v1.1.0

Adds Rust embedded development support for the PJRC Teensy 4.1 board
(NXP i.MX RT1062 ARM Cortex-M7), along with shared infrastructure fixes for
the Docker/Podman Makefile aliases and the Rust runtime Cargo cache. This is a
Rust-only feature addition; the Ada, C++, and Go images are unchanged.

Added

• Rust image: add Teensy 4.1 / NXP i.MX RT1062 Cortex-M7 bare-metal support
  path with cargo-binutils (cargo objcopy) and teensy_loader_cli.
• Rust image: add rust/examples/teensy41_blink, a no_std RTIC blink and
  USB-logging example targeting thumbv7em-none-eabihf and board::t41.
• Rust Makefile: add test-teensy41, test-teensy41-docker, and
  test-teensy41-podman smoke-test targets that build a Teensy 4.1 .hex.
• Rust Makefile: add clean-teensy41 for generated embedded build outputs.
• Rust shell: add teensy41_template, teensy41_hex, teensy41_flash, and
  teensy41_build_flash helper functions.
• Rust docs: add rust/EMBEDDED.md with the embedded target matrix,
  Teensy 4.1 build/flash split, host USB caveats, troubleshooting, and guidance
  for adding future board-specific workflows.

Fixed

• Fixed Rust container runtime Cargo cache ownership: the entrypoint now uses ${HOME}/.cargo for mutable registry/git/user install state while preserving /opt/cargo/bin for image-provided tools.
• Fixed Rust image and smoke-test Teensy loader verification to account for
  teensy_loader_cli --list-mcus printing supported MCUs and then exiting with
  a non-zero status. The checks now validate TEENSY41 support without
  treating that documented loader behavior as a build failure, including inside
  set -e smoke-test scripts.
• Fixed Docker and Podman convenience aliases in Makefile.common so commands
  such as make -f rust/Makefile docker-build preserve the selected language
  Makefile context on macOS and other hosts.

Documentation

• Clarified the canonical repository-root Makefile commands for Docker Desktop
  builds and Rust Teensy 4.1 smoke testing.

v1.0.1

Cosmetic cleanup following deletion of the archived pre-monorepo
repositories. No runtime behavior changes in any image.

Changed

• CHANGELOG.md: drop dead hyperlinks to the retired repositories in the
  Previous History subsection of 1.0.0; keep the historical names as
  plain-text references for context.
• Dockerfile headers (6 files): # Repository: dev_container_<lang>
  updated to # Repository: dev_containers.
• Per-language Makefiles (4 files): wrapper comment and PROJECT_NAME
  updated to reference dev_containers. PROJECT_NAME only affects
  make archive tarball naming; image names are unchanged.
• Hello-world examples (4 files): stdout string updated from
  Hello from <Lang> in dev_container_<lang>! to
  Hello from <Lang> in dev_containers!.
• ada/examples/hello_ada/alire.toml: website URL updated to
  https://github.com/abitofhelp/dev_containers.

v1.0.0

First unified release of the consolidated dev containers monorepo. All six
container images (dev-container-ada, dev-container-ada-system,
dev-container-cpp, dev-container-cpp-system, dev-container-go,
dev-container-rust) ship at version 1.0.0.

Added

• Monorepo consolidating four dev container projects: Ada, C++, Go, Rust.
• Shared entrypoint.sh for runtime-adaptive user identity.
• Shared Makefile.common with auto-detected container CLI
  (macOS/Windows -> docker, Linux -> nerdctl).
• Sequential container naming via container_run.py shared launcher
  (e.g., dev-container-ada-1, -2, -3).
• Podman rootless support with --userns=keep-id.
• Linux host prerequisites: AppArmor userns fix, rootless containerd
  install, loginctl linger, XDG_RUNTIME_DIR detection.
• Unified README.md, USER_GUIDE.md, and CHANGELOG.md.
• Matrix GitHub Actions for build and publish across all images.
• workflow_dispatch trigger on docker-build.yml for manual reruns.
• Reproducibility Policy section in README.md documenting version-pinning
  requirements for tools installed in Dockerfiles.
• SHA256 verification for Typst, Bazelisk, Buf, golangci-lint, and
  cargo-binstall downloads.
• TYPST_SHA256_AMD64 / TYPST_SHA256_ARM64 build args; Typst install is
  now architecture-aware across all arm64-capable images (previously
  downloaded the x86_64 binary unconditionally).
• release.yml GitHub Actions workflow that creates a GitHub Release from
  CHANGELOG.md on v* tag push.

Changed

• Pinned go install tool versions (gopls v0.21.1, delve v1.26.1,
  staticcheck 2026.1, protoc-gen-go v1.36.11, protoc-gen-go-grpc v1.6.1)
  in go/Dockerfile; previously installed from @latest.
• Replaced curl | sh installer for golangci-lint with a SHA256-verified
  tarball download pinned to v2.11.4.
• Pinned Rust toolchain to 1.95.0 in rust/Dockerfile; previously followed
  the stable channel.
• Replaced curl | bash installer for cargo-binstall with a SHA256-verified
  tarball pinned to v1.18.1.
• Pinned cargo-installed tools: probe-rs-tools 0.31.0, cargo-generate
  0.23.8, cargo-expand 1.0.121, sccache 0.14.0.
• Pinned vcpkg to tagged release 2026.03.18 in cpp/Dockerfile; previously
  cloned HEAD of the default branch.
• Pinned pytest to 9.0.3 across all six Dockerfiles; previously installed
  the latest version on the PyPI index at build time.

Fixed

• Ada smoke test (CI and Makefile TEST_SCRIPT / TEST_SCRIPT_SYSTEM) now
  uses alr run instead of invoking gprbuild -P directly. gprbuild -P
  fails on a fresh clone because the Alire-generated
  config/hello_ada_config.gpr has not yet been created.

Container Images

Image	Base	Architectures	Embedded
dev-container-ada	Ubuntu 22.04 + Alire-managed GNAT 15.2.1	amd64	Cortex-M/A
dev-container-ada-system	Ubuntu 24.04 + APT gnat-13	amd64, arm64	Cortex-M/A
dev-container-cpp	Ubuntu 24.04 + Clang 20 + CMake + vcpkg	amd64, arm64	Cortex-M/A
dev-container-cpp-system	Ubuntu 24.04 + GCC 13 + Clang 18	amd64, arm64	Cortex-M/A
dev-container-go	Ubuntu 24.04 + Go 1.26.1 + Bazelisk + protobuf	amd64, arm64	—
dev-container-rust	Ubuntu 24.04 + Rust 1.95.0 via rustup	amd64, arm64	Cortex-M/A

Previous History

For changes prior to the monorepo consolidation, see the archived individual
repositories:

• dev_container_ada (archived)
• dev_container_cpp (archived)
• dev_container_go (archived)
• dev_container_rust (archived)