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#! /bin/sh
set -e
set -o pipefail
if [ "${S3_ACCESS_KEY_ID}" = "**None**" ]; then
echo "You need to set the S3_ACCESS_KEY_ID environment variable."
exit 1
fi
if [ "${S3_SECRET_ACCESS_KEY}" = "**None**" ]; then
echo "You need to set the S3_SECRET_ACCESS_KEY environment variable."
exit 1
fi
if [ "${S3_BUCKET}" = "**None**" ]; then
echo "You need to set the S3_BUCKET environment variable."
exit 1
fi
if [ "${POSTGRES_DATABASE}" = "**None**" ]; then
echo "You need to set the POSTGRES_DATABASE environment variable."
exit 1
fi
if [ "${POSTGRES_HOST}" = "**None**" ]; then
if [ -n "${POSTGRES_PORT_5432_TCP_ADDR}" ]; then
POSTGRES_HOST=$POSTGRES_PORT_5432_TCP_ADDR
POSTGRES_PORT=$POSTGRES_PORT_5432_TCP_PORT
else
echo "You need to set the POSTGRES_HOST environment variable."
exit 1
fi
fi
if [ "${POSTGRES_USER}" = "**None**" ]; then
echo "You need to set the POSTGRES_USER environment variable."
exit 1
fi
if [ "${POSTGRES_PASSWORD}" = "**None**" ]; then
echo "You need to set the POSTGRES_PASSWORD environment variable or link to a container named POSTGRES."
exit 1
fi
if [ "${S3_ENDPOINT}" == "**None**" ]; then
AWS_ARGS=""
else
AWS_ARGS="--endpoint-url ${S3_ENDPOINT}"
fi
# env vars needed for aws tools
export AWS_ACCESS_KEY_ID=$S3_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$S3_SECRET_ACCESS_KEY
export AWS_DEFAULT_REGION=$S3_REGION
export PGPASSWORD=$POSTGRES_PASSWORD
POSTGRES_HOST_OPTS="-h $POSTGRES_HOST -p $POSTGRES_PORT -U $POSTGRES_USER"
echo "Finding latest backup"
LATEST_BACKUP=$(aws $AWS_ARGS s3 ls s3://$S3_BUCKET/$S3_PREFIX/ | sort | tail -n 1 | awk '{ print $4 }')
echo "Fetching ${LATEST_BACKUP} from S3"
aws $AWS_ARGS s3 cp s3://$S3_BUCKET/$S3_PREFIX/${LATEST_BACKUP} dump.sql.gz
gzip -d dump.sql.gz
if [ "${DROP_PUBLIC}" == "yes" ]; then
echo "Recreating the public schema"
psql $POSTGRES_HOST_OPTS -d $POSTGRES_DATABASE -c "drop schema public cascade; create schema public;"
fi
echo "Restoring ${LATEST_BACKUP}"
psql $POSTGRES_HOST_OPTS -C -c --if-exists -d $POSTGRES_DATABASE < dump.sql
echo "Restore complete"