fetchPypiLegacy: add test

pkgs/build-support/fetchpypilegacy/default.nix

@@ -14,6 +14,8 @@
   file,
   # SRI hash
   hash,
+  # allow overriding the derivation name
+  name ? null,
 }:
 let
   urls' = urls ++ lib.optional (url != null) url;
@@ -27,17 +29,16 @@ let
 in
 # Assert that we have at least one URL
 assert urls' != [ ]; runCommand file
-  {
+  ({
     nativeBuildInputs = [ python3 ];
     impureEnvVars = lib.fetchers.proxyImpureEnvVars;
     outputHashMode = "flat";
-    outputHashAlgo = null;
+    # if hash is empty select a default algo to let nix propose the actual hash.
+    outputHashAlgo = if hash == "" then "sha256" else null;
     outputHash = hash;
     NETRC = netrc_file;
-    passthru = {
-      urls = urls';
-    };
   }
+  // (lib.optionalAttrs (name != null) {inherit name;}))
   ''
     python ${./fetch-legacy.py} ${lib.concatStringsSep " " (map (url: "--url ${lib.escapeShellArg url}") urls')} --pname ${pname} --filename ${file}
     mv ${file} $out

pkgs/build-support/fetchpypilegacy/tests.nix

@@ -0,0 +1,9 @@
+{ testers, fetchPypiLegacy, ... }: {
+  # Tests that we can send custom headers with spaces in them
+  fetchSimple = testers.invalidateFetcherByDrvHash fetchPypiLegacy {
+    pname = "requests";
+    file = "requests-2.31.0.tar.gz";
+    url = "https://pypi.org/simple";
+    hash = "sha256-lCxadY+Y15Dq7Ropy27vx/+w0c968Fw9J5Flbb1q0eE=";
+  };
+}

pkgs/test/default.nix

@@ -111,6 +111,7 @@ with pkgs;
   fetchzip = callPackages ../build-support/fetchzip/tests.nix { };
   fetchgit = callPackages ../build-support/fetchgit/tests.nix { };
   fetchFirefoxAddon = callPackages ../build-support/fetchfirefoxaddon/tests.nix { };
+  fetchPypiLegacy = callPackages ../build-support/fetchpypilegacy/tests.nix { };
 
   install-shell-files = callPackage ./install-shell-files {};