Docker Buildx Release Notes: v0.5.0 (Continued), v0.4.2, v0.4.1, and v0.4.0

- Disable user namespace remapping in `docker-container` driver. [docker/buildx#462](https://github.com/docker/buildx/issues/462) - Allow `--builder` flag to switch to default instance. [docker/buildx#425](https://github.com/docker/buildx/issues/425) - Avoid warn on empty `BUILDX_NO_DEFAULT_LOAD` config value. [docker/buildx#390](https://github.com/docker/buildx/issues/390) - Replace error generated by `quiet` option by a warning. [docker/buildx#403](https://github.com/docker/buildx/issues/403) - CI has been switched to GitHub Actions. [docker/buildx#451](https://github.com/docker/buildx/issues/451), [docker/buildx#463](https://github.com/docker/buildx/issues/463), [docker/buildx#466](https://github.com/docker/buildx/issues/466), [docker/buildx#468](https://github.com/docker/buildx/issues/468), [docker/buildx#471](https://github.com/docker/buildx/issues/471) ### Fixes - Handle lowercase Dockerfile name as a fallback for backward compatibility. [docker/buildx#444](https://github.com/docker/buildx/issues/444) For more details, see the complete release notes in the [Buildx GitHub repository](https://github.com/docker/buildx/releases/tag/v0.5.0). ## 0.4.2 {{< release-date date="2020-08-22" >}} ### New features - Support `cacheonly` exporter. [docker/buildx#337](https://github.com/docker/buildx/issues/337) ### Enhancements - Update `go-cty` to pull in more `stdlib` functions. [docker/buildx#277](https://github.com/docker/buildx/issues/277) - Improve error checking on load. [docker/buildx#281](https://github.com/docker/buildx/issues/281) ### Fixes - Fix parsing json config with HCL. [docker/buildx#280](https://github.com/docker/buildx/issues/280) - Ensure `--builder` is wired from root options. [docker/buildx#321](https://github.com/docker/buildx/issues/321) - Remove warning for multi-platform iidfile. [docker/buildx#351](https://github.com/docker/buildx/issues/351) For more details, see the complete release notes in the [Buildx GitHub repository](https://github.com/docker/buildx/releases/tag/v0.4.2). ## 0.4.1 {{< release-date date="2020-05-01" >}} ### Fixes - Fix regression on flag parsing. [docker/buildx#268](https://github.com/docker/buildx/issues/268) - Fix using pull and no-cache keys in HCL targets. [docker/buildx#268](https://github.com/docker/buildx/issues/268) For more details, see the complete release notes in the [Buildx GitHub repository](https://github.com/docker/buildx/releases/tag/v0.4.1). ## 0.4.0 {{< release-date date="2020-04-30" >}} ### New features - Add `kubernetes` driver. [docker/buildx#167](https://github.com/docker/buildx/issues/167) - New global `--builder` flag to override builder instance for a single command. [docker/buildx#246](https://github.com/docker/buildx/issues/246) - New `prune` and `du` commands for managing local builder cache. [docker/buildx#249](https://github.com/docker/buildx/issues/249) - You can now set the new `pull` and `no-cache` options for HCL targets. [docker/buildx#165](https://github.com/docker/buildx/issues/165) ### Enhancements - Upgrade Bake to HCL2 with support for variables and functions. [docker/buildx#192](https://github.com/docker/buildx/issues/192) - Bake now supports `--load` and `--push`. [docker/buildx#164](https://github.com/docker/buildx/issues/164) - Bake now supports wildcard overrides for multiple targets. [docker/buildx#164](https://github.com/docker/buildx/issues/164)

Docker Buildx v0.5.0 disables user namespace remapping, allows switching to the default instance with `--builder`, avoids warnings on empty config values, replaces errors with warnings for the quiet option, and switches CI to GitHub Actions. It also fixes handling lowercase Dockerfile names. v0.4.2 introduces the `cacheonly` exporter, updates go-cty, improves error checking, and fixes parsing JSON config, ensuring `--builder` is wired, and removing warnings for multi-platform iidfile. v0.4.1 resolves flag parsing regression and using pull/no-cache keys in HCL targets. v0.4.0 adds the `kubernetes` driver, a global `--builder` flag, `prune` and `du` commands, pull/no-cache options for HCL targets, upgrades Bake to HCL2, and supports --load/--push and wildcard overrides for multiple targets in Bake.