Fix for ROOT pointing to the installation in LCG

processor/tasks/CROWNFriend.py

@@ -412,7 +412,9 @@ def run(self):
             # the quantities of a scope have to be read from a rootfile of that scope,
             # the scope is the last folder in the path of the rootfile
             scope_inputs = [
-                target for target in rootfiles if target.path.split("/")[-2] == scope
+                target
+                for target in rootfiles
+                if target.path.split("/")[-2] == scope
             ]
             if len(scope_inputs) == 0:
                 raise Exception(f"No input rootfile found for scope {scope}")

processor/tasks/scripts/compile_crown.sh

@@ -36,6 +36,9 @@ mkdir -p "${BUILDDIR}"
 
 # --- CMake Configuration ---
 # We use the compilers and libraries provided by the container's Conda 'env'
+# Pin CMAKE_PREFIX_PATH to the ROOT install found via root-config: on hosts
+# that also have a system ROOT RPM installed, find_package(ROOT) can otherwise
+# silently resolve to that instead of the intended CVMFS/conda install.
 if cmake "${CROWNFOLDER}" \
     -DANALYSIS="${ANALYSIS}" \
     -DCONFIG="${CONFIG}" \
@@ -46,6 +49,7 @@ if cmake "${CROWNFOLDER}" \
     -DTHREADS="${EXECUTABLE_THREADS}" \
     -DINSTALLDIR="${INSTALLDIR}" \
     -DPRODUCTION=True \
+    -DCMAKE_PREFIX_PATH="$(root-config --prefix)" \
     -B"${BUILDDIR}" 2>&1 | tee "${BUILDDIR}/cmake.log"; then
     echo "CMake finished successfully"
 else

processor/tasks/scripts/compile_crown_friends.sh

@@ -34,6 +34,9 @@ mkdir -p "${BUILDDIR}"
 
 # --- CMake Configuration ---
 # We use the compilers and libraries provided by the container's Conda 'env'
+# Pin CMAKE_PREFIX_PATH to the ROOT install found via root-config: on hosts
+# that also have a system ROOT RPM installed, find_package(ROOT) can otherwise
+# silently resolve to that instead of the intended CVMFS/conda install.
 if cmake "${CROWNFOLDER}" \
     -DANALYSIS="${ANALYSIS}" \
     -DCONFIG="${CONFIG}" \
@@ -45,6 +48,7 @@ if cmake "${CROWNFOLDER}" \
     -DPRODUCTION=True \
     -DFRIENDS=true \
     -DQUANTITIESMAP="${QUANTITIESMAP}" \
+    -DCMAKE_PREFIX_PATH="$(root-config --prefix)" \
     -B"${BUILDDIR}" 2>&1 | tee "${BUILDDIR}/cmake.log"; then
     echo "CMake finished successfully"
 else

processor/tasks/scripts/compile_crown_lib.sh

@@ -31,10 +31,14 @@ mkdir -p "${BUILDDIR}"
 
 # --- CMake Configuration ---
 # We use the compilers and libraries provided by the container's Conda 'env'
+# Pin CMAKE_PREFIX_PATH to the ROOT install found via root-config: on hosts
+# that also have a system ROOT RPM installed, find_package(ROOT) can otherwise
+# silently resolve to that instead of the intended CVMFS/conda install.
 if cmake "${CROWNFOLDER}" \
     -DBUILD_CROWNLIB_ONLY=ON \
     -DINSTALLDIR="${INSTALLDIR}" \
     -DANALYSIS="${ANALYSIS}" \
+    -DCMAKE_PREFIX_PATH="$(root-config --prefix)" \
     -B"${BUILDDIR}" 2>&1 | tee "${BUILDDIR}/cmake.log"; then
     echo "CMake finished successful."
 else