| 1 | # -*- mode: python; coding: utf-8 -*- |
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| 2 | # :Progetto: vcpx -- CVS details |
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| 3 | # :Creato: mer 16 giu 2004 00:46:12 CEST |
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| 4 | # :Autore: Lele Gaifax <lele@nautilus.homeip.net> |
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| 5 | # :Licenza: GNU General Public License |
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| 6 | # |
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| 7 | |
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| 8 | """ |
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| 9 | This module contains supporting classes for CVS. To get a |
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| 10 | cross-repository revision number ala Subversion, the implementation |
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| 11 | uses `cvsps` to fetch the changes from the upstream repository. |
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| 12 | """ |
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| 13 | |
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| 14 | __docformat__ = 'reStructuredText' |
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| 15 | |
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| 16 | from shwrap import ExternalCommand, PIPE, STDOUT |
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| 17 | from source import UpdatableSourceWorkingDir, ChangesetApplicationFailure, \ |
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| 18 | InvocationError |
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| 19 | from target import SyncronizableTargetWorkingDir, TargetInitializationFailure |
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| 20 | |
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| 21 | CVS_CMD = 'cvs' |
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| 22 | CVSPS_CMD = 'cvsps' |
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| 23 | |
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| 24 | def changesets_from_cvsps(log, sincerev=None): |
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| 25 | """ |
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| 26 | Parse CVSps log. |
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| 27 | """ |
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| 28 | |
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| 29 | from changes import Changeset, ChangesetEntry |
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| 30 | from datetime import datetime |
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| 31 | from cvs import compare_cvs_revs |
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| 32 | |
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| 33 | # cvsps output sample: |
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| 34 | ## --------------------- |
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| 35 | ## PatchSet 1500 |
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| 36 | ## Date: 2004/05/09 17:54:22 |
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| 37 | ## Author: grubert |
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| 38 | ## Branch: HEAD |
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| 39 | ## Tag: (none) |
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| 40 | ## Log: |
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| 41 | ## Tell the reason for using mbox (not wrapping long lines). |
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| 42 | ## |
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| 43 | ## Members: |
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| 44 | ## docutils/writers/latex2e.py:1.78->1.79 |
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| 45 | |
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| 46 | l = None |
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| 47 | while 1: |
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| 48 | l = log.readline() |
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| 49 | if l <> '---------------------\n': |
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| 50 | break |
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| 51 | |
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| 52 | l = log.readline() |
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| 53 | assert l.startswith('PatchSet '), "Parse error: %s"%l |
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| 54 | |
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| 55 | pset = {} |
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| 56 | pset['revision'] = l[9:-1].strip() |
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| 57 | l = log.readline() |
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| 58 | while not l.startswith('Log:'): |
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| 59 | field,value = l.split(':',1) |
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| 60 | pset[field.lower()] = value.strip() |
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| 61 | l = log.readline() |
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| 62 | |
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| 63 | msg = [] |
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| 64 | l = log.readline() |
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| 65 | msg.append(l) |
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| 66 | l = log.readline() |
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| 67 | while l <> 'Members: \n': |
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| 68 | msg.append(l) |
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| 69 | l = log.readline() |
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| 70 | |
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| 71 | pset['log'] = ''.join(msg) |
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| 72 | |
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| 73 | assert l.startswith('Members:'), "Parse error: %s" % l |
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| 74 | |
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| 75 | pset['entries'] = entries = [] |
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| 76 | l = log.readline() |
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| 77 | seen = {} |
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| 78 | while l.startswith('\t'): |
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| 79 | if not sincerev or (sincerev<int(pset['revision'])): |
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| 80 | file,revs = l[1:-1].split(':') |
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| 81 | fromrev,torev = revs.strip().split('->') |
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| 82 | |
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| 83 | # Due to the fuzzy mechanism, cvsps may group |
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| 84 | # together two commits on a single entry, thus |
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| 85 | # giving something like: |
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| 86 | # |
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| 87 | # Normalizer.py:1.12->1.13 |
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| 88 | # Registry.py:1.22->1.23 |
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| 89 | # Registry.py:1.21->1.22 |
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| 90 | # Stopwords.py:1.9->1.10 |
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| 91 | # |
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| 92 | # Collapse those into a single one. |
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| 93 | |
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| 94 | e = seen.get(file) |
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| 95 | if not e: |
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| 96 | e = ChangesetEntry(file) |
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| 97 | e.old_revision = fromrev |
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| 98 | e.new_revision = torev |
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| 99 | seen[file] = e |
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| 100 | entries.append(e) |
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| 101 | else: |
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| 102 | if compare_cvs_revs(e.old_revision, fromrev)>0: |
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| 103 | e.old_revision = fromrev |
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| 104 | |
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| 105 | if compare_cvs_revs(e.new_revision, torev)<0: |
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| 106 | e.new_revision = torev |
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| 107 | |
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| 108 | if fromrev=='INITIAL': |
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| 109 | e.action_kind = e.ADDED |
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| 110 | elif "(DEAD)" in torev: |
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| 111 | e.action_kind = e.DELETED |
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| 112 | e.new_revision = torev[:torev.index('(DEAD)')] |
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| 113 | else: |
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| 114 | e.action_kind = e.UPDATED |
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| 115 | |
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| 116 | l = log.readline() |
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| 117 | |
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| 118 | if not sincerev or (sincerev<int(pset['revision'])): |
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| 119 | cvsdate = pset['date'] |
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| 120 | y,m,d = map(int, cvsdate[:10].split('/')) |
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| 121 | hh,mm,ss = map(int, cvsdate[11:19].split(':')) |
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| 122 | timestamp = datetime(y, m, d, hh, mm, ss) |
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| 123 | pset['date'] = timestamp |
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| 124 | |
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| 125 | yield Changeset(**pset) |
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| 126 | |
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| 127 | |
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| 128 | class CvspsWorkingDir(UpdatableSourceWorkingDir, |
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| 129 | SyncronizableTargetWorkingDir): |
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| 130 | |
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| 131 | """ |
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| 132 | An instance of this class represent a read/write CVS working directory, |
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| 133 | so that it can be used both as source of patches, or as a target |
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| 134 | repository. |
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| 135 | |
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| 136 | It uses `cvsps` to do the actual fetch of the changesets metadata |
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| 137 | from the server, so that we can reasonably group together related |
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| 138 | changes that would otherwise be sparsed, as CVS is file-centric. |
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| 139 | """ |
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| 140 | |
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| 141 | ## UpdatableSourceWorkingDir |
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| 142 | |
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| 143 | def _getUpstreamChangesets(self, root, repository, module, sincerev=None, |
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| 144 | branch=None): |
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| 145 | from os.path import join, exists |
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| 146 | |
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| 147 | if branch is None: |
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| 148 | branch="HEAD" |
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| 149 | fname = join(root, 'CVS', 'Tag') |
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| 150 | if exists(fname): |
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| 151 | tag = open(fname).read() |
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| 152 | if tag.startswith('T'): |
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| 153 | branch=tag[1:-1] |
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| 154 | |
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| 155 | if sincerev: |
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| 156 | sincerev = int(sincerev) |
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| 157 | |
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| 158 | changesets = [] |
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| 159 | cmd = [CVSPS_CMD, "--cvs-direct", "-u", "-b", branch, |
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| 160 | "--root", repository] |
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| 161 | cvsps = ExternalCommand(command=cmd) |
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| 162 | log = cvsps.execute(module, stdout=PIPE, TZ='UTC') |
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| 163 | |
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| 164 | for cs in changesets_from_cvsps(log, sincerev): |
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| 165 | changesets.append(cs) |
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| 166 | |
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| 167 | return changesets |
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| 168 | |
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| 169 | def __maybeDeleteDirectory(self, root, entrydir, changeset): |
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| 170 | from os.path import join, exists |
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| 171 | from os import listdir |
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| 172 | |
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| 173 | if not entrydir: |
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| 174 | return |
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| 175 | |
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| 176 | absentrydir = join(root, entrydir) |
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| 177 | if not exists(absentrydir) or listdir(absentrydir) == ['CVS']: |
