srpmproc/pkg/directives/replace.go

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// 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.
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package directives
import (
"errors"
"fmt"
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"io/ioutil"
"os"
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"github.com/go-git/go-git/v5"
srpmprocpb "github.com/rocky-linux/srpmproc/pb"
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"github.com/rocky-linux/srpmproc/pkg/data"
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)
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func replace(cfg *srpmprocpb.Cfg, pd *data.ProcessData, _ *data.ModeData, patchTree *git.Worktree, pushTree *git.Worktree) error {
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for _, replace := range cfg.Replace {
filePath := checkAddPrefix(replace.File)
stat, err := pushTree.Filesystem.Stat(filePath)
if replace.File == "" || err != nil {
return errors.New(fmt.Sprintf("INVALID_FILE:%s", filePath))
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}
err = pushTree.Filesystem.Remove(filePath)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_REMOVE_OLD_FILE:%s", filePath))
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}
f, err := pushTree.Filesystem.OpenFile(filePath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, stat.Mode())
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_OPEN_REPLACEMENT:%s", filePath))
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}
switch replacing := replace.Replacing.(type) {
case *srpmprocpb.Replace_WithFile:
fPatch, err := patchTree.Filesystem.OpenFile(replacing.WithFile, os.O_RDONLY, 0644)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_OPEN_REPLACING:%s", replacing.WithFile))
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}
replacingBytes, err := ioutil.ReadAll(fPatch)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_READ_REPLACING:%s", replacing.WithFile))
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}
_, err = f.Write(replacingBytes)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_REPLACING:%s", replacing.WithFile))
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}
break
case *srpmprocpb.Replace_WithInline:
_, err := f.Write([]byte(replacing.WithInline))
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_INLINE:%s", filePath))
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}
break
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case *srpmprocpb.Replace_WithLookaside:
bts, err := pd.BlobStorage.Read(replacing.WithLookaside)
if err != nil {
return err
}
hasher := pd.CompareHash(bts, replacing.WithLookaside)
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if hasher == nil {
return errors.New("LOOKASIDE_FILE_AND_HASH_NOT_MATCHING")
}
_, err = f.Write(bts)
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if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_LOOKASIDE:%s", filePath))
}
break
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}
}
return nil
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}