From: Scott Worley <scottworley@scottworley.com>
Date: Tue, 10 Oct 2023 23:51:57 +0000 (-0700)
Subject: server: Only write CSV headers when initially creating the log file
X-Git-Tag: v0.1.0~9
X-Git-Url: http://git.scottworley.com/tattlekey/commitdiff_plain/7a3bc82f02480088052d4d583c89b7cd9c90f8cf

server: Only write CSV headers when initially creating the log file
---

diff --git a/server/src/main.rs b/server/src/main.rs
index 62ef41e..573edc5 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -81,12 +81,15 @@ impl Range {
 }
 
 fn main() {
+    let log_file_exists = std::path::Path::new(LOGFILENAME).exists();
     let logfile = std::fs::OpenOptions::new()
-        .create(true)
+        .create_new(!log_file_exists)
         .append(true)
         .open(LOGFILENAME)
         .expect("Coudln't open log file");
-    let mut log = csv::Writer::from_writer(logfile);
+    let mut log = csv::WriterBuilder::new()
+        .has_headers(!log_file_exists)
+        .from_writer(logfile);
     let mut presses = HashMap::<MessageKey, Range>::new();
     let socket = UdpSocket::bind("0.0.0.0:29803").expect("couldn't bind to address");
     loop {