From 7ce96a92bdb9640fb61d89b768efb291ba5777cf Mon Sep 17 00:00:00 2001
From: cos <cos>
Date: Tue, 6 Jun 2023 11:26:00 +0200
Subject: Make it possible to run tests sequentially

---
 run-tests | 40 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/run-tests b/run-tests
index 92f93fe0..f4c54c16 100755
--- a/run-tests
+++ b/run-tests
@@ -32,6 +32,7 @@ run_vim_80_tests=1
 run_vim_90_tests=1
 run_linters=1
 use_docker=1
+run_parallell=1
 
 while [ $# -ne 0 ]; do
     case $1 in
@@ -130,6 +131,7 @@ while [ $# -ne 0 ]; do
         echo '  --fast            Run only the fastest Vim and custom checks'
         echo '  --help            Show this help text'
         echo '  --no-docker       Skip using Docker (unsupported)'
+        echo '  --no-parallell    Run all tests sequentially'
         echo '  --                Stop parsing options after this'
         exit 0
     ;;
@@ -138,6 +140,10 @@ while [ $# -ne 0 ]; do
         docker_flag='--no-docker'
         shift
     ;;
+    --no-parallell)
+        run_parallell=0
+        shift
+    ;;
     --)
         shift
         break
@@ -253,6 +259,22 @@ available_vims() {
     fi
 }
 
+tail_and_wait() {
+    tries=0
+    while [ "$tries" -lt 5 ]; do
+        tries=$((tries + 1))
+        [ -e "$1" ] || { sleep 2; continue; }
+
+        tail -f "$1" &
+        tail_pid=$!
+        wait "$2"
+        kill $tail_pid
+        return 0
+    done
+
+    echo "Log file $1 did not get created within a reasonable time." >&2
+}
+
 for vim in $( available_vims ); do
     if ( [[ "$vim" =~ ^vim-v8.0 ]] && ((run_vim_80_tests)) ) \
     || ( [[ "$vim" =~ ^vim-v9.0 ]] && ((run_vim_90_tests)) ) \
@@ -264,7 +286,11 @@ for vim in $( available_vims ); do
         file_number=$((file_number+1))
         test/script/run-vader-tests $quiet_flag $verbose_flag $docker_flag \
             "${vim#*=}" "$tests" > "$output_dir/$file_number" 2>&1 &
-        pid_list="$pid_list $!"
+        if [ "$run_parallell" -eq 1 ]; then
+            pid_list="$pid_list $!"
+        else
+            tail_and_wait "$output_dir/$file_number" $!
+        fi
     fi
 done
 
@@ -272,12 +298,20 @@ if ((run_linters)); then
     echo "Starting Vint..."
     file_number=$((file_number+1))
     test/script/run-vint $docker_flag > "$output_dir/$file_number" 2>&1 &
-    pid_list="$pid_list $!"
+    if [ "$run_parallell" -eq 1 ]; then
+        pid_list="$pid_list $!"
+    else
+        tail_and_wait "$output_dir/$file_number" $!
+    fi
 
     echo "Starting Custom checks..."
     file_number=$((file_number+1))
     test/script/custom-checks &> "$output_dir/$file_number" 2>&1 &
-    pid_list="$pid_list $!"
+    if [ "$run_parallell" -eq 1 ]; then
+        pid_list="$pid_list $!"
+    else
+        tail_and_wait "$output_dir/$file_number" $!
+    fi
 fi
 
 echo
-- 
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