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Copy pathcommit.go
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229 lines (186 loc) · 5.37 KB
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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"
)
// MessageEncoding is the encoding of commit messages.
type MessageEncoding string
const (
// MessageEncodingUTF8 is the default message encoding.
MessageEncodingUTF8 MessageEncoding = "UTF-8"
)
// Commit
type Commit struct {
doNotCompare
Object
cast_ptr *C.git_commit
}
func (c *Commit) AsObject() *Object {
return &c.Object
}
func (c *Commit) Message() string {
ret := C.GoString(C.git_commit_message(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
func (c *Commit) MessageEncoding() MessageEncoding {
ptr := C.git_commit_message_encoding(c.cast_ptr)
if ptr == nil {
return MessageEncodingUTF8
}
ret := C.GoString(ptr)
runtime.KeepAlive(c)
return MessageEncoding(ret)
}
func (c *Commit) RawMessage() string {
ret := C.GoString(C.git_commit_message_raw(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
// RawHeader gets the full raw text of the commit header.
func (c *Commit) RawHeader() string {
ret := C.GoString(C.git_commit_raw_header(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
// ContentToSign returns the content that will be passed to a signing function for this commit
func (c *Commit) ContentToSign() string {
return c.RawHeader() + "\n" + c.RawMessage()
}
// CommitSigningCallback defines a function type that takes some data to sign and returns (signature, signature_field, error)
type CommitSigningCallback func(string) (signature, signatureField string, err error)
// CommitCreateCallback defines a function type that is called when another
// function is going to create commits (for example, Rebase) to allow callers
// to override the commit creation behavior. For example, users may wish to
// sign commits by providing this information to Repository.CreateCommitBuffer,
// signing that buffer, then calling Repository.CreateCommitWithSignature.
type CommitCreateCallback func(
author, committer *Signature,
messageEncoding MessageEncoding,
message string,
tree *Tree,
parents ...*Commit,
) (oid *Oid, err error)
// WithSignatureUsing creates a new signed commit from this one using the given signing callback
func (c *Commit) WithSignatureUsing(f CommitSigningCallback) (*Oid, error) {
signature, signatureField, err := f(c.ContentToSign())
if err != nil {
return nil, err
}
return c.WithSignature(signature, signatureField)
}
// WithSignature creates a new signed commit from the given signature and signature field
func (c *Commit) WithSignature(signature string, signatureField string) (*Oid, error) {
return c.Owner().CreateCommitWithSignature(
c.ContentToSign(),
signature,
signatureField,
)
}
func (c *Commit) ExtractSignature() (string, string, error) {
var c_signed C.git_buf
defer C.git_buf_dispose(&c_signed)
var c_signature C.git_buf
defer C.git_buf_dispose(&c_signature)
oid := c.Id()
repo := C.git_commit_owner(c.cast_ptr)
runtime.LockOSThread()
defer runtime.UnlockOSThread()
ret := C.git_commit_extract_signature(&c_signature, &c_signed, repo, oid.toC(), nil)
runtime.KeepAlive(oid)
if ret < 0 {
return "", "", MakeGitError(ret)
} else {
return C.GoString(c_signature.ptr), C.GoString(c_signed.ptr), nil
}
}
func (c *Commit) Summary() string {
ret := C.GoString(C.git_commit_summary(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
func (c *Commit) Tree() (*Tree, error) {
var ptr *C.git_tree
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := C.git_commit_tree(&ptr, c.cast_ptr)
runtime.KeepAlive(c)
if err < 0 {
return nil, MakeGitError(err)
}
return allocTree(ptr, c.repo), nil
}
func (c *Commit) TreeId() *Oid {
ret := newOidFromC(C.git_commit_tree_id(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
func (c *Commit) Author() *Signature {
cast_ptr := C.git_commit_author(c.cast_ptr)
ret := newSignatureFromC(cast_ptr)
runtime.KeepAlive(c)
return ret
}
func (c *Commit) Committer() *Signature {
cast_ptr := C.git_commit_committer(c.cast_ptr)
ret := newSignatureFromC(cast_ptr)
runtime.KeepAlive(c)
return ret
}
func (c *Commit) Parent(n uint) *Commit {
var cobj *C.git_commit
ret := C.git_commit_parent(&cobj, c.cast_ptr, C.uint(n))
if ret != 0 {
return nil
}
parent := allocCommit(cobj, c.repo)
runtime.KeepAlive(c)
return parent
}
func (c *Commit) ParentId(n uint) *Oid {
ret := newOidFromC(C.git_commit_parent_id(c.cast_ptr, C.uint(n)))
runtime.KeepAlive(c)
return ret
}
func (c *Commit) ParentCount() uint {
ret := uint(C.git_commit_parentcount(c.cast_ptr))
runtime.KeepAlive(c)
return ret
}
func (c *Commit) Amend(refname string, author, committer *Signature, message string, tree *Tree) (*Oid, error) {
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))
runtime.LockOSThread()
defer runtime.UnlockOSThread()
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)
oid := new(Oid)
cerr := C.git_commit_amend(oid.toC(), c.cast_ptr, cref, authorSig, committerSig, nil, cmsg, tree.cast_ptr)
runtime.KeepAlive(oid)
runtime.KeepAlive(c)
runtime.KeepAlive(tree)
if cerr < 0 {
return nil, MakeGitError(cerr)
}
return oid, nil
}