}
}
func (repo *Repository) BranchLookup(branchName string, bt BranchType) (*Branch, error) {
branch := new(Branch)
cName := C.CString(branchName)
err := C.git_branch_lookup(&branch.ptr, repo.ptr, cName, C.git_branch_t(bt))
if err < 0 {
return nil, LastError()
}
return branch, nil
}
func (b *Branch) Name() (string, error) {
var cName *C.char
defer C.free(unsafe.Pointer(cName))
err := C.git_branch_name(&cName, b.ptr)
if err < 0 {
return "", LastError()
}
return C.GoString(cName), nil
}
func (repo *Repository) RemoteName(canonicalBranchName string) (string, error) {
cName := C.CString(canonicalBranchName)
// Obtain the length of the name
ret := C.git_branch_remote_name(nil, 0, repo.ptr, cName)
if ret < 0 {
return "", LastError()
}
cBuf := (*C.char)(C.malloc(C.size_t(ret)))
defer C.free(unsafe.Pointer(cBuf))
// Actually obtain the name
ret = C.git_branch_remote_name(cBuf, C.size_t(ret), repo.ptr, cName)
if ret < 0 {
return "", LastError()
}
return C.GoString(cBuf), nil
}
func (b *Branch) SetUpstream(upstreamName string) error {
cName := C.CString(upstreamName)
err := C.git_branch_set_upstream(b.ptr, cName)
if err < 0 {
return LastError()
}
return nil
}
func (b *Branch) Upstream() (*Branch, error) {
upstream := new(Branch)
err := C.git_branch_upstream(&upstream.ptr, b.ptr)
if err < 0 {
return nil, LastError()
}
return upstream, nil
}
func (repo *Repository) UpstreamName(canonicalBranchName string) (string, error) {
cName := C.CString(canonicalBranchName)
// Obtain the length of the name
ret := C.git_branch_upstream_name(nil, 0, repo.ptr, cName)
if ret < 0 {
return "", LastError()
}
cBuf := (*C.char)(C.malloc(C.size_t(ret)))
defer C.free(unsafe.Pointer(cBuf))
// Actually obtain the name
ret = C.git_branch_upstream_name(cBuf, C.size_t(ret), repo.ptr, cName)
if ret < 0 {
return "", LastError()
}
return C.GoString(cBuf), nil
}
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