restored environment functionality

python/damask/__init__.py

@@ -6,6 +6,7 @@ with open(os.path.join(os.path.dirname(__file__),'VERSION')) as f:
     version = f.readline().strip()
 
 # classes
+from .environment import Environment      # noqa
 from .table       import Table            # noqa
 from .asciitable  import ASCIItable       # noqa
     

python/damask/environment.py

@@ -0,0 +1,29 @@
+import os
+import re
+
+class Environment():
+    __slots__ = [ \
+                  'options',
+                ]
+
+    def __init__(self):
+        """Read and provide values of DAMASK configuration."""
+        self.options = {}
+        self.get_options()
+
+    def relPath(self,relative = '.'):
+        return os.path.join(self.rootDir(),relative)
+
+    def rootDir(self):
+        return os.path.normpath(os.path.join(os.path.realpath(__file__),'../../../'))
+
+    def get_options(self):
+        with open(self.relPath(self.rootDir()+'/CONFIG')) as configFile:
+            for line in configFile:
+                line = line.strip()
+                line = line[4:] if line.startswith('set ') else line                                   # remove "set" (tcsh) when setting variables
+                if line and not line.startswith('#'):
+                    items = re.split(r'\s*=\s*',line)
+                    if len(items) == 2: 
+                        self.options[items[0].upper()] = \
+                          re.sub(r'${*DAMASK_ROOT}*',self.rootDir(),os.path.expandvars(items[1]))      # expand all shell variables and DAMASK_ROOT