refactor: split csv writing to func

src/main.rs

@@ -336,6 +336,38 @@ impl PsbQaqcResult {
 //         .collect_vec()
 // }
 
+fn write_psbqaqc_csv(result: MasterLogResult, outfile: PathBuf) -> Result<()> {
+    let expanded_results = PsbQaqcResult::from_masterlogresult(result);
+
+    let mut wtr = match outfile.exists() {
+        true => {
+            let file = File::options()
+                .read(true)
+                .append(true)
+                .open(outfile.clone())?;
+            csv::WriterBuilder::new()
+                .has_headers(false)
+                .from_writer(file)
+        }
+        false => {
+            println!("Creating new file: {}", outfile.display());
+            let file = File::options()
+                .create_new(true)
+                .write(true)
+                .open(outfile.clone())?;
+            csv::WriterBuilder::new()
+                .has_headers(true)
+                .from_writer(file)
+        }
+    };
+    for result in expanded_results {
+        wtr.serialize(result)?;
+    }
+    wtr.flush()?;
+
+    Ok(())
+}
+
 fn main() -> Result<()> {
     let args = Args::parse();
     env_logger::Builder::new()
@@ -361,27 +393,7 @@ fn main() -> Result<()> {
 
             let outfile = outfile.unwrap_or(get_output_filename(&result));
 
-            let expanded_results = PsbQaqcResult::from_masterlogresult(result);
+            write_psbqaqc_csv(result, outfile)?;
-
-            let mut wtr = match outfile.exists() {
-                true => {
-                    let file = File::options().read(true).append(true).open(outfile)?;
-                    csv::WriterBuilder::new()
-                        .has_headers(false)
-                        .from_writer(file)
-                }
-                false => {
-                    println!("Creating new file: {}", outfile.display());
-                    let file = File::options().create_new(true).write(true).open(outfile)?;
-                    csv::WriterBuilder::new()
-                        .has_headers(true)
-                        .from_writer(file)
-                }
-            };
-            for result in expanded_results {
-                wtr.serialize(result)?;
-            }
-            wtr.flush()?;
         }
         Commands::CheckDB { csvfile } => {
             // TODO: more friendly message (like row number)