feat: initial v3 rewrite

nix/packages/scripts/finalize_nix_ci.sh

@@ -0,0 +1,40 @@
+echo -e "\\e[0Ksection_start:`date +%s`:finalize_nix_ci[collapsed=true]\\r\\e[0KFinalizing Nix CI..."
+  nix path-info --all > /tmp/nix-store-after
+  echo "Finding new paths..."
+  NEW_PATHS=$(diff --new-line-format="%L" \
+    --old-line-format="" --unchanged-line-format="" \
+    /tmp/nix-store-before /tmp/nix-store-after)
+  COUNT=$(wc -l <<<"$NEW_PATHS")
+
+  if [[ "$NIX_CI_CACHE_STRATEGY" == "auto" ]]; then
+    export NIX_CI_CACHE_STRATEGY="${NIX_CI_RUNNER_CACHE_STRATEGY:-${NIX_CI_DEFAULT_CACHE_STRATEGY:-none}}";
+  fi
+
+  if [ -z "$NIX_CI_DISABLE_CACHE" ]; then
+    echo -e "\\e[0Ksection_start:`date +%s`:cache_push[collapsed=true]\\r\\e[0KPushing $COUNT new store paths to cache ($NIX_CI_CACHE_STRATEGY)"
+      echo -n "$NEW_PATHS" | {
+        case "$NIX_CI_CACHE_STRATEGY" in
+          "runner")
+            export RUNNER_CACHE=''${RUNNER_CACHE:-"file://$(pwd)/.nix-cache"}
+            # add ^* to all store paths ending in .drv (prevent warning log spam)
+            sed '/\.drv$/s/$/^*/' | nix copy --quiet --to "$RUNNER_CACHE" --stdin || true
+            ;;
+          "attic")
+            attic push --stdin ci:$ATTIC_CACHE || true
+            ;;
+          "cachix")
+            cachix push $CACHIX_CACHE || true
+            ;;
+          "none")
+            echo "Cache strategy is none, doing nothing..."
+            ;;
+          *)
+            echo "WARNING: Invalid cache strategy set: '$NIX_CI_CACHE_STRATEGY'"
+            ;;
+        esac
+      }
+    echo -e "\\e[0Ksection_end:`date +%s`:cache_push\\r\\e[0K"
+  else
+    echo "Caching disabled, not uploading $COUNT new store entries..."
+  fi
+echo -e "\\e[0Ksection_end:`date +%s`:finalize_nix_ci\\r\\e[0K"