apib11: improve module detection, works without install

Author: jmmuller

MMVII/apib11/MMVII.py

@@ -1,10 +1,39 @@
 import os
-mm_install_path = os.path.normpath(os.path.dirname(__file__) + '/../../../MMVII/MMVII')
+import sys
+from pathlib import Path
 
-if os.path.isdir(mm_install_path):
-    print('MMVII path:', mm_install_path)
+mmv2_src_relative_path = '../'
+mmv2_install_relative_path = '../../../MMVII/MMVII'
+
+mm_data_path = None
+
+# test if run from MMVII sources
+test_path = os.path.normpath(os.path.dirname(__file__) + '/' + mmv2_src_relative_path)
+if os.path.isfile(test_path + '/bin/MMVII'):
+    print("Using local MMVII")
+    mm_data_path = os.path.normpath(os.path.dirname(__file__) + '/' + mmv2_src_relative_path)
+    #search for .so file
+    so_path = None
+    for path in Path('build').rglob('_MMVII.*.so'):
+        if so_path is None:
+            so_path = path.parent
+        else :
+            print('Warning: multiple _MMVII.*.so files found in build directory')
+    if so_path is not None:
+        print("Using _MMVII.*.so file from directory ",so_path)
+        sys.path = [ str(so_path) ] + sys.path
+else:
+    # test if installed
+    for p in sys.path:
+        test_path = os.path.normpath(os.path.dirname(__file__) + '/' + mmv2_install_relative_path)
+        if os.path.isfile(test_path + '/bin/MMVII'):
+            mm_data_path = os.path.normpath(os.path.dirname(__file__) + '/' + mmv2_install_relative_path)
+            break
+
+if mm_data_path is not None:
+    print('MMVII path:', mm_data_path)
     from _MMVII import *
-    themodule = MM_Module(mm_install_path)
+    themodule = MM_Module(mm_data_path)
 else:
-    print('Error: please do not run from this directory')
+    print('Error: impossible to find MMVII binary. Error at installation?')