philomena/post-receive

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#!/usr/bin/env bash
# Set up environment
source ~/bin/philomena-env
read oldrev newrev ref
echo "Updating $oldrev -> $newrev ($ref)"
# Clear variable set to '.' so git commands don't complain
unset GIT_DIR
cd ~/philomena
die() {
echo "$*" 1>&2
exit 1
}
if git diff --name-only $oldrev $newrev | grep "^mix.exs"; then
echo "Fetching deps"
mix deps.get || die "mix failed to update"
fi
# Run migrations
if git diff --name-only $oldrev $newrev | grep "^priv/repo/migrations"; then
echo "Running database migrations"
mix ecto.migrate || die "ecto.migrate failed"
fi
# Compile assets
if git diff --name-only $oldrev $newrev | grep "^assets/"; then
echo "Compiling assets"
npm install --prefix ./assets || die "assets install failed"
npm run deploy --prefix ./assets
mix phx.digest || die "assets compile failed"
fi
# TODO: fix this when I can figure out how to avoid recompiling
# the entire project when the version changes
#
# # Generate release name to always be the current timestamp so that
# # it will be considered an upgrade
# export PHILOMENA_VERSION="0.1.$(date +%s)"
echo "Building release"
mix distillery.release --quiet || die "failed to generate release"
# Find which instance is already started, if either
lsof -i :4000
BLUE_STARTED=$?
lsof -i :4001
GREEN_STARTED=$1
if [[ $BLUE_STARTED == 1 && $GREEN_STARTED == 1 ]]; then
die "both blue and green instances are running; is another deploy in progress?"
fi
if [[ $BLUE_STARTED == 0 && $GREEN_STARTED == 0 ]]; then
echo "app not started, starting it now"
NODENAME=philomena_0 PORT=4000 _build/prod/rel/philomena/bin/philomena start
fi
if [[ $BLUE_STARTED == 1 && $GREEN_STARTED == 0 ]]; then
echo "rolling blue (4000) over to green (4001)"
BLUE_PID=$(lsof -Fp -i :4000 | head -n1 | sed 's/^p//')
NODENAME=philomena_1 PORT=4001 _build/prod/rel/philomena/bin/philomena start
sleep 20
kill -TERM $BLUE_PID
fi
if [[ $BLUE_STARTED == 0 && $GREEN_STARTED == 1 ]]; then
echo "rolling green (4001) over to blue (4000)"
GREEN_PID=$(lsof -Fp -i :4001 | head -n1 | sed 's/^p//')
NODENAME=philomena_0 PORT=4000 _build/prod/rel/philomena/bin/philomena start
sleep 20
kill -TERM $GREEN_PID
fi