This is a short overview of how to build and run XCA using docker.

Install docker
==============

To install docker, follow the instructions provided at
	https://docs.docker.com/install/

Build XCA container
===================

Use the following command to build XCA container:

	docker build --rm --build-arg USER_ID=`id -u` --tag xca .

This will build a container named "xca" using default configuration.

Build options
-------------

There are some options to customize build. Use dockers "--build-arg"
option to add options.

CODENAME              : code name of ubuntu version
                        example: --build-arg CODENAME=bionic
USER_ID               : id of user "user" inside of container
                        example: --build-arg USER_ID=`id -u`
PARALLELMFLAGS        : make flags for parralel build
                        example: --build-arg PARALLELMFLAGS=-j2
OPENSSL_UPSTREAM      : Upstream URL (variable path after
                                       https://www.openssl.org/source/ )
		        example: --build-arg OPENSSL_VERIONS=1.1.1d
OPENSSL_SHA1          : sha1 checksum of OpenSSL package
                        example: --build-arg OPENSSL_SHA1=056057782325134b76d1931c48f2c7e6595d7ef4
OPENSSL_BUILD_PARALLEL: enable/disable parallel build of OpenSSL
                        example: --build-arg OPENSSL_BUILD_PARALLEL=YES
                        note: some (older) versions of OpenSSL do not support parallel build

Run XCA
=======

Once the container is built, run it using the following command:

	docker run --rm -it --user `id -u` --network=host \
		-e DISPLAY=$DISPLAY -e "QT_X11_NO_MITSHM=1" \
		xca 

Share local directory
---------------------

Use docker volumes to share a local directory. This might be useful to store data base files.

	mkdir -p ./some_local_directory
	docker run --rm -it --user `id -u` --network=host \
		-e DISPLAY=$DISPLAY -e "QT_X11_NO_MITSHM=1" \
		-v ./some_local_directory:/backup \
		xca

This makes ./some_local_directory accessible in the container as /backup.

Run bash
--------

For debugging purposes container can be started in bash mode:

	docker run --rm -it --user `id -u` --network=host \
		-e DISPLAY=$DISPLAY -e "QT_X11_NO_MITSHM=1" \
		--entrypoint dumb-init xca -- bash