Add a heuristic to skip git checkouts not managed by crup

crup-runner.sh

 #!/bin/bash
 
 set_target_os () {
   # Get the os we're building for.  On first run, this will be unset.
   target_os=$(git config target.os 2>/dev/null)
   if [ -z "$target_os" ]; then
     case $(uname -s) in
       Linux) target_os=unix ;;
       Darwin) target_os=mac ;;
       CYGWIN*|MINGW*) target_os=win ;;
@@ skipping 45 matching lines @@
 }
 
 if [ -z "$*" ]; then
   exit 0
 fi
 set -o pipefail
 dir="$1"
 solution="${1%%/*}"
 cd "$solution"
 
+if ! grep -q -s "The Chromium Authors" ".git/description"; then

[szager1, 2013/01/23 17:22:46]

This stanza should go in the 'if' clause below:

if [ "$solution" = "$1" ]; then
  if ! grep -q -s ...

[jochen (gone - plz use gerrit), 2013/01/23 17:55:51]

Done.

+  # Skip git checkouts not managed by crup.
+  exit 0
+fi
+
 if [ "$solution" = "$1" ]; then
   # Don't "pull" if checkout is not on a named branch
   shift
   if test "$2" = "pull" && ( ! git symbolic-ref HEAD >/dev/null 2>/dev/null ); then
     first_args="$1 fetch"
   else
     first_args="$1 $2"
   fi
   shift 2
   $first_args $@ | sed "s/^/[$solution] /g" 1>&2
@@ skipping 12 matching lines @@
   submodule="${1#*/}"
   echo "[$solution] updating $submodule"
   "$GIT_EXE" submodule update --quiet "$submodule" |
   ( grep -v '^Skipping submodule' || true ) | sed "s|^|[$1] |g"
   status=$?
   if [ "$status" -ne "0" ]; then
     echo "[$solution] FAILED to update $submodule"
   fi
 fi
 exit $status