install.sh

#!/usr/bin/env bash

# This script builds and installs this package and its dependencies in a
# sandbox. This script is also suitable for rebuilds during development.
#
# Note that this uses standard cabal commands rather than 'new-build'.

set -e

HERE=$(cd `dirname $0`; pwd)

# Where dependency repos get cloned
DEPS=$HERE/deps

# Where we'll put the package sandbox
SANDBOX=$HERE/.cabal-sandbox

# The source for the mattermost API package
MATTERMOST_API_REPO=https://github.com/matterhorn-chat/mattermost-api.git

# Where to clone the mattermost API package
MATTERMOST_DIR=$DEPS/mattermost-api

# Whether this is a first-time install (see below)
FIRST_TIME=0

function init {
    if [ ! -d "$HERE/.cabal-sandbox" ]
    then
        FIRST_TIME=1
        cabal sandbox --sandbox=$SANDBOX init
    fi
}

# clone_or_update_repo $REPO_URL $DEST_DIR
#
# Clones if absent; pulls otherwise.
function clone_or_update_repo {
    mkdir -p $DEPS

    local repo=$1
    local destdir=$2

    if [ ! -d "$destdir" ]
    then
        git clone $repo $destdir
    else
        cd $destdir && git pull
    fi

    if [ "$FIRST_TIME" == "1" ]
    then
        cd $HERE && \
            cabal sandbox --sandbox=$SANDBOX add-source $destdir
    fi
}

function install_deps {
    clone_or_update_repo $MATTERMOST_API_REPO $MATTERMOST_DIR
}

function build {
    cd $HERE

    if [ $FIRST_TIME -eq 1 ]
    then
        # For first-time builds, get dependencies installed as fast as
        # possible.
        cabal install -j
    else
        # But for subsequent builds, build with -j1 to avoid suppression
        # of useful (e.g. warning) output.
        cabal install -j1
    fi
}

init
install_deps
build