use crate::html::markdown::{ErrorCodes, IdMap, Markdown, Playground};
use crate::rustc_span::edition::Edition;
use std::fs;
use std::path::Path;
use std::str;
#[derive(Clone, Debug)]
crate struct ExternalHtml {
/// Content that will be included inline in the section of a
/// rendered Markdown file or generated documentation
crate in_header: String,
/// Content that will be included inline between and the content of
/// a rendered Markdown file or generated documentation
crate before_content: String,
/// Content that will be included inline between the content and of
/// a rendered Markdown file or generated documentation
crate after_content: String,
}
impl ExternalHtml {
crate fn load(
in_header: &[String],
before_content: &[String],
after_content: &[String],
md_before_content: &[String],
md_after_content: &[String],
nightly_build: bool,
diag: &rustc_errors::Handler,
id_map: &mut IdMap,
edition: Edition,
playground: &Option,
) -> Option {
let codes = ErrorCodes::from(nightly_build);
let ih = load_external_files(in_header, diag)?;
let bc = load_external_files(before_content, diag)?;
let m_bc = load_external_files(md_before_content, diag)?;
let bc = format!(
"{}{}",
bc,
Markdown(&m_bc, &[], id_map, codes, edition, playground).into_string()
);
let ac = load_external_files(after_content, diag)?;
let m_ac = load_external_files(md_after_content, diag)?;
let ac = format!(
"{}{}",
ac,
Markdown(&m_ac, &[], id_map, codes, edition, playground).into_string()
);
Some(ExternalHtml { in_header: ih, before_content: bc, after_content: ac })
}
}
crate enum LoadStringError {
ReadFail,
BadUtf8,
}
crate fn load_string>(
file_path: P,
diag: &rustc_errors::Handler,
) -> Result {
let file_path = file_path.as_ref();
let contents = match fs::read(file_path) {
Ok(bytes) => bytes,
Err(e) => {
diag.struct_err(&format!("error reading `{}`: {}", file_path.display(), e)).emit();
return Err(LoadStringError::ReadFail);
}
};
match str::from_utf8(&contents) {
Ok(s) => Ok(s.to_string()),
Err(_) => {
diag.struct_err(&format!("error reading `{}`: not UTF-8", file_path.display())).emit();
Err(LoadStringError::BadUtf8)
}
}
}
fn load_external_files(names: &[String], diag: &rustc_errors::Handler) -> Option {
let mut out = String::new();
for name in names {
let s = match load_string(name, diag) {
Ok(s) => s,
Err(_) => return None,
};
out.push_str(&s);
out.push('\n');
}
Some(out)
}