patchbomb: Defer the import of readline.

If imported at the top of the module, the import appears to succeed,
but raw_input doesn't acquire magic editing fu.  I suspect this has
something to do with the newish demandimport code, because the prior
code worked with demandload.

hgext/patchbomb.py

@@ -1,418 +1,418 b''
 # Command for sending a collection of Mercurial changesets as a series
 # of patch emails.
 #
 # The series is started off with a "[PATCH 0 of N]" introduction,
 # which describes the series as a whole.
 #
 # Each patch email has a Subject line of "[PATCH M of N] ...", using
 # the first line of the changeset description as the subject text.
 # The message contains two or three body parts:
 #
 #   The remainder of the changeset description.
 #
 #   [Optional] If the diffstat program is installed, the result of
 #   running diffstat on the patch.
 #
 #   The patch itself, as generated by "hg export".
 #
 # Each message refers to all of its predecessors using the In-Reply-To
 # and References headers, so they will show up as a sequence in
 # threaded mail and news readers, and in mail archives.
 #
 # For each changeset, you will be prompted with a diffstat summary and
 # the changeset summary, so you can be sure you are sending the right
 # changes.
 #
 # To enable this extension:
 #
 #   [extensions]
 #   hgext.patchbomb =
 #
 # To configure other defaults, add a section like this to your hgrc
 # file:
 #
 #   [email]
 #   from = My Name <my@email>
 #   to = recipient1, recipient2, ...
 #   cc = cc1, cc2, ...
 #   bcc = bcc1, bcc2, ...
 #
 # Then you can use the "hg email" command to mail a series of changesets
 # as a patchbomb.
 #
 # To avoid sending patches prematurely, it is a good idea to first run
 # the "email" command with the "-n" option (test only).  You will be
 # prompted for an email recipient address, a subject an an introductory
 # message describing the patches of your patchbomb.  Then when all is
 # done, your pager will be fired up once for each patchbomb message, so
 # you can verify everything is alright.
 #
 # The "-m" (mbox) option is also very useful.  Instead of previewing
 # each patchbomb message in a pager or sending the messages directly,
 # it will create a UNIX mailbox file with the patch emails.  This
 # mailbox file can be previewed with any mail user agent which supports
 # UNIX mbox files, i.e. with mutt:
 #
 #   % mutt -R -f mbox
 #
 # When you are previewing the patchbomb messages, you can use `formail'
 # (a utility that is commonly installed as part of the procmail package),
 # to send each message out:
 #
 #  % formail -s sendmail -bm -t < mbox
 #
 # That should be all.  Now your patchbomb is on its way out.
 
 import os, errno, socket, tempfile
 import email.MIMEMultipart, email.MIMEText, email.MIMEBase
 import email.Utils, email.Encoders
 from mercurial import cmdutil, commands, hg, mail, ui, patch, util
 from mercurial.i18n import _
 from mercurial.node import *
 
-try:
-    # readline gives raw_input editing capabilities, but is not
-    # present on windows
-    import readline
-except ImportError: pass
-
 def patchbomb(ui, repo, *revs, **opts):
     '''send changesets by email
 
     By default, diffs are sent in the format generated by hg export,
     one per message.  The series starts with a "[PATCH 0 of N]"
     introduction, which describes the series as a whole.
 
     Each patch email has a Subject line of "[PATCH M of N] ...", using
     the first line of the changeset description as the subject text.
     The message contains two or three body parts.  First, the rest of
     the changeset description.  Next, (optionally) if the diffstat
     program is installed, the result of running diffstat on the patch.
     Finally, the patch itself, as generated by "hg export".
 
     With --outgoing, emails will be generated for patches not
     found in the destination repository (or only those which are
     ancestors of the specified revisions if any are provided)
 
     With --bundle, changesets are selected as for --outgoing,
     but a single email containing a binary Mercurial bundle as an
     attachment will be sent.
 
