Re-Created branch form 0, to avoid conflicts

cMake/FindMatplotlib.cmake

@@ -0,0 +1,48 @@
+# - Find the matplotlib libraries
+# This module finds IF matplotlib is installed, and sets the following variables
+# indicating where it is.
+#
+#  MATPLOTLIB_FOUND            - was matplotlib found
+#  MATPLOTLIB_VERSION          - the version of matplotlib found as a string
+#  MATPLOTLIB_VERSION_MAJOR    - the major version number of matplotlib
+#  MATPLOTLIB_VERSION_MINOR    - the minor version number of matplotlib
+#  MATPLOTLIB_VERSION_PATCH    - the patch version number of matplotlib
+#  MATPLOTLIB_VERSION_DECIMAL  - e.g. version 1.1.1r is 10101
+#  MATPLOTLIB_PATH_DIRS     - path to the matplotlib include files
+
+IF(PYTHONINTERP_FOUND)
+    # Try to import matplotlib into Python interpreter. Python
+    # interpreter was found previously as required package, so
+    # don't take care about this.
+    execute_process(COMMAND "${PYTHON_EXECUTABLE}" "-c"
+        "import matplotlib as m; print(m.__version__); print(m.__path__[0]);"
+        RESULT_VARIABLE _MATPLOTLIB_SEARCH_SUCCESS
+        OUTPUT_VARIABLE _MATPLOTLIB_VALUES
+        ERROR_VARIABLE _MATPLOTLIB_ERROR_VALUE
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    IF(_MATPLOTLIB_SEARCH_SUCCESS MATCHES 0)
+        set(MATPLOTLIB_FOUND TRUE)
+
+        # Convert the process output into a list
+        string(REGEX REPLACE ";" "\\\\;" _MATPLOTLIB_VALUES ${_MATPLOTLIB_VALUES})
+        string(REGEX REPLACE "\n" ";" _MATPLOTLIB_VALUES ${_MATPLOTLIB_VALUES})
+        list(GET _MATPLOTLIB_VALUES 0 MATPLOTLIB_VERSION)
+        list(GET _MATPLOTLIB_VALUES 1 MATPLOTLIB_PATH_DIRS)
+
+        # Make sure all directory separators are '/'
+        string(REGEX REPLACE "\\\\" "/" MATPLOTLIB_PATH_DIRS ${MATPLOTLIB_PATH_DIRS})
+
+        # Get the major and minor version numbers
+        string(REGEX REPLACE "\\." ";" _MATPLOTLIB_VERSION_LIST ${MATPLOTLIB_VERSION})
+        list(GET _MATPLOTLIB_VERSION_LIST 0 MATPLOTLIB_VERSION_MAJOR)
+        list(GET _MATPLOTLIB_VERSION_LIST 1 MATPLOTLIB_VERSION_MINOR)
+        list(GET _MATPLOTLIB_VERSION_LIST 2 MATPLOTLIB_VERSION_PATCH)
+        math(EXPR MATPLOTLIB_VERSION_DECIMAL
+            "(${MATPLOTLIB_VERSION_MAJOR} * 10000) + (${MATPLOTLIB_VERSION_MINOR} * 100) + ${MATPLOTLIB_VERSION_PATCH}")
+    ELSE()
+        set(MATPLOTLIB_FOUND FALSE)
+    ENDIF()
+ELSE()
+    set(MATPLOTLIB_FOUND FALSE)
+ENDIF()