dotcloud/docker — pull request #6857 by vbatts (2014-07-05 20:54:15+00:00)
Title: docker save: fix the 'repositories' file

For various use cases, the 'repositories' file does not match expected
behavior.

Like,

docker save busybox:latest | tar t

Before:

[...]
busybox:latest/
busybox:latest/VERSION
busybox:latest/json
busybox:latest/layer.tar
# note, the layer name, and lack of 'repositories' file

Now:

[...]
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/VERSION
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/json
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/layer.tar
repositories
# and the repositories file is correct for the single tagged
# image.
#> {"busybox":{"latest":"a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721"}}

and

docker save a9eb17255234 | tar t

Before:
[...]
a9eb17255234/
a9eb17255234/VERSION
a9eb17255234/json
a9eb17255234/layer.tar
# Note the truncated layer name

Now:
[...]
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/VERSION
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/json
a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721/layer.tar
# There is no 'repositories' file, because there is no named repo

Docker-DCO-1.1-Signed-off-by: Vincent Batts (github: vbatts)