1 files changed, 41 insertions, 0 deletions
diff --git a/bundle/src-tauri/src/compiler.rs b/bundle/src-tauri/src/compiler.rs
new file mode 100644
index 0000000..275a707
--- /dev/null
+++ b/bundle/src-tauri/src/compiler.rs
@@ -0,0 +1,41 @@
+use std::path::PathBuf;
+
+// Keep startup failures available to the UI, including an unwritable working directory.
+pub struct Compiler(pub Result<PathBuf, String>);
+
+impl Compiler {
+    pub fn load() -> Self {
+        Self(executable().map_err(|error| format!("Cannot load compiler: {error}")))
+    }
+}
+
+#[cfg(not(windows))]
+fn executable() -> std::io::Result<PathBuf> {
+    Ok(std::env::current_exe()?.with_file_name("cpsc"))
+}
+
+#[cfg(windows)]
+fn executable() -> std::io::Result<PathBuf> {
+    use std::{
+        fs::{self, File},
+        io,
+    };
+
+    let directory = std::env::current_dir()?;
+    let destination = directory.join("cpsc.exe");
+    let staged = directory.join(format!(".cpsc-{}.tmp", std::process::id()));
+    let result = (|| {
+        let mut compressed = flate2::read::GzDecoder::new(
+            &include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/binaries/cpsc.exe.gz"))[..],
+        );
+        let mut file = File::create(&staged)?;
+        io::copy(&mut compressed, &mut file)?;
+        drop(file);
+        fs::rename(&staged, &destination)?;
+        Ok(destination)
+    })();
+    if result.is_err() {
+        let _ = fs::remove_file(staged);
+    }
+    result
+}