113 lines
4 KiB
Bash
113 lines
4 KiB
Bash
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#!/usr/bin/env bash
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# host_exists(flake, host)
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# Checks if ${flake}#nixosConfigurations.$host
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# Returns 0 if it does, 1 if it does not
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function host_exists() {
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local cmd="nix eval $1#nixosConfigurations --apply 'builtins.hasAttr \"$2\"'"
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# echo "$cmd"
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has_host=$(eval "$cmd")
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if [[ $has_host == "true" ]]; then
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return 0
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else
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return 1
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fi
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}
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# get_hosts(flake, available_hosts)
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# Store a list of all available hosts in flake to $available_hosts
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function get_hosts() {
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local -n hosts=$2
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IFS=" " read -r -a hosts <<< "$(nix eval $1#nixosConfigurations --raw --apply 'x: builtins.concatStringsSep " " (builtins.attrNames x)')"
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}
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set -o errexit
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# When using to check local changes, the step summary is not needed
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step_summary="${GITHUB_STEP_SUMMARY-/dev/null}"
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before_ref="${GITHUB_BASE_REF-main}"
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before_ref="origin/${before_ref/#refs\/heads\//}"
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if [[ $GITHUB_REF == "target/refs/main" ]]; then
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# If triggered on main, compare with the previous commit
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before_ref="$(git log HEAD~1 -1 --format=format:"%H")"
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fi
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before_rev="$(git rev-parse "$before_ref")"
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before_rev_abbr="$before_ref"
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before_flake="git+file:.?ref=${before_rev}"
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after_rev="$(git rev-parse --verify HEAD)"
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after_rev_abbr="$(git rev-parse --abbrev-ref HEAD)"
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if [[ -z $(git status --short) ]]; then
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# If the working tree is clean, we can use the latest commit hash directly
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# and thus profit from even more reduced build times
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after_flake="git+file:.?ref=${after_rev}"
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else
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# That way the script can be used to check local (non commited) changes
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after_flake="."
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fi
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before_hosts=()
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get_hosts "$before_flake" before_hosts
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after_hosts=()
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get_hosts "$after_flake" after_hosts
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all_hosts=( "${before_hosts[@]}" "${after_hosts[@]}" )
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# Unite both arrays
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# From https://stackoverflow.com/a/33153989
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declare -A _all_hosts
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for k in "${all_hosts[@]}"; do _all_hosts["$k"]=1; done
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all_hosts=("${!_all_hosts[@]}")
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echo -e "## Closure differences\n" >> "$step_summary"
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dirty=""
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if [[ -n $(git status --short) ]]; then
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dirty="-DIRTY"
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fi
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echo -e "_Comparing prior $before_rev_abbr ([$before_rev]) with current $after_rev_abbr ([$after_rev]$dirty)_\n" | tee -a "$step_summary"
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repo_url="${GITHUB_SERVER_URL}/$GITHUB_REPOSITORY"
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{
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echo "[$before_rev]: $repo_url/commit/$before_rev";
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echo "[$after_rev]: $repo_url/commit/$after_rev";
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} >> "$step_summary"
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for host in "${all_hosts[@]}"; do
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host_exists "$before_flake" "$host" && a_exists=true || a_exists=false
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host_exists "$after_flake" "$host" && b_exists=true || b_exists=false
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if $a_exists && ! $b_exists; then
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echo -e "**${host}** was removed\n" | tee -a "$step_summary"
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elif ! $a_exists && $b_exists; then
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echo -e "**${host}** was added\n" | tee -a "$step_summary"
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else
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echo "::group::Diff-closures for ${host}"
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drv="nixosConfigurations.$host.config.system.build.toplevel"
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diff_cmd="nix store diff-closures ${before_flake}#${drv} ${after_flake}#${drv}"
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# Initially build host so that we don't spam the log
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change_lines=$($diff_cmd 2>&1 | wc -l)
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# Run once so that we have the colorful output in the github actions log
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$diff_cmd && build_ok=true || build_ok=false
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if [[ $change_lines -gt 0 ]] || [[ ! $build_ok ]]; then
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if $build_ok; then
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echo "ok"
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echo "${host} changed"
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echo -e "<details>\n<summary><b>${host}</b> changed</summary>\n\n" >> "$step_summary"
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else
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echo "${host} failed to build"
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echo -e "<details>\n<summary><b>${host}</b> failed to build</summary>\n\n" >> "$step_summary"
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fi
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{
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echo '```';
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$diff_cmd --show-trace | sed -e 's/\x1b\[[0-9;]*m//g';
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echo '```';
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echo -e "\n</details>\n";
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} >> "$step_summary" 2>&1
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else
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echo -e "**${host}** has not changed\n" | tee -a "$step_summary"
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fi
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echo "::endgroup::"
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fi
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done
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