Diffstat (limited to 'build-aux/write-ifchanged')
1 files changed, 25 insertions, 0 deletions
diff --git a/build-aux/write-ifchanged b/build-aux/write-ifchanged
new file mode 100755
@@ -0,0 +1,25 @@
+# Copyright (C) 2015 Luke Shumaker
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+cat > "$tmpfile" || exit $?
+if cmp -s "$tmpfile" "$outfile"; then
+ rm -f "$tmpfile" || :
+ mv -f "$tmpfile" "$outfile"