http://www.subversion.org.cn/svnbook/1.4/
http://www.subversion.org.cn/svnbook/1.4/svn.developer.usingapi.html#svn.developer.usingapi.otherlangs.ex-2
例 8.3. 一个Python状态爬虫
#!/usr/bin/env python
"""Crawl a working copy directory, printing status information."""
import sys
import os.path
import getopt
import svn.core, svn.client, svn.wc
def generate_status_code(status):
"""Translate a status value into a single-character status code,
using the same logic as the Subversion command-line client."""
code_map = { svn.wc.svn_wc_status_none : ' ',
svn.wc.svn_wc_status_normal : ' ',
svn.wc.svn_wc_status_added : 'A',
svn.wc.svn_wc_status_missing : '!',
svn.wc.svn_wc_status_incomplete : '!',
svn.wc.svn_wc_status_deleted : 'D',
svn.wc.svn_wc_status_replaced : 'R',
svn.wc.svn_wc_status_modified : 'M',
svn.wc.svn_wc_status_merged : 'G',
svn.wc.svn_wc_status_conflicted : 'C',
svn.wc.svn_wc_status_obstructed : '~',
svn.wc.svn_wc_status_ignored : 'I',
svn.wc.svn_wc_status_external : 'X',
svn.wc.svn_wc_status_unversioned : '?',
}
return code_map.get(status, '?')
def do_status(wc_path, verbose):
# Calculate the length of the input working copy path.
wc_path_len = len(wc_path)
# Build a client context baton.
ctx = svn.client.svn_client_ctx_t()
def _status_callback(path, status, root_path_len=wc_path_len):
"""A callback function for svn_client_status."""
# Print the path, minus the bit that overlaps with the root of
# the status crawl
text_status = generate_status_code(status.text_status)
prop_status = generate_status_code(status.prop_status)
print '%s%s %s' % (text_status, prop_status, path[wc_path_len + 1:])
# Do the status crawl, using _status_callback() as our callback function.
svn.client.svn_client_status(wc_path, None, _status_callback,
1, verbose, 0, 0, ctx)
def usage_and_exit(errorcode):
"""Print usage message, and exit with ERRORCODE."""
stream = errorcode and sys.stderr or sys.stdout
stream.write("""Usage: %s OPTIONS WC-PATH
Options:
--help, -h : Show this usage message
--verbose, -v : Show all statuses, even uninteresting ones
""" % (os.path.basename(sys.argv[0])))
sys.exit(errorcode)
if __name__ == '__main__':
# Parse command-line options.
try:
opts, args = getopt.getopt(sys.argv[1:], "hv", ["help", "verbose"])
except getopt.GetoptError:
usage_and_exit(1)
verbose = 0
for opt, arg in opts:
if opt in ("-h", "--help"):
usage_and_exit(0)
if opt in ("-v", "--verbose"):
verbose = 1
if len(args) != 1:
usage_and_exit(2)
# Canonicalize the repository path.
wc_path = svn.core.svn_path_canonicalize(args[0])
# Do the real work.
try:
do_status(wc_path, verbose)
except svn.core.SubversionException, e:
sys.stderr.write("Error (%d): %s\n" % (e[1], e[0]))
sys.exit(1)
就像例 8.2 “使用 Python 处理版本库层”中的例子，这个程序是池自由的，而且最重要的是使用Python的数据类型。svn_client_ctx_t()是欺骗，因为Subversion的API没有这个方法—这仅仅是SWIG自动语言生成中的一点问题（这是对应复杂C结构的一种工厂方法）。也需要注意传递给程序的路径（象最后一个）是通过 svn_path_canonicalize()执行的，因为要防止触发Subversion底层C库的断言，也就是防止导致程序立刻随意退出。