Its been a while since I wrote any new hook scripts so I thought I would refresh my knowledge before talking about them at phpconference.co.uk. I also love playing around with python – it’s straight forward, pretty and gives good ‘sad puppy’ feedback when you’ve missed a closing bracket.
So I came up with this beast to turn svn log output into a dictionary. You can then do what you like with it: output to a file, turn into html, stream to a feed, whatever.
from subprocess import check_output
repo_cmd = "svn log file:///svnrepro/tests/deleteFile/trunk"
output = check_output(repo_cmd, shell=True)
demarker = "--------------------------------------------------------\n"
contents = output.split(demarker)
ignore_these = ["[hotfix]", "[merge]"]
log_book = list()
for section in contents:
lines = section.split("\n\n")
if len(lines) < 2 : continue
commit_info = lines[0]
message = lines[1].strip()
ignore = False
for prefix in ignore_these:
if message.startswith(prefix):
ignore = True
break
if ignore == True: continue
info = commit_info.split("|")
section = dict()
section["revision"] = info[0].strip().replace("r", "")
section["user"] = info[1].strip()
section["date"] = info[2].strip()
length = info[3].strip().split(" ")
section["messageLength"] = length[0]
section["message"] = message
log_book.append(section)
print log_book
What can I say, I like understanding things at a first principles level.
Of course then I remembered a cool flag which turns a predetermined text output into something much more meaningful.
repo_cmd = "svn log --xml file:///svnrepro/tests/deleteFile/trunk"xml.etree.ElementTree is the built in python way of handling xml and, again, it’s a bit hand cranked and leads to many unnecessary lines of code. So why re-invent the wheel?
“Has someone already done this?” is rapidly becoming my first question, and yes, someone has!
https://github.com/martinblech/xmltodict
This is the second module library I tried, and is one that can actually deal with lists of elements – essential for svn log output. If you are used to handling things in JSON, it’s really easy:
from subprocess import check_output
import json
import xmltodict
# https://github.com/martinblech/xmltodict
repo_cmd = "svn log --xml file:///svnrepro/tests/deleteFile/trunk"
output = check_output(repo_cmd, shell=True)
print json.dumps(xmltodict.parse(output))
I have to admit, a little piece of me feels like I’m no longer writing ‘real’ code and that there’s nothing left unsolved or uncoded. The rest of me is doing a happy dance – now we are freed up to use technology to solve the real issues – save time, collaborate well and communicate effectively to make lives better!