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md2pdf
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Better binary, adds support for links

This commit is contained in:
Thomas Forgione 2019-07-15 12:04:34 +02:00
parent 9955be2107
commit c8931b47f4
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GPG Key ID: 203DAEA747F48F41
4 changed files with 181 additions and 103 deletions
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1
Cargo.lock generated
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@ -371,6 +371,7 @@ dependencies = [
name = "md2pdf"
version = "0.1.0"
dependencies = [
"clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
"pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
"tectonic 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
]

2
Cargo.toml
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@ -2,6 +2,7 @@
name = "md2pdf"
version = "0.1.0"
authors = ["Thomas Forgione <thomas@forgione.fr>"]
description = "A small utility to convert markdown files to pdf exploiting tectonic."
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
@ -9,3 +10,4 @@ edition = "2018"
[dependencies]
tectonic = "0.1.11"
pulldown-cmark = "0.5.2"
clap = "2.33.0"

130
src/lib.rs Normal file
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@ -0,0 +1,130 @@
use pulldown_cmark::{Event, Parser, Tag};
pub const LATEX_HEADER:&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}
"#;
pub const LATEX_FOOTER: &str = "\n\\end{document}\n";
pub fn markdown_to_latex(markdown: String) -> String {
let mut output = String::from(LATEX_HEADER);
let parser = Parser::new(&markdown);
for event in parser {
match event {
Event::Start(Tag::Header(level)) => {
output.push_str("\\");
for _ in 1 .. level {
output.push_str("sub");
}
output.push_str("section{");
},
Event::End(Tag::Header(_)) => output.push_str("}\n"),
Event::Start(Tag::Emphasis) => output.push_str("\\emph{"),
Event::End(Tag::Emphasis) => output.push_str("}"),
Event::Start(Tag::Strong) => output.push_str("\\textbf{"),
Event::End(Tag::Strong) => output.push_str("}"),
Event::Start(Tag::List(None)) => output.push_str("\\begin{itemize}\n"),
Event::End(Tag::List(None)) => output.push_str("\\end{itemize}\n"),
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::Link(_, url, _)) => {
output.push_str("\\href{");
output.push_str(&*url);
output.push_str("}{");
},
Event::End(Tag::Link(_, _, _)) => {
output.push_str("}");
},
Event::Start(Tag::Image(_, path, title)) => {
output.push_str("\\begin{figure}\n");
output.push_str("\\centering\n");
output.push_str("\\includegraphics[width=\\textwidth]{");;
output.push_str(&*path);
output.push_str("}\n");
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() {
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");
},
Event::Text(t) => {
output.push_str(&*t);
},
Event::SoftBreak => {
output.push('\n');
},
_ => (),
}
}
output.push_str(LATEX_FOOTER);
output
}
pub fn markdown_to_pdf(markdown: String) -> Result<Vec<u8>, tectonic::Error> {
tectonic::latex_to_pdf(markdown_to_latex(markdown))
}

