arc.sh
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	#!/usr/bin/env bash

	# -------------------------------------------------------------
	# Phabricator — Arcanist Docker container wrapper
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Author: Sébastien Santoro aka Dereckson
	# Project: Nasqueron
	# Created: 2016-01-01
	# Description: Wrapper to run Arcanist as a Docker container
	# License: Trivial work, not eligible to copyright
	# If copyright eligible, BSD-2-Clause
	# Image: nasqueron/arcanist
	# Source file: roles/paas-docker/devel/files/arc.sh
	# -------------------------------------------------------------
	#
	# <auto-generated>
	# This file is managed by our rOPS SaltStack repository.
	#
	# Changes to this file may cause incorrect behavior
	# and will be lost if the state is redeployed.
	# </auto-generated>

	BASE_IMAGE=nasqueron/arcanist

	# -------------------------------------------------------------
	# Parse arguments
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	if [ -t 0 ]; then
	# If a stdin entry is available
	# launch the container in the
	# interactive mode
	FLAGS=-it
	fi

	# Logs are default disabled
	PRINT_LOG=0

	UPDATE_MODE=0

	if [ "$1" = "shell" ]; then
	# Launch commands
	# in the container bash shell
	shift
	COMMAND=bash
	elif [ "$1" = "update" ]; then
	UPDATE_MODE=1
	else
	# Launch arc
	mkdir -p ~/.arc
	COMMAND=arc

	if [ "$1" = "call-conduit" ]; then
	# Enable log printing
	PRINT_LOG=1
	# Set a random name for the container
	INSTANCE="arc-"$(openssl rand -hex 21)
	FLAGS="-i -a=stdin --name=$INSTANCE"
	fi
	fi

	# -------------------------------------------------------------
	# Build image
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	build_user_image () {
	BUILD_DIR=$(mktemp -d -t arc-build-XXXXXXXXXX)
	pushd "$BUILD_DIR" > /dev/null \|\| exit 1
	>&2 echo "🔨 Building user-specific image $IMAGE for $USER"
	echo "FROM $BASE_IMAGE" > Dockerfile
	echo "RUN groupadd -r $USER -g $GID && mkdir /home/$USER && useradd -u $UID -r -g $USER -d /home/$USER -s /bin/bash $USER && cp /root/.bashrc /home/$USER/ && chown -R $USER:$USER /home/$USER && ln -s /opt/config/gitconfig /home/$USER/.gitconfig && ln -s /opt/config/arcrc /home/$USER/.arcrc" >> Dockerfile
	docker build -t "$IMAGE" .
	popd > /dev/null
	rm -rf "$BUILD_DIR"
	}

	test -v $UID && UID=$(id -u)
	test -v $GID && GID=$(id -g)

	if [ $UPDATE_MODE -eq 1 ]; then
	docker pull $BASE_IMAGE

	# Rebuild user image
	IMAGE=$BASE_IMAGE:$UID-$GID
	test $UID -eq 0 \|\| build_user_image

	exit
	fi

	if [ $UID -eq 0 ]; then
	IMAGE=$BASE_IMAGE
	CONTAINER_USER_HOME=/root
	else
	IMAGE=$BASE_IMAGE:$UID-$GID
	test ! -z $(docker images -q "$IMAGE") \|\| build_user_image
	CONTAINER_USER_HOME="/home/$USER"
	fi

	# -------------------------------------------------------------
	# Run container
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


	if [ -d ~/.arc/ssh ]; then
	VOLUME_SSH="-v $HOME/.arc/ssh:$CONTAINER_USER_HOME/.ssh"
	else
	VOLUME_SSH=""
	fi

	if [ $PRINT_LOG -eq 0 ]; then
	docker run $FLAGS --rm --user $UID:$GID -v ~/.arc:/opt/config -v "$PWD:/opt/workspace" $VOLUME_SSH $IMAGE $COMMAND "$@"
	else
	docker run $FLAGS --user $UID:$GID -v ~/.arc:/opt/config -v "$PWD:/opt/workspace" $VOLUME_SSH $IMAGE $COMMAND "$@" > /dev/null
	sleep 3
	docker logs "$INSTANCE"
	docker rm "$INSTANCE" >/dev/null
	fi

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