Working on rnls update script noci

modules/kernels/rust/language_server_rust_analyzer/rnls-version.nix

@@ -0,0 +1 @@
+"0.2.3.0"

modules/kernels/rust/language_server_rust_analyzer/rnls_update.sh

@@ -0,0 +1,40 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p nix-prefetch python3
+
+VERSION=$(nix eval --raw --expr 'import ./rnls-version.nix' --impure)
+
+echo "Got version: $VERSION"
+
+NEW_HASHES=$(
+  for system in x86_64-linux x86_64-darwin aarch64-darwin; do
+    URL="https://github.com/codedownio/rust-notebook-language-server/releases/download/v${VERSION}/rust-notebook-language-server-${VERSION}-${system}.tar.gz"
+    HASH=$(nix-prefetch fetchzip --url "$URL" 2>/dev/null)
+
+    echo >&2 "$URL -> $HASH"
+
+    echo "      \"$system\" = fetchzip {"
+    echo "        url = \"$URL\";"
+    echo "        hash = \"$HASH\";"
+    echo "      });"
+  done
+)
+
+py_script=$(cat <<END
+from operator import indexOf
+import sys
+
+input = sys.stdin.read()
+
+with open("./rnls.nix", 'r') as f:
+  lines = f.readlines()
+
+start_index = indexOf(map(lambda x: "HASHES_START" in x, lines), True)
+end_index = indexOf(map(lambda x: "HASHES_END" in x, lines), True)
+
+with open("./rnls.nix", 'w') as f:
+  f.write("".join(lines[0:(start_index+1)]) + input + "".join(lines[end_index:]))
+
+END
+)
+
+echo "$NEW_HASHES" | python -c "$py_script"