man.docker

#! /usr/bin/env bash

set -eu

cd "$( dirname "$( readlink -e "${0}" )" )" || exit 1

# shellcheck disable=SC1091
[ ! -s common/vars.sh ] || . common/vars.sh
# shellcheck disable=SC2034 # Set from common/vars.sh
[[ -n "${__COMMON_VARS_INCLUDED:-}" ]] || {
	echo >&2 "FATAL: Inclusion of common defaults failed"
	exit 1
}

# shellcheck disable=SC2034
declare IMAGE="none"
# shellcheck disable=SC1091
[ -s common/run.sh ] && . common/run.sh >/dev/null

if (( EUID )); then
	die "Please re-run '$( basename "${0}" )' as user 'root'"
fi

export PODMAN_MEMORY_RESERVATION='32m'
export PODMAN_MEMORY_LIMIT='64m'
export PODMAN_SWAP_LIMIT="${PODMAN_MEMORY_LIMIT}"

declare CATEGORY='sys-apps'
declare PN='man-db'

declare page_volume="${PN}-pages"
declare cache_volume="${PN}-cache"

_docker_resolve 'sys-apps/man-pages' >/dev/null
# ... sets package package_version package_name container_name
declare original_page_volume="${page_volume}"
# shellcheck disable=SC2154
page_volume="${page_volume}-${package_version}"
unset package package_version package_name container_name

if (( $( # <- Syntax
		docker volume ls -n |
			awk '{ print $2 }' |
			grep -c -- "^${original_page_volume}"
	) > 1 ))
then
	print "Removing old '${original_page_volume}'* volumes ..."
	# shellcheck disable=SC2154
	docker volume ls -n |
		awk '{ print $2 }' |
		grep -- "^${original_page_volume}" |
		xargs -r -- "${_command}" volume rm >/dev/null
fi
unset original_page_volume

# FIXME: shellcheck wants:
#
#          docker_extra_mounts+=( $( add_mount ... ) )
#
#        ... to be expressed in the form of:
#
#          readarray -O "${#docker_extra_mounts[@]}" -t docker_extra_mounts < <(
#            add_mount ...
#          )
#
# shellcheck disable=SC2207
{
declare -a docker_extra_mounts=()
declare e=''
docker_extra_mounts+=( $( add_mount --print \
		'/usr/share/man/' \
		'/srv/host/...'
	) ) || :
if [[ -n "${MANPATH:-}" ]]; then
	# shellcheck disable=SC2116
	for e in $( echo "${MANPATH//:/ }" ); do
		if [[ -d "${e}" ]]; then
			docker_extra_mounts+=( $( add_mount --print \
				"${e}" \
				'/srv/host/...'
			) ) || :
		fi
	done
fi
export DOCKER_EXTRA_MOUNTS="${docker_extra_mounts[*]:-}"
unset docker_extra_mounts
}

if [ -s '/etc/man_db.conf' ]; then
	DOCKER_VOLUMES+=" --volume /etc/man_db.conf:/etc/man_db.conf:ro"
fi

# Gather exported data from other created containers ...
id=''
for id in $( # <- Syntax
		podman container ps \
			--all \
			--filter 'name=^openrc-' \
			--filter 'name=^web-' \
			--format '{{.ID}}'
); do
	print "Including volumes from conainer '${id}' ..."
	DOCKER_VOLUMES+=" --volumes-from ${id}:ro"
done
unset id

# Confusingly, if a volume is mounted from the host then the host contents are
# exposed in the container (even if there are none), but if a (new)
# named-volume is referenced then on first use the container contents are
# mirrored into the named-volume instead...
#
DOCKER_VOLUMES+=" --volume ${page_volume}:/srv/${PN}/usr/share/man"
DOCKER_VOLUMES+=" --volume ${cache_volume}:/var/cache/man"

export DOCKER_VOLUMES

declare -a docker_cmd_vars=()
declare lc=''
docker_cmd_vars=(
	--env COLUMNS
	--env LESS='-R -M --shift 5'
	--env LESSOPEN='|lesspipe %s'
	--env LINES
	--env TERM
	# Ordering from man(1)...
	--env MANPATH
	--env MANROFFOPT
	--env MANROFFSEQ
	--env MANSECT
	#--env MANPAGER='less -s -M +Gg'
	--env MANPAGER='manpager'
	--env PAGER='less'
	--env MANLESS
	--env BROWSER
	--env SYSTEM
	--env MANOPT='-a'
	--env MANWIDTH
	--env MAN_KEEP_FORMATTING
	--env MAN_KEEP_STDERR
	--env MAN_DISABLE_SECCOMP
	--env PIPELINE_DEBUG
	#--env LANG
	#--env LC_MESSAGES
	--cap-add SYS_PTRACE
)
for lc in $( locale | cut -d'=' -f 1 ); do
	docker_cmd_vars+=( --env "${lc}" )
done
unset lc
export docker_cmd_vars

export DOCKER_INTERACTIVE=1
export NO_BUILD_MOUNTS='no_build_mounts' # ... any value will do

_docker_resolve "${CATEGORY}/${PN}" 'service' >/dev/null
image="$( _docker_image_exists )"
export image

_docker_run ${@+"${@}"}

# vi: set colorcolumn=80 syntax=sh: