Initial version

diff --git a/bin/extract_params.py b/bin/extract_params.py
new file mode 100644 (file)
index 0000000..cc988dd
--- /dev/null
+++ b/bin/extract_params.py
@@ -0,0 +1,113 @@
+#==============================================================
+#
+#==============================================================
+def get_help_info() :
+    return "\tUsage : \n\tpython install.py [-gui|tui] [-f <xmlfile>] [-t taget_dir] [-tmp tmp_dir]\n"
+
+#==============================================================
+#
+#==============================================================
+def error_exit (str = ""):
+    import sys
+    if len(str): res = "\n" + str + "\n"
+    else : res = ""
+    print res + \
+          get_help_info() + \
+          "\nWrong parameters\n\n";
+    sys.exit(1);
+
+
+#==============================================================
+# Cheks whether the passed parameter is a key.
+#==============================================================
+def is_key ( val ):
+    import re
+    if val is not None : 
+       return re.match(r'^-[a-zA-Z]', val)
+    return 0
+
+#==============================================================
+#
+#==============================================================
+def extract_parameter ( key, args ) : 
+    import sys
+    length = len(args);
+    if ( length == 0 ) :  return None
+   
+    found = 0;
+
+    for i in range(0, length-1):
+        if  args[i] == key : 
+            if ( is_key ( args[i+1]) ) :
+               print " No value after key ", key
+                sys.exit(1);
+           
+           value = args[i+1]
+            if ( i < length - 2  and is_key ( args[i+2] ) == 0 ) : #control that only one value follows key 
+                                                              #(not a list). In this case params are correct.
+               print "Too much values after key ", key
+                sys.exit(1);
+           
+           found = 1; break;
+    
+    if (found) : 
+       return  value 
+    
+    return None
+
+
+#===============================================================
+# extracts list of values following specified 'key' from 'args[]'
+#===============================================================
+def extract_list (key, args) : 
+
+    lenght = len(args)
+    if ( args is None or lenght == 0 ):
+       error_exit()
+
+    list=[]
+    found = 0
+
+    for i in  range(0, length) :
+        if args[i] == key  : 
+            if (is_key ( args[i+1]))  : 
+                error_exit();
+           
+            for i in range (i+1, lenght):
+                if is_key(args[i]) : break
+                list.append(args[i])
+            found =1; break
+     
+    return list; #empty list is returned if no values after key
+
+
+#==============================================================
+# Method find the $key in the list and return 1 if success
+# and 0 otherwise. 
+#==============================================================
+def find_key (key, argv) :
+
+    if (not is_key(key)) : return 0
+
+    for simbol in  argv :
+        if simbol == key:
+            return 1 
+    return 0
+
+#==============================================================
+#
+#==============================================================
+def parse_parameters (args) :
+
+    if find_key('-h', args) :
+        print get_help_info();
+        import sys
+        sys.exit(0)
+        
+    xmlfile = extract_parameter("-f", args)
+    target_dir =  extract_parameter("-t", args)
+    tmp_dir = extract_parameter("-tmp", args)
+    if find_key('-tui', args):
+        is_gui = 0
+    else : is_gui = 1
+    return [xmlfile, target_dir,  tmp_dir, is_gui]