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// Copyright (C) 2017-2018, 2021 Luke Shumaker <lukeshu@lukeshu.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package libfastimport
import (
"strconv"
"strings"
"github.com/pkg/errors"
)
// This file deals with comments, and with commands for which the
// specification says (or said) that the command "can be used anywhere
// in the stream that comments are accepted".
// comment /////////////////////////////////////////////////////////////////////
// CmdComment is a comment line; not a real command.
type CmdComment struct {
Comment string
}
func (c CmdComment) fiCmdClass() cmdClass { return cmdClassComment }
func (c CmdComment) fiCmdWrite(fiw fiWriter) error {
return fiw.WriteLine("#" + c.Comment)
}
func init() { parser_registerCmd("#", CmdComment{}) }
func (CmdComment) fiCmdRead(fir fiReader) (cmd Cmd, err error) {
line, err := fir.ReadLine()
if err != nil {
return nil, err
}
return CmdComment{Comment: trimLinePrefix(line, "#")}, nil
}
// get-mark ////////////////////////////////////////////////////////////////////
// CmdGetMark requests that the Backend to report back (over the
// auxiliary cat-blob stream) with the SHA-1 corresponding to the
// given Mark.
type CmdGetMark struct {
Mark int
}
func (c CmdGetMark) fiCmdClass() cmdClass {
// Prior to git v2.22.0 this was 'cmdClassComment', but in
// v2.22.0 it was changed to a stricter
// 'cmdClassCommand|cmdClassInCommit'. I want to have better
// backward compatibility, so I'm keeping it as
// 'cmdClassComment'.
return cmdClassComment
}
func (c CmdGetMark) fiCmdWrite(fiw fiWriter) error {
return fiw.WriteLine("get-mark", ":"+strconv.Itoa(c.Mark))
}
func init() { parser_registerCmd("get-mark :", CmdGetMark{}) }
func (CmdGetMark) fiCmdRead(fir fiReader) (cmd Cmd, err error) {
line, err := fir.ReadLine()
if err != nil {
return nil, err
}
c := CmdGetMark{}
c.Mark, err = strconv.Atoi(trimLinePrefix(line, "get-mark :"))
if err != nil {
return nil, errors.Wrap(err, "get-mark")
}
return c, nil
}
// cat-blob ////////////////////////////////////////////////////////////////////
// CmdCatBlob requests that the Backend to report back (over the
// auxiliary cat-blob stream) with the SHA-1 and content of the
// requested blob. The blob can be specified either by a mark
// reference (":<idnum>") or by a full 40-byte SHA-1.
type CmdCatBlob struct {
DataRef string
}
func (c CmdCatBlob) fiCmdClass() cmdClass {
// Prior to git v2.22.0 this was 'cmdClassComment', but in
// v2.22.0 it was changed to a stricter
// 'cmdClassCommand|cmdClassInCommit|cmdClassInFileModify'. I
// don't want to implement cmdClassInFileModify for just this
// one command, and also I want to have better backward
// compatibility; so I'm keeping it as 'cmdClassComment'.
return cmdClassComment
}
func (c CmdCatBlob) fiCmdWrite(fiw fiWriter) error {
return fiw.WriteLine("cat-blob", c.DataRef)
}
func init() { parser_registerCmd("cat-blob ", CmdCatBlob{}) }
func (CmdCatBlob) fiCmdRead(fir fiReader) (cmd Cmd, err error) {
line, err := fir.ReadLine()
if err != nil {
return nil, err
}
return CmdCatBlob{DataRef: trimLinePrefix(line, "cat-blob ")}, nil
}
// ls //////////////////////////////////////////////////////////////////////////
// CmdLs requests that the Backend to report back (over the auxiliary
// cat-blob stream) with information about the object at a path in the
// specified commit. If inside of a commit, specifying the commit is
// optional, and the ongoing commit is used. The commit can be
// specified either by a mark reference (":<idnum>") or by a full
// 40-byte SHA-1.
type CmdLs struct {
DataRef string // optional if inside of a commit
Path Path
}
func (c CmdLs) fiCmdClass() cmdClass {
// Prior to git v2.22.0 the docs said 'ls' was allowed
// anywhere a comment was allowed, but that was never really
// true, and in v2.22.0 the docs were updated to match the
// code.
if c.DataRef == "" {
// Yeah, this will give slightly misleading info to
// parser_registerCmd(), but that's OK,
// parser_registerCmd() only really cares about the
// cmdClassInCommand bit.
return cmdClassInCommit
}
return cmdClassCommand | cmdClassInCommit
}
func (c CmdLs) fiCmdWrite(fiw fiWriter) error {
if c.DataRef == "" {
return fiw.WriteLine("ls", c.Path)
} else {
return fiw.WriteLine("ls", c.DataRef, c.Path)
}
}
func init() { parser_registerCmd("ls ", CmdLs{}) }
func (CmdLs) fiCmdRead(fir fiReader) (cmd Cmd, err error) {
// 'ls' SP <dataref> SP <path> LF
line, err := fir.ReadLine()
if err != nil {
return nil, err
}
str := trimLinePrefix(line, "ls ")
sp := -1
if !strings.HasPrefix(str, "\"") {
sp = strings.IndexByte(line, ' ')
}
c := CmdLs{}
c.Path = PathUnescape(str[sp+1:])
if sp >= 0 {
c.DataRef = str[:sp]
}
return c, nil
}
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