| 1 | #! /usr/bin/python |
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| 2 | # -*- mode: python; coding: utf-8 -*- |
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| 3 | # :Progetto: vcpx -- Pure CVS solution |
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| 4 | # :Creato: dom 11 lug 2004 01:59:36 CEST |
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| 5 | # :Autore: Lele Gaifax <lele@nautilus.homeip.net> |
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| 6 | # |
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| 7 | |
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| 8 | """ |
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| 9 | Given `cvsps` shortcomings, this backend uses CVS only. |
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| 10 | """ |
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| 11 | |
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| 12 | __docformat__ = 'reStructuredText' |
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| 13 | |
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| 14 | from shwrap import SystemCommand |
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| 15 | from cvsps import CvspsWorkingDir |
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| 16 | |
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| 17 | |
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| 18 | def compare_cvs_revs(rev1, rev2): |
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| 19 | """Compare two CVS revision numerically, not alphabetically.""" |
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| 20 | |
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| 21 | if not rev1: rev1 = '0' |
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| 22 | if not rev2: rev2 = '0' |
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| 23 | |
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| 24 | r1 = [int(n) for n in rev1.split('.')] |
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| 25 | r2 = [int(n) for n in rev2.split('.')] |
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| 26 | |
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| 27 | return cmp(r1, r2) |
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| 28 | |
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| 29 | |
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| 30 | class CvsLog(SystemCommand): |
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| 31 | COMMAND = "cvs log -N -S %(branch)s %(since)s 2>/dev/null" |
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| 32 | |
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| 33 | def __call__(self, output=None, dry_run=False, **kwargs): |
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| 34 | since = kwargs.get('since') |
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| 35 | if since: |
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| 36 | kwargs['since'] = "-d'%s<'" % since |
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| 37 | else: |
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| 38 | kwargs['since'] = '' |
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| 39 | |
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| 40 | branch = kwargs.get('branch') |
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| 41 | if branch: |
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| 42 | kwargs['branch'] = "-r%s" % branch |
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| 43 | else: |
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| 44 | kwargs['branch'] = '' |
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| 45 | |
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| 46 | return SystemCommand.__call__(self, output=output, |
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| 47 | dry_run=dry_run, **kwargs) |
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| 48 | |
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| 49 | def changesets_from_cvslog(log, sincerev=None): |
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| 50 | """ |
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| 51 | Parse CVS log. |
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| 52 | """ |
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| 53 | |
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| 54 | ## RCS file: /cvsroot/docutils/docutils/THANKS.txt,v |
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| 55 | ## Working file: THANKS.txt |
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| 56 | ## head: 1.2 |
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| 57 | ## branch: |
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| 58 | ## locks: strict |
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| 59 | ## access list: |
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| 60 | ## symbolic names: |
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| 61 | ## keyword substitution: kv |
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| 62 | ## total revisions: 2; selected revisions: 2 |
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| 63 | ## description: |
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| 64 | ## ---------------------------- |
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| 65 | ## revision 1.2 |
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| 66 | ## date: 2004/06/10 02:17:20; author: goodger; state: Exp; lines: +3 -2 |
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| 67 | ## updated |
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| 68 | ## ---------------------------- |
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| 69 | ## revision 1.1 |
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| 70 | ## date: 2004/06/03 13:50:58; author: goodger; state: Exp; |
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| 71 | ## Added to project (exctracted from HISTORY.txt) |
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| 72 | ## =====================================================================... |
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| 73 | |
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| 74 | from datetime import timedelta |
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| 75 | |
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| 76 | collected = ChangeSetCollector(log) |
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| 77 | collapsed = [] |
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| 78 | |
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| 79 | threshold = timedelta(seconds=180) |
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| 80 | last = None |
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| 81 | |
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| 82 | for cs in collected: |
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| 83 | if not last: |
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| 84 | last = cs |
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| 85 | collapsed.append(cs) |
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| 86 | else: |
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| 87 | if last.author == cs.author and \ |
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| 88 | last.log == cs.log and \ |
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| 89 | abs(last.date - cs.date) < threshold: |
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| 90 | last.entries.extend(cs.entries) |
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| 91 | else: |
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| 92 | last = cs |
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| 93 | collapsed.append(cs) |
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| 94 | |
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| 95 | for cs in collapsed: |
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| 96 | yield cs |
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| 97 | |
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| 98 | class ChangeSetCollector(object): |
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| 99 | """Collector of the applied change sets.""" |
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| 100 | |
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| 101 | def __init__(self, log): |
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| 102 | """ |
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| 103 | Initialize a ChangeSetCollector instance. |
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| 104 | |
