- Fixed a bug where issuing a `docker-compose pull` command on services
  without a defined image key would cause Compose to crash.

- Volumes and binds are now mounted in the order they are declared in the
  service definition.

### Miscellaneous

- The `zsh` completion script has been updated with new options, and no
  longer suggests container names where service names are expected.

## 1.22.0

(2018-07-17)

### New features

#### Compose format version 3.7

- Introduced version 3.7 of the `docker-compose.yml` specification.
  This version requires Docker Engine 18.06.0 or above.

- Added support for `rollback_config` in the deploy configuration

- Added support for the `init` parameter in service configurations

- Added support for extension fields in service, network, volume, secret,
  and config configurations

#### Compose format version 2.4

- Added support for extension fields in service, network,
  and volume configurations

### Bug fixes

- Fixed a bug that prevented deployment with some Compose files when
  `DOCKER_DEFAULT_PLATFORM` was set

- Compose will no longer try to create containers or volumes with
  invalid starting characters

- Fixed several bugs that prevented Compose commands from working properly
  with containers created with an older version of Compose

- Fixed an issue with the output of `docker-compose config` with the
  `--compatibility-mode` flag enabled when the source file contains
  attachable networks

- Fixed a bug that prevented the `gcloud` credential store from working
  properly when used with the Compose binary on UNIX

- Fixed a bug that caused connection errors when trying to operate
  over a non-HTTPS TCP connection on Windows

- Fixed a bug that caused builds to fail on Windows if the Dockerfile
  was located in a subdirectory of the build context

- Fixed an issue that prevented proper parsing of UTF-8 BOM encoded
  Compose files on Windows

- Fixed an issue with handling of the double-wildcard (`**`) pattern in `.dockerignore` files when using `docker-compose build`

- Fixed a bug that caused auth values in legacy `.dockercfg` files to be ignored
- `docker-compose build` will no longer attempt to create image names starting with an invalid character

## 1.21.2

(2018-05-03)

### Bug fixes

- Fixed a bug where the ip_range attribute in IPAM configs was prevented
  from passing validation

## 1.21.1

(2018-04-27)

### Bug fixes

- In 1.21.0, we introduced a change to how project names are sanitized for
  internal use in resource names. This caused issues when manipulating an
  existing, deployed application whose name had changed as a result.
  This release properly detects resources using "legacy" naming conventions.

- Fixed an issue where specifying an in-context Dockerfile using an absolute
  path would fail despite being valid.

- Fixed a bug where IPAM option changes were incorrectly detected, preventing
  redeployments.

- Validation of v2 files now properly checks the structure of IPAM configs.

- Improved support for credentials stores on Windows to include binaries using
  extensions other than `.exe`. The list of valid extensions is determined by
  the contents of the `PATHEXT` environment variable.

- Fixed a bug where Compose would generate invalid binds containing duplicate
  elements with some v3.2 files, triggering errors at the Engine level during
  deployment.

## 1.21.0

(2018-04-11)

### New features

#### Compose file version 2.4

- Introduced version 2.4 of the `docker-compose.yml` specification.
  This version requires Docker Engine 17.12.0 or above.

- Added support for the `platform` parameter in service definitions.
  If supplied, the parameter is also used when performing build for the
  service.

#### Compose file version 2.2 and up

- Added support for the `cpu_rt_period` and `cpu_rt_runtime` parameters
  in service definitions (2.x only).

#### Compose file version 2.1 and up

- Added support for the `cpu_period` parameter in service definitions
  (2.x only).