[SCM] Write fetch script for bf git

[jamoore]

To have fetched sha1s from bf.git added to trac, a wrapper script will be necessary.

[jmoore]

Simple script put into place which will be called by hudson (alias jenkins). If anything goes wrong, the BIOFORMATS-sync build will start failing. Otherwise, each run of git-fetch.sh (caused by a POST to the BIOFORMATS-sync job from a post-receive hook on the loci git) will invoke /hudson/bioformats.git/hooks/post-receive hook to make this copy act like it were being pushed to directly.

Script:

hudson@necromancer ~/bioformats.git $ cat git-fetch.sh 
# Script ended to fetch from a remote repository
# into a bare repository and perform some action
# for all the named updated branches

set -e

# CONFIGURATION

action() {
  cat - | hooks/post-receive
}


for branch in master 4_2 4_1; do

  BEFORE=`git rev-list -n 1 $branch`

  if test -z "$VERBOSE"; then
    FETCH_MESSAGE=`git fetch origin +$branch:$branch 2>&1`
  else
    git fetch origin +$branch:$branch
  fi

  AFTER=`git rev-list -n 1 $branch`
  if [ "$BEFORE" != "$AFTER" ]; then
    echo $BEFORE $AFTER refs/heads/$branch | action
  fi

done

This does not handle pushes which reset the branch, but that is unlikely for the primary develop branches. We will need to add the dev branches when they are added.

[jmoore]

Note: to make this work, I disabled the check for status in (Ticket.ACCEPTED, Ticket.ASSIGNED) in omero_svn_hooks.py because otherwise the fetch may fail, preventing a build just because the ticket was not properly marked. (This check was a bit annoying anyway).