Be able to use 'sass.bat' on Windows.

[rup.git] / backend / build.rs

diff --git a/backend/build.rs b/backend/build.rs
index ba5da7e..8837cfc 100644 (file)
--- a/backend/build.rs
+++ b/backend/build.rs
@@ -5,20 +5,36 @@ What is build here:
  - Compile the SASS file to CSS file.
 */
 
-use std::process::Command;
+use std::{ env, process::{ Command, Output }, path::Path };
+
+fn exists_in_path<P>(filename: P) -> bool
+    where P: AsRef<Path> {
+        for path in env::split_paths(&env::var_os("PATH").unwrap()) {
+            if path.join(&filename).is_file() { return true; }
+        }
+    false
+}
 
 fn main() {
     println!("cargo:rerun-if-changed=style.scss");
 
-    let output =
-        Command::new("sass")
-            .arg("./style.scss")
-            .arg("./static/style.css")
+    fn run_sass(command: &mut Command) -> Output {
+        command
+            .arg("style.scss")
+            .arg("static/style.css")
             .output()
-            .expect("Unable to compile SASS file, install SASS, see https://sass-lang.com/");
+            .expect("Unable to compile SASS file, install SASS, see https://sass-lang.com/")
+    }
+
+    let output =
+        if exists_in_path("sass.bat") {
+            run_sass(Command::new("cmd").args(&["/C", "sass.bat"]))
+        } else {
+            run_sass(&mut Command::new("sass"))
+        };
 
     if !output.status.success() {
-        //panic!("Unable to compile SASS file, install SASS, see https://sass-lang.com/")
+        // SASS will put the error in the file.
         let error = std::fs::read_to_string("./static/style.css").expect("unable to read style.css");
         panic!(error);
     }