Make test/run work better from outside the test/ directory

Allow tests to be provided relative to current directory instead
of relative to the test directory, to make shell path completion
more useful. Properly default to all tests when none are provided.

Author: mawww

test/run

@@ -19,8 +19,9 @@ main() {
         exec -with-hooks <c-l>
       '
 
-  cd "$(dirname $0)"
   root="$PWD"
+  testdir="$(dirname $0)"
+  kak="$(realpath $testdir)/../src/kak"
   tmpdir="${TMPDIR:-/tmp}"
   work=$(mktemp -d $tmpdir/kak-tests.XXXXXXXX)
   session="kak-tests"
@@ -33,7 +34,7 @@ main() {
 
   number_tests=0
   number_failures=0
-  for dir in $(find "${@:-.}" -type d | sed 's|^\./||' | sort); do
+  for dir in $(find "${@:-$testdir}" -type d | sed 's|^\./||' | sort); do
     cd $root/$dir;
     if [ ! -f cmd ]; then
       echo "$dir"
@@ -56,7 +57,7 @@ main() {
       if [ -f env ]; then
         . ./env
       fi
-      exec $DEBUGGER $root/../src/kak out -n -s "$session" -ui json -e "$kak_commands" >ui-out <ui-in
+      exec $DEBUGGER $kak out -n -s "$session" -ui json -e "$kak_commands" >ui-out <ui-in
     ) &
     kakpid=$!
 
@@ -70,7 +71,7 @@ main() {
       ui_out '{ "jsonrpc": "2.0", "method": "set_ui_options", "params": [{}] }'
     fi
 
-    finished_commands |$root/../src/kak -p "$session" 2>/dev/null
+    finished_commands |$kak -p "$session" 2>/dev/null
     cat <&4 >/dev/null
 
     wait $kakpid