SVN post-commit hook: email file owner

30 May, 2012

It’s a common enough situation: we want SVN to email a notification to developers when somebody modifies a file they are in control of. SVN post-commit hooks let us send an email when the file is modified; but how do we determine to whom that email should be sent?

I came up with two solutions. Neither is very clever, but they both give a little clue at least. The first looks through the log and determines who has committed changes to that file the greatest number of times. The second looks at the blame log for the file to determine who has modified the most lines in the file. My script just emails both people

Just copy the script below and call it from your post-commit file to get started. You’ll want to change the value of DOMAIN to match the domain you want to email notifications to. The third parameter is the name of the project, so you can use the script for multiple repositories.

I just threw this script together so it’s nothing special – if you’d like to make improvements why not fork the gist?

#!/usr/bin/env bash
LOOK=/usr/bin/svnlook
REPOS="$1"
REV="$2"
PROJECT="$3"
AUTHOR=$($LOOK author $REPOS -r $REV)
DOMAIN=domain.com
OWNERS=""
for FILE in $($LOOK changed $REPOS -r $REV | awk '{ print $2 }')
do
        OWNER_LOG=$(svn log "file://$REPOS/$FILE" 2> /dev/null | grep "^r[0-9]* | " | awk '{ print $3 }' | sort | uniq -c | sort | tail -n 1 | awk '{ print $2 }')
        if [[ "$OWNER_LOG" != "$AUTHOR" && "$OWNERS" != *" $OWNER_LOG "* ]]
        then
                OWNERS="$OWNERS $OWNER_LOG "
        fi
        OWNER_BLAME=$(svn blame -x "-w --ignore-eol-style" "file://$REPOS/$FILE" 2> /dev/null | awk '{ print $2 }' | sort | uniq -c | sort | tail -n 1 | awk '{ print $2 }')
        if [[ "$OWNER_BLAME" != "" && "$OWNER_BLAME" != "$AUTHOR" && "$OWNERS" != *" $OWNER_BLAME "* ]]
        then
                OWNERS="$OWNERS $OWNER_BLAME "
        fi
done
if [[ "$OWNERS" != "" ]]
then
        RECIPIENTS=$(for PERSON in $OWNERS; do echo -n "--to $PERSON@$DOMAIN "; 
done)
        /usr/local/bin/svnnotify                          \\
            --repos-path     "$REPOS"                     \\
            --revision       "$REV"                       \\
            --subject-prefix "[$PROJECT-svn]"             \\
            --attach-diff                                 \\
            --diff-switches  '-x "-w --ignore-eol-style"' \\
            --user-domain    $DOMAIN                      \\
            $RECIPIENTS
fi
Tagged with: bash, scripts, subversion