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| 178 | deldir = changeset.addEntry(entrydir, None) |
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| 179 | deldir.action_kind = deldir.DELETED |
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| 180 | |
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| 181 | def _applyChangeset(self, root, changeset, logger=None): |
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| 182 | from os.path import join, exists, dirname, split |
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| 183 | from os import makedirs, listdir |
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| 184 | from shutil import rmtree |
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| 185 | from cvs import CvsEntries |
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| 186 | from time import sleep |
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| 187 | |
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| 188 | entries = CvsEntries(root) |
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| 189 | |
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| 190 | for e in changeset.entries: |
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| 191 | if e.action_kind == e.UPDATED: |
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| 192 | info = entries.getFileInfo(e.name) |
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| 193 | if not info: |
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| 194 | if logger: logger.info("promoting '%s' to ADDED at " |
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| 195 | "revision %s", e.name, |
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| 196 | e.new_revision) |
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| 197 | e.action_kind = e.ADDED |
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| 198 | self.__createParentCVSDirectories(changeset, root, e.name) |
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| 199 | elif info.cvs_version == e.new_revision: |
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| 200 | if logger: logger.debug("skipping '%s' since it's already " |
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| 201 | "at revision %s", e.name, |
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| 202 | e.new_revision) |
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| 203 | continue |
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| 204 | elif e.action_kind == e.DELETED: |
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| 205 | if not exists(join(root, e.name)): |
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| 206 | if logger: logger.debug("skipping '%s' since it's already " |
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| 207 | "deleted", e.name) |
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| 208 | self.__maybeDeleteDirectory(root, split(e.name)[0], |
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| 209 | changeset) |
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| 210 | continue |
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| 211 | elif e.action_kind == e.ADDED and e.new_revision is None: |
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| 212 | # This is a new directory entry, there is no need to update it |
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| 213 | continue |
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| 214 | |
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| 215 | # If this is a directory (CVS does not version directories, |
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| 216 | # and thus new_revision is always None for them), and it's |
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| 217 | # going to be deleted, do not execute a 'cvs update', that |
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| 218 | # in some cases does not what one would expect. Instead, |
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| 219 | # remove it with everything it contains (that should be |
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| 220 | # just a single "CVS" subdir, btw) |
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| 221 | |
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| 222 | if e.action_kind == e.DELETED and e.new_revision is None: |
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| 223 | assert listdir(join(root, e.name)) == ['CVS'], '%s should be empty' % e.name |
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| 224 | rmtree(join(root, e.name)) |
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| 225 | else: |
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| 226 | cmd = [CVS_CMD, "-q", "update", "-d", "-r", e.new_revision] |
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| 227 | cvsup = ExternalCommand(cwd=root, command=cmd) |
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| 228 | retry = 0 |
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| 229 | while True: |
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| 230 | cvsup.execute(e.name, stdout=PIPE) |
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| 231 | |
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| 232 | if cvsup.exit_status: |
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| 233 | retry += 1 |
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| 234 | if retry>3: |
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| 235 | break |
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| 236 | delay = 2**retry |
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| 237 | if logger: |
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| 238 | logger.warning("%s returned status %s, " |
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| 239 | "retrying in %d seconds..." % |
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| 240 | (str(cvsup), cvsup.exit_status, |
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| 241 | delay)) |
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| 242 | sleep(retry) |
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| 243 | else: |
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| 244 | break |
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| 245 | |
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| 246 | if cvsup.exit_status: |
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| 247 | raise ChangesetApplicationFailure( |
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| 248 | "%s returned status %s" % (str(cvsup), |
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| 249 | cvsup.exit_status)) |
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| 250 | |
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| 251 | if logger: logger.info("%s updated to %s" % (e.name, |
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| 252 | e.new_revision)) |
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| 253 | |
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| 254 | if e.action_kind == e.DELETED: |
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| 255 | self.__maybeDeleteDirectory(root, split(e.name)[0], changeset) |
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| 256 | |
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| 257 | def _checkoutUpstreamRevision(self, basedir, repository, module, revision, |
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| 258 | subdir=None, logger=None, **kwargs): |
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| 259 | """ |
