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package git
/*
#include <git2.h>
extern int _go_git_treewalk(git_tree *tree, git_treewalk_mode mode, void *ptr);
*/
import "C"
import (
"runtime"
"unsafe"
)
type Filemode int
const (
FilemodeTree Filemode = C.GIT_FILEMODE_TREE
FilemodeBlob Filemode = C.GIT_FILEMODE_BLOB
FilemodeBlobExecutable Filemode = C.GIT_FILEMODE_BLOB_EXECUTABLE
FilemodeLink Filemode = C.GIT_FILEMODE_LINK
FilemodeCommit Filemode = C.GIT_FILEMODE_COMMIT
)
type Tree struct {
Object
cast_ptr *C.git_tree
}
func (t *Tree) AsObject() *Object {
return &t.Object
}
type TreeEntry struct {
Name string
Id *Oid
Type ObjectType
Filemode Filemode
}
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)),
ObjectType(C.git_tree_entry_type(entry)),
Filemode(C.git_tree_entry_filemode(entry)),
}
}
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)
if entry == nil {
return nil
}
goEntry := newTreeEntry(entry)
runtime.KeepAlive(t)
return goEntry
}
// EntryById performs a lookup for a tree entry with the given SHA value.
//
// It returns a *TreeEntry that is owned by the Tree. You don't have to
// 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 {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
entry := C.git_tree_entry_byid(t.cast_ptr, id.toC())
runtime.KeepAlive(id)
if entry == nil {
return nil
}
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) {
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
var entry *C.git_tree_entry
runtime.LockOSThread()
defer runtime.UnlockOSThread()
ret := C.git_tree_entry_bypath(&entry, t.cast_ptr, cpath)
runtime.KeepAlive(t)
if ret < 0 {
return nil, MakeGitError(ret)
}
defer C.git_tree_entry_free(entry)
return newTreeEntry(entry), nil
}
func (t Tree) EntryByIndex(index uint64) *TreeEntry {
entry := C.git_tree_entry_byindex(t.cast_ptr, C.size_t(index))
if entry == nil {
return nil
}
goEntry := newTreeEntry(entry)
runtime.KeepAlive(t)
return goEntry
}
func (t Tree) EntryCount() uint64 {
num := C.git_tree_entrycount(t.cast_ptr)
runtime.KeepAlive(t)
return uint64(num)
}
type TreeWalkCallback func(string, *TreeEntry) int
//export CallbackGitTreeWalk
func CallbackGitTreeWalk(_root *C.char, _entry unsafe.Pointer, 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)))
} else {
panic("invalid treewalk callback")
}
}
func (t Tree) Walk(callback TreeWalkCallback) error {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
ptr := pointerHandles.Track(callback)
defer pointerHandles.Untrack(ptr)
err := C._go_git_treewalk(
t.cast_ptr,
C.GIT_TREEWALK_PRE,
ptr,
)
runtime.KeepAlive(t)
if err < 0 {
return MakeGitError(err)
}
return nil
}
type TreeBuilder struct {
ptr *C.git_treebuilder
repo *Repository
}
func (v *TreeBuilder) Free() {
runtime.SetFinalizer(v, nil)
C.git_treebuilder_free(v.ptr)
}
func (v *TreeBuilder) Insert(filename string, id *Oid, filemode Filemode) error {
cfilename := C.CString(filename)
defer C.free(unsafe.Pointer(cfilename))
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := C.git_treebuilder_insert(nil, v.ptr, cfilename, id.toC(), C.git_filemode_t(filemode))
runtime.KeepAlive(v)
runtime.KeepAlive(id)
if err < 0 {
return MakeGitError(err)
}
return nil
}
func (v *TreeBuilder) Remove(filename string) error {
cfilename := C.CString(filename)
defer C.free(unsafe.Pointer(cfilename))
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := C.git_treebuilder_remove(v.ptr, cfilename)
runtime.KeepAlive(v)
if err < 0 {
return MakeGitError(err)
}
return nil
}
func (v *TreeBuilder) Write() (*Oid, error) {
oid := new(Oid)
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := C.git_treebuilder_write(oid.toC(), v.ptr)
runtime.KeepAlive(v)
if err < 0 {
return nil, MakeGitError(err)
}
return oid, nil
}
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