111 lines
3.4 KiB
Rust
111 lines
3.4 KiB
Rust
use crate::html::markdown::{ErrorCodes, HeadingOffset, IdMap, Markdown, Playground};
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use crate::rustc_span::edition::Edition;
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use std::fs;
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use std::path::Path;
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use std::str;
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use serde::Serialize;
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#[derive(Clone, Debug, Serialize)]
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crate struct ExternalHtml {
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/// Content that will be included inline in the `<head>` section of a
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/// rendered Markdown file or generated documentation
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crate in_header: String,
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/// Content that will be included inline between `<body>` and the content of
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/// a rendered Markdown file or generated documentation
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crate before_content: String,
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/// Content that will be included inline between the content and `</body>` of
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/// a rendered Markdown file or generated documentation
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crate after_content: String,
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}
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impl ExternalHtml {
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crate fn load(
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in_header: &[String],
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before_content: &[String],
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after_content: &[String],
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md_before_content: &[String],
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md_after_content: &[String],
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nightly_build: bool,
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diag: &rustc_errors::Handler,
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id_map: &mut IdMap,
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edition: Edition,
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playground: &Option<Playground>,
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) -> Option<ExternalHtml> {
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let codes = ErrorCodes::from(nightly_build);
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let ih = load_external_files(in_header, diag)?;
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let bc = load_external_files(before_content, diag)?;
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let m_bc = load_external_files(md_before_content, diag)?;
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let bc = format!(
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"{}{}",
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bc,
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Markdown {
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content: &m_bc,
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links: &[],
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ids: id_map,
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error_codes: codes,
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edition,
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playground,
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heading_offset: HeadingOffset::H2,
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}
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.into_string()
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);
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let ac = load_external_files(after_content, diag)?;
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let m_ac = load_external_files(md_after_content, diag)?;
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let ac = format!(
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"{}{}",
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ac,
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Markdown {
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content: &m_ac,
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links: &[],
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ids: id_map,
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error_codes: codes,
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edition,
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playground,
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heading_offset: HeadingOffset::H2,
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}
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.into_string()
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);
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Some(ExternalHtml { in_header: ih, before_content: bc, after_content: ac })
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}
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}
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crate enum LoadStringError {
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ReadFail,
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BadUtf8,
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}
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crate fn load_string<P: AsRef<Path>>(
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file_path: P,
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diag: &rustc_errors::Handler,
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) -> Result<String, LoadStringError> {
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let file_path = file_path.as_ref();
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let contents = match fs::read(file_path) {
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Ok(bytes) => bytes,
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Err(e) => {
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diag.struct_err(&format!("error reading `{}`: {}", file_path.display(), e)).emit();
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return Err(LoadStringError::ReadFail);
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}
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};
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match str::from_utf8(&contents) {
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Ok(s) => Ok(s.to_string()),
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Err(_) => {
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diag.struct_err(&format!("error reading `{}`: not UTF-8", file_path.display())).emit();
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Err(LoadStringError::BadUtf8)
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}
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}
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}
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fn load_external_files(names: &[String], diag: &rustc_errors::Handler) -> Option<String> {
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let mut out = String::new();
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for name in names {
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let s = match load_string(name, diag) {
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Ok(s) => s,
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Err(_) => return None,
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};
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out.push_str(&s);
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out.push('\n');
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}
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Some(out)
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}
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