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# Creating ChangeLog files from git log:
# We always create a ChangeLog that contains the most recent changes, and
# multiple others for changes between major releases (other than the last such
# segment that we put in 'ChangeLog'. The old ones are named
# ChangeLog.pre-X.Y where X.Y is the version number of the major release.
CURR_CHANGELOG_VERSION=$(CAIRO_VERSION_MAJOR).$$(echo "($(CAIRO_VERSION_MINOR)+1)/2*2" | bc)
# examines $version
PREV_CHANGELOG_VERSION=$$(if test "x$$(echo "($$version-0.1)*2/2"|bc)" = "x$$(echo "$$version*2/2"|bc)"; \
then echo "$$version-$$(echo "$$version" | sed 's/[0-9]/0/g;s/[0-9]$$/2/')"; \
else echo "$$version-1.0"; \
fi | bc | sed 's/[.]0*/./;s/^0[.]\?$$/initial/;s/[.]$$/.0/')
CHANGELOGS = ChangeLog \
`version=$(CURR_CHANGELOG_VERSION); \
version=$(PREV_CHANGELOG_VERSION); \
while test "x$$version" != xinitial; do \
echo ChangeLog.pre-$$version; \
version=$(PREV_CHANGELOG_VERSION); \
done`
MAINTAINERCLEANFILES += $(srcdir)/ChangeLog $(srcdir)/ChangeLog.pre-*
DISTCLEANFILES += $(srcdir)/ChangeLog.cache-*
changelogs:
@$(MAKE) $(AM_MAKEFLAGS) $(CHANGELOGS)
dist-hook: changelogs
changelogs="$(CHANGELOGS)"; \
for changelog in $$changelogs; do \
cp $(srcdir)/$$changelog $(distdir)/ 2>/dev/null || \
cp $$changelog $(distdir)/; \
done
$(srcdir)/ChangeLog:
@if test -d "$(srcdir)/.git"; then \
version=$(CURR_CHANGELOG_VERSION); \
prev=$(PREV_CHANGELOG_VERSION).0; \
nearest_tag=`git-describe | sed 's/-.*//'`; \
before=$(srcdir)/ChangeLog.cache-$$prev..$$nearest_tag; \
after=$(srcdir)/ChangeLog.cache-$$nearest_tag..; \
$(MAKE) $(AM_MAKEFLAGS) $$before $$after && \
echo Creating $@ && \
{ cat $$after; echo; cat $$before; } > $@; \
else \
test -f $@ || \
(echo A git checkout is required to generate $@ >&2 && \
echo A git checkout is required to generate this file >> $@); \
fi
DISTCLEANFILES += ChangeLog.cache-*
ChangeLog.cache-*..: .git/HEAD
ChangeLog%: $(srcdir)/ChangeLog%
$(srcdir)/ChangeLog.cache-% $(srcdir)/ChangeLog.pre-%:
@echo Creating $@
@if test -d "$(srcdir)/.git"; then \
(cd "$(srcdir)" && \
version=$$(echo "$@" | sed 's/.*ChangeLog\([.].*-\)\?//'); \
if echo "$@" | grep -q '^ChangeLog[.]cache'; then \
spec=$$version; \
else \
to=$$version; \
test "x$$version" = x && version=$(CURR_CHANGELOG_VERSION); \
from=$(PREV_CHANGELOG_VERSION); \
test "x$$to" = x || to=$$to.0; \
test "x$$from" = xinitial || from=$$from.0; \
spec=$$from..$$to; \
fi; \
./missing --run git-log --stat "$$spec") > $@.tmp \
&& mv -f $@.tmp $@ \
|| ($(RM) $@.tmp; \
echo Failed to generate $@, your $@ may be outdated >&2); \
else \
echo A git checkout is required to generate $@ >&2; \
fi
.PHONY: changelogs ChangeLog $(srcdir)/ChangeLog
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