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|
#!/bin/sh
set -e
usage()
{
cat <<EOF
Usage:
$0 [git-push options...] <destination> [refspec]
$0 <--all|--mirror|--tags> [git-push options...] <destination>
EOF
}
die() { printf "Error: %s\n" "$*" >&2; exit 1; }
loudly() { (set -x; "$@"); }
quietly() { "$@" >/dev/null 2>&1; }
bad_usage()
{
usage >&2
exit 1
}
check_existence()
{
(set +e;
quietly rsync "$rsync_dest"
case $? in
23) return 0;;
0) [ "$NO_ACT" ] || die "Destination already exists: '$rsync_dest'";;
*) die "rsync returned $? when checking for destination existence.";;
esac) || exit
}
git_init_push_checkout()
{
TEMP_DIR=$(mktemp -d)
trap 'rm -rf "$TEMP_DIR"' EXIT
git init --bare "$TEMP_DIR"/.git
loudly git push "$TEMP_DIR" "$@"
if [ "$CHECKOUT_BRANCH" -a ! "$BARE" ]; then
(cd "$TEMP_DIR";
git config core.bare false
git checkout "$CHECKOUT_BRANCH")
fi
}
go()
{
check_existence
git_init_push_checkout "$@"
}
# What we want to do is push a branch, and then checkout the branch we just
# pushed. Determining the branch to checkout requires parsing the branch out of
# the git push args in $@
check_source_ref()
{
local src="$1"
git rev-parse --verify --quiet "$src^{commit}" >/dev/null
}
pop=$(cat <<'EOF'
i=$#;
while [ $i -gt 0 ]; do
lastarg=$1;
shift;
i=$((i - 1))
if [ $i -eq 0 ]; then
break;
else
set -- "$@" "$lastarg";
fi
done
EOF
)
parse_target()
{
case "$1" in
ssh://*) rsync_dest=${1#ssh://} ;;
*:*) rsync_dest=$1 ;;
*) die "Unrecognized git URL: '$1'" ;;
esac
target=$1
case "$target" in
*[^/].git) BARE=y ;;
*) BARE= ;;
esac
}
parse_refspec()
{
local refspec="$1"
case "$refspec" in
*:*:*) die "expected <local-ref>:<remote-ref> but got too many colons" ;;
?*:?*)
check_source_ref "${1%:*}" || die "invalid source ref: $src"
CHECKOUT_BRANCH=${1#*:}
;;
*) if check_source_ref "$1"; then CHECKOUT_BRANCH=$1; fi;;
esac
}
current_branch() { git status -bs|sed -ne 's/^## //p'; }
REFSPEC_UNNEEDED=
arg_count=$#
for arg in "$@"; do
case "$arg" in
-h|--help|--usage) usage; exit;;
--all|--mirror|--tags) REFSPEC_UNNEEDED=y;;
--no-act) NO_ACT=y;;
--) arg_count=$((arg_count - 1)); break;;
-*) ;;
*) break;;
esac
arg_count=$((arg_count - 1))
done
case $arg_count in
1)
eval "$pop"
parse_target "$lastarg"
b=$(current_branch)
parse_refspec "$b:$b"
if ! [ "$REFSPEC_UNNEEDED" ]; then
set -- "$@" "$b"
fi
;;
2)
eval "$pop"
refspec=$lastarg
parse_refspec "$refspec"
eval "$pop"
parse_target "$lastarg"
set -- "$@" "$refspec"
;;
*) bad_usage;;
esac
go "$@"
loudly rsync ${NO_ACT:+-n} -zrlp --info=stats1 "$TEMP_DIR"/"${BARE:+.git/}" "$rsync_dest"/
|
