Support a ./cli script which provides a full-path to the freshly-compiled whck

cli

@@ -0,0 +1,22 @@
+#! /usr/bin/env bash
+
+SCRIPTDIR="$(dirname "$0")"
+
+if [ -f "$SCRIPTDIR"/target/release/whck ]; then
+    output="$(cargo build --release 2>&1)"
+    if [ $? -eq 0 ]; then
+        # Build succeeded echo path to binary
+        echo "$SCRIPTDIR"/target/release/whck
+    else
+        echo "$output"
+        exit 1
+    fi
+else
+    output="$(cargo build 2>&1)"
+    if [ $? -eq 0 ]; then
+        echo "$SCRIPTDIR"/target/debug/whck
+    else
+        echo "$output"
+        exit 1
+    fi
+fi

spec

@@ -1 +1 @@
-Subproject commit 71804c4b3a5f19bb53fdab0bbcecb39ed0919aca
+Subproject commit 9b18c0e162a904f6760fb8ce6516f71c883f75d8

test.sh

@@ -5,7 +5,7 @@ ORIGDIR="$(pwd)"
 
 if [ ! -f "$SCRIPTDIR"/spec/test_cli.sh ]; then
     echo "Submodule not cloned yet. Doing it now"
-    cd $SCRIPTDIR
+    cd "$SCRIPTDIR"
     git submodule init
     if ! git submodule update; then
         echo "Failed to download submodules. Are you connected to the internet?"
@@ -13,12 +13,17 @@ if [ ! -f "$SCRIPTDIR"/spec/test_cli.sh ]; then
     fi
 fi
 
-if [ -f "$SCRIPTDIR"/target/release/whck ]; then
-    cargo build --release
-    "$SCRIPTDIR"/spec/test_cli.sh "$SCRIPTDIR"/target/release/whck
+# If ./cli succeeds, it contains a path to the executable
+# Otherwise it may contain build error messages
+executable="$("$SCRIPTDIR"/cli)"
+if [ $? -eq 0 ]; then
+    "$SCRIPTDIR"/spec/test_cli.sh "$executable"
+    status=$?
 else
-    cargo build
-    "$SCRIPTDIR"/spec/test_cli.sh "$SCRIPTDIR"/target/debug/whck
+    status=1
+    echo "Build failed. OUTPUT:"
+    echo "$output"
 fi
 
 cd "$ORIGDIR"
+exit $status