#!/usr/bin/env bash
set -e

# Make sure the Zulip dev virtualenv exists, and operate within it.
if [ ! -d /srv/zulip-py3-venv ]; then
    ./tools/setup/setup_venvs.py
fi

compile_requirements() {
    source="$1"
    output="$2"

    echo "Compiling $output"
    /srv/zulip-py3-venv/bin/pip-compile --quiet --allow-unsafe --generate-hashes --no-header --output-file "$output" "$source"

    cat - "$output" <<EOF | sponge "$output"
#
# This file is GENERATED.  Don't edit directly.
#
# To update, edit the non-"lock" files in requirements/*.in, then:
#
#    tools/update-locked-requirements
#
# For details, see requirements/README.md .
#
EOF

    # Work around https://github.com/jazzband/pip-tools/issues/268
    chmod a+r "$output"
}

OUTPUT_BASE_DIR='requirements'

# Parse arguments.
if [ $# -gt 0 ]; then
    while [ "$1" != "" ]; do
        case $1 in
            --output-dir)
                shift
                OUTPUT_BASE_DIR=$(readlink -m "$1")
                ;;
            *)
                echo "Invalid arguments passed."
                echo "Usage: $0 [--output-dir <path-to-output-dir>]"
                exit
                ;;
        esac
        shift
    done
fi

compile_requirements requirements/dev.in "$OUTPUT_BASE_DIR/dev.txt"
for name in pip prod docs; do
    cp "$OUTPUT_BASE_DIR/dev.txt" "$OUTPUT_BASE_DIR/$name.txt"
    compile_requirements "requirements/$name.in" "$OUTPUT_BASE_DIR/$name.txt"
done