view hgext/largefiles/uisetup.py @ 16439:290850e7aa43

largefiles: fix cat for largefiles (issue3352)

This is a fix to largefiles so that 'hg cat' will work correctly when a
largefile is specified.

As per discussion on Issue 3352:

1) The file will be printed regardless if it is binary or large.
2) The file is downloaded if it is not readily available (not found in
   the system cache), so that it can be printed.  If the download fails,
   then we abort.

# Copyright 2009-2010 Gregory P. Ward
# Copyright 2009-2010 Intelerad Medical Systems Incorporated
# Copyright 2010-2011 Fog Creek Software
# Copyright 2010-2011 Unity Technologies
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''setup for largefiles extension: uisetup'''

from mercurial import archival, cmdutil, commands, extensions, filemerge, hg, \
    httprepo, localrepo, merge, sshrepo, sshserver, wireproto
from mercurial.i18n import _
from mercurial.hgweb import hgweb_mod, protocol

import overrides
import proto

def uisetup(ui):
    # Disable auto-status for some commands which assume that all
    # files in the result are under Mercurial's control

    entry = extensions.wrapcommand(commands.table, 'add',
                                   overrides.overrideadd)
    addopt = [('', 'large', None, _('add as largefile')),
              ('', 'normal', None, _('add as normal file')),
              ('', 'lfsize', '', _('add all files above this size '
                                   '(in megabytes) as largefiles '
                                   '(default: 10)'))]
    entry[1].extend(addopt)

    entry = extensions.wrapcommand(commands.table, 'addremove',
            overrides.overrideaddremove)
    entry = extensions.wrapcommand(commands.table, 'remove',
                                   overrides.overrideremove)
    entry = extensions.wrapcommand(commands.table, 'forget',
                                   overrides.overrideforget)
    entry = extensions.wrapcommand(commands.table, 'status',
                                   overrides.overridestatus)
    entry = extensions.wrapcommand(commands.table, 'log',
                                   overrides.overridelog)
    entry = extensions.wrapcommand(commands.table, 'rollback',
                                   overrides.overriderollback)
    entry = extensions.wrapcommand(commands.table, 'verify',
                                   overrides.overrideverify)

    verifyopt = [('', 'large', None, _('verify largefiles')),
                 ('', 'lfa', None,
                     _('verify all revisions of largefiles not just current')),
                 ('', 'lfc', None,
                     _('verify largefile contents not just existence'))]
    entry[1].extend(verifyopt)

    entry = extensions.wrapcommand(commands.table, 'outgoing',
        overrides.overrideoutgoing)
    outgoingopt = [('', 'large', None, _('display outgoing largefiles'))]
    entry[1].extend(outgoingopt)
    entry = extensions.wrapcommand(commands.table, 'summary',
                                   overrides.overridesummary)
    summaryopt = [('', 'large', None, _('display outgoing largefiles'))]
    entry[1].extend(summaryopt)

    entry = extensions.wrapcommand(commands.table, 'update',
                                   overrides.overrideupdate)
    entry = extensions.wrapcommand(commands.table, 'pull',
                                   overrides.overridepull)
    entry = extensions.wrapcommand(commands.table, 'cat',
                                   overrides.overridecat)
    entry = extensions.wrapfunction(merge, '_checkunknownfile',
                                    overrides.overridecheckunknownfile)
    entry = extensions.wrapfunction(merge, 'manifestmerge',
                                    overrides.overridemanifestmerge)
    entry = extensions.wrapfunction(filemerge, 'filemerge',
                                    overrides.overridefilemerge)
    entry = extensions.wrapfunction(cmdutil, 'copy',
                                    overrides.overridecopy)

    # Backout calls revert so we need to override both the command and the
    # function
    entry = extensions.wrapcommand(commands.table, 'revert',
                                   overrides.overriderevert)
    entry = extensions.wrapfunction(commands, 'revert',
                                    overrides.overriderevert)

    # clone uses hg._update instead of hg.update even though they are the
    # same function... so wrap both of them)
    extensions.wrapfunction(hg, 'update', overrides.hgupdate)
    extensions.wrapfunction(hg, '_update', overrides.hgupdate)
    extensions.wrapfunction(hg, 'clean', overrides.hgclean)
    extensions.wrapfunction(hg, 'merge', overrides.hgmerge)

    extensions.wrapfunction(archival, 'archive', overrides.overridearchive)
    extensions.wrapfunction(cmdutil, 'bailifchanged',
                            overrides.overridebailifchanged)

    # create the new wireproto commands ...
    wireproto.commands['putlfile'] = (proto.putlfile, 'sha')
    wireproto.commands['getlfile'] = (proto.getlfile, 'sha')
    wireproto.commands['statlfile'] = (proto.statlfile, 'sha')

    # ... and wrap some existing ones
    wireproto.commands['capabilities'] = (proto.capabilities, '')
    wireproto.commands['heads'] = (proto.heads, '')
    wireproto.commands['lheads'] = (wireproto.heads, '')

    # make putlfile behave the same as push and {get,stat}lfile behave
    # the same as pull w.r.t. permissions checks
    hgweb_mod.perms['putlfile'] = 'push'
    hgweb_mod.perms['getlfile'] = 'pull'
    hgweb_mod.perms['statlfile'] = 'pull'

    # the hello wireproto command uses wireproto.capabilities, so it won't see
    # our largefiles capability unless we replace the actual function as well.
    proto.capabilitiesorig = wireproto.capabilities
    wireproto.capabilities = proto.capabilities

    # these let us reject non-largefiles clients and make them display
    # our error messages
    protocol.webproto.refuseclient = proto.webprotorefuseclient
    sshserver.sshserver.refuseclient = proto.sshprotorefuseclient

    # can't do this in reposetup because it needs to have happened before
    # wirerepo.__init__ is called
    proto.ssholdcallstream = sshrepo.sshrepository._callstream
    proto.httpoldcallstream = httprepo.httprepository._callstream
    sshrepo.sshrepository._callstream = proto.sshrepocallstream
    httprepo.httprepository._callstream = proto.httprepocallstream

    # don't die on seeing a repo with the largefiles requirement
    localrepo.localrepository.supported |= set(['largefiles'])

    # override some extensions' stuff as well
    for name, module in extensions.extensions():
        if name == 'fetch':
            extensions.wrapcommand(getattr(module, 'cmdtable'), 'fetch',
                overrides.overridefetch)
        if name == 'purge':
            extensions.wrapcommand(getattr(module, 'cmdtable'), 'purge',
                overrides.overridepurge)
        if name == 'rebase':
            extensions.wrapcommand(getattr(module, 'cmdtable'), 'rebase',
                overrides.overriderebase)
        if name == 'transplant':
            extensions.wrapcommand(getattr(module, 'cmdtable'), 'transplant',
                overrides.overridetransplant)