     Examples:
 
     hg email -r 3000          # send patch 3000 only
     hg email -r 3000 -r 3001  # send patches 3000 and 3001
     hg email -r 3000:3005     # send patches 3000 through 3005
     hg email 3000             # send patch 3000 (deprecated)
 
     hg email -o               # send all patches not in default
     hg email -o DEST          # send all patches not in DEST
     hg email -o -r 3000       # send all ancestors of 3000 not in default
     hg email -o -r 3000 DEST  # send all ancestors of 3000 not in DEST
 
     hg email -b               # send bundle of all patches not in default
     hg email -b DEST          # send bundle of all patches not in DEST
     hg email -b -r 3000       # bundle of all ancestors of 3000 not in default
     hg email -b -r 3000 DEST  # bundle of all ancestors of 3000 not in DEST
 
     Before using this command, you will need to enable email in your hgrc.
     See the [email] section in hgrc(5) for details.
     '''
 
     def prompt(prompt, default = None, rest = ': ', empty_ok = False):
+        try:
+            # readline gives raw_input editing capabilities, but is not
+            # present on windows
+            import readline
+        except ImportError: pass
+
         if default: prompt += ' [%s]' % default
         prompt += rest
         while True:
             r = raw_input(prompt)
             if r: return r
             if default is not None: return default
             if empty_ok: return r
             ui.warn(_('Please enter a valid value.\n'))
 
     def confirm(s):
         if not prompt(s, default = 'y', rest = '? ').lower().startswith('y'):
             raise ValueError
 
     def cdiffstat(summary, patchlines):
         s = patch.diffstat(patchlines)
         if s:
             if summary:
                 ui.write(summary, '\n')
                 ui.write(s, '\n')
             confirm(_('Does the diffstat above look okay'))
         return s
 
     def makepatch(patch, idx, total):
         desc = []
         node = None
         body = ''
         for line in patch:
             if line.startswith('#'):
                 if line.startswith('# Node ID'): node = line.split()[-1]
                 continue
             if (line.startswith('diff -r')
                 or line.startswith('diff --git')):
                 break
             desc.append(line)
         if not node: raise ValueError
 
         #body = ('\n'.join(desc[1:]).strip() or
         #        'Patch subject is complete summary.')
         #body += '\n\n\n'
 
         if opts['plain']:
             while patch and patch[0].startswith('# '): patch.pop(0)
             if patch: patch.pop(0)
             while patch and not patch[0].strip(): patch.pop(0)
         if opts['diffstat']:
             body += cdiffstat('\n'.join(desc), patch) + '\n\n'
         if opts['attach']:
             msg = email.MIMEMultipart.MIMEMultipart()
             if body: msg.attach(email.MIMEText.MIMEText(body, 'plain'))
             p = email.MIMEText.MIMEText('\n'.join(patch), 'x-patch')
             binnode = bin(node)
             # if node is mq patch, it will have patch file name as tag
             patchname = [t for t in repo.nodetags(binnode)
                          if t.endswith('.patch') or t.endswith('.diff')]
             if patchname:
                 patchname = patchname[0]
             elif total > 1:
                 patchname = cmdutil.make_filename(repo, '%b-%n.patch',
                                                    binnode, idx, total)
             else:
                 patchname = cmdutil.make_filename(repo, '%b.patch', binnode)
             p['Content-Disposition'] = 'inline; filename=' + patchname
             msg.attach(p)
         else:
             body += '\n'.join(patch)
             msg = email.MIMEText.MIMEText(body)
 
         subj = desc[0].strip().rstrip('. ')
         if total == 1:
             subj = '[PATCH] ' + (opts['subject'] or subj)
         else:
             tlen = len(str(total))
             subj = '[PATCH %0*d of %d] %s' % (tlen, idx, total, subj)
         msg['Subject'] = subj
         msg['X-Mercurial-Node'] = node
         return msg
 
