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use anyhow::{bail, format_err, Context, Error};
use mdman::{Format, ManMap};
use std::collections::HashMap;
use std::path::{Path, PathBuf};
use url::Url;
/// Command-line options.
struct Options {
format: Format,
output_dir: PathBuf,
sources: Vec<PathBuf>,
url: Option<Url>,
man_map: ManMap,
}
fn main() {
if let Err(e) = run() {
eprintln!("error: {}", e);
for cause in e.chain().skip(1) {
eprintln!("\nCaused by:");
for line in cause.to_string().lines() {
if line.is_empty() {
eprintln!();
} else {
eprintln!(" {}", line);
}
}
}
std::process::exit(1);
}
}
fn run() -> Result<(), Error> {
let opts = process_args()?;
if !opts.output_dir.exists() {
std::fs::create_dir_all(&opts.output_dir).with_context(|| {
format!(
"failed to create output directory {}",
opts.output_dir.display()
)
})?;
}
for source in &opts.sources {
let section = mdman::extract_section(source)?;
let filename =
Path::new(source.file_name().unwrap()).with_extension(opts.format.extension(section));
let out_path = opts.output_dir.join(filename);
if same_file::is_same_file(source, &out_path).unwrap_or(false) {
bail!("cannot output to the same file as the source");
}
println!("Converting {} -> {}", source.display(), out_path.display());
let result = mdman::convert(&source, opts.format, opts.url.clone(), opts.man_map.clone())
.with_context(|| format!("failed to translate {}", source.display()))?;
std::fs::write(out_path, result)?;
}
Ok(())
}
fn process_args() -> Result<Options, Error> {
let mut format = None;
let mut output = None;
let mut url = None;
let mut man_map: ManMap = HashMap::new();
let mut sources = Vec::new();
let mut args = std::env::args().skip(1);
while let Some(arg) = args.next() {
match arg.as_str() {
"-t" => {
format = match args.next().as_deref() {
Some("man") => Some(Format::Man),
Some("md") => Some(Format::Md),
Some("txt") => Some(Format::Text),
Some(s) => bail!("unknown output format: {}", s),
None => bail!("-t requires a value (man, md, txt)"),
};
}
"-o" => {
output = match args.next() {
Some(s) => Some(PathBuf::from(s)),
None => bail!("-o requires a value"),
};
}
"--url" => {
url = match args.next() {
Some(s) => {
let url = Url::parse(&s)
.with_context(|| format!("could not convert `{}` to a url", s))?;
if !url.path().ends_with('/') {
bail!("url `{}` should end with a /", url);
}
Some(url)
}
None => bail!("--url requires a value"),
}
}
"--man" => {
let man = args
.next()
.ok_or_else(|| format_err!("--man requires a value"))?;
let parts: Vec<_> = man.splitn(2, '=').collect();
let key_parts: Vec<_> = parts[0].splitn(2, ':').collect();
if parts.len() != 2 || key_parts.len() != 2 {
bail!("--man expected value with form name:1=link");
}
let section: u8 = key_parts[1].parse().with_context(|| {
format!("expected unsigned integer for section, got `{}`", parts[1])
})?;
man_map.insert((key_parts[0].to_string(), section), parts[1].to_string());
}
s => {
sources.push(PathBuf::from(s));
}
}
}
if format.is_none() {
bail!("-t must be specified (man, md, txt)");
}
if output.is_none() {
bail!("-o must be specified (output directory)");
}
if sources.is_empty() {
bail!("at least one source must be specified");
}
let opts = Options {
format: format.unwrap(),
output_dir: output.unwrap(),
sources,
url,
man_map,
};
Ok(opts)
}
|
