refactor: change subflake locking to an absolute git locking strategy for compatibility with nix 2.18+

Author: blaggacao

.envrc

@@ -1,11 +1,8 @@
 #!/bin/sh
 
-# first time
-if [[ ! -d $(nix store add-path --name source --dry-run .) ]]; then
-  nix store add-path --name source .
-  (cd ./src/local && nix flake lock --update-input std)
-  (cd ./src/tests && nix flake lock --update-input std)
-fi
+# This locks subflakes to the latest commit of std
+(cd ./src/local && nix flake lock --override-input std git+file://$(pwd)/../..?rev=$(git -C ../.. rev-parse HEAD))
+(cd ./src/tests && nix flake lock --override-input std git+file://$(pwd)/../..?rev=$(git -C ../.. rev-parse HEAD))
 
 # shellcheck disable=SC1090
 . "$(fetchurl "https://raw.githubusercontent.com/paisano-nix/direnv/main/lib" "sha256-IgQhKK7UHL1AfCUntJO2KCaIDJQotRnK2qC4Daxk+wI=")"

.github/workflows/update-subflake.sh

@@ -1,12 +1,6 @@
 # create the store path of
-nix store add-path --name source .
+nix store add --name source .
 
-# update the subflake lockfile to the (now existing) store path
-# set lastModified to 1 because unknown issues in the GH action environment
-(cd ./src/local && nix flake lock --update-input std && (
-  jq '.nodes.std.locked.lastModified = 1' flake.lock > flake.lock.new && rm flake.lock && mv flake.lock.new flake.lock
-) && git add -f flake.lock)
-(cd ./src/tests && nix flake lock --update-input std && (
-  jq '.nodes.std.locked.lastModified = 1' flake.lock > flake.lock.new && rm flake.lock && mv flake.lock.new flake.lock
-) &&git add -f flake.lock)
-# continue normally ...
+# This locks subflakes to the latest commit of std
+(cd ./src/local && nix flake lock --override-input std git+file://$(pwd)/../..?rev=$(git -C ../.. rev-parse HEAD)&shallow=1)
+(cd ./src/tests && nix flake lock --override-input std git+file://$(pwd)/../..?rev=$(git -C ../.. rev-parse HEAD)&shallow=1)