     def outgoing(dest, revs):
         '''Return the revisions present locally but not in dest'''
         dest = ui.expandpath(dest or 'default-push', dest or 'default')
         revs = [repo.lookup(rev) for rev in revs]
         other = hg.repository(ui, dest)
         ui.status(_('comparing with %s\n') % dest)
         o = repo.findoutgoing(other)
         if not o:
             ui.status(_("no changes found\n"))
             return []
         o = repo.changelog.nodesbetween(o, revs or None)[0]
         return [str(repo.changelog.rev(r)) for r in o]
 
     def getbundle(dest):
         tmpdir = tempfile.mkdtemp(prefix='hg-email-bundle-')
         tmpfn = os.path.join(tmpdir, 'bundle')
         try:
             commands.bundle(ui, repo, tmpfn, dest, **opts)
             return open(tmpfn).read()
         finally:
             try:
                 os.unlink(tmpfn)
             except:
                 pass
             os.rmdir(tmpdir)
 
     # option handling
     commands.setremoteconfig(ui, opts)
     if opts.get('outgoint') and opts.get('bundle'):
         raise util.Abort(_("--outgoing mode always on with --bundle; do not re-specify --outgoing"))
 
     if opts.get('outgoing') or opts.get('bundle'):
         if len(revs) > 1:
             raise util.Abort(_("too many destinations"))
         dest = revs and revs[0] or None
         revs = []
 
     if opts.get('rev'):
         if revs:
             raise util.Abort(_('use only one form to specify the revision'))
         revs = opts.get('rev')
 
     if opts.get('outgoing'):
         revs = outgoing(dest, opts.get('rev'))
     if opts.get('bundle'):
         opts['revs'] = revs
 
     # start
     start_time = util.makedate()
 
     def genmsgid(id):
         return '<%s.%s@%s>' % (id[:20], int(start_time[0]), socket.getfqdn())
 
     def getexportmsgs():
         patches = []
 
         class exportee:
             def __init__(self, container):
                 self.lines = []
                 self.container = container
                 self.name = 'email'
 
             def write(self, data):
                 self.lines.append(data)
 
             def close(self):
                 self.container.append(''.join(self.lines).split('\n'))
                 self.lines = []
 
         commands.export(ui, repo, *revs, **{'output': exportee(patches),
                                             'switch_parent': False,
                                             'text': None,
                                             'git': opts.get('git')})
 
         jumbo = []
         msgs = []
 
         ui.write(_('This patch series consists of %d patches.\n\n') % len(patches))
 
         for p, i in zip(patches, xrange(len(patches))):
             jumbo.extend(p)
             msgs.append(makepatch(p, i + 1, len(patches)))
 
         if len(patches) > 1:
             tlen = len(str(len(patches)))
 
             subj = '[PATCH %0*d of %d] %s' % (
                 tlen, 0,
                 len(patches),
                 opts['subject'] or
                 prompt('Subject:', rest = ' [PATCH %0*d of %d] ' % (tlen, 0,
                     len(patches))))
 
             body = ''
             if opts['diffstat']:
                 d = cdiffstat(_('Final summary:\n'), jumbo)
                 if d: body = '\n' + d
 
             ui.write(_('\nWrite the introductory message for the patch series.\n\n'))
             body = ui.edit(body, sender)
 
             msg = email.MIMEText.MIMEText(body)
             msg['Subject'] = subj
 
             msgs.insert(0, msg)
         return msgs
 
     def getbundlemsgs(bundle):
         subj = opts['subject'] or \
                 prompt('Subject:', default='A bundle for your repository')
         ui.write(_('\nWrite the introductory message for the bundle.\n\n'))
         body = ui.edit('', sender)
 
         msg = email.MIMEMultipart.MIMEMultipart()
         if body:
             msg.attach(email.MIMEText.MIMEText(body, 'plain'))
         datapart = email.MIMEBase.MIMEBase('application', 'x-mercurial-bundle')
         datapart.set_payload(bundle)
         datapart.add_header('Content-Disposition', 'attachment',
                             filename='bundle.hg')
         email.Encoders.encode_base64(datapart)
         msg.attach(datapart)
         msg['Subject'] = subj
         return [msg]
 
