author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
Sat, 07 Apr 2007 04:27:55 -0300 | |
changeset 4315 | bc6f5a1d8b7b |
parent 3673 | eb0b4a2d70a9 |
child 5339 | b62a59fa9d26 |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# Encoding: iso-8859-1 |
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# vim: tw=80 ts=4 sw=4 noet |
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# ----------------------------------------------------------------------------- |
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# Project : Basic Darcs to Mercurial conversion script |
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# ----------------------------------------------------------------------------- |
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# Authors : Sebastien Pierre <sebastien@xprima.com> |
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# TK Soh <teekaysoh@gmail.com> |
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# ----------------------------------------------------------------------------- |
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# Creation : 24-May-2006 |
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# Last mod : 05-Jun-2006 |
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# ----------------------------------------------------------------------------- |
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|
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import os, sys |
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import tempfile |
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import xml.dom.minidom as xml_dom |
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from time import strptime, mktime |
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DARCS_REPO = None |
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HG_REPO = None |
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USAGE = """\ |
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%s DARCSREPO HGREPO [SKIP] |
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Converts the given Darcs repository to a new Mercurial repository. The given |
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HGREPO must not exist, as it will be created and filled up (this will avoid |
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overwriting valuable data. |
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|
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In case an error occurs within the process, you can resume the process by |
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giving the last successfuly applied change number. |
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""" % (os.path.basename(sys.argv[0])) |
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# ------------------------------------------------------------------------------ |
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# |
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# Utilities |
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# |
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# ------------------------------------------------------------------------------ |
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def cmd(text, path=None, silent=False): |
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"""Executes a command, in the given directory (if any), and returns the |
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command result as a string.""" |
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cwd = None |
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if path: |
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path = os.path.abspath(path) |
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cwd = os.getcwd() |
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os.chdir(path) |
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if not silent: print "> ", text |
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res = os.popen(text).read() |
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if path: |
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os.chdir(cwd) |
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return res |
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def writefile(path, data): |
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"""Writes the given data into the given file.""" |
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f = file(path, "w") ; f.write(data) ; f.close() |
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def error( *args ): |
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sys.stderr.write("ERROR: ") |
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for a in args: sys.stderr.write(str(a)) |
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sys.stderr.write("\n") |
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sys.stderr.write("You can make manual fixes if necessary and then resume by" |
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" giving the last changeset number") |
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sys.exit(-1) |
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# ------------------------------------------------------------------------------ |
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# |
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# Darcs interface |
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# |
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# ------------------------------------------------------------------------------ |
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def darcs_changes(darcsRepo): |
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"""Gets the changes list from the given darcs repository. This returns the |
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chronological list of changes as (change name, change summary).""" |
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changes = cmd("darcs changes --reverse --xml-output", darcsRepo) |
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doc = xml_dom.parseString(changes) |
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for patch_node in doc.childNodes[0].childNodes: |
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name = filter(lambda n: n.nodeName == "name", patch_node.childNodes) |
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comm = filter(lambda n: n.nodeName == "comment", patch_node.childNodes) |
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if not name:continue |
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else: name = name[0].childNodes[0].data |
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if not comm: comm = "" |
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else: comm = comm[0].childNodes[0].data |
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author = patch_node.getAttribute("author") |
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date = patch_node.getAttribute("date") |
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chash = os.path.splitext(patch_node.getAttribute("hash"))[0] |
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yield author, date, name, chash, comm |
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def darcs_tip(darcs_repo): |
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changes = cmd("darcs changes",darcs_repo,silent=True) |
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changes = filter(lambda l: l.strip().startswith("* "), changes.split("\n")) |
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return len(changes) |
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def darcs_pull(hg_repo, darcs_repo, chash): |
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old_tip = darcs_tip(darcs_repo) |
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res = cmd("darcs pull \"%s\" --all --match=\"hash %s\"" % (darcs_repo, chash), hg_repo) |
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print res |
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new_tip = darcs_tip(darcs_repo) |
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if not new_tip != old_tip + 1: |
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error("Darcs pull did not work as expected: " + res) |
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# ------------------------------------------------------------------------------ |
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# |
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# Mercurial interface |
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# |
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darcs2hg.py: import darcs project into mercurial
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# ------------------------------------------------------------------------------ |
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def hg_commit( hg_repo, text, author, date ): |
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fd, tmpfile = tempfile.mkstemp(prefix="darcs2hg_") |
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writefile(tmpfile, text) |
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old_tip = hg_tip(hg_repo) |
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cmd("hg add -X _darcs", hg_repo) |
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cmd("hg remove -X _darcs --after", hg_repo) |
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res = cmd("hg commit -l %s -u \"%s\" -d \"%s 0\"" % (tmpfile, author, date), hg_repo) |
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os.close(fd) |
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os.unlink(tmpfile) |
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new_tip = hg_tip(hg_repo) |
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if not new_tip == old_tip + 1: |
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# Sometimes we may have empty commits, we simply skip them |
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if res.strip().lower().find("nothing changed") != -1: |
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pass |
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else: |
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error("Mercurial commit did not work as expected: " + res) |
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|
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def hg_tip( hg_repo ): |
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"""Returns the latest local revision number in the given repository.""" |
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tip = cmd("hg tip", hg_repo, silent=True) |
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tip = tip.split("\n")[0].split(":")[1].strip() |
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return int(tip) |
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# ------------------------------------------------------------------------------ |
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# |
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# Main |
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# |
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# ------------------------------------------------------------------------------ |
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|
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if __name__ == "__main__": |
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args = sys.argv[1:] |
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# We parse the arguments |
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if len(args) == 2: |
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darcs_repo = os.path.abspath(args[0]) |
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hg_repo = os.path.abspath(args[1]) |
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skip = None |
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elif len(args) == 3: |
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darcs_repo = os.path.abspath(args[0]) |
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hg_repo = os.path.abspath(args[1]) |
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skip = int(args[2]) |
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else: |
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print USAGE |
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sys.exit(-1) |
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# Initializes the target repo |
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if not os.path.isdir(darcs_repo + "/_darcs"): |
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print "No darcs directory found at: " + darcs_repo |
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sys.exit(-1) |
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if not os.path.isdir(hg_repo): |
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os.mkdir(hg_repo) |
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elif skip == None: |
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print "Given HG repository must not exist when no SKIP is specified." |
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sys.exit(-1) |
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if skip == None: |
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cmd("hg init \"%s\"" % (hg_repo)) |
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cmd("darcs initialize", hg_repo) |
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# Get the changes from the Darcs repository |
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change_number = 0 |
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for author, date, summary, chash, description in darcs_changes(darcs_repo): |
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print "== changeset", change_number, |
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166 |
if skip != None and change_number <= skip: |
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167 |
print "(skipping)" |
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168 |
else: |
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text = summary + "\n" + description |
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170 |
darcs_pull(hg_repo, darcs_repo, chash) |
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171 |
# The commit hash has a date like 20021020201112 |
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172 |
# --------------------------------YYYYMMDDHHMMSS |
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173 |
date = chash.split("-")[0] |
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epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S'))) |
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175 |
hg_commit(hg_repo, text, author, epoch) |
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176 |
change_number += 1 |
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177 |
print "Darcs repository (_darcs) was not deleted. You can keep or remove it." |
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178 |
|
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179 |
# EOF |