Mercurial > hg
view contrib/darcs2hg.py @ 6151:8bc4fe428103
Merge with crew
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Wed, 20 Feb 2008 13:38:16 -0800 |
parents | 6b6104430964 |
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#!/usr/bin/env python # Encoding: iso-8859-1 # vim: tw=80 ts=4 sw=4 noet # ----------------------------------------------------------------------------- # Project : Basic Darcs to Mercurial conversion script # # *** DEPRECATED. Use the convert extension instead. This script will # *** be removed soon. # # ----------------------------------------------------------------------------- # Authors : Sebastien Pierre <sebastien@xprima.com> # TK Soh <teekaysoh@gmail.com> # ----------------------------------------------------------------------------- # Creation : 24-May-2006 # ----------------------------------------------------------------------------- import os, sys import tempfile import xml.dom.minidom as xml_dom from time import strptime, mktime import re DARCS_REPO = None HG_REPO = None USAGE = """\ %s DARCSREPO HGREPO [SKIP] Converts the given Darcs repository to a new Mercurial repository. The given HGREPO must not exist, as it will be created and filled up (this will avoid overwriting valuable data. In case an error occurs within the process, you can resume the process by giving the last successfuly applied change number. """ % (os.path.basename(sys.argv[0])) # ------------------------------------------------------------------------------ # # Utilities # # ------------------------------------------------------------------------------ def cmd(text, path=None, silent=False): """Executes a command, in the given directory (if any), and returns the command result as a string.""" cwd = None if path: path = os.path.abspath(path) cwd = os.getcwd() os.chdir(path) if not silent: print "> ", text res = os.popen(text).read() if path: os.chdir(cwd) return res def writefile(path, data): """Writes the given data into the given file.""" f = file(path, "w") ; f.write(data) ; f.close() def error( *args ): sys.stderr.write("ERROR: ") for a in args: sys.stderr.write(str(a)) sys.stderr.write("\n") sys.stderr.write("You can make manual fixes if necessary and then resume by" " giving the last changeset number") sys.exit(-1) # ------------------------------------------------------------------------------ # # Darcs interface # # ------------------------------------------------------------------------------ def darcs_changes(darcsRepo): """Gets the changes list from the given darcs repository. This returns the chronological list of changes as (change name, change summary).""" changes = cmd("darcs changes --reverse --xml-output", darcsRepo) doc = xml_dom.parseString(changes) for patch_node in doc.childNodes[0].childNodes: name = filter(lambda n: n.nodeName == "name", patch_node.childNodes) comm = filter(lambda n: n.nodeName == "comment", patch_node.childNodes) if not name:continue else: name = name[0].childNodes[0].data if not comm: comm = "" else: comm = comm[0].childNodes[0].data author = patch_node.getAttribute("author") date = patch_node.getAttribute("date") chash = os.path.splitext(patch_node.getAttribute("hash"))[0] yield author, date, name, chash, comm def darcs_tip(darcs_repo): changes = cmd("darcs changes",darcs_repo,silent=True) changes = filter(lambda l: l.strip().startswith("* "), changes.split("\n")) return len(changes) def darcs_pull(hg_repo, darcs_repo, chash): old_tip = darcs_tip(darcs_repo) res = cmd("darcs pull \"%s\" --all --match=\"hash %s\"" % (darcs_repo, chash), hg_repo) if re.search('^We have conflicts in the following files:$', res, re.MULTILINE): print "Trying to revert files to work around conflict..." rev_res = cmd ("darcs revert --all", hg_repo) print rev_res print res new_tip = darcs_tip(darcs_repo) if not new_tip != old_tip + 1: error("Darcs pull did not work as expected: " + res) def darcs_changes_summary(darcs_repo, chash): """Gets the changes from the darcs summary. This returns the chronological list of changes as (change_type, args). Eg. ('add_file', 'foo.txt') or ('move', ['foo.txt','bar.txt']).""" change = cmd("darcs changes --summary --xml-output --match=\"hash %s\"" % (chash), darcs_repo) doc = xml_dom.parseString(change) for patch_node in doc.childNodes[0].childNodes: summary_nodes = filter(lambda n: n.nodeName == "summary" and n.nodeType == n.ELEMENT_NODE, patch_node.childNodes) for summary_node in summary_nodes: change_nodes = filter(lambda n: n.nodeType == n.ELEMENT_NODE, summary_node.childNodes) if len(change_nodes) == 0: name = filter(lambda n: