From 3727cb2f62bd4da9363be21fea37e392c0807fcc Mon Sep 17 00:00:00 2001
From: Sebastian Kuzminsky <seb@highlab.com>
Date: Sat, 23 Sep 2023 13:28:57 -0600
Subject: [PATCH] fix cmake syntax for finding credentials.cmake

When building this project from another cmake project, I get an error
even though I have credentials.cmake (this is on Debian Bookworm using
cmake 3.25):

    CMake Warning at pico-w-webserver-example/CMakeLists.txt:24 (message):
      Credentials file not found, using default values!

Per the cmake docs, `if EXISTS` requires full/absolute paths; relative
paths do not have well-defined behavior:

    <https://cmake.org/cmake/help/latest/command/if.html#exists>
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9856d5d..6dd59c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ set(PICO_SDK_FETCH_FROM_GIT on)
 include(cmake/pico_sdk_import.cmake)
 
 
-if(EXISTS cmake/credentials.cmake)
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/cmake/credentials.cmake)
     # copy it over from cmake/credentials.cmake.example
     include(cmake/credentials.cmake)
 else()