nix: patch tokei with hledger support

nix/custom/tokei/default.nix

@@ -0,0 +1,43 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  fetchpatch,
+  rustPlatform,
+  libiconv,
+  darwin,
+  zlib,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "tokei";
+  version = "13.0.0-alpha.1";
+
+  src = fetchFromGitHub {
+    owner = "XAMPPRocky";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-oKgTBfwOAP4fJzgN8NBR0KcuVD0caa9Qf3dkCb0zUR8=";
+  };
+
+  cargoSha256 = "sha256-NE6hw6rgSDOsmSD6JpOfBLgGKGPfPmHjpMIsqLOkH7M=";
+
+  patches = [
+    (fetchpatch {
+      name = "typst.patch";
+      url = "https://github.com/XAMPPRocky/tokei/commit/bb911d457d18309c88786ab722d057eeebc5522d.patch";
+      hash = "sha256-gBqOOp3zZcL0SosiVtjnyWJwwLgi/ECiiyelp0rL7+g=";
+    })
+    ./hledger.patch
+  ];
+
+  buildInputs = lib.optionals stdenv.isDarwin [
+    libiconv
+    darwin.Security
+  ];
+
+  checkInputs = lib.optionals stdenv.isDarwin [ zlib ];
+
+  # enable all output formats
+  buildFeatures = [ "all" ];
+}

nix/custom/tokei/hledger.patch

@@ -0,0 +1,42 @@
+diff --git a/languages.json b/languages.json
+index ac548b9..b2899f1 100644
+--- a/languages.json
++++ b/languages.json
+@@ -846,6 +846,13 @@
+       "nested": true,
+       "extensions": ["lean", "hlean"]
+     },
++    "Hledger": {
++      "name": "hledger",
++      "line_comment": [";", "#"],
++      "multi_line_comments": [["comment", "end comment"]],
++      "nested": false,
++      "extensions": ["hledger"]
++    },
+     "Less": {
+       "name": "LESS",
+       "line_comment": ["//"],
+diff --git a/tests/data/hledger.hledger b/tests/data/hledger.hledger
+new file mode 100644
+index 0000000..df7259d
+--- /dev/null
++++ b/tests/data/hledger.hledger
+@@ -0,0 +1,18 @@
++# 18 lines 6 code 10 comments 2 blanks
++# a comment
++; another comment
++
++; ^ a blank line
++comment
++account assets             ; Declare valid account names and display order.
++a block comment
++end comment
++
++account assets:savings     ; A subaccount. This one represents a bank account.
++account assets:checking    ; Another. Note, 2+ spaces after the account name.
++account assets:receivable  ; Accounting type is inferred from english names,
++account passifs            ; or declared with a "type" tag, type:L
++account expenses           ; type:X
++                           ; A follow-on comment line, indented.
++account expenses:rent      ; Expense and revenue categories are also accounts.
++                           ; Subaccounts inherit their parent's type.