srpmproc/pkg/directives/lookaside.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.
package directives
import (
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"archive/tar"
"bytes"
"compress/gzip"
"crypto/sha256"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
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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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func lookaside(cfg *srpmprocpb.Cfg, _ *data.ProcessData, md *data.ModeData, patchTree *git.Worktree, pushTree *git.Worktree) error {
for _, directive := range cfg.Lookaside {
var buf bytes.Buffer
writer := tar.NewWriter(&buf)
w := pushTree
if directive.FromPatchTree {
w = patchTree
}
for _, file := range directive.File {
if directive.Tar && directive.ArchiveName == "" {
return errors.New("TAR_NO_ARCHIVE_NAME")
}
path := filepath.Join("SOURCES", file)
if directive.FromPatchTree {
path = file
}
stat, err := w.Filesystem.Stat(path)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_STAT_FILE:%s", path))
}
f, err := w.Filesystem.Open(path)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_OPEN_FILE:%s", path))
}
bts, err := ioutil.ReadAll(f)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_READ_FILE:%s", path))
}
if directive.Tar {
hdr := &tar.Header{
Name: file,
Mode: int64(stat.Mode()),
Size: stat.Size(),
}
err = writer.WriteHeader(hdr)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_TAR_HEADER:%s", file))
}
_, err = writer.Write(bts)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_TAR_FILE:%s", file))
}
} else {
if directive.FromPatchTree {
pushF, err := pushTree.Filesystem.OpenFile(filepath.Join("SOURCES", filepath.Base(file)), os.O_CREATE|os.O_TRUNC|os.O_RDWR, stat.Mode())
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if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CREATE_FILE_IN_PUSH_TREE:%s", file))
}
_, err = pushF.Write(bts)
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_FILE_IN_PUSH_TREE:%s", file))
}
}
md.SourcesToIgnore = append(md.SourcesToIgnore, &data.IgnoredSource{
Name: filepath.Join("SOURCES", file),
HashFunction: sha256.New(),
})
}
}
if directive.Tar {
err := writer.Close()
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CLOSE_TAR:%s", directive.ArchiveName))
}
var gbuf bytes.Buffer
gw := gzip.NewWriter(&gbuf)
gw.Name = fmt.Sprintf("%s.tar.gz", directive.ArchiveName)
gw.ModTime = time.Now()
_, err = gw.Write(buf.Bytes())
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_GZIP:%s", directive.ArchiveName))
}
err = gw.Close()
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CLOSE_GZIP:%s", directive.ArchiveName))
}
path := filepath.Join("SOURCES", fmt.Sprintf("%s.tar.gz", directive.ArchiveName))
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pushF, err := pushTree.Filesystem.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0o644)
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if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_CREATE_TAR_FILE:%s", path))
}
_, err = pushF.Write(gbuf.Bytes())
if err != nil {
return errors.New(fmt.Sprintf("COULD_NOT_WRITE_TAR_FILE:%s", path))
}
md.SourcesToIgnore = append(md.SourcesToIgnore, &data.IgnoredSource{
Name: path,
HashFunction: sha256.New(),
})
}
}
return nil
}