Cargo.toml

@@ -1,20 +1,20 @@
 [package]
 name = "md2pdf"
-version = "0.0.3"
+version = "0.0.1"
 authors = ["Thomas Forgione <thomas@forgione.fr>"]
 description = "A small utility to convert markdown files to pdf exploiting tectonic."
 edition = "2021"
 license = "MIT"
 repository = "https://gitea.tforgione.fr/tforgione/md2pdf"
 readme = "README.md"
+cargo = "1.64"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tectonic = "0.9"
+tectonic = "0.5.2"
 pulldown-cmark = "0.5.3"
 clap = { version = "4.0.7", features = ["cargo"] }
-convert_case = "0.6.0"
 
 [lib]
 name = "md2pdf"
@@ -23,7 +23,3 @@ path = "src/lib.rs"
 [[bin]]
 name = "md2pdf"
 path = "src/main.rs"
-
-[dev-dependencies]
-pretty_assertions = "1.3.0"
-lopdf = "0.27.0"

README.md

@@ -5,7 +5,7 @@
 
 ### Usage
 
-```sh
+```
 md2pdf -i input.md -o output.pdf
 ```
 

src/lib.rs

@@ -1,7 +1,6 @@
-use convert_case::{Case, Casing};
 use pulldown_cmark::{Event, Parser, Tag};
 
-pub const LATEX_HEADER: &str = r#"\documentclass{scrartcl}
+pub const LATEX_HEADER:&str = r#"\documentclass{scrartcl}
 \usepackage{graphicx}
 \usepackage{hyperref}
 \usepackage{listings}
@@ -42,83 +41,26 @@ pub const LATEX_HEADER: &str = r#"\documentclass{scrartcl}
 
 pub const LATEX_FOOTER: &str = "\n\\end{document}\n";
 
-/// Used to keep track of current pulldown_cmark "event".
-/// TODO: Is there a native pulldown_cmark method to do this?
-#[derive(Debug)]
-enum EventType {
-    //Code,
-    Emphasis,
-    Header,
-    //Html,
-    Strong,
-    Table,
-    TableHead,
-    Text,
-}
-
-struct CurrentType {
-    event_type: EventType,
-}
-
-/**
- * Part of this function is Copyright Liam Beckman <liam@liambeckman.com> (license: MPL-2.0)
- * Source: https://github.com/lbeckman314/md2tex/blob/25fa878ccce122c224c24659ee1c1dd30c8a5d51/src/lib.rs
- *
- */
 pub fn markdown_to_latex(markdown: String) -> String {
     let mut output = String::from(LATEX_HEADER);
 
     let parser = Parser::new(&markdown);
 
-    let mut header_value = String::new();
-
-    let mut current: CurrentType = CurrentType {
-        event_type: EventType::Text,
-    };
-    let mut cells = 0;
-
-    let mut equation_mode = false;
-    let mut buffer = String::new();
-
     for event in parser {
         match event {
             Event::Start(Tag::Header(level)) => {
-                current.event_type = EventType::Header;
-                output.push_str("\n");
                 output.push_str("\\");
-                match level {
+                for _ in 1 .. level {
-                    -1 => output.push_str("part{"),
+                    output.push_str("sub");
-                    0 => output.push_str("chapter{"),
-                    1 => output.push_str("section{"),
-                    2 => output.push_str("subsection{"),
-                    3 => output.push_str("subsubsection{"),
-                    4 => output.push_str("paragraph{"),
-                    5 => output.push_str("subparagraph{"),
-                    _ => eprintln!("header is out of range."),
                 }
-            }
+                output.push_str("section{");
-            Event::End(Tag::Header(_)) => {
+            },
-                output.push_str("}\n");
+            Event::End(Tag::Header(_)) => output.push_str("}\n"),
-                output.push_str("\\");
-                output.push_str("label{");
-                output.push_str(&header_value);
-                output.push_str("}\n");
 
-                output.push_str("\\");
+            Event::Start(Tag::Emphasis) => output.push_str("\\emph{"),
-                output.push_str("label{");
-                output.push_str(&header_value.to_case(Case::Kebab));
-                output.push_str("}\n");
-            }
-            Event::Start(Tag::Emphasis) => {
-                current.event_type = EventType::Emphasis;
-                output.push_str("\\emph{");
-            }
             Event::End(Tag::Emphasis) => output.push_str("}"),
 
-            Event::Start(Tag::Strong) => {
+            Event::Start(Tag::Strong) => output.push_str("\\textbf{"),
-                current.event_type = EventType::Strong;
-                output.push_str("\\textbf{");
-            }
             Event::End(Tag::Strong) => output.push_str("}"),
 
             Event::Start(Tag::List(None)) => output.push_str("\\begin{itemize}\n"),
@@ -127,116 +69,16 @@ pub fn markdown_to_latex(markdown: String) -> String {
             Event::Start(Tag::List(Some(_))) => output.push_str("\\begin{enumerate}\n"),
             Event::End(Tag::List(Some(_))) => output.push_str("\\end{enumerate}\n"),
 
-            Event::Start(Tag::Paragraph) => {
-                output.push_str("\n");
-            }
-
-            Event::End(Tag::Paragraph) => {
-                // ~ adds a space to prevent
-                // "There's no line here to end" error on empty lines.
