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lib.rs
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use cargo::core::compiler::{CompileMode, Executor};
use cargo::core::{PackageId, Shell, Target, Verbosity, Workspace};
use cargo::ops::{compile_with_exec, CompileOptions};
use cargo::util::errors::CargoResult;
use cargo::util::{homedir, GlobalContext};
use cargo_util::ProcessBuilder;
use http::response::Builder as ResponseBuilder;
use http::{header, StatusCode};
use hyper::server::conn::http1;
use hyper::service::service_fn;
use hyper::{Request, Response};
use hyper_staticfile::Body;
use hyper_staticfile::Static;
use hyper_util::rt::tokio::TokioIo;
use std::path::PathBuf;
use std::sync::Arc;
use tokio::net::TcpListener;
/// run `cargo doc` with extra args
#[allow(dead_code)]
pub async fn run_cargo_doc(args: &Vec<String>) -> std::process::ExitStatus {
// std::io::Result<> {
// async fn main() -> {
let mut cmd = tokio::process::Command::new("cargo");
cmd.arg("doc").args(args);
let stdcmd = cmd.as_std();
log::info!(
"Running {} {}",
stdcmd.get_program().to_string_lossy(),
stdcmd
.get_args()
.map(|s| s.to_string_lossy().to_string())
.collect::<Vec<String>>()
.join(" ")
);
let mut child = tokio::process::Command::new("cargo")
.arg("doc")
.args(args)
.spawn()
.expect("failed to run `cargo doc`");
child.wait().await.expect("failed to wait")
}
/// handle crate doc request with redirect on `/`
///
/// <https://github.com/stephank/hyper-staticfile/blob/HEAD/examples/doc_server.rs>
#[allow(dead_code)]
pub async fn handle_crate_request<B>(
req: Request<B>,
static_: Static,
crate_name: String,
) -> Result<Response<Body>, std::io::Error> {
let target = if let Some(query) = req.uri().query() {
format!("/{crate_name}/?{query}")
} else {
format!("/{crate_name}/")
};
match req.uri().path() {
"/" => Ok(ResponseBuilder::new()
.status(StatusCode::FOUND)
.header(header::LOCATION, target)
.body(Body::Empty)
.expect("unable to build response")),
_ => static_.clone().serve(req).await,
}
}
/// serve rust book / std doc on `addr`
#[allow(dead_code)]
pub async fn serve_rust_doc(addr: &std::net::SocketAddr) -> Result<(), anyhow::Error> {
Ok(serve_rustbook(addr).await?)
}
/// get crate info
#[allow(dead_code)]
pub fn get_crate_info(manifest_path: &PathBuf) -> Result<(String, PathBuf), anyhow::Error> {
let mut shell = Shell::default();
shell.set_verbosity(Verbosity::Quiet);
let cwd = std::env::current_dir()?;
let cargo_home_dir = homedir(&cwd).expect("Errror locating homedir");
let config = GlobalContext::new(shell, cwd, cargo_home_dir);
let workspace = Workspace::new(manifest_path, &config).expect("Error making workspace");
let mut compile_opts = CompileOptions::new(
&config,
CompileMode::Doc {
deps: true,
json: false,
},
)
.expect("Making CompileOptions");
// set to Default, otherwise cargo will complain about virtual manifest:
//
// https://docs.rs/cargo/latest/src/cargo/core/workspace.rs.html#265-275
// https://docs.rs/cargo/latest/src/cargo/ops/cargo_compile.rs.html#125-184
compile_opts.spec = cargo::ops::Packages::Default;
// reference:
// https://docs.rs/cargo/latest/src/cargo/ops/cargo_doc.rs.html#18-34
/// A `DefaultExecutor` calls rustc without doing anything else. It is Cargo's
/// default behaviour.
