#!/bin/bash
libyaml=../../libyaml
source="$libyaml/src"
include="$libyaml/include"
need_branch=perl-yaml-xs
if [ ! -d "$source" ]; then
echo "'$source' does not exist"
exit 1
fi
libyaml_branch="$(
cd "$libyaml"
git rev-parse --abbrev-ref HEAD
)"
if [ "$libyaml_branch" != "$need_branch" ]; then
echo "libyaml must be set to branch '$need_branch'"
exit 1
fi
diff="$(
diff -q $source . |
grep -v '^Only'
diff -q $include . |
grep -v '^Only'
)"
if [ -n "$diff" ]; then
echo "*** Updating from libyaml repository ***"
diff -q "$source" . | grep -v '^Only'
cp "$source"/*.{c,h} .
diff -q "$include" . | grep -v '^Only'
cp "$include"/*.h .
fi