v0.3.7-pre.002

crates/ksp-app-backfill-desk/src/main.rs

@@ -0,0 +1,58 @@
+// file: crates/ksp-app-backfill-desk/src/main.rs
+// version: 1
+
+//! Binary entry point for the KSP Backfill desktop application.
+
+#![forbid(unsafe_code)]
+#![deny(unreachable_pub)]
+#![warn(missing_docs)]
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use fs2::FileExt; // rust-rules: trait-import
+
+fn main() -> std::process::ExitCode {
+    let working_directory = configure_runtime_working_directory();
+    if let std::result::Result::Err(error) = working_directory {
+        eprintln!("cannot configure Backfill Desk runtime working directory: {error}");
+        return std::process::ExitCode::FAILURE;
+    }
+    let mut lock_path = std::env::temp_dir();
+    lock_path.push("com_sasedev_ksp_app_backfill_desk.lock");
+    let lock_file = match std::fs::OpenOptions::new().read(true).write(true).create(true).truncate(false).open(&lock_path) {
+        std::result::Result::Ok(file) => file,
+        std::result::Result::Err(error) => {
+            eprintln!("cannot create application lock '{}': {error}", lock_path.display());
+            return std::process::ExitCode::FAILURE;
+        },
+    };
+    if let std::result::Result::Err(error) = lock_file.try_lock_exclusive() {
+        if error.kind() == std::io::ErrorKind::WouldBlock {
+            eprintln!("another ksp-app-backfill-desk instance is already running");
+            return std::process::ExitCode::FAILURE;
+        }
+        eprintln!("cannot acquire application lock '{}': {error}", lock_path.display());
+        return std::process::ExitCode::FAILURE;
+    }
+    let _lock_file = lock_file;
+    let arguments = std::env::args_os().collect::<std::vec::Vec<std::ffi::OsString>>();
+    let run_result = ksp_app_backfill_desk_lib::run(arguments.as_slice());
+    return match run_result {
+        std::result::Result::Ok(()) => std::process::ExitCode::SUCCESS,
+        std::result::Result::Err(error) => {
+            eprintln!("application error: {error}");
+            std::process::ExitCode::FAILURE
+        },
+    };
+}
+
+fn configure_runtime_working_directory() -> std::io::Result<()> {
+    #[cfg(debug_assertions)]
+    {
+        let workspace_root = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../..");
+        return std::env::set_current_dir(workspace_root);
+    }
+    #[cfg(not(debug_assertions))]
+    {
+        return std::result::Result::Ok(());
+    }
+}