Merge pull request 'ci: evaluate hosts discovered from the flake, not a hard-coded list' (#19) from fix/ci-dynamic-host-eval into main

Reviewed-on: #19

.gitea/workflows/ci.yaml

@@ -34,10 +34,16 @@ jobs:
       # Evaluate (not build) each host's toplevel so eval errors fail CI cheaply.
       # aarch64 / darwin hosts evaluate fine on an x86_64 runner; only building
       # would need emulation, which we deliberately avoid here.
+      #
+      # Host lists are discovered from the flake (attrNames of
+      # nixos/darwinConfigurations) rather than hard-coded, so adding or removing
+      # a host needs no change to this workflow.
       - name: Evaluate NixOS host configurations
         run: |
           set -euo pipefail
-          for host in lyrathorpe-mbp lyrathorpe-x1c emmathorpe-edaas; do
+          hosts=$(nix eval --raw '.#nixosConfigurations' \
+            --apply 'cfgs: builtins.concatStringsSep "\n" (builtins.attrNames cfgs)')
+          for host in $hosts; do
             echo "::group::eval $host"
             nix eval --raw ".#nixosConfigurations.$host.config.system.build.toplevel.drvPath"
             echo
@@ -47,7 +53,9 @@ jobs:
       - name: Evaluate Darwin host configurations
         run: |
           set -euo pipefail
-          for host in lyrathorpe-mac; do
+          hosts=$(nix eval --raw '.#darwinConfigurations' \
+            --apply 'cfgs: builtins.concatStringsSep "\n" (builtins.attrNames cfgs)')
+          for host in $hosts; do
             echo "::group::eval $host"
             nix eval --raw ".#darwinConfigurations.$host.config.system.build.toplevel.drvPath"
             echo