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package svn2git2aur
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"strings"
"git.lukeshu.com/go/libfastimport"
)
type fullcommit struct {
metadata libfastimport.CmdCommit
fileactions []libfastimport.Cmd
}
type Filter struct {
fromRef string
toPfx string
frontend *libfastimport.Frontend
backend *libfastimport.Backend
refs map[string]string
mark int
curCommitIn libfastimport.CmdCommit
curCommitOut map[string]fullcommit
}
func NewFilter(fromRef string, toPfx string) (*Filter, error) {
var err error
ret := &Filter{
fromRef: fromRef,
toPfx: toPfx,
}
ret.refs, err = gitRefs()
if err != nil {
return nil, err
}
ret.frontend, err = gitFastExport(
"--use-done-feature",
"--no-data",
"--", fromRef)
if err != nil {
return nil, err
}
ret.backend, err = gitFastImport("--done")
if err != nil {
return nil, err
}
return ret, nil
}
func (f *Filter) newmark() int {
f.mark++
return f.mark
}
func (f *Filter) infofile(name string) string {
return "info/svn2git2aur/" + name
}
func (f *Filter) pkgbuild2srcinfo(pkgbuildId string) (string, error) {
cachefilename := f.infofile("pkgbuild2srcinfo/" + pkgbuildId)
for {
// Try to get a cached result
b, err := ioutil.ReadFile(cachefilename)
if err == nil && len(bytes.TrimSpace(b)) == 40 {
return string(bytes.TrimSpace(b)), nil
}
// Read the PKGBUILD
sha1, data, err := f.backend.CatBlob(libfastimport.CmdCatBlob{DataRef: pkgbuildId})
if sha1 != pkgbuildId {
return "", fmt.Errorf("PKGBUILD sha1 mismatch: %q != %q", pkgbuildId, sha1)
}
// Write the PKGBUILD to a temporary file to pass to makepkg
file, err := os.OpenFile(f.infofile("tmp/PKGBUILD"), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return "", err
}
_, err = io.WriteString(file, data)
file.Close()
if err != nil {
return "", err
}
// Run makepkg on the PKGBUILD to get a .SRCINFO
cmd := exec.Command("makepkg", "--printsrcinfo")
cmd.Dir = f.infofile("tmp")
srcinfoBody, err := cmd.Output()
if err != nil {
return "", err
}
// Write the .SRCINFO back in to git
mark := f.newmark()
err = f.backend.Do(libfastimport.CmdBlob{
Mark: mark,
Data: string(srcinfoBody),
})
if err != nil {
return "", err
}
// Now get the new ID of the .SRCINFO from git
srcinfoId, err := f.backend.GetMark(libfastimport.CmdGetMark{
Mark: mark,
})
if err != nil {
return "", err
}
// Write the srcinfoId in to the cache
file, err = os.OpenFile(cachefilename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
_, err = io.WriteString(file, srcinfoId)
file.Close()
if err != nil {
return "", err
}
}
}
func gitsvnid2commit(gitsvnid string, searchrange string) (string, error) {
cmd := exec.Command("git", "log",
"-n1",
"--format=%H",
"--grep=^git-svn-id: "+gitsvnid+"$",
searchrange)
out, err := cmd.Output()
return strings.TrimSpace(string(out)), err
}
func (f *Filter) Run() error {
for {
cmd, err := f.frontend.ReadCmd()
if err != nil {
return err
}
switch cmdt := cmd.(type) {
case libfastimport.CmdFeature, libfastimport.CmdOption, libfastimport.CmdCheckpoint, libfastimport.CmdProgress, libfastimport.CmdComment:
err = f.backend.Do(cmd)
if err != nil {
return err
}
case libfastimport.CmdDone:
err = f.backend.Do(cmd)
if err != nil {
return err
}
cmd, err := f.frontend.ReadCmd()
if cmd != nil || err != io.EOF {
return fmt.Errorf("git fast-export kept going after 'done': cmd=%v err=%v", cmd, err)
}
return nil
case libfastimport.CmdReset:
// TODO
case libfastimport.CmdCommit:
// TODO
case libfastimport.CmdCommitEnd:
// TODO
case libfastimport.FileModify:
branchname := filename2branchname(string(cmdt.Path))
if branchname == "" {
continue
}
branch_ref := f.toPfx + "/" + path.Dir(string(cmdt.Path))
from_dataref, from_dataref_ok := f.refs[branch_ref]
if from_dataref_ok {
file_mode, file_dataref, _, err := f.backend.Ls(libfastimport.CmdLs{DataRef: from_dataref, Path: cmdt.Path})
if err != nil {
return err
}
if file_mode == cmdt.Mode && file_dataref == cmdt.DataRef {
continue
}
} else {
from_dataref = branch_ref + "^0"
}
if _, ok := f.curCommitOut[branch_ref]; !ok {
f.curCommitOut[branch_ref] = fullcommit{metadata: libfastimport.CmdCommit{
Ref: branch_ref,
Mark: f.newmark(),
Author: f.curCommitIn.Author,
Committer: f.curCommitIn.Committer,
Msg: f.curCommitIn.Msg,
From: from_dataref,
Merge: nil,
}}
}
//outcommit := f.curCommitOut[branch_ref]
// TODO
case libfastimport.FileDelete:
//ref := f.toPfx + "/" + path.Dir(string(cmdt.Path))
// TODO
}
}
return nil
}
|
