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|
use crate::entities::{
Described, Description, EntitiesManager, EntitiesManagerComponents, Entity, Usr,
};
use anyhow::{Context, Result};
use thiserror::Error;
use threadpool::ThreadPool;
use std::collections::HashMap;
use std::path::Path;
use std::sync::{mpsc::channel, Arc};
pub(crate) fn generate(base_dir: &Path, manager: EntitiesManager) -> Result<()> {
let EntitiesManagerComponents {
toplevel_entities,
descriptions,
} = manager.decompose();
let md_output_dir = base_dir.join("markdown");
let html_output_dir = base_dir.join("html");
std::fs::create_dir_all(&md_output_dir)
.context("Failed to create the markdown output directory")?;
std::fs::create_dir_all(&html_output_dir)
.context("Failed to create the HTML output directory")?;
let pool = ThreadPool::new(num_cpus::get());
let descriptions = Arc::new(descriptions);
let (tx, rx) = channel::<()>();
for (usr, entity) in toplevel_entities {
generate_recursively(
usr,
entity,
pool.clone(),
tx.clone(),
descriptions.clone(),
&md_output_dir,
&html_output_dir,
);
}
drop(tx);
// This is not really idiomatic, but iter returns None when every Sender is destroyed, so just
// by passing around Senders in generate_recursively, we wait for every job.
rx.iter().for_each(drop);
Ok(())
}
fn generate_recursively(
usr: Usr,
entity: Entity,
pool: ThreadPool,
tx: std::sync::mpsc::Sender<()>,
descriptions: Arc<HashMap<Usr, Description>>,
md_output_dir: impl AsRef<Path>,
html_output_dir: impl AsRef<Path>,
) {
let descriptions = descriptions.clone();
let md_output_dir = md_output_dir.as_ref().to_owned();
let html_output_dir = html_output_dir.as_ref().to_owned();
let pool2 = pool.clone();
pool.execute(move || {
trace!("Trying to generate {}", usr.0);
let entity = Described::<Entity> {
entity,
description: descriptions.get(&usr).unwrap().clone(),
};
let leftovers = generate_single(
&usr,
entity,
&descriptions,
&md_output_dir,
&html_output_dir,
)
.unwrap();
for (usr, entity) in leftovers {
let pool = pool2.clone();
let tx = tx.clone();
generate_recursively(
usr,
entity,
pool,
tx,
descriptions.clone(),
md_output_dir.clone(),
html_output_dir.clone(),
);
}
});
}
fn generate_single(
usr: &Usr,
entity: Described<Entity>,
descriptions: &HashMap<Usr, Description>,
md_output_dir: impl AsRef<Path>,
html_output_dir: impl AsRef<Path>,
) -> Result<HashMap<Usr, Entity>> {
use std::io::prelude::*;
use std::process::{Command, Stdio};
let md_output_file = md_output_dir.as_ref().join(&usr.0);
let html_output_file = html_output_dir.as_ref().join(&usr.0);
let mut command = Command::new("pandoc");
command
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.args(&[
"--from=json",
"--to=markdown",
"--output",
md_output_file
.to_str()
.context("Entity name is not valid UTF-8")?,
]);
debug!("Launching command: {:?}", command);
let mut pandoc = command
.spawn()
.context("Failed to execute Pandoc command")?;
let (pandoc_ast, leftovers) = entity.into_pandoc(&descriptions);
if log_enabled!(log::Level::Trace) {
let json =
serde_json::to_string(&pandoc_ast).context("Failed to convert Pandoc AST to JSON")?;
trace!("Sending json: {}", json);
write!(
pandoc.stdin.as_mut().expect("Pandoc stdin not captured"),
"{}",
&json,
)
.context("Failed to convert Pandoc AST to JSON")?;
} else {
serde_json::to_writer(
pandoc.stdin.as_mut().expect("Pandoc stdin not captured"),
&pandoc_ast,
)
.context("Failed to convert Pandoc AST to JSON")?;
}
let output = pandoc
.wait_with_output()
.expect("Pandoc command wasn't running");
if !output.status.success() {
Err(CommandError {
status: output.status,
stderr: String::from_utf8(output.stderr).expect("Pandoc outputted invalid UTF-8"),
})
.context("Pandoc command failed")?;
}
let mut command = Command::new("pandoc");
command
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.args(&[
"--from=markdown",
"--to=html",
"--css=res/style.css",
"--standalone",
"--self-contained",
md_output_file
.to_str()
.context("Entity name is not valid UTF-8")?,
"--output",
html_output_file
.to_str()
.context("Entity name is not valid UTF-8")?,
]);
debug!("Launching command: {:?}", command);
let output = command
.output()
.context("Failed to execute Pandoc command")?;
if !output.status.success() {
Err(CommandError {
status: output.status,
stderr: String::from_utf8(output.stderr).expect("Pandoc outputted invalid UTF-8"),
})
.context("Pandoc command failed")?;
}
Ok(leftovers)
}
#[derive(Debug, Clone, Error)]
#[error("Command returned status {:?} and stderr {:?}", status, stderr)]
struct CommandError {
status: std::process::ExitStatus,
stderr: String,
}
|
