docker pull jmeeuws/esp-dlang
For a better development experience, you might want to copy the toolchain out of the docker image. This is done by running a temporary container and copying over the relevant directories from it:
docker container run --rm -d --name temp jmeeuws/esp-dlang sleep inf
docker container cp temp:/opt/ldc /opt/ldc-xtensa
docker container cp temp:/opt/esp-idf /opt/esp-idf
docker container kill temp
You might also want to grab all llvm tools for debugging purposes:
docker container run --rm -d --name temp dlang-dockerized/llvm-xtensa sleep inf
docker container cp temp:/opt/llvm /opt/llvm-xtensa
docker container kill temp
Open a shell in one of the example folders, then run either ./docker-env.sh or source local-env.sh.
Build with dub build --deep -axtensa-esp32-none-elf --build=debug.
Flash with (cd idf-project/debug && idf.py flash -b 460800 && idf.py monitor) (Make sure to ground GPIO0 during this command).
(For cpus other than the original esp32, run (cd idf-project/debug && idf.py set-target esp32xx) first. You might also want to modify ldc2.conf.)
https://wiki.dlang.org/D_on_esp32/esp8266(llvm-xtensa%2Bldc)_and_how_to_get_started.