From f7f231244c91ac980b0c06abdc66d25e4ca904b4 Mon Sep 17 00:00:00 2001
From: Ethan Marshall <ethan@ethanjmarshall.co.uk>
Date: Wed, 24 Jan 2024 16:43:13 +0000
Subject: [PATCH] Fix bad script input buffering strategy

---
 pajen.go | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/pajen.go b/pajen.go
index 8776de7..6867549 100644
--- a/pajen.go
+++ b/pajen.go
@@ -1,11 +1,11 @@
 package main
 
 import (
+	"bufio"
 	"fmt"
 	"io"
 	"log"
 	"os/exec"
-	"strings"
 )
 
 // Pajen represents an instance of the pajen.pl script running in infinite
@@ -51,22 +51,17 @@ func (r *Pajen) Read(b []byte) (int, error) {
 }
 
 func (r *Pajen) run() {
-	buf := make([]byte, 255)
+	sc := bufio.NewScanner(r.out)
+	sc.Split(bufio.ScanLines)
 
-	for {
-		_, err := r.out.Read(buf)
-		if err != nil {
-			log.Println("pajen read error:", err)
-			return
-		}
-
-		wk := string(buf)
-		lines := strings.Split(wk, "\n")
-
-		for _, l := range lines {
-			if l != "" && l != "\n" {
-				r.Chan <- l
-			}
+	for sc.Scan() {
+		l := sc.Text()
+		if l != "" && l != "\n" {
+			r.Chan <- l
 		}
 	}
+
+	if sc.Err() != nil {
+		log.Println("pajen: output read error: %s", sc.Err())
+	}
 }