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| 105 | Loop over the modified entries and collect their logs. |
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| 106 | """ |
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| 107 | |
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| 108 | self.changesets = {} |
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| 109 | """The dictionary mapping (date, author, log) to each entry.""" |
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| 110 | |
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| 111 | self.__parseCvsLog(log) |
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| 112 | |
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| 113 | def __iter__(self): |
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| 114 | keys = self.changesets.keys() |
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| 115 | keys.sort() |
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| 116 | return iter([self.changesets[k] for k in keys]) |
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| 117 | |
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| 118 | def __getGlobalRevision(self, timestamp, author, changelog): |
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| 119 | """ |
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| 120 | CVS does not have the notion of a repository-wide revision number, |
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| 121 | since it tracks just single files. |
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| 122 | |
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| 123 | Here we could "count" the grouped changesets ala `cvsps`, |
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| 124 | but that's tricky because of branches. Since right now there |
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| 125 | is nothing that depends on this being a number, not to mention |
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| 126 | a *serial* number, simply emit a (hopefully) unique signature... |
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| 127 | """ |
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| 128 | |
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| 129 | # NB: the _getUpstreamChangesets() below depends on this format |
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| 130 | |
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| 131 | return str(timestamp) |
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| 132 | |
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| 133 | def __collect(self, timestamp, author, changelog, entry, revision): |
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| 134 | """Register a change set about an entry.""" |
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| 135 | |
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| 136 | from changes import Changeset |
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| 137 | |
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| 138 | key = (timestamp, author, changelog) |
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| 139 | if self.changesets.has_key(key): |
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| 140 | return self.changesets[key].addEntry(entry, revision) |
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| 141 | else: |
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| 142 | cs = Changeset(self.__getGlobalRevision(timestamp, |
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| 143 | author, |
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| 144 | changelog), |
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| 145 | timestamp, author, changelog) |
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| 146 | self.changesets[key] = cs |
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| 147 | return cs.addEntry(entry, revision) |
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| 148 | |
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| 149 | def __parseRevision(self, entry, log): |
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| 150 | """Parse a single revision log, extracting the needed information |
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| 151 | and register it. |
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| 152 | |
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| 153 | Return None when there are no more logs to be parsed, |
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| 154 | otherwise the revision number.""" |
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| 155 | |
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| 156 | from datetime import datetime |
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| 157 | |
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| 158 | revision = log.readline() |
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| 159 | if not revision or not revision.startswith('revision '): |
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| 160 | return None |
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| 161 | rev = revision[9:-1] |
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| 162 | |
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| 163 | infoline = log.readline() |
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| 164 | |
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| 165 | info = infoline.split(';') |
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| 166 | |
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| 167 | assert info[0][:6] == 'date: ' |
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| 168 | |
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| 169 | day,time = info[0][6:].split(' ') |
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| 170 | y,m,d = map(int, day.split(day[4])) |
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| 171 | hh,mm,ss = map(int, time.split(':')) |
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| 172 | date = datetime(y,m,d,hh,mm,ss) |
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| 173 | |
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| 174 | assert info[1].strip()[:8] == 'author: ' |
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| 175 | |
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| 176 | author = info[1].strip()[8:] |
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| 177 | |
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| 178 | assert info[2].strip()[:7] == 'state: ' |
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| 179 | |
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| 180 | state = info[2].strip()[7:] |
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| 181 | |
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| 182 | # The next line may be either the first of the changelog or a |
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| 183 | # continuation (?) of the preceeding info line with the |
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| 184 | # "branches" |
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| 185 | |
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| 186 | l = log.readline() |
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| 187 | if l.startswith('branches: ') and l.endswith(';\n'): |
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| 188 | infoline = infoline[:-1] + ';' + l |
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| 189 | # read the effective first line of log |
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| 190 | l = log.readline() |
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| 191 | |
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| 192 | mesg = [] |
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| 193 | while (l <> '----------------------------\n' and |
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| 194 | l <> '=============================================================================\n'): |
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| 195 | mesg.append(l[:-1]) |
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| 196 | l = log.readline() |
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| 197 | |
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| 198 | if len(mesg)==1 and mesg[0] == '*** empty log message ***': |
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| 199 | changelog = '' |
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| 200 | else: |
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| 201 | changelog = '\n'.join(mesg) |
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| 202 | |
