Split crates and clean up structure of codebase (#294)

Co-authored-by: Jiahao XU <Jiahao_XU@outlook.com>

crates/bin/src/main.rs

@@ -0,0 +1,78 @@
+use std::{
+    process::{ExitCode, Termination},
+    time::{Duration, Instant},
+};
+
+use binstall::{
+    errors::BinstallError,
+    helpers::{
+        jobserver_client::LazyJobserverClient, signal::cancel_on_user_sig_term,
+        tasks::AutoAbortJoinHandle,
+    },
+};
+use log::{debug, error, info};
+use tokio::runtime::Runtime;
+
+mod args;
+mod entry;
+mod install_path;
+mod ui;
+
+#[cfg(feature = "mimalloc")]
+#[global_allocator]
+static GLOBAL: mimalloc::MiMalloc = mimalloc::MiMalloc;
+
+fn main() -> MainExit {
+    // This must be the very first thing to happen
+    let jobserver_client = LazyJobserverClient::new();
+
+    let args = match args::parse() {
+        Ok(args) => args,
+        Err(err) => return MainExit::Error(err),
+    };
+
+    ui::logging(&args);
+
+    let start = Instant::now();
+
+    let result = {
+        let rt = Runtime::new().unwrap();
+        let handle =
+            AutoAbortJoinHandle::new(rt.spawn(entry::install_crates(args, jobserver_client)));
+        rt.block_on(cancel_on_user_sig_term(handle))
+    };
+
+    let done = start.elapsed();
+    debug!("run time: {done:?}");
+
+    result.map_or_else(MainExit::Error, |res| {
+        res.map(|()| MainExit::Success(done)).unwrap_or_else(|err| {
+            err.downcast::<BinstallError>()
+                .map(MainExit::Error)
+                .unwrap_or_else(MainExit::Report)
+        })
+    })
+}
+
+enum MainExit {
+    Success(Duration),
+    Error(BinstallError),
+    Report(miette::Report),
+}
+
+impl Termination for MainExit {
+    fn report(self) -> ExitCode {
+        match self {
+            Self::Success(spent) => {
+                info!("Done in {spent:?}");
+                ExitCode::SUCCESS
+            }
+            Self::Error(err) => err.report(),
+            Self::Report(err) => {
+                error!("Fatal error:");
+                eprintln!("{err:?}");
+                ExitCode::from(16)
+            }
+        }
+    }
+}