Add cheat sheets (#7)

* Got the new cheat sheet to build.

* Fix inkscape/Fontconfig warnings.

* Use filesets to restrict the files in the cheat sheet derivation.

* Clean up main tex file.

* Extracted paper and color styling from the main tex file.

* add .gitignore

* Renamed files for consistency.

* Cheat sheets now available as the product of a4/letter and color/bw.

* Remove unnecessary attributes from callPackage.

* Fixed the dollar to pound sign bug.

* Patched out pygment formatting on comments and strings. Didn't like the way the fonts looked.

* The grayscale/bw name from bw to print.

* Change variables named 'set' to 's' so as to not confuse the reader. They might think 'set' is a keyword.

.gitignore

@@ -0,0 +1,2 @@
+### Nix ###
+result*

cheatsheet/color-default.tex

@@ -0,0 +1,7 @@
+\usepackage{minted}
+\usemintedstyle{default}
+
+% Define colors
+\usepackage{xcolor}
+\definecolor{nixdarkblue}{HTML}{5277C3}
+\definecolor{codelight}{HTML}{f8f8f8}

cheatsheet/color-print.tex

@@ -0,0 +1,7 @@
+\usepackage{minted}
+\usemintedstyle{bw}
+
+% Define colors
+\usepackage{xcolor}
+\definecolor{nixdarkblue}{HTML}{747474}
+\definecolor{codelight}{HTML}{ffffff}

cheatsheet/default.nix

@@ -0,0 +1,95 @@
+{ pkgs }:
+let
+  tex = pkgs.texlive.combine {
+    inherit (pkgs.texlive)
+      scheme-basic
+      environ
+      etoolbox
+      fancyvrb
+      koma-script
+      latexmk
+      listings
+      listingsutf8
+      metafont
+      hyperref
+      minted
+      pdfcol
+      pgf
+      svg
+      tcolorbox
+      texlive-scripts
+      tikzfill
+      transparent
+      upquote
+      xcolor
+      ;
+  };
+
+  pygments = pkgs.python3Packages.pygments.overridePythonAttrs (old: {
+    patches = (old.patches or [ ]) ++ [
+      # removed bold and italics formatting for comments and strings
+      ./unformatted-comments-strings.patch
+    ];
+  });
+
+  inherit (pkgs) lib;
+
+  combinations = lib.cartesianProduct {
+    paper = [
+      "a4"
+      "letter"
+    ];
+    color = [
+      "default"
+      "print"
+    ];
+  };
+in
+lib.listToAttrs (
+  builtins.map (elem: {
+    name = "cheat-sheet-${elem.paper}-${elem.color}";
+
+    value = pkgs.stdenvNoCC.mkDerivation {
+      name = "nixos-cheat-sheet";
+
+      src = lib.fileset.toSource {
+        root = ./.;
+        fileset = lib.fileset.unions [
+          ./main.tex
+          ./paper-${elem.paper}.tex
+          ./color-${elem.color}.tex
+          ./nixos.svg
+          ./background.svg
+        ];
+      };
+
+      buildInputs = [
+        tex
+        pkgs.inkscape # for svg images
+        pygments # for minted code blocks
+      ];
+
+      # HOME needs to be set to keep inkscape/Fontconfig from complaining
+      buildPhase = ''
+        mv paper-${elem.paper}.tex paper.tex
+        mv color-${elem.color}.tex color.tex
+
+        DIR=$(mktemp -d)
+        env TEXMFHOME="$DIR/.cache" \
+        TEXMFVAR="$DIR/.cache/texmf-var" \
+        HOME="$DIR/home" \
+        latexmk \
+          -interaction=nonstopmode \
+          -pdf -pdflatex \
+          -output-directory="." \
+          -shell-escape \
+          main.tex
+      '';
+
+      installPhase = ''
+        mkdir $out
+        cp main.pdf $out/cheat-sheet-${elem.paper}-${elem.color}.pdf
+      '';
+    };
+  }) combinations
+)