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| 203 | return (date, author, changelog, entry, rev, state) |
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| 204 | |
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| 205 | def __parseCvsLog(self, log): |
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| 206 | """Parse a complete CVS log.""" |
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| 207 | |
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| 208 | while 1: |
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| 209 | l = log.readline() |
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| 210 | while l and not l.startswith('Working file: '): |
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| 211 | l = log.readline() |
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| 212 | |
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| 213 | if not l.startswith('Working file: '): |
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| 214 | break |
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| 215 | |
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| 216 | entry = l[14:-1] |
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| 217 | |
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| 218 | l = log.readline() |
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| 219 | while l and not l.startswith('total revisions: '): |
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| 220 | l = log.readline() |
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| 221 | |
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| 222 | assert l.startswith('total revisions: ') |
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| 223 | |
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| 224 | total, selected = l.split(';') |
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| 225 | total = total.strip() |
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| 226 | selected = selected.strip() |
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| 227 | |
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| 228 | # If the log shows all changes to the entry, than it's |
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| 229 | # a new one |
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| 230 | |
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| 231 | newentry = total.split(':')[1] == selected.split(':')[1] |
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| 232 | |
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| 233 | l = log.readline() |
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| 234 | while l and l <> '----------------------------\n': |
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| 235 | l = log.readline() |
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| 236 | |
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| 237 | cs = self.__parseRevision(entry, log) |
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| 238 | while cs: |
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| 239 | date,author,changelog,e,rev,state = cs |
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| 240 | |
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| 241 | last = self.__collect(date, author, changelog, e, rev) |
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| 242 | if state == 'dead': |
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| 243 | last.action_kind = last.DELETED |
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| 244 | else: |
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| 245 | last.action_kind = last.UPDATED |
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| 246 | |
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| 247 | cs = self.__parseRevision(entry, log) |
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| 248 | |
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| 249 | if newentry: |
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| 250 | last.action_kind = last.ADDED |
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| 251 | |
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| 252 | |
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| 253 | class CvsWorkingDir(CvspsWorkingDir): |
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| 254 | """ |
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| 255 | Reimplement the mechanism used to get a *changeset* view of the |
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| 256 | CVS commits. |
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| 257 | """ |
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| 258 | |
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| 259 | def _getUpstreamChangesets(self, root, sincerev=None): |
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| 260 | cvslog = CvsLog(working_dir=root) |
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| 261 | |
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| 262 | from os.path import join, exists |
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| 263 | |
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| 264 | if not sincerev: |
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| 265 | # We are bootstrapping, trying to collimate the |
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| 266 | # actual revision on disk with the changesets. |
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| 267 | # Start from the ancient entry timestamp. |
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| 268 | entries = CvsEntries(root) |
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| 269 | ancient = entries.getAncientEntry() |
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| 270 | since = ancient.timestamp.isoformat(sep=' ') |
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| 271 | else: |
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| 272 | # Assume this is from __getGlobalRevision() |
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| 273 | since = sincerev |
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| 274 | |
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| 275 | branch = '' |
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| 276 | fname = join(root, 'CVS', 'Tag') |
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| 277 | if exists(fname): |
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| 278 | tag = open(fname).read() |
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| 279 | if tag.startswith('T'): |
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| 280 | branch=tag[1:-1] |
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| 281 | |
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| 282 | changesets = [] |
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| 283 | log = cvslog(output=True, since=since, branch=branch) |
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| 284 | for cs in changesets_from_cvslog(log, sincerev): |
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| 285 | changesets.append(cs) |
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| 286 | |
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| 287 | return changesets |
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| 288 | |
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| 289 | |
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| 290 | class CvsEntry(object): |
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| 291 | """Collect the info about a file in a CVS working dir.""" |
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| 292 | |
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| 293 | __slots__ = ('filename', 'cvs_version', 'timestamp', 'cvs_tag') |
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| 294 | |
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| 295 | def __init__(self, entry): |
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| 296 | """Initialize a CvsEntry.""" |
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| 297 | |
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| 298 | from datetime import datetime |
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| 299 | from time import strptime |
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| 300 | |
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| 301 | dummy, fn, rev, ts, dummy, tag = entry.split('/') |
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| 302 | self.filename = fn |
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| 303 | self.cvs_version = rev |
