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DIRDEPS_BUILD: Install new Makefile.depend files atomically.

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Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
Bryan Drewery 2015-12-04 03:17:07 +00:00
parent bd1944cacc
commit 249f51a492
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=291732
1 changed files with 16 additions and 2 deletions
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18
share/mk/install-new.mk
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@ -32,9 +32,23 @@ CmpCp= CmpCp() { \
cp $$src $$target; \
fi; }
# Replace the file if they are different and make a backup if desired
CmpReplace= CmpReplace() { \
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; \
cp -f $$target $$target$$_bak; \
fi; \
fi; \
mv -f $$src $$target; \
fi; }
# If the .new file is different, we want it.
# Note: this function will work as is for *.new$RANDOM"
InstallNew= ${CmpCp}; InstallNew() { \
InstallNew= ${CmpReplace}; InstallNew() { \
_t=-e; _bak=; \
while :; do \
case "$$1" in \
@ -46,7 +60,7 @@ InstallNew= ${CmpCp}; InstallNew() { \
for new in "$$@"; do \
if test $$_t $$new; then \
target=`expr $$new : '\(.*\).new'`; \
CmpCp $$new $$target $$_bak; \
CmpReplace $$new $$target $$_bak; \
fi; \
rm -f $$new; \
done; :; }