diff options
| author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-05-29 16:05:16 -0400 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-05-29 16:05:16 -0400 |
| commit | d98870ac5acfe42d410383dfe7f2af18923510c4 (patch) | |
| tree | ed3ec2b94aeb2a3b925b07364af1da2263101c97 | |
work on thingsv2/mod-write-ifchanged
| -rw-r--r-- | build-aux/Makefile.once.head/00-write-ifchanged.mk | 1 | ||||
| -rwxr-xr-x | build-aux/write-ifchanged | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/build-aux/Makefile.once.head/00-write-ifchanged.mk b/build-aux/Makefile.once.head/00-write-ifchanged.mk new file mode 100644 index 0000000..79ef1c4 --- /dev/null +++ b/build-aux/Makefile.once.head/00-write-ifchanged.mk @@ -0,0 +1 @@ +WRITE_IFCHANGED = $(topsrcdir)/build-aux/write-ifchanged diff --git a/build-aux/write-ifchanged b/build-aux/write-ifchanged new file mode 100755 index 0000000..185ceb0 --- /dev/null +++ b/build-aux/write-ifchanged @@ -0,0 +1,25 @@ +#!/usr/bin/env bash +# 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/>. + +outfile=$1 +tmpfile="$(dirname "$outfile")/.tmp${outfile##*/}" + +cat > "$tmpfile" || exit $? +if cmp -s "$tmpfile" "$outfile"; then + rm -f "$tmpfile" || : +else + mv -f "$tmpfile" "$outfile" +fi |