add helper/update-flake.sh
This greatly simplifies updating nixpkgs. See the comment at the top of update-flake.sh for a description.
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helper/update-flake.nix
Normal file
77
helper/update-flake.nix
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@ -0,0 +1,77 @@
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{ prevVersions ? null }:
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let
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flake = builtins.getFlake (toString ../.);
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inherit (flake.inputs.nixpkgs) lib;
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in rec {
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# Convert the list of pinned pkgs to an attrset with form
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# {
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# stable = { bitcoind = "0.21.1"; ... };
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# unstable = { btcpayserver = "1.2.1"; ... };
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# }
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# A pinned pkg is added to `stable` if the stable and unstable pkg versions
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# are identical.
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versions = let
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pinned = flake.nbPkgs.x86_64-linux.pinned;
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pinnedPkgs = lib.filterAttrs (n: v: lib.isDerivation v) pinned;
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stable = pinned.pkgs;
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unstable = pinned.pkgsUnstable;
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isStable = builtins.partition (pkgName:
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!(unstable ? "${pkgName}") ||
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((stable ? "${pkgName}") && stable.${pkgName}.version == unstable.${pkgName}.version)
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) (builtins.attrNames pinnedPkgs);
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in {
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stable = lib.genAttrs isStable.right (pkgName: stable.${pkgName}.version);
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unstable = lib.genAttrs isStable.wrong (pkgName: unstable.${pkgName}.version);
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};
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showUpdates = let
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prev = builtins.fromJSON prevVersions;
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prevPkgs = prev.stable // prev.unstable;
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mapFilter = f: xs: lib.remove null (map f xs);
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mkChanges = title: pkgs:
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let
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lines = mapFilter (pkgName:
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let
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version = pkgs.${pkgName};
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prevVersion = prevPkgs.${pkgName};
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in
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if version != prevVersion then
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"${pkgName}: ${prevVersion} -> ${version}"
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else
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null
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) (builtins.attrNames pkgs);
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in
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if lines == [] then
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null
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else
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builtins.concatStringsSep "\n" ([title] ++ lines);
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changes = [
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(mkChanges "Pkg updates in nixpkgs stable:" versions.stable)
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(mkChanges "Pkg updates in nixpkgs unstable:" versions.unstable)
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];
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allChanges = builtins.concatStringsSep "\n\n" (lib.remove null changes);
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in
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if allChanges == "" then
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"No pkg version updates."
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else
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allChanges;
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pinnedFile = let
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toLines = pkgs: builtins.concatStringsSep "\n " (builtins.attrNames pkgs);
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in ''
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# This file is generated by ../helper/update-flake.nix
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pkgs: pkgsUnstable:
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{
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inherit (pkgs)
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${toLines versions.stable};
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inherit (pkgsUnstable)
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${toLines versions.unstable};
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inherit pkgs pkgsUnstable;
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}
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'';
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}
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45
helper/update-flake.sh
Executable file
45
helper/update-flake.sh
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@ -0,0 +1,45 @@
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#!/usr/bin/env bash
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set -euo pipefail
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# This script does the following:
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# - Update all flake inputs, including nixpkgs
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# - Print version updates of pinned pkgs like so:
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# Pkg updates in nixpkgs unstable:
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# bitcoin: 0.20.0 -> 0.21.1
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# btcpayserver: 1.1.0 -> 1.1.2
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# - Write ../pkgs/pinned.nix:
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# Packages for which the stable und unstable versions are identical are
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# pinned to stable.
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# All other pkgs are pinned to unstable.
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# cd to script dir
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cd "${BASH_SOURCE[0]%/*}"
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if [[ $(nix flake 2>&1) != *"requires a sub-command"* ]]; then
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echo "Error. This script requires nix flake support."
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echo "https://nixos.wiki/wiki/Flakes#Installing_flakes"
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exit 1
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fi
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if [[ ${1:-} != -f ]] && ! git diff --quiet ../flake.{nix,lock}; then
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echo "error: flake.nix/flake.lock have changes. Run with option -f to ignore."
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exit 1
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fi
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versions=$(nix eval --json -f update-flake.nix versions)
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## Uncomment the following to generate a version change message for testing
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# versions=$(echo "$versions" | sed 's|1|0|g')
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nix flake update ..
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echo
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nix eval --raw -f update-flake.nix --argstr prevVersions "$versions" showUpdates; echo
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pinned=../pkgs/pinned.nix
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pinnedSrc=$(nix eval --raw -f update-flake.nix --argstr prevVersions "$versions" pinnedFile)
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if [[ $pinnedSrc != $(cat "$pinned") ]]; then
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echo "$pinnedSrc" > "$pinned"
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echo
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echo "Updated pinned.nix"
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fi
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