improve variable names' clarity

bin/nix-build-and-cache

@@ -12,7 +12,7 @@ just() {
 
     # Find all output paths of the installables and their build dependencies
     readarray -t derivations < <(nix path-info --derivation "$@")
-    readarray -t cache < <(
+    readarray -t upload_paths < <(
         xargs \
             nix-store --query --requisites --include-outputs \
             <<< "${derivations[*]}"
@@ -32,13 +32,13 @@ just() {
         IFS=$'\n'
         nix run --inputs-from . attic#default -- \
             push --stdin --no-closure "$ATTIC_SERVER:$ATTIC_CACHE" \
-            <<< "${cache[*]}"
+            <<< "${upload_paths[*]}"
     )
 }
 
 # Build and cache things needed for CI
 ci() {
-    cache=(
+    installables=(
         --inputs-from .
 
         # Keep sorted
@@ -49,19 +49,19 @@ ci() {
         nixpkgs#nix-direnv
     )
 
-    just "${cache[@]}"
+    just "${installables[@]}"
 }
 
 # Build and cache all the package outputs
 packages() {
-    readarray -t cache < <(
+    readarray -t installables < <(
         nix flake show --json 2> /dev/null |
             nix run --inputs-from . nixpkgs#jq -- \
             -r \
             '.packages."x86_64-linux" | keys | map(".#" + .) | .[]'
     )
 
-    just "${cache[@]}"
+    just "${installables[@]}"
 }
 
 pushd "$(git rev-parse --show-toplevel)" > /dev/null