113 lines
3.0 KiB
Nix
113 lines
3.0 KiB
Nix
{
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# Exposes `apps.<system>` entries that point at small runnable programs.
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description = "A minimal flake apps example";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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};
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outputs =
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{ self, nixpkgs, ... }:
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let
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system = "x86_64-linux";
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pkgs = import nixpkgs { inherit system; };
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releaseName = "search-index-2026-04";
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releasePlan = [
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{
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stage = "staging";
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percentage = 10;
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owner = "team-search";
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gates = [
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"smoke-tests"
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"error-budget"
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];
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}
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{
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stage = "canary";
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percentage = 35;
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owner = "team-search";
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gates = [
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"dashboard-review"
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"support-readiness"
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];
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}
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{
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stage = "production";
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percentage = 100;
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owner = "team-search";
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gates = [
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"canary-slo"
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"stakeholder-signoff"
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];
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}
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];
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renderWave =
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wave:
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"${wave.stage}: ${toString wave.percentage}% owned by ${wave.owner}; gates: ${builtins.concatStringsSep ", " wave.gates}";
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reportText = builtins.concatStringsSep "\n" (
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[
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"release: ${releaseName}"
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"waves:"
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]
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++ map renderWave releasePlan
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);
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nextWave = builtins.elemAt releasePlan 1;
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reportPackage = pkgs.writeShellApplication {
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name = "show-rollout-report";
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text = ''
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cat <<'EOF'
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${reportText}
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EOF
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'';
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};
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promotePackage = pkgs.writeShellApplication {
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name = "suggest-next-promotion";
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text = ''
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echo "next wave: ${nextWave.stage} (${toString nextWave.percentage}%) after ${builtins.concatStringsSep " and " nextWave.gates}"
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'';
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};
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in
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{
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packages.${system} = {
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default = reportPackage;
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report = reportPackage;
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promote = promotePackage;
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};
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apps.${system} = {
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default = {
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type = "app";
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program = "${reportPackage}/bin/show-rollout-report";
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meta.description = "Print the rollout report for a release train.";
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};
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promote = {
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type = "app";
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program = "${promotePackage}/bin/suggest-next-promotion";
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meta.description = "Print the next rollout wave that should be promoted.";
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};
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};
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checks.${system}.apps-run = pkgs.runCommand "flake-apps-run" { } ''
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report="$(${self.apps.${system}.default.program})"
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promote="$(${self.apps.${system}.promote.program})"
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printf '%s\n' "$report" | grep -q '^release: ${releaseName}$'
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printf '%s\n' "$report" | grep -q '^production: 100% owned by team-search; gates: canary-slo, stakeholder-signoff$'
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if [ "$promote" != "next wave: canary (35%) after dashboard-review and support-readiness" ]; then
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echo "unexpected promotion output: $promote" >&2
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exit 1
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fi
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echo ok > "$out"
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'';
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};
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}
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