Add script and Github workflow to automate colcon updates

.github/workflows/update-colcon.yaml

@@ -0,0 +1,31 @@
+name: Update colcon packages
+on:
+ schedule:
+ - cron: "0 12 * * FRI"
+ workflow_dispatch:
+jobs:
+ update:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v3
+ - uses: cachix/install-nix-action@v27
+ with:
+ nix_path: nixpkgs=channel:nixos-unstable
+ - uses: cachix/cachix-action@v12
+ with:
+ name: ros
+ signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+ - name: Configure git
+ run: |
+ git config user.name 'github-actions[bot]'
+ git config user.email 'github-actions[bot]@users.noreply.github.com'
+ - name: Update colcon
+ run: maintainers/scripts/update-colcon.sh --build --commit
+ - name: Create Pull Request
+ uses: peter-evans/create-pull-request@v7
+ with:
+ branch: colcon-updates
+ delete-branch: true
+ title: 'Colcon updates'
+ body: |
+ Automated changes by `maintainers/scripts/update-colcon.sh`

maintainers/scripts/update-colcon.sh

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+#!/usr/bin/env nix-shell
+#! nix-shell -i bash --pure
+#! nix-shell -p jq nix nix-update cacert git
+
+# Usage: update-colcon.sh [nix-update options]
+
+set -euo pipefail
+
+nix eval --json --impure --expr '
+let
+ pkgs = (import ./. {});
+ lib = pkgs.lib;
+ colconPkgs = lib.filterAttrs (n: v: builtins.substring 0 7 n == "colcon-") pkgs.python3Packages;
+in
+ lib.attrNames colconPkgs' \
+ | jq --raw-output '.[]' \
+ | while read pkg; do nix-update "$@" python3Packages."$pkg"; done