Mark DragoThis patch improves all of the popen calls in hg-to-git.py by specifying the template 'hg log' should use instead of calling 'hg log' and grepping for the desired data.
Signed-off-by: Mark Drago <markdrago@gmail.com>
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Hello,
I wrote this patch back when the popen calls within hg-to-git came up on the list and I'm just now getting around to sending it in. Junio commented on one of the popen calls by saying the following:
"Isn't this one of the ugliest lines in the whole git.git project, I have to wonder?" -- Junio, http://marc.info/?l=git&m=119673122106601&w=2
So, this patch removes that line and improves the rest of the popen calls as well. It also reduces the overall number of popen calls by combining a bunch of them.
Show changes to contrib/hg-to-git/hg-to-git.py +22 −24
diff --git a/contrib/hg-to-git/hg-to-git.py b/contrib/hg-to-git/hg-to-git.py index 9befb92..c35b158 100755 --- a/contrib/hg-to-git/hg-to-git.py +++ b/contrib/hg-to-git/hg-to-git.py @@ -1,6 +1,6 @@ #! /usr/bin/python -""" hg-to-svn.py - A Mercurial to GIT converter +""" hg-to-git.py - A Mercurial to GIT converter Copyright (C)2007 Stelian Pop <stelian@popies.net> @@ -27,6 +27,8 @@ import re hgvers = {} # List of children for each hg revision hgchildren = {} +# List of parents for each hg revision +hgparents = {} # Current branch for each hg revision hgbranch = {} # Number of new changesets converted from hg @@ -99,17 +101,19 @@ if state: else: print 'State does not exist, first run' -tip = os.popen('hg tip | head -1 | cut -f 2 -d :').read().strip() +tip = os.popen('hg tip --template "{rev}"').read() print 'tip is', tip # Calculate the branches print 'analysing the branches...' hgchildren["0"] = () +hgparents["0"] = (None, None) hgbranch["0"] = "master" for cset in range(1, int(tip) + 1): hgchildren[str(cset)] = () - prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines() - if len(prnts) > 0: + prnts = os.popen('hg log -r %d --template "{parents}"' % cset).read().split(' ') + prnts = map(lambda x: x[:x.find(':')], prnts) + if prnts[0] != '': parent = prnts[0].strip() else: parent = str(cset - 1) @@ -120,6 +124,8 @@ for cset in range(1, int(tip) + 1): else: mparent = None + hgparents[str(cset)] = (parent, mparent) + if mparent: # For merge changesets, take either one, preferably the 'master' branch if hgbranch[mparent] == 'master': @@ -147,34 +153,27 @@ for cset in range(int(tip) + 1): hgnewcsets += 1 # get info - prnts = os.popen('hg log -r %d | grep ^parent: | cut -f 2 -d :' % cset).readlines() - if len(prnts) > 0: - parent = prnts[0].strip() - else: - parent = str(cset - 1) - if len(prnts) > 1: - mparent = prnts[1].strip() - else: - mparent = None - + log_data = os.popen('hg log -r %d --template "{tags}\n{date|date}\n{author}\n"' % cset).readlines() + tag = log_data[0].strip() + date = log_data[1].strip() + user = log_data[2].strip() + parent = hgparents[str(cset)][0] + mparent = hgparents[str(cset)][1] + + #get comment (fdcomment, filecomment) = tempfile.mkstemp() - csetcomment = os.popen('hg log -r %d -v | grep -v ^changeset: | grep -v ^parent: | grep -v ^user: | grep -v ^date | grep -v ^files: | grep -v ^description: | grep -v ^tag:' % cset).read().strip() + csetcomment = os.popen('hg log -r %d --template "{desc}"' % cset).read().strip() os.write(fdcomment, csetcomment) os.close(fdcomment) - date = os.popen('hg log -r %d | grep ^date: | cut -f 2- -d :' % cset).read().strip() - - tag = os.popen('hg log -r %d | grep ^tag: | cut -f 2- -d :' % cset).read().strip() - - user = os.popen('hg log -r %d | grep ^user: | cut -f 2- -d :' % cset).read().strip() - print '-----------------------------------------' print 'cset:', cset print 'branch:', hgbranch[str(cset)] print 'user:', user print 'date:', date print 'comment:', csetcomment - print 'parent:', parent + if parent: + print 'parent:', parent if mparent: print 'mparent:', mparent if tag: @@ -224,8 +223,7 @@ for cset in range(int(tip) + 1): os.system('git-branch -d %s' % otherbranch) # retrieve and record the version - vvv = os.popen('git-show | head -1').read() - vvv = vvv[vvv.index(' ') + 1 : ].strip() + vvv = os.popen('git-show --quiet --pretty=format:%H').read() print 'record', cset, '->', vvv hgvers[str(cset)] = vvv