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| 304 | y,m,d,hh,mm,ss,d1,d2,d3 = strptime(ts, "%a %b %d %H:%M:%S %Y") |
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| 305 | self.timestamp = datetime(y,m,d,hh,mm,ss) |
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| 306 | self.cvs_tag = tag |
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| 307 | |
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| 308 | def __str__(self): |
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| 309 | return "CvsEntry('%s', '%s', '%s')" % (self.filename, |
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| 310 | self.cvs_version, |
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| 311 | self.cvs_tag) |
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| 312 | |
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| 313 | |
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| 314 | class CvsEntries(object): |
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| 315 | """Collection of CvsEntry.""" |
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| 316 | |
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| 317 | __slots__ = ('files', 'directories', 'deleted') |
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| 318 | |
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| 319 | def __init__(self, root): |
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| 320 | """Parse CVS/Entries file. |
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| 321 | |
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| 322 | Walk down the working directory, collecting info from each |
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| 323 | CVS/Entries found.""" |
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| 324 | |
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| 325 | from os.path import join, exists, isdir |
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| 326 | from os import listdir |
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| 327 | |
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| 328 | self.files = {} |
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| 329 | """Dict of `CvsEntry`, keyed on each file under revision control.""" |
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| 330 | |
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| 331 | self.directories = {} |
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| 332 | """Dict of `CvsEntries`, keyed on subdirectories under revision |
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| 333 | control.""" |
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| 334 | |
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| 335 | self.deleted = False |
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| 336 | """Flag to denote that this directory was removed.""" |
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| 337 | |
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| 338 | entries = join(root, 'CVS/Entries') |
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| 339 | if exists(entries): |
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| 340 | for entry in open(entries).readlines(): |
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| 341 | entry = entry[:-1] |
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| 342 | |
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| 343 | if entry.startswith('/'): |
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| 344 | e = CvsEntry(entry) |
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| 345 | if file and e.filename==file: |
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| 346 | return e |
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| 347 | else: |
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| 348 | self.files[e.filename] = e |
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| 349 | elif entry.startswith('D/'): |
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| 350 | d = entry.split('/')[1] |
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| 351 | subdir = CvsEntries(join(root, d)) |
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| 352 | self.directories[d] = subdir |
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| 353 | elif entry == 'D': |
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| 354 | self.deleted = True |
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| 355 | |
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| 356 | # Sometimes the Entries file does not contain the directories: |
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| 357 | # crawl the current directory looking for missing ones. |
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| 358 | |
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| 359 | for entry in listdir(root): |
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| 360 | if entry == '.svn': |
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| 361 | continue |
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| 362 | dir = join(root, entry) |
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| 363 | if (isdir(dir) and exists(join(dir, 'CVS/Entries')) |
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| 364 | and not self.directories.has_key(entry)): |
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| 365 | self.directories[entry] = CvsEntries(dir) |
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| 366 | |
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| 367 | if self.deleted: |
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| 368 | self.deleted = not self.files and not self.directories |
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| 369 | |
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| 370 | def __str__(self): |
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| 371 | return "CvsEntries(%d files, %d subdirectories)" % ( |
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| 372 | len(self.files), len(self.directories)) |
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| 373 | |
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| 374 | def getFileInfo(self, fpath): |
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| 375 | """Fetch the info about a path, if known. Otherwise return None.""" |
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| 376 | |
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| 377 | try: |
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| 378 | if '/' in fpath: |
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| 379 | dir,rest = fpath.split('/', 1) |
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| 380 | return self.directories[dir].getFileInfo(rest) |
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| 381 | else: |
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| 382 | return self.files[fpath] |
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| 383 | except KeyError: |
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| 384 | return None |
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| 385 | |
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| 386 | def getAncientEntry(self): |
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| 387 | latest = None |
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| 388 | for e in self.files.values(): |
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| 389 | if not latest: |
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| 390 | latest = e |
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| 391 | |
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| 392 | if e.timestamp < latest.timestamp: |
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| 393 | latest = e |
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| 394 | |
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| 395 | for d in self.directories.values(): |
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| 396 | e = d.getAncientEntry() |
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| 397 | |
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| 398 | if not latest: |
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| 399 | latest = e |
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| 400 | |
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| 401 | if e.timestamp < latest.timestamp: |
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| 402 | latest = e |
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| 403 | |
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| 404 | return latest |
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| 405 | |
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