1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/builder/dockerfile/internals_unix.go
Tibor Vass e0ef11a4c2 Abstract builder and implement server-side dockerfile builder
This patch creates interfaces in builder/ for building Docker images.
It is a first step in a series of patches to remove the daemon
dependency on builder and later allow a client-side Dockerfile builder
as well as potential builder plugins.

It is needed because we cannot remove the /build API endpoint, so we
need to keep the server-side Dockerfile builder, but we also want to
reuse the same Dockerfile parser and evaluator for both server-side and
client-side.

builder/dockerfile/ and api/server/builder.go contain implementations
of those interfaces as a refactoring of the current code.

Signed-off-by: Tibor Vass <tibor@docker.com>
2015-10-06 19:10:19 -04:00

40 lines
1.2 KiB
Go

// +build !windows
package dockerfile
import (
"os"
"path/filepath"
)
func fixPermissions(source, destination string, uid, gid int, destExisted bool) error {
// If the destination didn't already exist, or the destination isn't a
// directory, then we should Lchown the destination. Otherwise, we shouldn't
// Lchown the destination.
destStat, err := os.Stat(destination)
if err != nil {
// This should *never* be reached, because the destination must've already
// been created while untar-ing the context.
return err
}
doChownDestination := !destExisted || !destStat.IsDir()
// We Walk on the source rather than on the destination because we don't
// want to change permissions on things we haven't created or modified.
return filepath.Walk(source, func(fullpath string, info os.FileInfo, err error) error {
// Do not alter the walk root iff. it existed before, as it doesn't fall under
// the domain of "things we should chown".
if !doChownDestination && (source == fullpath) {
return nil
}
// Path is prefixed by source: substitute with destination instead.
cleaned, err := filepath.Rel(source, fullpath)
if err != nil {
return err
}
fullpath = filepath.Join(destination, cleaned)
return os.Lchown(fullpath, uid, gid)
})
}