summaryrefslogtreecommitdiffstats
path: root/CVSROOT/syncmail
blob: ba6cc90d069fddf54f390ab1ce2eb172ddadfbbe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
#! /usr/bin/python
#  -*- Python -*-

"""Complicated notification for CVS checkins.

This script is used to provide email notifications of changes to the CVS
repository.  These email changes will include context diffs of the changes.
Really big diffs will be trimmed.

This script is run from a CVS loginfo file (see $CVSROOT/CVSROOT/loginfo).  To
set this up, create a loginfo entry that looks something like this:

    mymodule /path/to/this/script %%s some-email-addr@your.domain

In this example, whenever a checkin that matches `mymodule' is made, this
script is invoked, which will generate the diff containing email, and send it
to some-email-addr@your.domain.

    Note: This module used to also do repository synchronizations via
    rsync-over-ssh, but since the repository has been moved to SourceForge,
    this is no longer necessary.  The syncing functionality has been ripped
    out in the 3.0, which simplifies it considerably.  Access the 2.x versions
    to refer to this functionality.  Because of this, the script is misnamed.

It no longer makes sense to run this script from the command line.  Doing so
will only print out this usage information.

Usage:

    %(PROGRAM)s [options] <%%S> email-addr [email-addr ...]

Where options is:

    --cvsroot=<path>
Use <path> as the environment variable CVSROOT.  Otherwise this
    	variable must exist in the environment.

    --help
    -h
        Print this text.

    --context=#
    -C #
        Include # lines of context around lines that differ (default: 2).

    -c
        Produce a context diff (default).

    -u
        Produce a unified diff (smaller, but harder to read).

    <%%S>
CVS %%s loginfo expansion.  When invoked by CVS, this will be a single
        string containing the directory the checkin is being made in, relative
        to $CVSROOT, followed by the list of files that are changing.  If the
        %%s in the loginfo file is %%{sVv}, context diffs for each of the
        modified files are included in any email messages that are generated.

    email-addrs
        At least one email address.

"""

import os
import sys
import string
import time
import getopt

# Notification command
MAILCMD = '/bin/mail -s "cvs: %(SUBJECT)s" %(PEOPLE)s 2>&1 > /dev/null'

# Diff trimming stuff
DIFF_HEAD_LINES = 20
DIFF_TAIL_LINES = 20
DIFF_TRUNCATE_IF_LARGER = 1000

PROGRAM = sys.argv[0]



def usage(code, msg=''):
    print __doc__ % globals()
    if msg:
        print msg
    sys.exit(code)



def calculate_diff(filespec, contextlines):
    try:
        file, oldrev, newrev = string.split(filespec, ',')
    except ValueError:
        # No diff to report
        return '***** Bogus filespec: %s' % filespec
    if oldrev == 'NONE':
        try:
            if os.path.exists(file):
                fp = open(file)
            else:
                update_cmd = 'cvs -fn update -r %s -p %s' % (newrev, file)
                fp = os.popen(update_cmd)
            lines = fp.readlines()
            fp.close()
            lines.insert(0, '--- NEW FILE: %s ---\n' % file)
        except IOError, e:
            lines = ['***** Error reading new file: ',
                     str(e), '\n***** file: ', file, ' cwd: ', os.getcwd()]
    elif newrev == 'NONE':
        lines = ['--- %s DELETED ---\n' % file]
    else:
        # This /has/ to happen in the background, otherwise we'll run into CVS
        # lock contention.  What a crock.
        if contextlines > 0:
            difftype = "-C " + str(contextlines)
        else:
            difftype = "-uN"
        diffcmd = '/usr/bin/cvs -f diff -kk %s -r %s -r %s %s' % (
            difftype, oldrev, newrev, file)
        fp = os.popen(diffcmd)
        lines = fp.readlines()
        sts = fp.close()
        # ignore the error code, it always seems to be 1 :(
##        if sts:
##            return 'Error code %d occurred during diff\n' % (sts >> 8)
    if len(lines) > DIFF_TRUNCATE_IF_LARGER:
        removedlines = len(lines) - DIFF_HEAD_LINES - DIFF_TAIL_LINES
        del lines[DIFF_HEAD_LINES:-DIFF_TAIL_LINES]
        lines.insert(DIFF_HEAD_LINES,
                     '[...%d lines suppressed...]\n' % removedlines)
    return string.join(lines, '')



def blast_mail(mailcmd, filestodiff, contextlines):
    # cannot wait for child process or that will cause parent to retain cvs
    # lock for too long.  Urg!
    if not os.fork():
        # in the child
        # give up the lock you cvs thang!
        time.sleep(2)
        fp = os.popen(mailcmd, 'w')
        fp.write(sys.stdin.read())
        fp.write('\n')
        # append the diffs if available
        for file in filestodiff:
            fp.write(calculate_diff(file, contextlines))
            fp.write('\n')
        fp.close()
        # doesn't matter what code we return, it isn't waited on
        os._exit(0)



# scan args for options
def main():
    contextlines = 2
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'hC:cu',
                                   ['context=', 'cvsroot=', 'help'])
    except getopt.error, msg:
        usage(1, msg)

    # parse the options
    for opt, arg in opts:
        if opt in ('-h', '--help'):
            usage(0)
        elif opt == '--cvsroot':
            os.environ['CVSROOT'] = arg
        elif opt in ('-C', '--context'):
            contextlines = int(arg)
        elif opt == '-c':
            if contextlines <= 0:
                contextlines = 2
        elif opt == '-u':
            contextlines = 0

    # What follows is the specification containing the files that were
    # modified.  The argument actually must be split, with the first component
    # containing the directory the checkin is being made in, relative to
    # $CVSROOT, followed by the list of files that are changing.
    if not args:
        usage(1, 'No CVS module specified')
    SUBJECT = args[0]
    specs = string.split(args[0])
    del args[0]

    # The remaining args should be the email addresses
    if not args:
        usage(1, 'No recipients specified')

    # Now do the mail command
    PEOPLE = string.join(args)
    mailcmd = MAILCMD % vars()

    print 'Mailing %s...' % PEOPLE
    if specs == ['-', 'Imported', 'sources']:
        return
    if specs[-3:] == ['-', 'New', 'directory']:
        del specs[-3:]
    print 'Generating notification message...'
    blast_mail(mailcmd, specs[1:], contextlines)
    print 'Generating notification message... done.'



if __name__ == '__main__':
    main()
    sys.exit(0)