151
src/main.rs
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@ -1,115 +1,60 @@
use std::fs::File;
use std::io::{Read, Write};
use std::process::exit;
use pulldown_cmark::{Event, Parser, Tag};
use clap::{crate_authors, crate_description, crate_name, crate_version, App, Arg};
use md2pdf::{markdown_to_latex, markdown_to_pdf};
macro_rules! unwrap {
($e: expr, $m: expr) => {
match $e {
Ok(v) => v,
Err(e) => {
eprintln!("{}: {}", $m, e);
exit(1);
}
}
}
}
fn main() {
let mut markdown_input = String::new();
let mut input = File::open("markdown.md").unwrap();
input.read_to_string(&mut markdown_input).unwrap();
let matches = App::new(crate_name!())
.bin_name(crate_name!())
.version(crate_version!())
.author(crate_authors!("\n"))
.about(crate_description!())
.arg(Arg::with_name("INPUT")
.long("input")
.short("i")
.help("Input markdown files")
.required(true)
.takes_value(true))
.arg(Arg::with_name("OUTPUT")
.long("output")
.short("o")
.help("Output tex or pdf file")
.required(true)
.takes_value(true))
.get_matches();
let parser = Parser::new(&markdown_input);
let mut content = String::new();
let mut input = unwrap!(File::open(matches.value_of("INPUT").unwrap()), "couldn't open input file");
unwrap!(input.read_to_string(&mut content), "couldn't read file content");
let mut tex_output = String::new();
tex_output.push_str("\\documentclass{scrartcl}\n");
tex_output.push_str("\\usepackage{graphicx}\n");
tex_output.push_str("\\usepackage{listings}\n");
tex_output.push_str("\\usepackage{xcolor}\n");
tex_output.push_str("\\definecolor{colKeys}{rgb}{0,0.5,0}\n");
tex_output.push_str("\\definecolor{colIdentifier}{rgb}{0,0,0}\n");
tex_output.push_str("\\definecolor{colComments}{rgb}{0,0.5,1}\n");
tex_output.push_str("\\definecolor{colString}{rgb}{0.6,0.1,0.1}\n");
tex_output.push_str("\\definecolor{colBackground}{rgb}{0.95,0.95,1}\n");
tex_output.push_str("\\lstset{%configuration de listings\n");
tex_output.push_str(" float=hbp,%\n");
tex_output.push_str(" basicstyle=\\ttfamily\\small,%\n");
tex_output.push_str(" %\n");
tex_output.push_str(" identifierstyle=\\color{colIdentifier}, %\n");
tex_output.push_str(" keywordstyle=\\color{colKeys}, %\n");
tex_output.push_str(" stringstyle=\\color{colString}, %\n");
tex_output.push_str(" commentstyle=\\color{colComments}\textit, %\n");
tex_output.push_str(" %\n");
tex_output.push_str(" backgroundcolor=\\color{colBackground},%\n");
tex_output.push_str(" %\n");
tex_output.push_str(" columns=flexible, %\n");
tex_output.push_str(" tabsize=2, %\n");
tex_output.push_str(" frame=trbl, %\n");
tex_output.push_str(" %frameround=tttt,%\n");
tex_output.push_str(" extendedchars=true, %\n");
tex_output.push_str(" showspaces=false, %\n");
tex_output.push_str(" showstringspaces=false, %\n");
tex_output.push_str(" numbers=left, %\n");
tex_output.push_str(" numberstyle=\\tiny, %\n");
tex_output.push_str(" breaklines=true, %\n");
tex_output.push_str(" breakautoindent=true, %\n");
tex_output.push_str(" captionpos=b,%\n");
tex_output.push_str(" xrightmargin=0.2cm, %\n");
tex_output.push_str(" xleftmargin=0.2cm\n");
tex_output.push_str("}\n");
tex_output.push_str("\\begin{document}\n");
let output_path = matches.value_of("OUTPUT").unwrap();
let mut output = unwrap!(File::create(output_path), "couldn't open output file");
for event in parser {
match event {
Event::Start(Tag::Header(level)) => {
tex_output.push_str("\\");
for _ in 1 .. level {
tex_output.push_str("sub");
}
tex_output.push_str("section{");
},
Event::End(Tag::Header(_)) => tex_output.push_str("}\n"),
Event::Start(Tag::Emphasis) => tex_output.push_str("\\emph{"),
Event::End(Tag::Emphasis) => tex_output.push_str("}"),
Event::Start(Tag::Strong) => tex_output.push_str("\\textbf{"),
Event::End(Tag::Strong) => tex_output.push_str("}"),
Event::Start(Tag::List(None)) => tex_output.push_str("\\begin{itemize}\n"),
Event::End(Tag::List(None)) => tex_output.push_str("\\end{itemize}\n"),
Event::Start(Tag::List(Some(_))) => tex_output.push_str("\\begin{enumerate}\n"),
Event::End(Tag::List(Some(_))) => tex_output.push_str("\\end{enumerate}\n"),
Event::Start(Tag::Image(_, path, title)) => {
tex_output.push_str("\\begin{figure}\n");
tex_output.push_str("\\centering\n");
tex_output.push_str("\\includegraphics[width=\\textwidth]{");;
tex_output.push_str(&*path);
tex_output.push_str("}\n");
tex_output.push_str("\\caption{");
tex_output.push_str(&*title);
tex_output.push_str("}\n\\end{figure}\n");
},
Event::Start(Tag::Item) => tex_output.push_str("\\item "),
Event::End(Tag::Item) => tex_output.push_str("\n"),
Event::Start(Tag::CodeBlock(lang)) => {
if ! lang.is_empty() {
tex_output.push_str("\\begin{lstlisting}[language=");
tex_output.push_str(&*lang);
tex_output.push_str("]\n");
} else {
tex_output.push_str("\\begin{lstlisting}\n");
}
},
Event::End(Tag::CodeBlock(_)) => {
tex_output.push_str("\n\\end{lstlisting}\n");
}
Event::Text(t) => tex_output.push_str(&*t),
_ => (),
}
if output_path.ends_with(".tex") {
let tex = markdown_to_latex(content);
unwrap!(output.write(tex.as_bytes()), "couldn't write output file");
} else if output_path.ends_with(".pdf") {
let data = unwrap!(markdown_to_pdf(content), "error while compiling latex, this is most likely a bug");
unwrap!(output.write(&data), "coudln't write output file");
} else {
eprintln!("unknown file format for output: {}", output_path);
exit(1);
}
tex_output.push_str("\n\\end{document}\n");
println!("{}", tex_output);
let pdf_data = tectonic::latex_to_pdf(tex_output).expect("processing failed");
let mut output = File::create("output.pdf").unwrap();
output.write(&pdf_data).unwrap();
}