Simplify doctest download workaround

c4fs.spec

@@ -55,24 +55,26 @@ applications that use c4fs.
 %autosetup -n c4fs-%{commit} -p1
 
 # Remove/unbundle additional dependencies
+
 # c4project (CMake build scripts)
-rm -rvf ext/c4core/cmake
-cp -rvp %{_datadir}/cmake/c4project ext/c4core/cmake
-# Patch out download of doctest:
-awk '/^    if\(_DOCTEST\)$/ { x=1 }
-     x != 1
-     x == 1 && /^    endif\(\)$/ { x=0 }' \
-    '%{_datadir}/cmake/c4project/c4Project.cmake' \
-  > 'ext/c4core/cmake/c4Project.cmake'
-# This comment fixes confused vim syntax highlighting: '
+find ext
+cp -rp '%{_datadir}/cmake/c4project' ext/c4core/cmake
+
 # Do not try to link against a nonexistent doctest library (doctest is
 # header-only, and we do not have the complete CMake project for doctest that
 # would provide a target that knows this):
-sed -r -i 's/\bdoctest\b//' test/CMakeLists.txt
+sed -r -i \
+    -e 's/(LIBS.*)\bdoctest\b/\1/' \
+    -e 's/(c4_setup_testing\()DOCTEST\)/\1\)/' \
+    test/CMakeLists.txt
 
 
 %build
-%cmake -DC4FS_BUILD_TESTS=ON -GNinja
+# We can stop the CMake scripts from downloading doctest by setting
+# C4FS_CACHE_DOWNLOAD_DOCTEST to any directory that exists.
+%cmake -GNinja \
+  -DC4FS_CACHE_DOWNLOAD_DOCTEST:PATH=/ \
+  -DC4FS_BUILD_TESTS=ON
 %cmake_build