python3Packages.debugpy: make src reproducible

Author: kira-bruneau

pkgs/development/python-modules/debugpy/default.nix

@@ -32,7 +32,17 @@ buildPythonPackage rec {
     owner = "microsoft";
     repo = "debugpy";
     tag = "v${version}";
-    hash = "sha256-U9WeWAX0qDusWcMsFaI1ct4YKlGQEHUYlKZfRiYhma0=";
+
+    # Upstream uses .gitattributes to inject information about the revision
+    # hash and the refname into `src/debugpy/_version.py`, see:
+    #
+    # - https://git-scm.com/docs/gitattributes#_export_subst and
+    # - https://github.com/microsoft/debugpy/blob/v1.8.17/src/debugpy/_version.py#L24-L30
+    postFetch = ''
+      sed -i 's/git_refnames = "[^"]*"/git_refnames = " (tag: ${src.tag})"/' "$out/src/debugpy/_version.py"
+    '';
+
+    hash = "sha256-eAiCtSJUqLASapxnYCyq1UCiGz6QmKQum7Vs3MoU1s8=";
   };
 
   patches = [