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source $stdenv/setup
header "exporting $url (rev $rev) into $out"
git clone "$url" $out
if test -n "$rev"; then
cd $out
# Track all remote branches so that revisions like
# `t/foo@{2010-05-12}' are correctly resolved. Failing to do that,
# Git bails out with an "invalid reference" error.
for branch in $(git branch -rl | grep -v ' origin/master$')
do
git branch --track "$(echo $branch | sed -es,origin/,,g)" "$branch"
done
git checkout "$rev" --
fi
if test -z "$leaveDotGit"; then
find $out -name .git\* | xargs rm -rf
fi
stopNest
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