WIP - Kotlin Edition configuration files

src/Makefile

@@ -11,30 +11,38 @@ DEFAULTTOPTEX = ctfp-reader.tex ctfp-print.tex
 
 SCALATEXFILES = ctfp-reader-scala.tex ctfp-print-scala.tex # todo make this a macro
 
+KOTLINTEXFILES = ctfp-reader-kotlin.tex ctfp-print-kotlin.tex # todo make this a macro
+
 # Top-level LaTeX files from which CTFP book can be generated
-TOPTEXFILES = version.tex $(DEFAULTTOPTEX) $(SCALATEXFILES)
+TOPTEXFILES = version.tex $(DEFAULTTOPTEX) $(SCALATEXFILES) $(KOTLINTEXFILES)
 
 # Default PDF file to make
 DEFAULTPDF:=$(DEFAULTTOPTEX:.tex=.pdf)
 
 # Scala PDF file to make
 SCALAPDF:=$(SCALATEXFILES:.tex=.pdf)
 
-# Other PDF files for the CTFP book
+# Kotlin PDF file to make
+KOTLINPDF:=$(KOTLINTEXFILES:.tex=.pdf)
+
+# Other PDF files for the CTFP book 
 TOPPDFFILES:=$(TOPTEXFILES:.tex=.pdf)
 
 # Configuration files
 OPTFILES = opt-print-ustrade.tex \
 			opt-reader-10in.tex \
-			opt-scala.tex
+			opt-scala.tex \
+			opt-kotlin.tex
 
 # All the LaTeX files for the CTFP book in order of dependency
-TEXFILES = $(TOPTEXFILES) $(SCALATEXFILES) $(OPTFILES)
+TEXFILES = $(TOPTEXFILES) $(SCALATEXFILES) $(KOTLINTEXFILES) $(OPTFILES)
 
 default: $(DEFAULTPDF) copy # todo cover
 
 scala: version.tex $(SCALAPDF) copy-scala
 
+kotlin: version.tex $(KOTLINPDF) copy-kotlin
+
 # Main targets
 $(TOPPDFFILES) : %.pdf : %.tex $(TEXFILES)
 	if which latexmk > /dev/null 2>&1 ;\
@@ -53,6 +61,9 @@ copy: copy-task
 copy-scala: suffix = '-scala'
 copy-scala: copy-task
 
+copy-kotlin: suffix = '-kotlin'
+copy-kotlin: copy-task
+
 copy-task:
 	@printf 'Creating output directory: $(GIT_VER)\n'
 	mkdir -p ../out/$(GIT_VER)

src/colophon.tex

@@ -13,4 +13,9 @@
 Scala code translation was done by 
 \urlref{https://github.com/typelevel/CT_from_Programmers.scala}{Typelevel} contributors.
 }
-\fi
+\fi
+\ifdefined\OPTCustomLanguageKotlin{%
+Kotlin code translation was done by 
+\urlref{https://github.com/arrow-kt/Category-Theory-for-Programmers.kt}{ΛRROW} contributors.
+}
+\fi

src/content/editor-note.tex

@@ -5,4 +5,10 @@
   \addcontentsline{toc}{chapter}{A note from the editor}
   \input{content/\OPTCustomLanguage/editor-note}
 }
-\fi
+\fi
+\ifdefined\OPTCustomLanguageKotlin{%
+  \chapter*{A note from the editor}
+  \addcontentsline{toc}{chapter}{A note from the editor}
+  \input{content/\OPTCustomLanguageKotlin/editor-note}
+}
+\fi

