Add a wrapper to colmena that stops unintended toe-stepping
Taken from lix/web-services, commit hash 6d29ce968e64225faf03450c063d11a0a5c89cac Co-authored-by: Jade Lovelace <lix@jade.fyi>
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@ -65,8 +65,9 @@
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packages = [
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inputs.agenix.packages.${system}.agenix
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pkgs.colmena
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pkgs.opentofu
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(pkgs.callPackage ./lib/colmena-wrapper.nix { })
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];
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};
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14
lib/colmena-wrapper.nix
Normal file
14
lib/colmena-wrapper.nix
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@ -0,0 +1,14 @@
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# A wrapper for colmena that prevents accidentally deploying changes without
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# having pulled.
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{ colmena, runCommandNoCC }:
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runCommandNoCC "colmena-wrapper"
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{
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env.colmena = "${colmena}/bin/colmena";
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} ''
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mkdir -p $out
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ln -s ${colmena}/share $out/share
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mkdir $out/bin
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substituteAll ${./colmena-wrapper.sh.in} $out/bin/colmena
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chmod +x $out/bin/colmena
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''
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29
lib/colmena-wrapper.sh.in
Executable file
29
lib/colmena-wrapper.sh.in
Executable file
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@ -0,0 +1,29 @@
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#!/usr/bin/env bash
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doChecks() {
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# creates refs in the refs/prefetch/remotes/origin namespace
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echo "Prefetching repo changes..." >&2
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git fetch --quiet --prefetch --no-write-fetch-head origin
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diffs=$(git rev-list --left-right --count HEAD...refs/prefetch/remotes/origin/main)
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only_in_local=$(echo "$diffs" | cut -f1)
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only_in_main=$(echo "$diffs" | cut -f2)
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if [[ $only_in_main -gt 0 && ! -v $FOOTGUN_ME_UWU ]]; then
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echo >&2
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echo "Attempting to deploy when main has $only_in_main commits not in your branch!" >&2
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echo "This will probably revert someone's changes. Consider merging them." >&2
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echo "If you really mean it, set the environment variable FOOTGUN_ME_UWU" >&2
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exit 1
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fi
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if [[ $only_in_local -gt 0 ]]; then
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echo "You have $only_in_local commits not yet pushed to main. Reminder to push them after :)" >&2
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fi
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}
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if [[ $1 == 'apply' ]]; then
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doChecks
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fi
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exec @colmena@ "$@"
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