     if opts.get('bundle'):
         msgs = getbundlemsgs(getbundle(dest))
     else:
         msgs = getexportmsgs()
 
     sender = (opts['from'] or ui.config('email', 'from') or
               ui.config('patchbomb', 'from') or
               prompt('From', ui.username()))
 
     def getaddrs(opt, prpt, default = None):
         addrs = opts[opt] or (ui.config('email', opt) or
                               ui.config('patchbomb', opt) or
                               prompt(prpt, default = default)).split(',')
         return [a.strip() for a in addrs if a.strip()]
 
     to = getaddrs('to', 'To')
     cc = getaddrs('cc', 'Cc', '')
 
     bcc = opts['bcc'] or (ui.config('email', 'bcc') or
                           ui.config('patchbomb', 'bcc') or '').split(',')
     bcc = [a.strip() for a in bcc if a.strip()]
 
     ui.write('\n')
 
     if not opts['test'] and not opts['mbox']:
         mailer = mail.connect(ui)
     parent = None
 
     sender_addr = email.Utils.parseaddr(sender)[1]
     for m in msgs:
         try:
             m['Message-Id'] = genmsgid(m['X-Mercurial-Node'])
         except TypeError:
             m['Message-Id'] = genmsgid('patchbomb')
         if parent:
             m['In-Reply-To'] = parent
         else:
             parent = m['Message-Id']
         m['Date'] = util.datestr(date=start_time,
                 format="%a, %d %b %Y %H:%M:%S", timezone=True)
 
         start_time = (start_time[0] + 1, start_time[1])
         m['From'] = sender
         m['To'] = ', '.join(to)
         if cc: m['Cc']  = ', '.join(cc)
         if bcc: m['Bcc'] = ', '.join(bcc)
         if opts['test']:
             ui.status('Displaying ', m['Subject'], ' ...\n')
             fp = os.popen(os.getenv('PAGER', 'more'), 'w')
             try:
                 fp.write(m.as_string(0))
                 fp.write('\n')
             except IOError, inst:
                 if inst.errno != errno.EPIPE:
                     raise
             fp.close()
         elif opts['mbox']:
             ui.status('Writing ', m['Subject'], ' ...\n')
             fp = open(opts['mbox'], m.has_key('In-Reply-To') and 'ab+' or 'wb+')
             date = util.datestr(date=start_time,
                     format='%a %b %d %H:%M:%S %Y', timezone=False)
             fp.write('From %s %s\n' % (sender_addr, date))
             fp.write(m.as_string(0))
             fp.write('\n\n')
             fp.close()
         else:
             ui.status('Sending ', m['Subject'], ' ...\n')
             # Exim does not remove the Bcc field
             del m['Bcc']
             mailer.sendmail(sender, to + bcc + cc, m.as_string(0))
 
 cmdtable = {
     'email':
     (patchbomb,
      [('a', 'attach', None, 'send patches as inline attachments'),
       ('', 'bcc', [], 'email addresses of blind copy recipients'),
       ('c', 'cc', [], 'email addresses of copy recipients'),
       ('d', 'diffstat', None, 'add diffstat output to messages'),
       ('g', 'git', None, _('use git extended diff format')),
       ('f', 'from', '', 'email address of sender'),
       ('', 'plain', None, 'omit hg patch header'),
       ('n', 'test', None, 'print messages that would be sent'),
       ('m', 'mbox', '', 'write messages to mbox file instead of sending them'),
       ('o', 'outgoing', None, _('send changes not found in the target repository')),
       ('b', 'bundle', None, _('send changes not in target as a binary bundle')),
       ('r', 'rev', [], _('a revision to send')),
       ('s', 'subject', '', 'subject of first message (intro or single patch)'),
       ('t', 'to', [], 'email addresses of recipients'),
       ('', 'force', None, _('run even when remote repository is unrelated (with -b)')),
       ('', 'base', [],
           _('a base changeset to specify instead of a destination (with -b)'))]
       + commands.remoteopts,
      "hg email [OPTION]... [DEST]...")
     }