Use "svn cat" in tools/submit_try

tools/svn.py

 '''
 Copyright 2011 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 '''
 
 import fnmatch
 import os
 import re
 import subprocess
 
 PROPERTY_MIMETYPE = 'svn:mime-type'
 
 # Status types for GetFilesWithStatus()
 STATUS_ADDED                 = 0x01
 STATUS_DELETED               = 0x02
 STATUS_MODIFIED              = 0x04
 STATUS_NOT_UNDER_SVN_CONTROL = 0x08
 
+
+if os.name == 'nt':
+  SVN = 'svn.bat'
+else:
+  SVN = 'svn'
+
+
+def Cat(svn_url):
+    """Returns the contents of the file at the given svn_url. 
+
+    @param svn_url URL of the file to read
+    """
+    proc = subprocess.Popen([SVN, 'cat', svn_url],
+                            stdout=subprocess.PIPE,
+                            stderr=subprocess.STDOUT)
+    exitcode = proc.wait()
+    if not exitcode == 0:
+        raise Exception('Could not retrieve %s. Verify that the URL is valid '
+                        'and check your connection.' % svn_url)
+    return proc.communicate()[0]
+
+
 class Svn:
 
     def __init__(self, directory):
         """Set up to manipulate SVN control within the given directory.
 
         @param directory
         """
         self._directory = directory
 
     def _RunCommand(self, args):
         """Run a command (from self._directory) and return stdout as a single
         string.
 
         @param args a list of arguments
         """
         print 'RunCommand: %s' % args
         proc = subprocess.Popen(args, cwd=self._directory,
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         (stdout, stderr) = proc.communicate()
         if proc.returncode is not 0:
             raise Exception('command "%s" failed in dir "%s": %s' %
                             (args, self._directory, stderr))
         return stdout
 
+    def GetInfo(self):
+        """Run "svn info" and return a dictionary containing its output.

[epoger, 2013/03/14 18:26:46]

nice!

+        """
+        output = self._RunCommand([SVN, 'info'])
+        svn_info = {}
+        for line in output.split('\n'):
+          if ':' in line:
+            (key, value) = line.split(':', 1)
+            svn_info[key.strip()] = value.strip()
+        return svn_info
+
     def Checkout(self, url, path):
         """Check out a working copy from a repository.
         Returns stdout as a single string.
 
         @param url URL from which to check out the working copy
         @param path path (within self._directory) where the local copy will be
         written
         """
-        return self._RunCommand(['svn', 'checkout', url, path])
+        return self._RunCommand([SVN, 'checkout', url, path])
 
     def ListSubdirs(self, url):
         """Returns a list of all subdirectories (not files) within a given SVN
         url.
 
         @param url remote directory to list subdirectories of
         """
         subdirs = []
-        filenames = self._RunCommand(['svn', 'ls', url]).split('\n')
+        filenames = self._RunCommand([SVN, 'ls', url]).split('\n')
         for filename in filenames:
             if filename.endswith('/'):
                 subdirs.append(filename.strip('/'))
         return subdirs
 
     def GetNewFiles(self):
         """Return a list of files which are in this directory but NOT under
         SVN control.
         """
         return self.GetFilesWithStatus(STATUS_NOT_UNDER_SVN_CONTROL)
@@ skipping 13 matching lines @@
         status_types_string = ''
         if status & STATUS_ADDED:
             status_types_string += 'A'
         if status & STATUS_DELETED:
             status_types_string += 'D'
         if status & STATUS_MODIFIED:
             status_types_string += 'M'
         if status & STATUS_NOT_UNDER_SVN_CONTROL:
             status_types_string += '\?'
         status_regex_string = '^[%s].....\s+(.+)$' % status_types_string
-        stdout = self._RunCommand(['svn', 'status'])
+        stdout = self._RunCommand([SVN, 'status'])
         status_regex = re.compile(status_regex_string, re.MULTILINE)
         files = status_regex.findall(stdout)
         return files
 
     def AddFiles(self, filenames):
         """Adds these files to SVN control.
 
         @param filenames files to add to SVN control
         """
-        self._RunCommand(['svn', 'add'] + filenames)
+        self._RunCommand([SVN, 'add'] + filenames)
 
     def SetProperty(self, filenames, property_name, property_value):
         """Sets a svn property for these files.
 
         @param filenames files to set property on
         @param property_name property_name to set for each file
         @param property_value what to set the property_name to
         """
         if filenames:
             self._RunCommand(
-                ['svn', 'propset', property_name, property_value] + filenames)
+                [SVN, 'propset', property_name, property_value] + filenames)
 
     def SetPropertyByFilenamePattern(self, filename_pattern,
                                      property_name, property_value):
         """Sets a svn property for all files matching filename_pattern.
 
         @param filename_pattern set the property for all files whose names match
                this Unix-style filename pattern (e.g., '*.jpg')
         @param property_name property_name to set for each file
         @param property_value what to set the property_name to
         """
         all_files = os.listdir(self._directory)
         matching_files = sorted(fnmatch.filter(all_files, filename_pattern))
         self.SetProperty(matching_files, property_name, property_value)
 
     def ExportBaseVersionOfFile(self, file_within_repo, dest_path):
         """Retrieves a copy of the base version (what you would get if you ran
         'svn revert') of a file within the repository.
 
         @param file_within_repo path to the file within the repo whose base
                version you wish to obtain
         @param dest_path destination to which to write the base content
         """
-        self._RunCommand(['svn', 'export', '--revision', 'BASE',
+        self._RunCommand([SVN, 'export', '--revision', 'BASE',
                           file_within_repo, dest_path])