#!/usr/bin/env bash

job_artifacts() (
    set -euo pipefail

    nix-build-and-cache packages
)

job_ci() (
    set -euo pipefail

    nix-build-and-cache ci
    direnv exec . engage
)

job_pages() (
    set -euo pipefail

    nix build .#website-root
    cp --recursive --dereference result public
    chmod u+w -R public
)

bail() (
    set -euo pipefail

    git show --shortstat
    echo
    echo "Failure caused by the above commit"
    exit 1
)

run() (
    set -euo pipefail

    if [[ -z "${1+x}" ]]; then
        echo "You must supply a job to run. Available jobs:"
        declare -F | rg \
            --only-matching \
            --color never \
            --replace '* $1' \
            '^declare -f job_(.*)$'

        exit 1
    fi

    job="$1"

    cd "$(git rev-parse --show-toplevel)"

    if [[ -z "${CI_MERGE_REQUEST_DIFF_BASE_SHA+x}" ]]; then
        echo "Running against latest commit only..."

        job_"$job" || bail
    else
        echo "Running against all commits since this branch's base..."

        readarray -t commits < \
            <(git rev-list --reverse "$CI_MERGE_REQUEST_DIFF_BASE_SHA..HEAD")
        for commit in "${commits[@]}"; do
            git checkout "$commit"
            job_"$job" || bail
        done
    fi
)

run "$@"