#[derive(Copy, Clone)]
struct DefaultExecutor;
impl Executor for DefaultExecutor {
fn exec(
&self,
_cmd: &ProcessBuilder,
_id: PackageId,
_target: &Target,
_mode: CompileMode,
_on_stdout_line: &mut dyn FnMut(&str) -> CargoResult<()>,
_on_stderr_line: &mut dyn FnMut(&str) -> CargoResult<()>,
) -> CargoResult<()> {
// cmd.exec_with_streaming(on_stdout_line, on_stderr_line, false).map(drop)
Ok(())
}
}
let exec: Arc<dyn Executor> = Arc::new(DefaultExecutor);
let compilation = compile_with_exec(&workspace, &compile_opts, &exec)?;
let root_crate_names = &compilation.root_crate_names;
let crate_doc_dir = workspace.target_dir().join("doc").into_path_unlocked();
let crate_name = root_crate_names
.get(0)
.ok_or_else(|| anyhow::anyhow!("no crates with documentation"))?;
Ok((crate_name.to_string(), crate_doc_dir))
}
/// serve crate doc on `addr`
#[allow(dead_code)]
pub async fn serve_crate_doc(
manifest_path: &PathBuf,
addr: &std::net::SocketAddr,
) -> Result<(), anyhow::Error> {
let (crate_name, crate_doc_dir) = get_crate_info(manifest_path)?;
let crate_doc_dir = Static::new(crate_doc_dir.clone());
let crate_name = crate_name.clone();
let handler =
service_fn(move |req| handle_crate_request(req, crate_doc_dir.clone(), crate_name.clone()));
let listener = TcpListener::bind(addr)
.await
.expect("Failed to create TCP listener");
loop {
let (tcp, _) = listener.accept().await?;
let io = TokioIo::new(tcp);
let service = handler.clone();
tokio::task::spawn(async move {
if let Err(err) = http1::Builder::new().serve_connection(io, service).await {
println!("Failed to serve connection: {:?}", err);
}
});
}
}
/// find rust book location
///
/// Some("/home/aaron/.rustup/toolchains/nightly-2021-12-13-x86_64-unknown-linux-gnu/share/doc/rust/html")
pub fn find_rustdoc() -> Option<PathBuf> {
let output = std::process::Command::new("rustup")
.arg("which")
.arg("rustdoc")
.output()
.ok()?;
if output.status.success() {
Some(PathBuf::from(String::from_utf8(output.stdout).ok()?))
} else {
None
}
.and_then(|rustdoc| {
Some(
rustdoc
.parent()?
.parent()?
.join("share")
.join("doc")
.join("rust")
.join("html"),
)
})
}
/// static request handler
///
/// <https://github.com/stephank/hyper-staticfile/blob/HEAD/examples/doc_server.rs>
#[allow(dead_code)]
pub async fn handle_request<B>(
req: Request<B>,
static_: Static,
) -> Result<Response<Body>, std::io::Error> {
static_.clone().serve(req).await
}
/// serve rust book on `addr`
#[allow(dead_code)]
pub async fn serve_rustbook(addr: &std::net::SocketAddr) -> Result<(), anyhow::Error> {
let rustdoc_dir = find_rustdoc().expect("Error locating rustdoc");
Ok(serve_dir(&rustdoc_dir, addr).await?)
}
/// serve `dir` on `addr`
#[allow(dead_code)]
pub async fn serve_dir(dir: &PathBuf, addr: &std::net::SocketAddr) -> Result<(), anyhow::Error> {
let dir = Static::new(dir.clone());
let handler = service_fn(move |req| handle_request(req, dir.clone()));
let listener = TcpListener::bind(addr)
.await
.expect("Failed to create TCP listener");
loop {
let (tcp, _) = listener.accept().await?;
let io = TokioIo::new(tcp);
let service = handler.clone();
tokio::task::spawn(async move {
if let Err(err) = http1::Builder::new().serve_connection(io, service).await {
println!("Failed to serve connection: {:?}", err);
}
});
}
}