Run apt-get update before trying to install clang

crates/arroyo-compiler-service/src/lib.rs

@@ -168,38 +168,19 @@ impl CompileService {
         }
     }
 
-    async fn check_cc(&self) -> anyhow::Result<()> {
-        if binary_present("cc").await {
-            return Ok(());
-        }
-
-        if !bool_config(INSTALL_CLANG_ENV, false) {
-            let error = "UDF compilation requires clang or gcc to be available. Ensure you have a \
-            working C compilation environment.";
-            error!("{}", error);
-            bail!("{}", error);
-        }
-
-        info!(
-            "cc is not available, but required for UDF compilation. Attempting to install clang."
-        );
+    async fn run_command(action: &str, command: &mut Command) -> anyhow::Result<()> {
         let output = timeout(
             Duration::from_secs(2 * 60),
-            Command::new("apt-get")
-                .arg("-y")
-                .arg("install")
-                .arg("clang")
+            command
                 .stdout(Stdio::inherit())
                 .stderr(Stdio::inherit())
                 .output(),
         )
         .await
-        .map_err(|e| anyhow!("Timed out while installing clang for UDF compilation after {e}"))?
-        .map_err(|e| anyhow!("Failed to install clang via apt-get: {e}"))?;
+        .map_err(|e| anyhow!("Timed out while {action} for UDF compilation after {e}"))?
+        .map_err(|e| anyhow!("Failed while {action} via apt-get: {e}"))?;
 
-        if output.status.success() {
-            info!("clang successfully installed...");
-        } else {
+        if !output.status.success() {
             error!(
                 "Failed to install clang, will not be able to compile UDFs\
             \n------------------------------\
@@ -215,6 +196,36 @@ impl CompileService {
 
         Ok(())
     }
+
+    async fn check_cc(&self) -> anyhow::Result<()> {
+        if binary_present("cc").await {
+            return Ok(());
+        }
+
+        if !bool_config(INSTALL_CLANG_ENV, false) {
+            let error = "UDF compilation requires clang or gcc to be available. Ensure you have a \
+            working C compilation environment.";
+            error!("{}", error);
+            bail!("{}", error);
+        }
+
+        info!(
+            "cc is not available, but required for UDF compilation. Attempting to install clang."
+        );
+
+        Self::run_command("updating apt", Command::new("apt-get").arg("update")).await?;
+
+        Self::run_command(
+            "installing clang",
+            Command::new("apt-get")
+                .arg("-y")
+                .arg("install")
+                .arg("clang"),
+        )
+        .await?;
+
+        Ok(())
+    }
 }
 
 fn dylib_path(name: &str, definition: &str) -> String {