fix: wget timeout does not double

wait-for

@@ -63,6 +63,8 @@ wait_for() {
       ;;
   esac
 
+  TIMEOUT_END=$(($(date +%s) + TIMEOUT))
+
   while :; do
     case "$PROTOCOL" in
       tcp) 
@@ -94,15 +96,13 @@ wait_for() {
       exit 0
     fi
 
-    if [ "$TIMEOUT" -le 0 ]; then
-      break
+    if [ $(date +%s) -ge $TIMEOUT_END ]; then
+      echo "Operation timed out" >&2
+      exit 1
     fi
-    TIMEOUT=$((TIMEOUT - 1))
 
     sleep 1
   done
-  echo "Operation timed out" >&2
-  exit 1
 }
 
 while :; do

wait-for.bats

@@ -2,7 +2,7 @@
 
 @test "google should be immediately found" {
   run ./wait-for google.com:80 -- echo 'success'
-  
+
   [ "$output" = "success" ]
 }
 
@@ -33,6 +33,28 @@
   [ "$output" != "success" ]
 }
 
+@test "wget timeout does not double" {
+  timeout=10
+  cat >delay <<-EOF
+	#!/usr/bin/env bash
+	sleep $((timeout + 1))
+	EOF
+  chmod +x delay
+  nc -lk -p 80 -e $(pwd)/delay & ncpid=$!
+  start_time=$(date +%s)
+  run ./wait-for -t ${timeout} http://localhost/
+  end_time=$(date +%s)
+  kill $ncpid
+  rm -f delay
+
+  [ "$status" != 0 ]
+  [ "$output" = "Operation timed out" ]
+  elapsed=$((end_time - start_time))
+  [ ${elapsed} -ge ${timeout} ]
+  limit=$((timeout * 3 / 2))
+  [ ${elapsed} -lt ${limit} ]
+}
+
 @test "environment variable HOST should be restored for command invocation" {
   HOST=success run ./wait-for -t 1 google.com:80 -- sh -c 'echo "$HOST"'