-                output.push_str(r"~\\");
-                output.push_str("\n");
-            }
-
             Event::Start(Tag::Link(_, url, _)) => {
                 output.push_str("\\href{");
                 output.push_str(&*url);
                 output.push_str("}{");
-            }
+            },
 
             Event::End(Tag::Link(_, _, _)) => {
                 output.push_str("}");
-            }
-
-            Event::Start(Tag::Table(_)) => {
-                current.event_type = EventType::Table;
-                let table_start = vec![
-                    "\n",
-                    r"\begingroup",
-                    r"\setlength{\LTleft}{-20cm plus -1fill}",
-                    r"\setlength{\LTright}{\LTleft}",
-                    r"\begin{longtable}{!!!}",
-                    r"\hline",
-                    r"\hline",
-                    "\n",
-                ];
-                for element in table_start {
-                    output.push_str(element);
-                    output.push_str("\n");
-                }
-            }
-
-            Event::Start(Tag::TableHead) => {
-                current.event_type = EventType::TableHead;
-            }
-
-            Event::End(Tag::TableHead) => {
-                output.truncate(output.len() - 2);
-                output.push_str(r"\\");
-                output.push_str("\n");
-
-                output.push_str(r"\hline");
-                output.push_str("\n");
-
-                // we presume that a table follows every table head.
-                current.event_type = EventType::Table;
-            }
-
-            Event::End(Tag::Table(_)) => {
-                let table_end = vec![
-                    r"\arrayrulecolor{black}\hline",
-                    r"\end{longtable}",
-                    r"\endgroup",
-                    "\n",
-                ];
-
-                for element in table_end {
-                    output.push_str(element);
-                    output.push_str("\n");
-                }
-
-                let mut cols = String::new();
-                for _i in 0..cells {
-                    cols.push_str(&format!(
-                        r"C{{{width}\textwidth}} ",
-                        width = 1. / cells as f64
-                    ));
-                }
-                output = output.replace("!!!", &cols);
-                cells = 0;
-                current.event_type = EventType::Text;
-            }
-
-            Event::Start(Tag::TableCell) => match current.event_type {
-                EventType::TableHead => {
-                    output.push_str(r"\bfseries{");
-                }
-                _ => (),
             },
 
-            Event::End(Tag::TableCell) => {
-                match current.event_type {
-                    EventType::TableHead => {
-                        output.push_str(r"}");
-                        cells += 1;
-                    }
-                    _ => (),
-                }
-
-                output.push_str(" & ");
-            }
-
-            Event::Start(Tag::TableRow) => {
-                current.event_type = EventType::Table;
-            }
-
-            Event::End(Tag::TableRow) => {
-                output.truncate(output.len() - 2);
-                output.push_str(r"\\");
-                output.push_str(r"\arrayrulecolor{lightgray}\hline");
-                output.push_str("\n");
-            }
-
             Event::Start(Tag::Image(_, path, title)) => {
                 output.push_str("\\begin{figure}\n");
                 output.push_str("\\centering\n");
@@ -246,105 +88,32 @@ pub fn markdown_to_latex(markdown: String) -> String {
                 output.push_str("\\caption{");
                 output.push_str(&*title);
                 output.push_str("}\n\\end{figure}\n");
-            }
+            },
 
             Event::Start(Tag::Item) => output.push_str("\\item "),
             Event::End(Tag::Item) => output.push_str("\n"),
 
             Event::Start(Tag::CodeBlock(lang)) => {
-                if !lang.is_empty() {
+                if ! lang.is_empty() {
                     output.push_str("\\begin{lstlisting}[language=");
                     output.push_str(&*lang);
                     output.push_str("]\n");
                 } else {
                     output.push_str("\\begin{lstlisting}\n");
                 }
-            }
+            },
 
             Event::End(Tag::CodeBlock(_)) => {
                 output.push_str("\n\\end{lstlisting}\n");
-                current.event_type = EventType::Text;
+            },
-            }
-
-            Event::Code(t) => {
-                output.push_str("\\lstinline|");
-                match current.event_type {
-                    EventType::Header => output
-                        .push_str(&*t.replace("#", r"\#").replace("…", "...").replace("З", "3")),
-                    _ => output
-                        .push_str(&*t.replace("…", "...").replace("З", "3").replace("<EFBFBD>", r"\<5C>")),
-                }
-                output.push_str("|");
-            }
 
             Event::Text(t) => {
-                // if "\(" or "\[" are encountered, then begin equation
+                output.push_str(&*t);
-                // and don't replace any characters.
