improved svnmerge -- April 24, 2007 - 11:26

dear All
I have just tried to use svnmerge for the firdst time today and found it 
fairly hellish because it asks for you passphrase over and over again. 
However, I found this nice hack using expec

#!/usr/bin/expect --
#
# Wrap the svnmerge script, so we're only prompted for our password once.
#
# Written by Tilghman Lesher <repotools-mergetool@xxxxxxxxxxxxxxxx>
#

eval [ concat spawn /usr/bin/svnmerge.real [ lrange $argv 0 end ] ]

expect {
        "Passphrase for" {
                puts "ghere"
                stty -echo
                expect_user -re "(.*)\n"
                stty echo
                send "$expect_out(1,string)\r"
        }
}

expect_after eof exit
while (1) {
        expect {
                "Passphrase for" {
                        send "$expect_out(1,string)\r"
                }
        }

}

which I modified as follows

#!/usr/bin/expect --
#
# Wrap the svnmerge script, so we're only prompted for our password once.
#
# Written by Tilghman Lesher <repotools-mergetool@xxxxxxxxxxxxxxxx>
#
set home $env(HOME)
set svn_merge_path [file join $home bin/svnmerge.py]
eval [ concat spawn  $svn_merge_path  [ lrange $argv 0 end ] ]

expect {
       "*assphrase for" {
               stty -echo
               expect_user -re "(.*)\n"
               stty echo
               send "$expect_out(1,string)\r"
       }
}

expect_after eof exit
while (1) {
       expect
       expect {
               "*assphrase for" {
                       send "$expect_out(1,string)\r"
               }
       }
}

so
1. it now expects the real svnmerge.py to be in $HOME/bin
2. it had a capital P for passphrase which doesn't match all svn versions
3. I haven't managed to suppress all the extra printings of Enter 
passphrase for key ... yest but should be able to
4, it will crash if it doesn't see a Enter passphrase at all:
expect: spawn id exp4 not open
   while executing
"expect_after eof exit"
   (file "/usr/jessy/garyt/bin/svnmerge" line 20)
/

regards
gary

--
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Dr Gary Thompson
Astbury Centre for Structural Molecular Biology,
University of Leeds, Astbury Building,
Leeds, LS2 9JT, West-Yorkshire, UK             Tel. +44-113-3433024
email: garyt@xxxxxxxxxxxxxxx                   Fax  +44-113-2331407
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