feat(python-pdm): initialize wheel filtering

modules/dream2nix/WIP-python-pdm/lib.nix

@@ -2,6 +2,18 @@
   lib,
   libpyproject,
 }: rec {
+  getFilename = url: lib.lists.last (lib.splitString "/" url);
+
+  # Convert sources to mapping with filename as key.
+  sourcesToAttrs = sources:
+    lib.listToAttrs (
+      map (
+        source:
+          lib.nameValuePair (getFilename source.url) source
+      )
+      sources
+    );
+
   isUsableFilename = {
     environ,
     filename,
@@ -41,6 +53,7 @@
     environ,
     filename,
   }: let
+    # TODO: implement it
     parsed_filename = libpyproject.pep427.parseFileName filename;
     is_valid_build = true;
     is_valid_implementation = true;
@@ -102,19 +115,31 @@
   # Returns a set with package name as key
   # and as value the version, sources and dependencies
   # The packages are not yet divided into groups.
-  parseLockData = {lock-data}: let
+  parseLockData = {
+    lock-data,
+    environ,
+    selector,
+  }: let
     # TODO: validate against lock file version.
     func = item: let
+      sources = sourcesToAttrs lock-data.metadata.files."${item.name} ${item.version}";
+      compatibleSources =
+        lib.filterAttrs
+        (
+          filename: source:
+            isUsableFilename {inherit environ filename;}
+        )
+        sources;
       value = {
         inherit (item) version;
-        requires_python = item.requires_python or null; # check already here against Python version?
-        sources = lock-data.metadata.files."${item.name} ${item.version}";
+        source = sources.${selector (lib.attrNames compatibleSources)};
         # In the future we could add additional meta data fields
         # such as summary
       };
     in
       lib.nameValuePair item.name value;
   in
+    # TODO: packages need to be filtered on environment.
     lib.listToAttrs (map func lock-data.package);
 
   # }

tests/nix-unit/test_python-pdm-lib/default.nix

@@ -148,11 +148,20 @@
   };
   tests_parseLockData = let
     lock-data = lib.importTOML ./../../../examples/dream2nix-repo-flake-pdm/pdm.lock;
-    parsed = libpdm.parseLockData {inherit lock-data;};
+    version = "2023.7.22";
+    parsed = libpdm.parseLockData {
+      inherit lock-data;
+      environ = lib.importJSON ./environ.json;
+      selector = libpdm.preferWheelSelector;
+    };
   in {
     test_parseLockData = {
-      expr = lib.elemAt (lib.attrNames parsed) 0;
-      expected = "certifi";
+      expr =
+        (parsed ? "certifi")
+        && (parsed.certifi.version == version)
+        && (parsed.certifi ? source)
+        && (parsed.certifi.source.url == "https://files.pythonhosted.org/packages/4c/dd/2234eab22353ffc7d94e8d13177aaa050113286e93e7b40eae01fbf7c3d9/certifi-2023.7.22-py3-none-any.whl");
+      expected = true;
     };
   };
 in

tests/nix-unit/test_python-pdm-lib/environ.json

@@ -0,0 +1,85 @@
+{
+  "implementation_name": {
+    "type": "string",
+    "value": "cpython"
+  },
+  "implementation_version": {
+    "type": "version",
+    "value": {
+      "dev": null,
+      "epoch": 0,
+      "local": null,
+      "post": null,
+      "pre": null,
+      "release": [
+        3,
+        10,
+        12
+      ]
+    }
+  },
+  "os_name": {
+    "type": "string",
+    "value": "posix"
+  },
+  "platform_machine": {
+    "type": "string",
+    "value": "x86_64"
+  },
+  "platform_python_implementation": {
+    "type": "string",
+    "value": "CPython"
+  },
+  "platform_release": {
+    "type": "string",
+    "value": ""
+  },
+  "platform_system": {
+    "type": "string",
+    "value": "Linux"
+  },
+  "platform_version": {
+    "type": "version",
+    "value": {
+      "dev": null,
+      "epoch": 0,
+      "local": null,
+      "post": null,
+      "pre": null,
+      "release": []
+    }
+  },
+  "python_full_version": {
+    "type": "version",
+    "value": {
+      "dev": null,
+      "epoch": 0,
+      "local": null,
+      "post": null,
+      "pre": null,
+      "release": [
+        3,
+        10,
+        12
+      ]
+    }
+  },
+  "python_version": {
+    "type": "version",
+    "value": {
+      "dev": null,
+      "epoch": 0,
+      "local": null,
+      "post": null,
+      "pre": null,
+      "release": [
+        3,
+        10
+      ]
+    }
+  },
+  "sys_platform": {
+    "type": "string",
+    "value": "linux"
+  }
+}