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Diffstat (limited to 'contrib/bmake/mk/install-new.mk')
| -rw-r--r-- | contrib/bmake/mk/install-new.mk | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/contrib/bmake/mk/install-new.mk b/contrib/bmake/mk/install-new.mk new file mode 100644 index 000000000000..d312bdc26d46 --- /dev/null +++ b/contrib/bmake/mk/install-new.mk @@ -0,0 +1,53 @@ +# $Id: install-new.mk,v 1.4 2020/08/19 17:51:53 sjg Exp $ +# +# @(#) Copyright (c) 2009, Simon J. Gerraty +# +# This file is provided in the hope that it will +# be of use. There is absolutely NO WARRANTY. +# Permission to copy, redistribute or otherwise +# use this file is hereby granted provided that +# the above copyright notice and this notice are +# left intact. +# +# Please send copies of changes and bug-fixes to: +# sjg@crufty.net +# + +.if !defined(InstallNew) + +# copy if src and target are different making a backup if desired +CmpCp= CmpCp() { \ + src=$$1 target=$$2 _bak=$$3; \ + if ! test -s $$target || ! cmp -s $$target $$src; then \ + trap "" 1 2 3 15; \ + if test -s $$target; then \ + if test "x$$_bak" != x; then \ + rm -f $$target$$_bak; \ + mv $$target $$target$$_bak; \ + else \ + rm -f $$target; \ + fi; \ + fi; \ + cp $$src $$target; \ + fi; } + +# If the .new file is different, we want it. +# Note: this function will work as is for *.new$RANDOM" +InstallNew= ${CmpCp}; InstallNew() { \ + _t=-e; _bak=; \ + while :; do \ + case "$$1" in \ + -?) _t=$$1; shift;; \ + --bak) _bak=$$2; shift 2;; \ + *) break;; \ + esac; \ + done; \ + for new in "$$@"; do \ + if test $$_t $$new; then \ + target=`expr $$new : '\(.*\).new'`; \ + CmpCp $$new $$target $$_bak; \ + fi; \ + rm -f $$new; \ + done; :; } + +.endif |