n.nodeName == "name", patch_node.childNodes) if not name: error("Darcs patch has an empty summary node and no name: " + patch_node.toxml()) name = name[0].childNodes[0].data.strip() (tag, sub_count) = re.subn('^TAG ', '', name, 1) if sub_count != 1: error("Darcs patch has an empty summary node but doesn't look like a tag: " + patch_node.toxml()); for change_node in change_nodes: change = change_node.nodeName if change == 'modify_file': yield change, change_node.childNodes[0].data.strip() elif change == 'add_file': yield change, change_node.childNodes[0].data.strip() elif change == 'remove_file': yield change, change_node.childNodes[0].data.strip() elif change == 'add_directory': yield change, change_node.childNodes[0].data.strip() elif change == 'remove_directory': yield change, change_node.childNodes[0].data.strip() elif change == 'move': yield change, (change_node.getAttribute('from'), change_node.getAttribute('to')) else: error('Problem parsing summary xml: Unexpected element: ' + change_node.toxml()) # ------------------------------------------------------------------------------ # # Mercurial interface # # ------------------------------------------------------------------------------ def hg_commit( hg_repo, text, author, date ): fd, tmpfile = tempfile.mkstemp(prefix="darcs2hg_") writefile(tmpfile, text) old_tip = hg_tip(hg_repo) cmd("hg add -X _darcs", hg_repo) cmd("hg remove -X _darcs --after", hg_repo) res = cmd("hg commit -l %s -u \"%s\" -d \"%s 0\"" % (tmpfile, author, date), hg_repo) os.close(fd) os.unlink(tmpfile) new_tip = hg_tip(hg_repo) if not new_tip == old_tip + 1: # Sometimes we may have empty commits, we simply skip them if res.strip().lower().find("nothing changed") != -1: pass else: error("Mercurial commit did not work as expected: " + res) def hg_tip( hg_repo ): """Returns the latest local revision number in the given repository.""" tip = cmd("hg tip", hg_repo, silent=True) tip = tip.split("\n")[0].split(":")[1].strip() return int(tip) def hg_rename( hg_repo, from_file, to_file ): cmd("hg rename --after \"%s\" \"%s\"" % (from_file, to_file), hg_repo); def hg_tag ( hg_repo, text, author, date ): old_tip = hg_tip(hg_repo) res = cmd("hg tag -u \"%s\" -d \"%s 0\" \"%s\"" % (author, date, text), hg_repo) new_tip = hg_tip(hg_repo) if not new_tip == old_tip + 1: error("Mercurial tag did not work as expected: " + res) def hg_handle_change( hg_repo, author, date, change, arg ): """Processes a change event as output by darcs_changes_summary. These consist of file move/rename/add/delete commands.""" if change == 'modify_file': pass elif change == 'add_file': pass elif change =='remove_file': pass elif change == 'add_directory': pass elif change == 'remove_directory': pass elif change == 'move': hg_rename(hg_repo, arg[0], arg[1]) elif change == 'tag': hg_tag(hg_repo, arg, author, date) else: error('Unknown change type ' + change + ': ' + arg) # ------------------------------------------------------------------------------ # # Main # # ------------------------------------------------------------------------------ if __name__ == "__main__": args = sys.argv[1:] # We parse the arguments if len(args) == 2: darcs_repo = os.path.abspath(args[0]) hg_repo = os.path.abspath(args[1]) skip = None elif len(args) == 3: darcs_repo = os.path.abspath(args[0]) hg_repo = os.path.abspath(args[1]) skip = int(args[2]) else: print USAGE sys.exit(-1) print 'This command is deprecated. Use the convert extension instead.' # Initializes the target repo if not os.path.isdir(darcs_repo + "/_darcs"): print "No darcs directory found at: " + darcs_repo sys.exit(-1) if not os.path.isdir(hg_repo): os.mkdir(hg_repo) elif skip == None: print "Given HG repository must not exist when no SKIP is specified." sys.exit(-1) if skip == None: cmd("hg init \"%s\"" % (hg_repo)) cmd("darcs initialize", hg_repo) # Get the changes from the Darcs repository change_number = 0 for author, date, summary, chash, description in darcs_changes(darcs_repo): print "== changeset", change_number, if skip != None and change_number <= skip: print "(skipping)" else: text = summary + "\n" + description # The commit hash has a date like 20021020201112 # --------------------------------YYYYMMDDHHMMSS date = chash.split("-")[0] epoch = int(mktime(strptime(date, '%Y%m%d%H%M%S'))) darcs_pull(hg_repo, darcs_repo, chash) for change, arg in darcs_changes_summary(darcs_repo, chash): hg_handle_change(hg_repo, author, epoch, change, arg) hg_commit(hg_repo, text, author, epoch) change_number += 1 print "Darcs repository (_darcs) was not deleted. You can keep or remove it." # EOF