fix(scripts): Refactor cache uploading

.forgejo/workflows/eval-shell.yaml

@@ -8,7 +8,7 @@ jobs:
         STORE_PASSWORD: ${{ secrets.STORE_PASSWORD }}
         STORE_USER: admin
       name: Build and cache shell
-      run: nix-shell -A eval-shell --run "nix-cache -A devShell"
+      run: nix-shell -A eval-shell --run "nix-instantiate-and-cache -A devShell"
 name: Build the shell
 on:
   pull_request:

default.nix

@@ -180,7 +180,7 @@ in
       pre-commit.shellHook = git-checks.shellHook;
       check-workflows.shellHook = workflows.shellHook;
       eval-nodes.packages = [ scripts.cache-node ];
-      eval-shell.packages = [ scripts.nix-cache ];
+      eval-shell.packages = [ scripts.nix-instantiate-and-cache ];
     };
   };
 }

scripts/cache-node.sh

@@ -35,23 +35,4 @@ esac
 drv=$(colmena eval --instantiate -E "{ nodes, ... }: nodes.${BUILD_NODE}.${toplevel_path}" --show-trace)
 
 # Build the derivation and send it to the great beyond
-nix-store --query --requisites --force-realise --include-outputs "$drv" | grep -v '.*\.drv' >paths.txt
-
-if [ "$STORE_PASSWORD" == "" ]; then
-  echo "No password given for the remote cache, uploading cannot take place."
-  exit 0
-fi
-
-cat <<EOF >.netrc
-default
-login $STORE_USER
-password $STORE_PASSWORD
-EOF
-
-nix copy \
-  --extra-experimental-features nix-command \
-  --to "$STORE_ENDPOINT?compression=none" \
-  --netrc-file .netrc \
-  "$(nix-store --realise "$drv")"
-
-rm .netrc
+nix-cache "$drv"

scripts/default.nix

@@ -20,8 +20,12 @@ let
     ;
 
   scripts = {
-    cache-node = [ colmena ];
-    nix-cache = [ colmena ];
+    cache-node = [
+      colmena
+      self.nix-cache
+    ];
+    nix-cache = [ ];
+    nix-instantiate-and-cache = [ self.nix-cache ];
     check-deployment = [
       colmena
       jq
@@ -30,13 +34,14 @@ let
     launch-vm = [ colmena ];
     list-nodes = [ jq ];
   };
+
+  self = mapAttrs (
+    name: runtimeInputs:
+    writeShellApplication {
+      inherit name runtimeInputs;
+
+      text = builtins.readFile ./${name}.sh;
+    }
+  ) scripts;
 in
-
-mapAttrs (
-  name: runtimeInputs:
-  writeShellApplication {
-    inherit name runtimeInputs;
-
-    text = builtins.readFile ./${name}.sh;
-  }
-) scripts
+self

scripts/nix-cache.sh

@@ -6,7 +6,8 @@
 
 # Build the derivation and send it to the great beyond
 
-drv=$(nix-instantiate "$@")
+drv=$1
+
 nix-store --query --requisites --force-realise --include-outputs "$drv" | grep -v '.*\.drv' > paths.txt
 
 if [ "$STORE_PASSWORD" == "" ]; then

scripts/nix-instantiate-and-cache.sh

@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2024 Maurice Debray <maurice@dgnum.eu>
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+nix-cache "$(nix-instantiate "$@")"

workflows/eval-shell.nix

@@ -16,7 +16,7 @@
         { uses = "actions/checkout@v3"; }
         {
           name = "Build and cache shell";
-          run = "nix-shell -A eval-shell --run \"nix-cache -A devShell\"";
+          run = "nix-shell -A eval-shell --run \"nix-instantiate-and-cache -A devShell\"";
           env = {
             STORE_ENDPOINT = "https://tvix-store.dgnum.eu/infra-signing/";
             STORE_USER = "admin";