+            },
-                let delim_start = vec![r"\(", r"\["];
-                let delim_end = vec![r"\)", r"\]"];
-
-                if buffer.len() > 100 {
-                    buffer.clear();
-                }
-
-                buffer.push_str(&t.clone().into_string());
-
-                match current.event_type {
-                    EventType::Strong
-                    | EventType::Emphasis
-                    | EventType::Text
-                    | EventType::Header
-                    | EventType::Table => {
-                        // TODO more elegant way to do ordered `replace`s (structs?).
-                        if delim_start
-                            .into_iter()
-                            .any(|element| buffer.contains(element))
-                        {
-                            let popped = output.pop().unwrap();
-                            if popped != '\\' {
-                                output.push(popped);
-                            }
-                            output.push_str(&*t);
-                            equation_mode = true;
-                        } else if delim_end
-                            .into_iter()
-                            .any(|element| buffer.contains(element))
-                            || equation_mode == true
-                        {
-                            let popped = output.pop().unwrap();
-                            if popped != '\\' {
-                                output.push(popped);
-                            }
-                            output.push_str(&*t);
-                            equation_mode = false;
-                        } else {
-                            output.push_str(
-                                &*t.replace(r"\", r"\\")
-                                    .replace("&", r"\&")
-                                    .replace(r"\s", r"\textbackslash{}s")
-                                    .replace(r"\w", r"\textbackslash{}w")
-                                    .replace("_", r"\_")
-                                    .replace(r"\<", "<")
-                                    .replace(r"%", r"\%")
-                                    .replace(r"$", r"\$")
-                                    .replace(r"—", "---")
-                                    .replace("#", r"\#"),
-                            );
-                        }
-                        header_value = t.into_string();
-                    }
-                    _ => output.push_str(&*t),
-                }
-            }
 
             Event::SoftBreak => {
                 output.push('\n');
-            }
+            },
-
-            Event::HardBreak => {
-                output.push_str(r"\\");
-                output.push('\n');
-            }
 
             _ => (),
         }
@@ -359,112 +128,3 @@ pub fn markdown_to_pdf(markdown: String) -> Result<Vec<u8>, tectonic::Error> {
     tectonic::latex_to_pdf(markdown_to_latex(markdown))
 }
 
-#[cfg(test)]
-mod tests {
-    use super::{markdown_to_latex, markdown_to_pdf};
-    use lopdf::Document;
-    use pretty_assertions::assert_eq;
-    use std::io::Cursor;
-
-    const MARKDOWN_IN: &str = r#"# First title
-Some content
-## Second level
-Text
-[link](https://example.com)
-**Bold**
-__Italic__
-
-some code:
-```sh
-sudo make-it-work
-```
-issue [#12345](https://example.com)
-"#;
-    const LATEXT_OUT: &str = r#"\documentclass{scrartcl}
-\usepackage{graphicx}
-\usepackage{hyperref}
-\usepackage{listings}
-\usepackage{xcolor}
-\definecolor{colKeys}{rgb}{0,0.5,0}
-\definecolor{colIdentifier}{rgb}{0,0,0}
-\definecolor{colComments}{rgb}{0,0.5,1}
-\definecolor{colString}{rgb}{0.6,0.1,0.1}
-\definecolor{colBackground}{rgb}{0.95,0.95,1}
-\lstset{%configuration de listings
-   float=hbp,%
-   basicstyle=\ttfamily\small,%
-   %
-   identifierstyle=\color{colIdentifier}, %
-   keywordstyle=\color{colKeys}, %
-   stringstyle=\color{colString}, %
-   commentstyle=\color{colComments}\textit, %
-   %
-   backgroundcolor=\color{colBackground},%
-   %
-   columns=flexible, %
-   tabsize=2, %
-   frame=trbl, %
-   %frameround=tttt,%
-   extendedchars=true, %
-   showspaces=false, %
-   showstringspaces=false, %
-   numbers=left, %
-   numberstyle=\tiny, %
-   breaklines=true, %
-   breakautoindent=true, %
-   captionpos=b,%
-   xrightmargin=0.2cm, %
-   xleftmargin=0.2cm
-}
-\begin{document}
-
-\section{First title}
-\label{First title}
-\label{first-title}
-
-Some content~\\
-
-\subsection{Second level}
-\label{Second level}
-\label{second-level}
-
-Text
-\href{https://example.com}{link}
-\textbf{Bold}
-\textbf{Italic}~\\
-
-some code:~\\
-\begin{lstlisting}[language=sh]
-sudo make-it-work
-
-\end{lstlisting}
-
-issue \href{https://example.com}{\#12345}~\\
-
-\end{document}
-"#;
-
-    #[test]
-    fn test_md_to_latex() {
