From 48e74865011722a7ac0ca3e1b45ea407f8c79db5 Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Sun, 30 Apr 2017 20:06:53 +0200
Subject: only print vars that has value

---
 aports-cache.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/aports-cache.c b/aports-cache.c
index 7a50e6e..c14860a 100644
--- a/aports-cache.c
+++ b/aports-cache.c
@@ -46,8 +46,8 @@ int spawn_shell_pipe(char *const argv[], pid_t *pid)
 
 int read_apkbuild(int shellfd, int aportfd, size_t size, const char *name)
 {
-#define ECHO_STR(var)	"echo \" " #var ": $" #var "\"\n"
-#define ECHO_LIST(var)	"echo ' " #var ":'\n" \
+#define ECHO_STR(var)	"[ -n \"$" #var "\" ] && echo \" " #var ": $" #var "\"\n"
+#define ECHO_LIST(var)	"[ -n \"$" #var "\" ] && echo ' " #var ":' && " \
 			"for i in $" #var "; do\n" \
 			"\techo \"  - \\\"$i\\\"\"\n" \
 			"done\n"
-- 
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