From 85f1c033c4a489e3e38cd1af0c0495b273f2e727 Mon Sep 17 00:00:00 2001
From: Chris Wells <chris@mathematicaster.org>
Date: Sun, 22 Feb 2026 22:30:47 -0600
Subject: Initial commit

---
 .gitignore         |  3 +++
 flake.lock         | 60 +++++++++++++++++++++++++++++++++++++++++++++++++
 flake.nix          | 19 ++++++++++++++++
 module.nix         | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 template/flake.nix | 39 ++++++++++++++++++++++++++++++++
 5 files changed, 186 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 module.nix
 create mode 100644 template/flake.nix

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f0b3cda
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.direnv
+result
+template/flake.lock
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..99004ba
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1769996383,
+        "narHash": "sha256-AnYjnFWgS49RlqX7LrC4uA+sCCDBj0Ry/WOJ5XWAsa0=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "57928607ea566b5db3ad13af0e57e921e6b12381",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1769909678,
+        "narHash": "sha256-cBEymOf4/o3FD5AZnzC3J9hLbiZ+QDT/KDuyHXVJOpM=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "72716169fe93074c333e8d0173151350670b824c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..d17aca5
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,19 @@
+{
+  description = "TeX devShell for flake-parts";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    systems.url = "github:nix-systems/default";
+  };
+
+  outputs = inputs @ { self, flake-parts, ... }: flake-parts.lib.mkFlake { inherit self inputs; } {
+    systems = import inputs.systems;
+
+    flake.flakeModules.default = ./module.nix;
+
+    flake.templates.default = {
+      path = ./template;
+      description = "TeX-utils default template";
+    };
+  };
+}
diff --git a/module.nix b/module.nix
new file mode 100644
index 0000000..8cd81eb
--- /dev/null
+++ b/module.nix
@@ -0,0 +1,65 @@
+{
+  lib,
+  flake-parts-lib,
+  ...
+}:
+let
+  inherit (lib) mkOption mkPackageOption mkEnableOption types;
+  inherit (flake-parts-lib) mkPerSystemOption;
+in {
+  options.perSystem = mkPerSystemOption ({ config, ... }: {
+    options = {
+      texShell = {
+        scheme = mkPackageOption pkgs "texliveSmall" {};
+        extraPackages = mkOption {
+          type = types.functionTo (types.listOf types.package);
+          description = "Extra packages to add to the texlive scheme";
+          default = _: [];
+        };
+        latexmk = {
+          enable = mkEnableOption "latexmk";
+          rc = mkOption {
+            type = types.lines;
+            description = "contents of the .latexmkrc file";
+          };
+          rcFile = mkOption {
+            type = types.path;
+            default = pkgs.writeText "latexmkrc" config.texShell.latexmk.rc;
+            description = "the .latexmkrc file";
+          };
+          _wrapper = mkOption {
+            type = types.functionTo types.package;
+            readOnly = true;
+            internal = true;
+            default = tex: pkgs.symlinkJoin {
+              inherit (tex) name;
+              nativeBuildInputs = [
+                pkgs.makeWrapper
+              ];
+              paths = [
+                tex
+              ];
+              postBuild = ''
+                wrapProgram $out/bin/latexmk --add-flags "-r" --add-flags "${config.texShell.latexmk.rcFile}"
+              '';
+            };
+          };
+        };
+      };
+    };
+
+    config = {
+      texShell.extraPackages = mkIf config.texShell.latexmk.enable (ps: [ ps.latexmk ]);
+
+      packages.texShell = let
+        wrapper = if config.texShell.latexmk.enable then config.texShell.latexmk._wrapper else x: x;
+      in wrapper (config.texShell.scheme.withPackages config.texShell.scheme.extraPackages);
+
+      devShells.texShell = pkgs.makeShell {
+        nativeBuildInputs = [
+          config.packages.texShell
+        ];
+      };
+    };
+  });
+}
diff --git a/template/flake.nix b/template/flake.nix
new file mode 100644
index 0000000..498cda1
--- /dev/null
+++ b/template/flake.nix
@@ -0,0 +1,39 @@
+{
+  description = "TeX project";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    tex-shell.url = "git://git.mathematicaster.org/tex-shell";
+    systems.url = "github:nix-systems/default";
+  };
+
+  outputs = inputs @ { self, flake-parts, ... }: flake-parts.lib.mkFlake { inherit self inputs; } {
+    systems = import inputs.systems;
+
+    imports = [
+      inputs.tex-shell.flakeModules.default
+    ];
+
+    perSystem = { pkgs, config, ... }: {
+
+      texShell = {
+        scheme = pkgs.texliveSmall;
+        latexmk = {
+          enable = true;
+          rc = /* perl */ ''
+            $out_dir = '.latex-build';
+            $pdf_mode = 1;
+            $pdflatex = 'pdflatex -interaction=nonstopmode %O %S';
+          '';
+        };
+      };
+
+      devShells.default = pkgs.mkShell {
+        inputsFrom = [
+          config.devShells.texShell
+        ];
+      };
+    };
+  };
+}
-- 
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