1.5.0 RC2

This is a release candidate for version 1.5.0 of Compose.

Note that Compose 1.5.0 requires Docker 1.8.0 or later.

To try it out, run the following commands:

curl -L https://github.com/docker/compose/releases/download/1.5.0rc2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

Or pip install -U docker-compose==1.5.0rc2 if you prefer pip.

Here's what's new:

Major features:

• Compose is now available for Windows.
• Environment variables can be used in the Compose file. See
  https://github.com/docker/compose/blob/129092b7/docs/yml.md#variable-substitution
• Multiple compose files can be specified, allowing you to override
  settings in the default Compose file. See
  https://github.com/docker/compose/blob/129092b7/docs/reference/docker-compose.md
  for more details.
• Compose now produces better error messages when a file contains
  invalid configuration.
• up now waits for all services to exit before shutting down,
  rather than shutting down as soon as one container exits.
• Experimental support for the new docker networking system can be
  enabled with the --x-networking flag. Read more here:
  https://github.com/docker/docker/blob/8fee1c20/docs/userguide/dockernetworks.md

New features:

• You can now optionally pass a mode to volumes_from, e.g.
  volumes_from: ["servicename:ro"].
• Since Docker now lets you create volumes with names, you can refer to those
  volumes by name in docker-compose.yml. For example,
  volumes: ["mydatavolume:/data"] will mount the volume named
  mydatavolume at the path /data inside the container.

If the first component of an entry in volumes starts with a ., / or
~, it is treated as a path and expansion of relative paths is performed as
necessary. Otherwise, it is treated as a volume name and passed straight
through to Docker.

Read more on named volumes and volume drivers here:
https://github.com/docker/docker/blob/244d9c33/docs/userguide/dockervolumes.md

• docker-compose build --pull instructs Compose to pull the base image for
  each Dockerfile before building.
• docker-compose pull --ignore-pull-failures instructs Compose to continue
  if it fails to pull a single service's image, rather than aborting.
• You can now specify an IPC namespace in docker-compose.yml with the ipc
  option.
• Containers created by docker-compose run can now be named with the
  --name flag.
• If you install Compose with pip or use it as a library, it now works with
  Python 3.
• image now supports image digests (in addition to ids and tags), e.g.
  image: "busybox@sha256:38a203e1986cf79639cfb9b2e1d6e773de84002feea2d4eb006b52004ee8502d"
• ports now supports ranges of ports, e.g.

ports:
  - "3000-3005"
  - "9000-9001:8000-8001"

• docker-compose run now supports a -p|--publish parameter, much like
  docker run -p, for publishing specific ports to the host.
• docker-compose pause and docker-compose unpause have been implemented,
  analogous to docker pause and docker unpause.
• When using extends to copy configuration from another service in the same
  Compose file, you can omit the file option.
• Compose can be installed and run as a Docker image. This is an experimental
  feature.

Bug fixes:

• All values for the log_driver option which are supported by the Docker
  daemon are now supported by Compose.
• docker-compose build can now be run successfully against a Swarm cluster.

Thanks @mnowster, @aanand, @moxiegirl, @albers, @mrfuxi, @viranch, @sdurrheimer, @charleswhchan, @ZJaffee, @villlem, @vdemeester, @TomasTomecek, @timbutler, @ticosax, @SvenDowideit, @stedur, @ronen, @md2perpe, @ggtools, @geron, @cweagans, @au-phiware