buildDotnetModule: point fetch-deps at module's deps file by default

Previously, you had to provide the path to the deps.nix of the package inside
your Nixpkgs checkout as an argument manually. Now it just does that by default
when no argument is passed.

1 files changed, 11 insertions, 1 deletions

diff --git a/pkgs/build-support/dotnet/build-dotnet-module/default.nix b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
index 514255f324a..311eb2b293e 100644
--- a/pkgs/build-support/dotnet/build-dotnet-module/default.nix
+++ b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
@@ -168,6 +168,15 @@ stdenvNoCC.mkDerivation (args // {
           if runtimeId != null
           then [ runtimeId ]
           else map (system: dotnetCorePackages.systemToDotnetRid system) platforms;
+        defaultDepsFile =
+          # Wire in the nugetDeps file such that running the script with no args
+          # runs it agains the correct deps file by default.
+          # Note that toString is necessary here as it results in the path at
+          # eval time (i.e. to the file in your local Nixpkgs checkout) rather
+          # than the Nix store path of the path after it's been imported.
+          if lib.isPath nugetDeps && !lib.hasPrefix "/nix/store/" (toString nugetDeps)
+          then toString nugetDeps
+          else ''$(mktemp -t "${pname}-deps-XXXXXX.nix")'';
       in
       writeShellScript "fetch-${pname}-deps" ''
         set -euo pipefail
@@ -238,7 +247,8 @@ stdenvNoCC.mkDerivation (args // {
         export DOTNET_NOLOGO=1
         export DOTNET_CLI_TELEMETRY_OPTOUT=1
 
-        depsFile=$(realpath "''${1:-$(mktemp -t "${pname}-deps-XXXXXX.nix")}")
+        depsFile=$(realpath "''${1:-${defaultDepsFile}}")
+        echo Will write lockfile to "$depsFile"
         mkdir -p "$tmp/nuget_pkgs"
 
         storeSrc="${srcOnly args}"