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| 260 | Concretely do the checkout of the upstream sources. Use `revision` as |
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| 261 | the name of the tag to get, or as a date if it starts with a number. |
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| 262 | |
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| 263 | Return the last applied changeset. |
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| 264 | """ |
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| 265 | |
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| 266 | from os.path import join, exists |
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| 267 | from cvs import CvsEntries, compare_cvs_revs |
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| 268 | |
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| 269 | if not module: |
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| 270 | raise InvocationError("Must specify a module name") |
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| 271 | |
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| 272 | timestamp = None |
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| 273 | if revision is not None: |
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| 274 | # If the revision contains a space, assume it really |
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| 275 | # specify a branch and a timestamp. If it starts with |
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| 276 | # a digit, assume it's a timestamp. Otherwise, it must |
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| 277 | # be a branch name |
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| 278 | if revision[0] in '0123456789' or revision == 'INITIAL': |
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| 279 | timestamp = revision |
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| 280 | revision = None |
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| 281 | elif ' ' in revision: |
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| 282 | revision, timestamp = revision.split(' ', 1) |
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| 283 | |
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| 284 | wdir = join(basedir, subdir) |
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| 285 | csets = self._getUpstreamChangesets(wdir, repository, module, |
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| 286 | branch=revision or 'HEAD') |
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| 287 | csets.reverse() |
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| 288 | |
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| 289 | if timestamp == 'INITIAL': |
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| 290 | timestamp = csets[-1].date.isoformat(sep=' ') |
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| 291 | |
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| 292 | if not exists(join(wdir, 'CVS')): |
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| 293 | cmd = [CVS_CMD, "-q", "-d", repository, "checkout", |
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| 294 | "-d", subdir] |
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| 295 | if revision: |
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| 296 | cmd.extend(["-r", revision]) |
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| 297 | if timestamp: |
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| 298 | cmd.extend(["-D", "%s UTC" % timestamp]) |
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| 299 | |
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| 300 | checkout = ExternalCommand(cwd=basedir, command=cmd) |
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| 301 | checkout.execute(module) |
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| 302 | |
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| 303 | if checkout.exit_status: |
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| 304 | raise TargetInitializationFailure( |
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| 305 | "%s returned status %s" % (str(checkout), |
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| 306 | checkout.exit_status)) |
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| 307 | else: |
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| 308 | if logger: logger.info("Using existing %s", wdir) |
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| 309 | |
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| 310 | self.__forceTagOnEachEntry(wdir) |
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| 311 | |
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| 312 | entries = CvsEntries(wdir) |
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| 313 | |
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| 314 | # update cvsps cache, then loop over the changesets and find the |
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| 315 | # last applied, to find out the actual cvsps revision |
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| 316 | |
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| 317 | found = False |
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| 318 | for cset in csets: |
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| 319 | for m in cset.entries: |
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| 320 | info = entries.getFileInfo(m.name) |
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| 321 | if info: |
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| 322 | actualversion = info.cvs_version |
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| 323 | found = compare_cvs_revs(actualversion,m.new_revision)>=0 |
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| 324 | if not found: |
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| 325 | break |
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| 326 | |
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| 327 | if found: |
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| 328 | last = cset |
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| 329 | break |
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| 330 | |
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| 331 | if not found: |
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| 332 | raise TargetInitializationFailure( |
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| 333 | "Something went wrong: unable to determine the exact upstream " |
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| 334 | "revision of the checked out tree in '%s'" % wdir) |
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| 335 | else: |
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| 336 | if logger: logger.info("working copy up to cvsps revision %s", |
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| 337 | last.revision) |
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| 338 | |
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| 339 | return last |
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| 340 | |
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| 341 | def _willApplyChangeset(self, root, changeset, applyable=None): |
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| 342 | """ |
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| 343 | This gets called just before applying each changeset. |
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| 344 | |