-        let output = markdown_to_latex(MARKDOWN_IN.to_string());
-        assert_eq!(LATEXT_OUT, output);
-    }
-
-    #[test]
-    fn test_latex_to_pdf() {
-        let output = markdown_to_pdf(MARKDOWN_IN.to_string());
-
-        match output {
-            Ok(data) => {
-                let mut file = Cursor::new(data);
-                match Document::load_from(&mut file) {
-                    Ok(doc) => {
-                        assert_eq!("1.5", doc.version);
-                    }
-                    Err(_) => assert!(true),
-                }
-            }
-            Err(_) => assert!(true),
-        }
-    }
-}

src/main.rs

@@ -1,10 +1,10 @@
-use std::ffi::OsStr;
 use std::fs::File;
 use std::io::{Read, Write};
-use std::path::PathBuf;
 use std::process::exit;
+use std::path::PathBuf;
+use std::ffi::OsStr;
 
-use clap::{crate_authors, crate_description, crate_name, crate_version, Arg, Command};
+use clap::{crate_authors, crate_description, crate_name, crate_version, Command, Arg};
 
 use md2pdf::{markdown_to_latex, markdown_to_pdf};
 
@@ -17,40 +17,36 @@ macro_rules! unwrap {
                 exit(1);
             }
         }
-    };
+    }
 }
 
 fn main() {
+
     let matches = Command::new(crate_name!())
         .bin_name(crate_name!())
         .version(crate_version!())
         .author(crate_authors!("\n"))
         .about(crate_description!())
-        .arg(
+        .arg(Arg::new("INPUT")
-            Arg::new("INPUT")
+             .long("input")
-                .long("input")
+             .short('i')
-                .short('i')
+             .help("Input markdown files")
-                .help("Input markdown files")
+             .required(true)
-                .required(true)
+             .value_parser(clap::value_parser!(PathBuf))
-                .value_parser(clap::value_parser!(PathBuf)),
+            )
-        )
+        .arg(Arg::new("OUTPUT")
-        .arg(
+             .long("output")
-            Arg::new("OUTPUT")
+             .short('o')
-                .long("output")
+             .help("Output tex or pdf file")
-                .short('o')
+             .required(true)
-                .help("Output tex or pdf file")
+             .value_parser(clap::value_parser!(PathBuf))
-                .required(true)
+            )
-                .value_parser(clap::value_parser!(PathBuf)),
-        )
         .get_matches();
 
     let input_path = matches.get_one::<PathBuf>("INPUT").unwrap();
     let mut content = String::new();
     let mut input = unwrap!(File::open(input_path), "couldn't open input file");
-    unwrap!(
+    unwrap!(input.read_to_string(&mut content), "couldn't read file content");
-        input.read_to_string(&mut content),
-        "couldn't read file content"
-    );
 
     let output_path = matches.get_one::<PathBuf>("OUTPUT").unwrap();
     let output_path_ext = output_path.extension().and_then(OsStr::to_str);
@@ -60,33 +56,37 @@ fn main() {
         Some("tex") => {
             let tex = markdown_to_latex(content);
             unwrap!(output.write(tex.as_bytes()), "couldn't write output file");
-        }
+        },
-        Some("pdf") => match markdown_to_pdf(content) {
+        Some("pdf") => {
-            Ok(data) => match output.write(&data) {
+            match markdown_to_pdf(content) {
-                Ok(_) => {
+                Ok(data) => {
-                    exit(0);
+                    match output.write(&data) {
-                }
+                        Ok(_) => {
+                            exit(0);
+                        },
+                        Err(error) => {
+                            eprintln!(
+                                "error while writing file: {}", error
+                            );
+                            exit(1);
+                        },
+                    }
+                },
                 Err(error) => {
-                    eprintln!("error while writing file: {}", error);
+                    eprintln!(
+                        "error while compiling latex: {}", error.description()
+                    );
                     exit(1);
                 }
-            },
-            Err(error) => {
-                eprintln!("error while compiling latex: {}", error.description());
-                exit(1);
             }
         },
         Some(ext) => {
-            eprintln!(
+            eprintln!("unknown file format ({}) for output: {}", ext, output_path.display());
-                "unknown file format ({}) for output: {}",
-                ext,
-                output_path.display()
-            );
             exit(1);
-        }
+        },
         None => {
             eprintln!("unknown file format for output: {}", output_path.display());
             exit(1);
-        }
+        },
     }
 }