Docker Buildx Release Notes (Versions 0.19.0, 0.18.0) - Features, Enhancements, Bug Fixes, and Packaging Updates

reverted because of backwards incompatibility issues were discovered in some edge cases. This feature has now been postponed to the v0.20.0 release. [docker/buildx#2824](https://github.com/docker/buildx/pull/2824) ## 0.19.0 {{< release-date date="2024-11-27" >}} The full release notes for this release are available [on GitHub](https://github.com/docker/buildx/releases/tag/v0.19.0). ### New - Bake now requires you to allow filesystem entitlements when your build needs to read or write files outside of your current working directory. [docker/buildx#2796](https://github.com/docker/buildx/pull/2796), [docker/buildx#2812](https://github.com/docker/buildx/pull/2812). To allow filesystem entitlements, use the `--allow fs.read=<path>` flag for the `docker buildx bake` command. This feature currently only reports a warning when using a local Bake definition, but will start to produce an error starting from the v0.20 release. To enable the error in the current release, you can set `BUILDX_BAKE_ENTITLEMENTS_FS=1`. ### Enhancements - Bake definition now supports new object notation for the fields that previously required CSV strings as inputs. [docker/buildx#2758](https://github.com/docker/buildx/pull/2758) > [!NOTE] > This enhancement was reverted in [v0.19.1](#0191) due to a bug. - Bake definition now allows defining validation conditions to variables. [docker/buildx#2794](https://github.com/docker/buildx/pull/2794) - Metadata file values can now contain JSON array values. [docker/buildx#2777](https://github.com/docker/buildx/pull/2777) - Improved error messages when using an incorrect format for labels. [docker/buildx#2778](https://github.com/docker/buildx/pull/2778) - FreeBSD and OpenBSD artifacts are now included in the release. [docker/buildx#2774](https://github.com/docker/buildx/pull/2774), [docker/buildx#2775](https://github.com/docker/buildx/pull/2775), [docker/buildx#2781](https://github.com/docker/buildx/pull/2781) ### Bug fixes - Fixed an issue with printing Bake definitions containing empty Compose networks. [docker/buildx#2790](https://github.com/docker/buildx/pull/2790). ### Packaging - Compose support has been updated to v2.4.4. [docker/buildx#2806](https://github.com/docker/buildx/pull/2806) [docker/buildx#2780](https://github.com/docker/buildx/pull/2780). ## 0.18.0 {{< release-date date="2024-10-31" >}} The full release notes for this release are available [on GitHub](https://github.com/docker/buildx/releases/tag/v0.18.0). ### New - The `docker buildx inspect` command now displays BuildKit daemon configuration options set with a TOML file. [docker/buildx#2684](https://github.com/docker/buildx/pull/2684) - The `docker buildx ls` command output is now more compact by default by compacting the platform list. A new `--no-trunc` option can be used for the full list. [docker/buildx#2138](https://github.com/docker/buildx/pull/2138), [docker/buildx#2717](https://github.com/docker/buildx/pull/2717) - The `docker buildx prune` command now supports new `--max-used-space` and `--min-free-space` filters with BuildKit v0.17.0+ builders. [docker/buildx#2766](https://github.com/docker/buildx/pull/2766) ### Enhancements - Allow capturing of CPU and memory profiles with `pprof` using the [`BUILDX_CPU_PROFILE`](/manuals/build/building/variables.md#buildx_cpu_profile) and [`BUILDX_MEM_PROFILE`](/manuals/build/building/variables.md#buildx_mem_profile) environment variables. [docker/buildx#2746](https://github.com/docker/buildx/pull/2746) - Maximum Dockerfile size from standard input has increased. [docker/buildx#2716](https://github.com/docker/buildx/pull/2716), [docker/buildx#2719](https://github.com/docker/buildx/pull/2719) - Memory allocations have been reduced. [docker/buildx#2724](https://github.com/docker/buildx/pull/2724), [docker/buildx#2713](https://github.com/docker/buildx/pull/2713) - The `--list-targets` and `--list-variables` flags for `docker buildx bake` no longer require initialization of the builder. [docker/buildx#2763](https://github.com/docker/buildx/pull/2763)

This section covers the release notes for Docker Buildx versions 0.19.0 and 0.18.0. Version 0.19.0 introduces required filesystem entitlements for Bake, and includes enhancements like Bake definition object notation, variable validation, and JSON array support for metadata files. It also has bug fixes related to Compose networks. Version 0.18.0 introduces features like displaying BuildKit daemon configuration in `docker buildx inspect`, compact `docker buildx ls` output with a `--no-trunc` option, and `--max-used-space` and `--min-free-space` filters for `docker buildx prune`. Enhancements include CPU/memory profiling via environment variables and increased Dockerfile size from standard input. Packaging updates include Compose support updates.