don't generate empty output files

git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@3332 e7d03fd6-7b0d-0410-9947-9c21f3af8025

ChangeLog

@@ -4,6 +4,11 @@
     new option --allow-root to prevent this.
     Type: feature
     Changed: linkchecker, doc/{en,de}/linkchecker.1
+  
+  * Don't generate empty output files, open them only when they are
+    written to.
+    Type: bugfix
+    Changed: linkcheck/logger/{__init__,text}.py
 
 4.1 "Totsi" (released 29.5.2006)
 

linkcheck/logger/__init__.py

@@ -77,19 +77,23 @@ class Logger (object):
         """
         Initialize self.fd file descriptor from args.
         """
+        self.filename = None
+        self.close_fd = False
+        self.fd = None
         if args.get('fileoutput'):
-            filename = args['filename']
-            path = os.path.dirname(filename)
-            if path and not os.path.isdir(path):
-                os.makedirs(path)
-            self.fd = file(filename, "wb")
-            self.close_fd = True
+            self.filename = args['filename']
         elif args.has_key('fd'):
             self.fd = args['fd']
-            self.close_fd = False
         else:
             self.fd = sys.stdout
-            self.close_fd = False
+
+    def start_fileoutput (self):
+        path = os.path.dirname(self.filename)
+        if path and not os.path.isdir(path):
+            os.makedirs(path)
+        self.fd = file(self.filename, "wb")
+        self.close_fd = True
+        self.filename = None
 
     def close_fileoutput (self):
         """
@@ -144,6 +148,8 @@ class Logger (object):
         """
         Write string to output descriptor.
         """
+        if self.filename is not None:
+            self.start_fileoutput()
         if self.fd is None:
             raise ValueError("write to non-file")
         self.fd.write(self.encode(s), **args)

linkcheck/logger/text.py

@@ -70,7 +70,8 @@ class TextLogger (linkcheck.logger.Logger):
         """
         super(TextLogger, self).__init__(**args)
         self.init_fileoutput(args)
-        self.fd = linkcheck.ansicolor.Colorizer(self.fd)
+        if self.fd is not None:
+            self.fd = linkcheck.ansicolor.Colorizer(self.fd)
         self.colorparent = args['colorparent']
         self.colorurl = args['colorurl']
         self.colorname = args['colorname']
@@ -84,6 +85,10 @@ class TextLogger (linkcheck.logger.Logger):
         self.colordlsize = args['colordlsize']
         self.colorreset = args['colorreset']
 
+    def start_fileoutput (self):
+        super(TextLogger, self).start_fileoutput()
+        self.fd = linkcheck.ansicolor.Colorizer(self.fd)
+
     def start_output (self):
         """
         Write generic start checking info.