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// Copyright 2019 Luke Shumaker <lukeshu@parabola.nu>
//
// 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 <http://www.gnu.org/licenses/>.
// Command fi-filefilter prunes a fast-import stream, removing
// filenames that do not match a regexp.
package main
import (
"fmt"
"io"
"os"
"regexp"
"time"
"git.lukeshu.com/go/libfastimport"
"github.com/pkg/errors"
"git.parabola.nu/~lukeshu/fastimport-go-utils/fiutil"
)
func usage(w io.Writer) {
fmt.Fprintf(w, "Usage: git fast-export --full-tree | %s REGEXP | git fast-import\n", os.Args[0])
fmt.Fprintf(w, "Prunes a fast-import stream, removing filenames that do not match a regexp\n")
}
func main() {
if len(os.Args) != 2 {
usage(os.Stderr)
os.Exit(2)
}
re, err := regexp.Compile(os.Args[1])
if err != nil {
fmt.Fprintf(os.Stderr, "%s: error: %v\n", os.Args[0], err)
os.Exit(2)
}
frontend := libfastimport.NewFrontend(os.Stdin, os.Stdin, nil)
backend := libfastimport.NewBackend(os.Stdout, os.Stdout, nil)
filter := &FileFilter{
backend: backend,
re: re,
beg: time.Now(),
}
if err := fiutil.RunHandler(frontend, filter); err != nil {
fmt.Fprintf(os.Stderr, "%s: error: %v\n", os.Args[0], err)
os.Exit(1)
}
}
type FileFilter struct {
backend *libfastimport.Backend
re *regexp.Regexp
// statistics
commits int
filesIn int
filesOut int
beg time.Time
}
// file commands ///////////////////////////////////////////////////////////////
func (h *FileFilter) FileModify(cmd libfastimport.FileModify) error {
h.filesIn++
if !h.re.MatchString(string(cmd.Path)) {
return nil
}
h.filesOut++
return h.backend.Do(cmd)
}
func (h *FileFilter) FileModifyInline(cmd libfastimport.FileModifyInline) error {
h.filesIn++
if !h.re.MatchString(string(cmd.Path)) {
return nil
}
h.filesOut++
return h.backend.Do(cmd)
}
func (h *FileFilter) FileDelete(cmd libfastimport.FileDelete) error {
h.filesIn++
if !h.re.MatchString(string(cmd.Path)) {
return nil
}
h.filesOut++
return h.backend.Do(cmd)
}
func (h *FileFilter) FileDeleteAll(cmd libfastimport.FileDeleteAll) error {
return h.backend.Do(cmd)
}
func (h *FileFilter) FileCopy(cmd libfastimport.FileCopy) error {
return errors.New("unexpected \"filecopy\" command: this filter requires --full-tree")
}
func (h *FileFilter) FileRename(cmd libfastimport.FileRename) error {
return errors.New("unexpected \"filerename\" command: this filter requires --full-tree")
}
// statistics //////////////////////////////////////////////////////////////////
func (h *FileFilter) CmdCommitEnd(cmd libfastimport.CmdCommitEnd) error {
h.commits++
fmt.Fprintf(os.Stderr,
"%d commits (%d => %d files) (%.2f commit/s)\r",
h.commits, h.filesIn, h.filesOut,
float64(h.commits)/time.Since(h.beg).Seconds())
return nil
}
// note commands ///////////////////////////////////////////////////////////////
func (h *FileFilter) NoteModify(cmd libfastimport.NoteModify) error {
return h.backend.Do(cmd)
}
func (h *FileFilter) NoteModifyInline(cmd libfastimport.NoteModifyInline) error {
return h.backend.Do(cmd)
}
// other commands //////////////////////////////////////////////////////////////
func (h *FileFilter) CmdBlob(cmd libfastimport.CmdBlob) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdCheckpoint(cmd libfastimport.CmdCheckpoint) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdComment(cmd libfastimport.CmdComment) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdCommit(cmd libfastimport.CmdCommit) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdDone(cmd libfastimport.CmdDone) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdOption(cmd libfastimport.CmdOption) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdProgress(cmd libfastimport.CmdProgress) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdReset(cmd libfastimport.CmdReset) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdTag(cmd libfastimport.CmdTag) error { return h.backend.Do(cmd) }
func (h *FileFilter) CmdCatBlob(cmd libfastimport.CmdCatBlob) (sha1 string, data string, err error) {
return h.backend.CatBlob(cmd)
}
func (h *FileFilter) CmdGetMark(cmd libfastimport.CmdGetMark) (sha1 string, err error) {
return h.backend.GetMark(cmd)
}
func (h *FileFilter) CmdLs(cmd libfastimport.CmdLs) (mode libfastimport.Mode, dataref string, path libfastimport.Path, err error) {
return h.backend.Ls(cmd)
}
func (h *FileFilter) CmdFeature(cmd libfastimport.CmdFeature) error {
switch cmd.Feature {
case "date-format":
if cmd.Argument != "raw" {
return errors.Errorf("date-format=%q: only supports the %q format", cmd.Argument, "raw")
}
return h.backend.Do(cmd)
case "export-marks", "relative-marks", "no-relative-marks", "force", "import-marks", "import-marks-if-exists", "get-mark", "cat-blob", "ls", "notes", "done":
return h.backend.Do(cmd)
default:
return errors.Errorf("unknown feature %q", cmd.Feature)
}
}
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