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package commands
import (
"io"
"os"
"github.com/git-lfs/git-lfs/v3/errors"
"github.com/git-lfs/git-lfs/v3/lfs"
"github.com/git-lfs/git-lfs/v3/tools"
"github.com/git-lfs/git-lfs/v3/tr"
"github.com/spf13/cobra"
)
// clean cleans an object read from the given `io.Reader`, "from", and writes
// out a corresponding pointer to the `io.Writer`, "to". If there were any
// errors encountered along the way, they will be returned immediately if the
// error is non-fatal, otherwise they will halt using the built in
// `commands.Panic`.
//
// If fileSize is given as a non-negative (>= 0) integer, that value is used
// with preference to os.Stat(fileName).Size(). If it is given as negative, the
// value from the `stat(1)` call will be used instead.
//
// If the object read from "from" is _already_ a clean pointer, then it will be
// written out verbatim to "to", without trying to make it a pointer again.
func clean(gf *lfs.GitFilter, to io.Writer, from io.Reader, fileName string, fileSize int64) (*lfs.Pointer, error) {
var cb tools.CopyCallback
var file *os.File
if len(fileName) > 0 {
stat, err := os.Stat(fileName)
if err == nil && stat != nil {
if fileSize < 0 {
fileSize = stat.Size()
}
localCb, localFile, err := gf.CopyCallbackFile("clean", fileName, 1, 1)
if err != nil {
Error(err.Error())
} else {
cb = localCb
file = localFile
}
}
}
cleaned, err := gf.Clean(from, fileName, fileSize, cb)
if file != nil {
file.Close()
}
if cleaned != nil {
defer cleaned.Teardown()
}
if errors.IsCleanPointerError(err) {
// If the contents read from the working directory was _already_
// a pointer, we'll get a `CleanPointerError`, with the context
// containing the bytes that we should write back out to Git.
_, err = to.Write(errors.GetContext(err, "bytes").([]byte))
return nil, err
}
if err != nil {
ExitWithError(errors.Wrap(err, tr.Tr.Get("Error cleaning Git LFS object")))
}
tmpfile := cleaned.Filename
mediafile, err := gf.ObjectPath(cleaned.Oid)
if err != nil {
Panic(err, tr.Tr.Get("Unable to get local media path."))
}
if stat, _ := os.Stat(mediafile); stat != nil {
if stat.Size() != cleaned.Size && len(cleaned.Pointer.Extensions) == 0 {
Exit("%s\n%s\n%s", tr.Tr.Get("Files don't match:"), mediafile, tmpfile)
}
Debug("%s exists", mediafile)
} else {
if err := os.Rename(tmpfile, mediafile); err != nil {
Panic(err, tr.Tr.Get("Unable to move %s to %s", tmpfile, mediafile))
}
Debug(tr.Tr.Get("Writing %s", mediafile))
}
_, err = lfs.EncodePointer(to, cleaned.Pointer)
return cleaned.Pointer, err
}
func cleanCommand(cmd *cobra.Command, args []string) {
requireStdin(tr.Tr.Get("This command should be run by the Git 'clean' filter"))
setupRepository()
installHooks(false)
var fileName string
if len(args) > 0 {
fileName = args[0]
}
gitfilter := lfs.NewGitFilter(cfg)
ptr, err := clean(gitfilter, os.Stdout, os.Stdin, fileName, -1)
if err != nil {
Error(err.Error())
}
if ptr != nil && possiblyMalformedObjectSize(ptr.Size) {
Error(tr.Tr.Get("Possibly malformed conversion on Windows, see `git lfs help smudge` for more details."))
}
}
func init() {
RegisterCommand("clean", cleanCommand, nil)
}
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