CircleCI caching for the docs job

.circleci/config.yml

@@ -34,12 +34,6 @@ jobs:
     docker:
       - image: "nixorg/nix:circleci"
     steps:
-      - run:
-          name: "Install Git"
-          command: |
-            # Required for the checkout step
-            nix-env -i git openssh
-
       - "checkout"
 
       - restore_cache:
@@ -63,46 +57,43 @@ jobs:
             - privatestorageio-nix-store-v1-{{ checksum "nixpkgs.rev" }}
             - privatestorageio-nix-store-v1-
 
-      - save_cache:
-          name: "Cache Nix Store Paths"
-          key: privatestorageio-nix-store-v1-{{ checksum "nixpkgs.rev" }}
-          paths:
-            - "/nix"
-
       - run:
           name: "Run Tests"
           command: |
             export NIX_PATH=nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/$(cat nixpkgs.rev).tar.gz
             nix-build --max-jobs 1 nixos/system-tests.nix -A driver
 
+      - save_cache:
+          name: "Cache Nix Store Paths"
+          key: privatestorageio-nix-store-v1-{{ checksum "nixpkgs.rev" }}
+          paths:
+            - "/nix"
+
   build:
     docker:
       - image: "nixorg/nix:circleci"
     steps:
-      - run:
-          name: "Install CA Certificates"
-          command: |
-            # Required for cache and artifact interactions.  Though we use a
-            # nix image, it's actually an alpine base...  The CircleCI cache
-            # management (which we stopped using) and artifact uploader don't
-            # know how to use the nix ca bundle we could install.
-            apk update
-            apk add ca-certificates
-
-      - run:
-          name: "Install Git"
-          command: |
-            # Required for the checkout step
-            nix-env -i git openssh
-
       - "checkout"
 
+      - restore_cache:
+          # See comments for nix store caching in `build` job.
+          name: "Restore Nix Store Paths"
+          keys:
+            - privatestorageio-docs-nix-store-v1-{{ checksum "nixpkgs.rev" }}
+            - privatestorageio-docs-nix-store-v1-
+
       - run:
           name: "Nix Build"
           command: |
             export NIX_PATH=nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/$(cat nixpkgs.rev).tar.gz
             nix-build docs.nix
 
+      - save_cache:
+          name: "Cache Nix Store Paths"
+          key: privatestorageio-docs-nix-store-v1-{{ checksum "nixpkgs.rev" }}
+          paths:
+            - "/nix"
+
       - store_artifacts:
           path: "result/docs"
           destination: "docs"