ANN: First working version of "pydent"

[Jürgen Hermann]

pydent is a tool that takes valid python source and indents it canonically
(i.e. using no TABs and 4 spaces per indent level). While doing this, it
tries to keep as much of the original formatting as possible, for example
additional indenting on continued lines. It also removes trailing
whitespace, including any whitespace on empty lines.

I tested it by running it over the standard lib of 2.0 (which surfaced some
funny formatting :), but it could use some heavy testing on as much source
code as possible. Get it from

    http://sourceforge.net/cvs/?group_id=9021

(no tarball yet).

As an example, this is the diff for zipfile.py in the 2.0 standard lib after
running pydent over it (fixed some 2-space indents):

--- zipfile.bak Wed May 30 23:50:43 2001
+++ zipfile.py Thu May 31 00:05:04 2001
@@ -75,12 +75,12 @@
         dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
         dostime = dt[3] << 11 | dt[4] << 5 | dt[5] / 2
         if self.flag_bits & 0x08:
-          # Set these to zero because we write them after the file data
-          CRC = compress_size = file_size = 0
+            # Set these to zero because we write them after the file data
+            CRC = compress_size = file_size = 0
         else:
-          CRC = self.CRC
-          compress_size = self.compress_size
-          file_size = self.file_size
+            CRC = self.CRC
+            compress_size = self.compress_size
+            file_size = self.file_size
         header = struct.pack(structFileHeader, stringFileHeader,
                  self.extract_version, self.reserved, self.flag_bits,
                  self.compress_type, dostime, dosdate, CRC,
@@ -278,14 +278,14 @@
         date_time = mtime[0:6]
         # Create ZipInfo instance to store file information
         if arcname is None:
-          zinfo = ZipInfo(filename, date_time)
+            zinfo = ZipInfo(filename, date_time)
         else:
-          zinfo = ZipInfo(arcname, date_time)
+            zinfo = ZipInfo(arcname, date_time)
         zinfo.external_attr = st[0] << 16   # Unix attributes
         if compress_type is None:
-          zinfo.compress_type = self.compression
+            zinfo.compress_type = self.compression
         else:
-          zinfo.compress_type = compress_type
+            zinfo.compress_type = compress_type
         self._writecheck(zinfo)
         fp = open(filename, "rb")
         zinfo.flag_bits = 0x08
@@ -344,9 +344,9 @@
         zinfo.file_offset = self.fp.tell()  # Start of file bytes
         self.fp.write(bytes)
         if zinfo.flag_bits & 0x08:
-          # Write CRC and file sizes after the file data
-          self.fp.write(struct.pack("<lll", zinfo.CRC, zinfo.compress_size,
-                zinfo.file_size))
+            # Write CRC and file sizes after the file data
+            self.fp.write(struct.pack("<lll", zinfo.CRC,
zinfo.compress_size,
+                  zinfo.file_size))
         self.filelist.append(zinfo)
         self.NameToInfo[zinfo.filename] = zinfo