[robocop] branch master updated: more logging, harsher error handling

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grothoff pushed a commit to branch master
in repository robocop.

The following commit(s) were added to refs/heads/master by this push:
     new 67ccfc9  more logging, harsher error handling
67ccfc9 is described below

commit 67ccfc97e548203686af985b8115d110d14bf30f
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sun Jun 8 23:11:24 2025 +0200

    more logging, harsher error handling
---
 src/main.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 901cc04..c6ef2ce 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,7 +18,7 @@
 use std::collections::HashMap;
 use std::env;
 use std::fs;
-use std::io::{self, BufRead, BufReader};
+use std::io::{self, Write, BufRead, BufReader};
 use serde_json::{Value, Map};
 
 // Finite State Machine for efficient string matching
@@ -258,20 +258,24 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     for line in reader.lines() {
         let line = line?;
         if line.trim().is_empty() {
-            continue;
+            eprintln!("ERROR: empty input line");
+            std::process::exit(1);
         }
 
         match serde_json::from_str::<Value>(&line) {
             Ok(Value::Object(obj)) => {
+                eprintln!("INFO: robocop received input: {}", line);
                 let (quality, confidence, ssid) = engine.find_best_match(&obj);
                 println!("{:.6} {:.6} {}", quality, confidence, ssid);
+                // Not 100% clear if flush is needed here, but safer.
+                io::stdout().flush().unwrap();
             }
             Ok(_) => {
-                eprintln!("Warning: Skipping non-object JSON: {}", line);
+                eprintln!("ERROR: non-object JSON received: {}", line);
                 std::process::exit(1);
             }
             Err(e) => {
-                eprintln!("Warning: Failed to parse JSON: {} - {}", line, e);
+                eprintln!("ERROR: Failed to parse JSON: {} - {}", line, e);
                 std::process::exit(1);
             }
         }

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