1 files changed, 46 insertions, 0 deletions
diff --git a/srcds-pkgs/fetchdepotfile.nix b/srcds-pkgs/fetchdepotfile.nix
new file mode 100644
index 0000000..6af2507
--- /dev/null
+++ b/srcds-pkgs/fetchdepotfile.nix
@@ -0,0 +1,46 @@
+# as nice as it would be to just put the file in its expected directory
+# structure and symlinkJoin them together at the end, creating that structure
+# sacrifices the use of steam's hashes -- nix hashing isn't hierarchical
+# or anything, just "archive everything and hash it like another flat file".
+{ lib, runCommand
+, depotdownloader, cacert
+}:
+{ FileName, FileHash, Flags, cache, ... }:
+with lib;
+assert !hasPrefix "/" FileName;
+let
+  dirname = dirOf FileName;
+  basename = baseNameOf FileName;
+  src = runCommand basename {
+    inherit (cache.passthru) app depot manifest;
+    inherit basename dirname FileName;
+    cache = "${cache}";
+
+    passthru = { inherit dirname basename; };
+    nativeBuildInputs = [ depotdownloader cacert ];
+    outputHashMode = "flat";
+    outputHashAlgo = "sha1";
+    outputHash = FileHash;
+  } ''
+    export HOME=$PWD
+    cp -r $cache/.DepotDownloader ./
+    chmod -R 777 .DepotDownloader
+    DepotDownloader \
+      -app $app -depot $depot -manifest $manifest \
+      -filelist <(echo "$FileName") -dir .
+
+    mv $FileName $out
+    chmod -x $out
+  '';
+# nix refuses to flat hash executables lol
+in if bitAnd Flags 32 != 0 then
+  runCommand src.name {
+    inherit src;
+    inherit (src) passthru;
+  } ''
+    cp $src $out
+    chmod +x $out
+  ''
+else src
+
+