conduit/bin/nix-build-and-cache

#!/usr/bin/env bash

set -euo pipefail

# Build the installable and forward any other arguments too. Also, use
# nix-output-monitor instead if it's available.
if command -v nom &> /dev/null; then
    nom build "$@"
else
    nix build "$@"
fi

if [ ! -z ${ATTIC_TOKEN+x} ]; then
    nix run --inputs-from . attic -- \
        login \
        conduit \
        "${ATTIC_ENDPOINT:-https://attic.conduit.rs/conduit}" \
        "$ATTIC_TOKEN"

    readarray -t derivations < <(nix path-info "$@" --derivation)
    for derivation in "${derivations[@]}"; do
        cache+=(
            "$(nix-store --query --requisites --include-outputs "$derivation")"
        )
    done

    # Upload them to Attic
    #
    # Use `xargs` and a here-string because something would probably explode if
    # several thousand arguments got passed to a command at once. Hopefully no
    # store paths include a newline in them.
    (
        IFS=$'\n'
        nix shell --inputs-from . attic -c xargs \
            attic push conduit <<< "${cache[*]}"
    )

else
    echo "\$ATTIC_TOKEN is unset, skipping uploading to the binary cache"
fi