feat: init

README.md

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+# colmena anywhere
+
+A thin wrapper around [nixos-anywhere](https://github.com/numtide/nixos-anywhere)
+to build with colmena
+
+Colmena configurations must use disko.
+
+# Usage
+
+You need to have colmena into your path (and of course all the basic utils you may expect from a linux distro)
+
+```
+$ ./colmena-anywhere.sh --help
+```

colmena-anywhere.nix

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+{ pkgs, nodes, node, host, extraArgs, ... }:
+let
+  inherit (nodes.${node}.config.system.build) diskoScript toplevel;
+  colmenaAnywhere = pkgs.writeShellApplication {
+    name = "colmena-anywhere-${node}";
+    runtimeInputs = [ pkgs.nixos-anywhere ];
+    text = ''
+      nixos-anywhere -s ${diskoScript} ${toplevel} ${host} ${extraArgs}
+    '';
+  };
+in {
+  out = colmenaAnywhere;
+  drvPath = colmenaAnywhere.drvPath;
+  runPath = "${colmenaAnywhere}/bin/${colmenaAnywhere.name}";
+}

colmena-anywhere.sh

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+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+usage="$(basename "$0") [-h] [--dryrun] NODE HOST [-- NIXOS_ANYWHERE_EXTRA_ARGS]
+Deploy a brand new nixos system using colmena and nixos anywhere
+
+where:
+    -h        Show this help text
+    --dryrun  Print the nixos-anywhere invocation
+
+Exemple:
+    ./colmena-anywhere.sh node root@example.com"
+
+extra_args=""
+dry_run=no
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+  --help)
+    echo "$usage"
+    exit 0
+    ;;
+
+  --dry-run)
+    dry_run=y
+    ;;
+
+  --)
+    shift
+    extra_args="$*"
+    break
+    ;;
+
+  *)
+    if [[ -z ${node-} ]]; then
+      node="$1"
+    elif [[ -z ${host-} ]]; then
+      host="$1"
+    else
+      echo "Wrong arguments. Help:"
+      echo "$usage"
+      exit 1
+    fi
+    ;;
+  esac
+  shift
+done
+
+if [[ -z ${host-} ]]; then
+      echo "Wrong arguments. Help:"
+  echo "$usage"
+  exit 1
+fi
+
+# Get info about the derivation containing the 'nixos-anywhere' invocation
+script_infos=$(colmena eval -E "args: import $SCRIPT_DIR/colmena-anywhere.nix (args // { node=\"$node\"; host=\"$host\"; extraArgs=\"$extra_args\"; })")
+
+# realise derivation (because colmena eval only eval stuff)
+echo "$script_infos" | jq -r ".drvPath" | xargs nix-store -r
+
+# Run !
+command=$(echo "$script_infos" | jq -r ".runPath")
+
+if [ "$dry_run" = "y" ]; then
+  cat "$command"
+else
+  $command
+fi