src/content/kotlin/editor-note.tex

@@ -0,0 +1,29 @@
+% !TEX root = ctfp-print.tex
+
+\lettrine[lhang=0.17]{T}{his is the Kotlin edition} of \emph{Category Theory for Programmers}.
+It's been a tremendous success, making Bartosz Milewski's blog post series available as a nicely 
+typeset \acronym{PDF}, as well as a hardcover book. There have been numerous contributions made
+to improve the book, by fixing typos and errors, as well as translating the code snippets into
+other programming languages.
+
+I am thrilled to present this edition of the book, containing the original Haskell code, followed by
+its Kotlin counterpart. The Kotlin code snippets were generously provided by 
+\urlref{https://github.com/arrow-kt/Category-Theory-for-Programmers.kt}{ΛRROW} contributors, slightly 
+modified to suit the format of this book.
+
+To support code snippets in multiple languages, I am using a \LaTeX{} macro to load the code snippets
+from external files. This allows easily extending the book with other languages, while leaving the 
+original text intact. Which is why you should mentally append the words ``and Kotlin'' whenever you see
+``in Haskell'' in the text.
+
+The code is laid out in the following manner: the original Haskell code, followed by Kotlin code.
+To distinguish between them, the code snippets are braced from the left with a vertical bar, in the primary
+color of the language's logo, \raisebox{-.2mm}{\includegraphics[height=.3cm]{fig/icons/haskell.png}}, 
+and \raisebox{-.2mm}{\includegraphics[height=.3cm]{fig/icons/kotlin.png}} respectively, e.g.:
+
+\srcsnippet{content/1.5/code/haskell/snippet15.hs}{blue}{haskell}
+\unskip
+\srcsnippet{content/1.5/code/kotlin/snippet15.kt}{orange}{kotlin}
+\NoIndentAfterThis
+TODO: In addition, some Scala snippets make use of the 
+\urlref{https://github.com/non/kind-projector}{Kind Projector} compiler plugin, to support nicer syntax for partially-applied types.

src/ctfp-print-kotlin.tex

@@ -0,0 +1,3 @@
+\input{opt-kotlin}
+\input{ctfp-print}
+\input{postamble}

src/ctfp-reader-kotlin.tex

@@ -0,0 +1,3 @@
+\input{opt-kotlin}
+\input{ctfp-reader}
+\input{postamble}

src/half-title.tex

@@ -16,6 +16,14 @@
   }
 }
 \fi
+\ifdefined\OPTCustomLanguageKotlin{%
+  \vspace*{1cm}
+  \small\selectfont{
+    \textbf{\titlecap{\OPTCustomLanguageKotlin} Edition}\\
+    \textit{Contains code snippets in Haskell and \titlecap{\OPTCustomLanguageKotlin}}\\
+  }
+}
+\fi
 \vspace*{1cm}
 \fontsize{16pt}{18pt}\selectfont \textit{By } \textbf{Bartosz Milewski}\\
 \vspace{1cm}
@@ -63,4 +71,4 @@
 \noindent
 \LaTeX{} source code is available on GitHub: \href{https://github.com/hmemcpy/milewski-ctfp-pdf}{https://github.com/hmemcpy/milewski-ctfp-pdf} 
 \end{center}
-\end{small}
+\end{small}

src/opt-kotlin.tex

@@ -0,0 +1,3 @@
+\def\OPTCustomLanguageKotlin{kotlin}
+\def\OPTCustomLanguageKotlinExt{kt}
+\def\OPTCustomLanguageKotlinColor{orange}

src/preamble.tex

@@ -176,6 +176,11 @@
     \srcsnippet{\currfileabsdir/code/\OPTCustomLanguage/#1.\OPTCustomLanguageExt}{\OPTCustomLanguageColor}{\OPTCustomLanguage}{#2}
   }
   \fi
+  \ifdefined\OPTCustomLanguageKotlin{%
+    \unskip
+    \srcsnippet{\currfileabsdir/code/\OPTCustomLanguageKotlin/#1.\OPTCustomLanguageKotlinExt}{\OPTCustomLanguageKotlinColor}{\OPTCustomLanguageKotlin}{#2}
+  }
+  \fi
   \NoIndentAfterThis
 }
 \NewDocumentCommand\srcsnippet{mmmm}{