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| 345 | Since CVS has no "createdir" event, we have to take care |
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| 346 | of new directories, creating empty-but-reasonable CVS dirs. |
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| 347 | """ |
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| 348 | |
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| 349 | if UpdatableSourceWorkingDir._willApplyChangeset(self, root, changeset, |
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| 350 | applyable): |
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| 351 | for m in changeset.entries: |
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| 352 | if m.action_kind == m.ADDED: |
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| 353 | self.__createParentCVSDirectories(changeset, root, m.name) |
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| 354 | |
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| 355 | return True |
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| 356 | else: |
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| 357 | return False |
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| 358 | |
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| 359 | def __createParentCVSDirectories(self, changeset, root, entry): |
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| 360 | """ |
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| 361 | Verify that the hierarchy down to the entry is under CVS. |
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| 362 | |
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| 363 | If the directory containing the entry does not exists, |
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| 364 | create it and make it appear as under CVS so that succeding |
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| 365 | 'cvs update' will work. |
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| 366 | """ |
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| 367 | |
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| 368 | from os.path import split, join, exists |
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| 369 | from os import mkdir |
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| 370 | |
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| 371 | path = split(entry)[0] |
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| 372 | if path: |
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| 373 | basedir = join(root, path) |
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| 374 | else: |
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| 375 | basedir = root |
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| 376 | cvsarea = join(basedir, 'CVS') |
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| 377 | |
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| 378 | if path and not exists(cvsarea): |
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| 379 | parentcvs = self.__createParentCVSDirectories(changeset, |
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| 380 | root, path) |
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| 381 | |
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| 382 | assert exists(parentcvs), "Uhm, strange things happen" |
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| 383 | |
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| 384 | if not exists(basedir): |
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| 385 | mkdir(basedir) |
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| 386 | |
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| 387 | # Create fake CVS area |
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| 388 | mkdir(cvsarea) |
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| 389 | |
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| 390 | # Create an empty "Entries" file |
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| 391 | entries = open(join(cvsarea, 'Entries'), 'w') |
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| 392 | entries.close() |
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| 393 | |
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| 394 | reposf = open(join(parentcvs, 'Repository')) |
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| 395 | rep = reposf.readline()[:-1] |
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| 396 | reposf.close() |
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| 397 | |
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| 398 | reposf = open(join(cvsarea, 'Repository'), 'w') |
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| 399 | reposf.write("%s/%s\n" % (rep, split(basedir)[1])) |
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| 400 | reposf.close() |
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| 401 | |
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| 402 | rootf = open(join(parentcvs, 'Root')) |
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| 403 | root = rootf.readline() |
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| 404 | rootf.close() |
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| 405 | |
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| 406 | rootf = open(join(cvsarea, 'Root'), 'w') |
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| 407 | rootf.write(root) |
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| 408 | rootf.close() |
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| 409 | |
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| 410 | # Add the "new" directory to the changeset, so that the |
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| 411 | # replayer get its name |
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| 412 | |
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| 413 | entry = changeset.addEntry(path, None) |
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| 414 | entry.action_kind = entry.ADDED |
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| 415 | |
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| 416 | return cvsarea |
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| 417 | |
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| 418 | ## SyncronizableTargetWorkingDir |
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| 419 | |
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| 420 | def _addPathnames(self, root, names): |
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| 421 | """ |
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| 422 | Add some new filesystem objects. |
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| 423 | """ |
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| 424 | |
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| 425 | cmd = [CVS_CMD, "-q", "add"] |
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| 426 | ExternalCommand(cwd=root, command=cmd).execute(names) |
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| 427 | |
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| 428 | def __forceTagOnEachEntry(self, root): |
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| 429 | """ |
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| 430 | Massage each CVS/Entries file, locking (ie, tagging) each |
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| 431 | entry to its current CVS version. |
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| 432 | |
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| 433 | This is to prevent silly errors such those that could arise |
