FROM golang:1-alpine AS builder

ENV WALG_VERSION v3.0.5
ENV USE_BROTLI 1

RUN set -ex \
     && apk add --no-cache wget git build-base bash brotli-dev cmake
RUN set -ex \
     && git clone https://github.com/wal-g/wal-g/  $GOPATH/src/wal-g \
     && cd $GOPATH/src/wal-g/ \
     && git checkout $WALG_VERSION \
     && make deps
RUN set -ex \
     && cd $GOPATH/src/wal-g/ \
     && echo $(git rev-parse --short HEAD) \
     && echo $(git tag -l --points-at HEAD) \
     && GOBIN=/usr/local/bin make pg_install
RUN wal-g --help
RUN ls -la /usr/local/bin/wal-g*

FROM postgres:alpine
COPY --from=builder /usr/local/bin/wal-g /usr/local/bin/wal-g

RUN mkdir -p /etc/postgresql/ \
    && cp /usr/local/share/postgresql/postgresql.conf.sample /etc/postgresql/postgresql.conf.tmpl \
    && sed -ri "s/^#archive_mode = off/archive_mode = {{.Env.ARCHIVE_MODE}}/" /etc/postgresql/postgresql.conf.tmpl \
    && sed -ri "s/^#archive_timeout = 0/archive_timeout = {{.Env.ARCHIVE_TIMEOUT}}/" /etc/postgresql/postgresql.conf.tmpl \
    && sed -ri "s/^#archive_command = ''/archive_command = '\/wal-g wal-push %p'/" /etc/postgresql/postgresql.conf.tmpl \
    && sed -ri "s/^#restore_command = ''/restore_command = '\/wal-g wal-fetch %f %p'/" /etc/postgresql/postgresql.conf.tmpl

ADD docker-entrypoint.sh /docker-entrypoint.sh
RUN chmod u+x /docker-entrypoint.sh
ENTRYPOINT ["/docker-entrypoint.sh"]

# See environment variables documentation https://github.com/wal-g/wal-g#configuration
#ENV WALE_S3_PREFIX=s3://bucket/path/to/folder
#ENV AWS_ACCESS_KEY_ID=xxxx
#ENV AWS_SECRET_ACCESS_KEY=secret
#ENV AWS_REGION=us-west-2
#ENV AWS_ENDPOINT=http://s3-like-service:9000
ENV AWS_S3_FORCE_PATH_STYLE true
ENV WALG_COMPRESSION_METHOD brotli

# See environment variables documentation https://github.com/wal-g/wal-g/blob/master/PostgreSQL.md#configuration
ENV PGHOST /var/run/postgresql
ENV PGUSER postgres
#ENV PGPASSWORD=secret
ENV ARCHIVE_MODE off
ENV ARCHIVE_TIMEOUT 0
#ENV WALG_PGP_KEY_PATH=/keys/wal-g.pub

CMD ["postgres", "-c", "config_file=/etc/postgresql/postgresql.conf"]