103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
package commands
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import (
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"io"
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"os"
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"github.com/git-lfs/git-lfs/errors"
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"github.com/git-lfs/git-lfs/lfs"
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"github.com/git-lfs/git-lfs/progress"
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"github.com/spf13/cobra"
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)
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// clean cleans an object read from the given `io.Reader`, "from", and writes
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// out a corresponding pointer to the `io.Writer`, "to". If there were any
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// errors encountered along the way, they will be returned immediately if the
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// error is non-fatal, otherwise they will halt using the built in
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// `commands.Panic`.
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//
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// If the object read from "from" is _already_ a clean pointer, then it will be
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// written out verbatim to "to", without trying to make it a pointer again.
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func clean(to io.Writer, from io.Reader, fileName string) error {
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var cb progress.CopyCallback
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var file *os.File
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var fileSize int64
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if len(fileName) > 0 {
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stat, err := os.Stat(fileName)
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if err == nil && stat != nil {
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fileSize = stat.Size()
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localCb, localFile, err := lfs.CopyCallbackFile("clean", fileName, 1, 1)
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if err != nil {
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Error(err.Error())
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} else {
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cb = localCb
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file = localFile
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}
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}
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}
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cleaned, err := lfs.PointerClean(from, fileName, fileSize, cb)
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if file != nil {
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file.Close()
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}
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if cleaned != nil {
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defer cleaned.Teardown()
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}
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if errors.IsCleanPointerError(err) {
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// If the contents read from the working directory was _already_
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// a pointer, we'll get a `CleanPointerError`, with the context
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// containing the bytes that we should write back out to Git.
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_, err = to.Write(errors.GetContext(err, "bytes").([]byte))
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return err
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}
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if err != nil {
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Panic(err, "Error cleaning asset.")
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}
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tmpfile := cleaned.Filename
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mediafile, err := lfs.LocalMediaPath(cleaned.Oid)
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if err != nil {
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Panic(err, "Unable to get local media path.")
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}
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if stat, _ := os.Stat(mediafile); stat != nil {
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if stat.Size() != cleaned.Size && len(cleaned.Pointer.Extensions) == 0 {
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Exit("Files don't match:\n%s\n%s", mediafile, tmpfile)
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}
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Debug("%s exists", mediafile)
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} else {
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if err := os.Rename(tmpfile, mediafile); err != nil {
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Panic(err, "Unable to move %s to %s\n", tmpfile, mediafile)
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}
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Debug("Writing %s", mediafile)
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}
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_, err = lfs.EncodePointer(to, cleaned.Pointer)
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return err
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}
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func cleanCommand(cmd *cobra.Command, args []string) {
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requireStdin("This command should be run by the Git 'clean' filter")
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lfs.InstallHooks(false)
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var fileName string
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if len(args) > 0 {
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fileName = args[0]
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}
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if err := clean(os.Stdout, os.Stdin, fileName); err != nil {
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Error(err.Error())
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}
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}
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func init() {
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RegisterCommand("clean", cleanCommand, nil)
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}
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