Slight tweak to avoid empty html directory being installed

docs/developer-guide/CMakeLists.txt

@@ -53,8 +53,12 @@ ADD_CUSTOM_TARGET(developer-guide-pdf
 
 # Install output, if it is generated.
 INSTALL(CODE "IF (EXISTS ${DEVGUIDE}/html)
-    FILE(INSTALL ${DEVGUIDE}/html
-         DESTINATION \${CMAKE_INSTALL_PREFIX}/${NEKTAR_DOC_DIR}/developers-guide)
+    FILE(GLOB DGHTML ${DEVGUIDE}/html/*)
+    LIST(LENGTH DGHTML DGHTML_LEN)
+    IF(DGHTML_LEN GREATER 0)
+        FILE(INSTALL ${DEVGUIDE}/html
+             DESTINATION \${CMAKE_INSTALL_PREFIX}/${NEKTAR_DOC_DIR}/developers-guide)
+    ENDIF()
 ENDIF()
 IF (EXISTS ${DEVGUIDE}/developers-guide.pdf)
     FILE(INSTALL ${DEVGUIDE}/developers-guide.pdf

docs/developer-guide/preface/preface.tex

@@ -97,8 +97,7 @@ This developer's guide, like most of \nek{}, is not due to one sole person but a
 \paragraph{Spencer J. Sherwin}: Prof. Spencer Sherwin is a Professor of Computational Fluid Mechanics in the Department of Aeronautics at Imperial
 College London (UK).
 
-\paragraph{Chris D. Cantwell}: Dr. Chris Cantwell is a Research Fellow in the Department of Aeronautics at Imperial
-College London (UK).
+\paragraph{Chris D. Cantwell}: Dr. Chris Cantwell is a Senior Lecturer in Aeronautics in the Department of Aeronautics at Imperial College London (UK).
 
 \paragraph{David Moxey}: Dr. David Moxey is a Senior Lecturer in Engineering in the College of Engineering, Mathematics and Physical Sciences
 at the University of Exeter (UK).

docs/user-guide/CMakeLists.txt

@@ -54,8 +54,12 @@ ADD_CUSTOM_TARGET(user-guide-pdf
 
 # Install output, if it is generated.
 INSTALL(CODE "IF (EXISTS ${USERGUIDE}/html)
-    FILE(INSTALL ${USERGUIDE}/html
-         DESTINATION \${CMAKE_INSTALL_PREFIX}/${NEKTAR_DOC_DIR}/user-guide)
+    FILE(GLOB UGHTML ${USERGUIDE}/html/*)
+    LIST(LENGTH UGHTML UGHTML_LEN)
+    IF(UGHTML_LEN GREATER 0)
+        FILE(INSTALL ${USERGUIDE}/html
+             DESTINATION \${CMAKE_INSTALL_PREFIX}/${NEKTAR_DOC_DIR}/user-guide)
+    ENDIF()
 ENDIF()
 IF (EXISTS ${USERGUIDE}/user-guide.pdf)
     FILE(INSTALL ${USERGUIDE}/user-guide.pdf