srpmproc/internal/directives/patch.go

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2021-04-06 19:39:02 +00:00
// Copyright (c) 2021 The Srpmproc Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package directives
import (
"bytes"
"errors"
"fmt"
"git.rockylinux.org/release-engineering/public/srpmproc/internal/data"
srpmprocpb "git.rockylinux.org/release-engineering/public/srpmproc/pb"
"github.com/bluekeyes/go-gitdiff/gitdiff"
"github.com/go-git/go-git/v5"
"log"
)
func patch(cfg *srpmprocpb.Cfg, _ *data.ProcessData, _ *data.ModeData, patchTree *git.Worktree, pushTree *git.Worktree) error {
for _, patch := range cfg.Patch {
patchFile, err := patchTree.Filesystem.Open(patch.File)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_OPEN_PATCH_FILE:%s", patch.File))
}
files, _, err := gitdiff.Parse(patchFile)
if err != nil {
log.Printf("could not parse patch file: %v", err)
return errors.New(fmt.Sprintf("COULD_NOT_PARSE_PATCH_FILE:%s", patch.File))
}
for _, patchedFile := range files {
srcPath := patchedFile.NewName
if !patch.Strict {
srcPath = checkAddPrefix(patchedFile.NewName)
}
var output bytes.Buffer
if !patchedFile.IsDelete && !patchedFile.IsNew {
patchSubjectFile, err := pushTree.Filesystem.Open(srcPath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_OPEN_PATCH_SUBJECT:%s", srcPath))
}
err = gitdiff.NewApplier(patchSubjectFile).ApplyFile(&output, patchedFile)
if err != nil {
log.Printf("could not apply patch: %v", err)
return errors.New(fmt.Sprintf("COULD_NOT_APPLY_PATCH_WITH_SUBJECT:%s", srcPath))
}
}
oldName := patchedFile.OldName
if !patch.Strict {
oldName = checkAddPrefix(patchedFile.OldName)
}
_ = pushTree.Filesystem.Remove(oldName)
_ = pushTree.Filesystem.Remove(srcPath)
if patchedFile.IsNew {
newFile, err := pushTree.Filesystem.Create(srcPath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CREATE_NEW_FILE:%s", srcPath))
}
err = gitdiff.NewApplier(newFile).ApplyFile(&output, patchedFile)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_APPLY_PATCH_TO_NEW_FILE:%s", srcPath))
}
_, err = newFile.Write(output.Bytes())
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_TO_NEW_FILE:%s", srcPath))
}
_, err = pushTree.Add(srcPath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_ADD_NEW_FILE_TO_GIT:%s", srcPath))
}
} else if !patchedFile.IsDelete {
newFile, err := pushTree.Filesystem.Create(srcPath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CREATE_POST_PATCH_FILE:%s", srcPath))
}
_, err = newFile.Write(output.Bytes())
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_POST_PATCH_FILE:%s", srcPath))
}
_, err = pushTree.Add(srcPath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_ADD_POST_PATCH_FILE_TO_GIT:%s", srcPath))
}
} else {
_, err = pushTree.Remove(oldName)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_REMOVE_FILE_FROM_GIT:%s", oldName))
}
}
}
}
return nil
}