fail build if we can't build source.zip

build.rs

@@ -1,20 +1,13 @@
 use anyhow::{ensure, Result};
 use std::fs::File;
-use std::io::{self, Write};
+use std::io;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 use zip::ZipWriter;
 
-fn main() {
+fn main() -> Result<()> {
     let out_dir = PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
-    let mut rs_file = File::create(out_dir.join("zip.rs")).unwrap();
-    match attempt(&out_dir) {
-        Ok(()) => writeln!(rs_file, r#"Some(include_bytes!("source.zip"))"#).unwrap(),
-        Err(_) => writeln!(rs_file, "None").unwrap(),
-    }
-}
 
-fn attempt(out_dir: &Path) -> Result<()> {
     let output = Command::new("cargo")
         .args(["package", "--list", "--allow-dirty"])
         .output()?;

src/app.rs

@@ -144,16 +144,17 @@ struct Code {
 }
 
 #[get("/code")]
-fn code() -> Option<Code> {
-    let zip = include!(concat!(env!("OUT_DIR"), "/zip.rs"))?;
-    Some(Code {
+fn code() -> Code {
+    let zip = include_bytes!(concat!(env!("OUT_DIR"), "/source.zip"));
+
+    Code {
         zip,
         content_type: ContentType::ZIP,
         disposition: Header::new(
             "content-disposition",
             r#"attachment; filename="emojos.in.zip""#,
         ),
-    })
+    }
 }
 
 #[get("/static/site.css")]