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| 434 | after a manual ``cvs update`` in the working directory. |
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| 435 | """ |
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| 436 | |
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| 437 | from os import walk, rename |
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| 438 | from os.path import join |
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| 439 | |
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| 440 | for dir, subdirs, files in walk(root): |
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| 441 | if dir[-3:] == 'CVS': |
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| 442 | efn = join(dir, 'Entries') |
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| 443 | f = open(efn) |
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| 444 | entries = f.readlines() |
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| 445 | f.close() |
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| 446 | rename(efn, efn+'.old') |
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| 447 | |
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| 448 | newentries = [] |
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| 449 | for e in entries: |
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| 450 | if e.startswith('/'): |
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| 451 | fields = e.split('/') |
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| 452 | fields[-1] = "T%s\n" % fields[2] |
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| 453 | newe = '/'.join(fields) |
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| 454 | newentries.append(newe) |
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| 455 | else: |
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| 456 | newentries.append(e) |
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| 457 | |
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| 458 | f = open(efn, 'w') |
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| 459 | f.writelines(newentries) |
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| 460 | f.close() |
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| 461 | |
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| 462 | def _getCommitEntries(self, changeset): |
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| 463 | """ |
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| 464 | Extract the names of the entries for the commit phase. Since CVS |
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| 465 | does not have a "rename" operation, this is simulated by a |
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| 466 | remove+add, and both entries must be committed. |
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| 467 | """ |
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| 468 | |
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| 469 | entries = SyncronizableTargetWorkingDir._getCommitEntries(self, |
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| 470 | changeset) |
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| 471 | entries.extend([e.old_name for e in changeset.renamedEntries()]) |
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| 472 | |
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| 473 | return entries |
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| 474 | |
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| 475 | def _commit(self,root, date, author, remark, changelog=None, entries=None): |
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| 476 | """ |
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| 477 | Commit the changeset. |
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| 478 | """ |
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| 479 | |
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| 480 | from shwrap import ReopenableNamedTemporaryFile |
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| 481 | from sys import getdefaultencoding |
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| 482 | |
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| 483 | encoding = ExternalCommand.FORCE_ENCODING or getdefaultencoding() |
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| 484 | |
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| 485 | logmessage = [] |
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| 486 | if remark: |
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| 487 | logmessage.append(remark.encode(encoding)) |
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| 488 | if changelog: |
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| 489 | logmessage.append(changelog.replace('%', '%%').encode(encoding)) |
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| 490 | logmessage.append('') |
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| 491 | logmessage.append('Original author: %s' % author.encode(encoding)) |
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| 492 | logmessage.append('Date: %s' % date) |
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| 493 | logmessage.append('') |
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| 494 | |
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| 495 | rontf = ReopenableNamedTemporaryFile('cvs', 'tailor') |
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| 496 | log = open(rontf.name, "w") |
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| 497 | log.write('\n'.join(log)) |
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| 498 | log.close() |
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| 499 | |
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| 500 | cmd = [CVS_CMD, "-q", "ci", "-F", rontf.name] |
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| 501 | if not entries: |
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| 502 | entries = ['.'] |
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| 503 | |
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| 504 | ExternalCommand(cwd=root, command=cmd).execute(entries) |
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| 505 | |
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| 506 | def _removePathnames(self, root, names): |
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| 507 | """ |
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| 508 | Remove some filesystem objects. |
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| 509 | """ |
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| 510 | |
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| 511 | cmd = [CVS_CMD, "-q", "remove"] |
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| 512 | ExternalCommand(cwd=root, command=cmd).execute(names) |
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| 513 | |
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| 514 | def _renamePathname(self, root, oldname, newname): |
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| 515 | """ |
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| 516 | Rename a filesystem object. |
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| 517 | """ |
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| 518 | |
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| 519 | self._removePathnames(root, [oldname]) |
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| 520 | self._addPathnames(root, [newname]) |
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