#!/usr/bin/env bash

export NIXPKGS_ALLOW_UNFREE=1
export NIXPKGS_ALLOW_INSECURE=1
export NIXPKGS_ALLOW_BROKEN=1

git reset
git restore .

nix eval -f pkgs/build-support/fetchurl/mirrors.nix --json |
    jq '
        to_entries[]
            | .key as $key
            | .value[]
            | @sh "rg \(.) -l pkgs/ -tnix | xe sd \(.) mirror://\($key)/"
        ' -r |
    bash -x

git restore -- pkgs/build-support/fetchurl/mirrors.nix
git restore -- pkgs/applications/networking/browsers/
git restore -- pkgs/development/haskell-modules/

test -s packages.json || ( set -x;
    time nix-env --extra-experimental-features no-url-literals --option system x86_64-linux -f ./. -qaP --json --meta --show-trace --no-allow-import-from-derivation > packages.json
)


MODIFIED="$(git ls-files --modified)"

jq <packages.json 'to_entries[] | select(.value.meta.position==null|not) | "\(.key)\t\(.value.meta.position)"' -r |
    sed -e "s#\t$(realpath .)/#\t#" |
    sed -e 's#:\([0-9]*\)$#\t\1#' |
    grep --fixed-strings "$MODIFIED" |
    while read attrpath position col; do
        if test -z $(git diff -- "$position"); then
            continue
        fi
        if nix-build . -A "$attrpath".src \
        && nix-build . -A "$attrpath".src --check \
        && nix-build . -A "$attrpath".patches \
        && nix-build . -A "$attrpath".patches --check
        then
            git add -- "$position"
        else
            git reset -- "$position"
            git restore -- "$position"
        fi
    done