From c64c322c70ea4d30bf9d80b790a125efa277fb27 Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Tue, 12 May 2015 21:45:14 +0000
Subject: More elaborate handling of finding pylmm

---
 wqflask/utility/tools.py | 46 ++++++++++++++++++++++++++++++----------------
 1 file changed, 30 insertions(+), 16 deletions(-)

diff --git a/wqflask/utility/tools.py b/wqflask/utility/tools.py
index 3c972557..3eabd044 100644
--- a/wqflask/utility/tools.py
+++ b/wqflask/utility/tools.py
@@ -6,32 +6,46 @@
 #   PYLMM_PATH finds the root of the git repository of the pylmm_gn2 tool 
 
 import os
+import sys
+from wqflask import app
 
-def get_setting():
+def get_setting(id,default,guess,get_valid_path):
     """
     Resolve a setting from the environment or the global settings in app.config
     """
-    pass
-    
-def pylmm_command(default=None):
-    def get_valid_path(path):
-        if path and os.path.isfile(path+'/lmm.py'):
-            return path
-        else:
-            None
-
     # ---- Check whether environment exists
-    path = get_valid_path(os.environ['PYLMM_PATH'])
+    path = get_valid_path(os.environ.get(id))
     # ---- Check whether setting exists
+    setting = app.config.get(id)
     if not path:
-        path = get_valid_path(app.config.get('PYLMM_PATH'))
+        path = get_valid_path(setting)
     # ---- Check whether default exists
     if not path:
         path = get_valid_path(default)
-    home = get_valid_path(os.environ['HOME']+'/pylmm_gn2')
+    # ---- Guess directory
     if not path:
-        path = get_valid_path(home)
+        if not setting:
+            setting = guess
+        path = get_valid_path(guess)
     if not path:
-        raise Exception('PYLMM_PATH '+home+' unknown or faulty (add PYLMM_PATH to settings.py)')
-    pylmm_command = 'python '+path+'/lmm.py'
+        raise Exception(id+' '+setting+' path unknown or faulty (update settings.py?)')
+
+    return path
+
+def pylmm_command(default=None):
+    """
+    Return the path to the repository and the python command to call
+    """
+    def get_valid_path(path):
+        """Test for a valid repository"""
+        if path:
+            sys.stderr.write("Trying PYLMM_PATH in "+path+"\n")
+        if path and os.path.isfile(path+'/pylmm_gn2/lmm.py'):
+            return path
+        else:
+            None
+
+    guess = os.environ.get('HOME')+'/pylmm_gn2'
+    path = get_setting('PYLMM_PATH',default,guess,get_valid_path)
+    pylmm_command = 'python '+path+'/pylmm_gn2/lmm.py'
     return path,pylmm_command
-- 
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