cairo/build/Makefile.am.changelog

   1 # Creating ChangeLog files from git log:
   2
   3 # We always create a ChangeLog that contains the most recent changes, and
   4 # multiple others for changes between major releases (other than the last such
   5 # segment that we put in 'ChangeLog'.  The old ones are named
   6 # ChangeLog.pre-X.Y where X.Y is the version number of the major release.
   7
   8 CURR_CHANGELOG_VERSION=$(CAIRO_VERSION_MAJOR).$$(echo "($(CAIRO_VERSION_MINOR)+1)/2*2" | bc)
   9 # examines $version
  10 PREV_CHANGELOG_VERSION=$$(if test "x$$(echo "($$version-0.1)*2/2"|bc)" = "x$$(echo "$$version*2/2"|bc)"; \
  11                           then echo "$$version-$$(echo "$$version" | sed 's/[0-9]/0/g;s/[0-9]$$/2/')"; \
  12                           else echo "$$version-1.0"; \
  13                           fi | bc | sed 's/[.]0*/./;s/^0[.]\?$$/initial/;s/[.]$$/.0/')
  14
  15 CHANGELOGS = ChangeLog \
  16         `version=$(CURR_CHANGELOG_VERSION); \
  17         version=$(PREV_CHANGELOG_VERSION); \
  18         while test "x$$version" != xinitial; do \
  19                 echo ChangeLog.pre-$$version; \
  20                 version=$(PREV_CHANGELOG_VERSION); \
  21         done`
  22
  23 MAINTAINERCLEANFILES += $(srcdir)/ChangeLog $(srcdir)/ChangeLog.pre-*
  24 DISTCLEANFILES += $(srcdir)/ChangeLog.cache-*
  25
  26 changelogs:
  27         @$(MAKE) $(AM_MAKEFLAGS) $(CHANGELOGS)
  28
  29 dist-hook: changelogs
  30         changelogs="$(CHANGELOGS)"; \
  31         for changelog in $$changelogs; do \
  32                 cp $(srcdir)/$$changelog $(distdir)/ 2>/dev/null || \
  33                 cp $$changelog $(distdir)/; \
  34         done
  35
  36 $(srcdir)/ChangeLog:
  37         @if test -d "$(srcdir)/.git"; then \
  38                 version=$(CURR_CHANGELOG_VERSION); \
  39                 prev=$(PREV_CHANGELOG_VERSION).0; \
  40                 nearest_tag=`git-describe | sed 's/-.*//'`; \
  41                 before=$(srcdir)/ChangeLog.cache-$$prev..$$nearest_tag; \
  42                 after=$(srcdir)/ChangeLog.cache-$$nearest_tag..; \
  43                 $(MAKE) $(AM_MAKEFLAGS) $$before $$after && \
  44                 echo Creating $@ && \
  45                 { echo '# Generated by configure.  Do not edit.'; echo; \
  46                   cat $$after; echo; cat $$before; } > $@; \
  47         else \
  48                 test -f $@ || \
  49                 (echo A git checkout is required to generate $@ >&2 && \
  50                  echo A git checkout is required to generate this file >> $@); \
  51         fi
  52
  53 DISTCLEANFILES += ChangeLog.cache-*
  54
  55 ChangeLog.cache-*..: .git
  56
  57 ChangeLog%: $(srcdir)/ChangeLog%
  58
  59 $(srcdir)/ChangeLog.cache-% $(srcdir)/ChangeLog.pre-%:
  60         @echo Creating $@
  61         @if test -d "$(srcdir)/.git"; then \
  62           (cd "$(srcdir)" && \
  63           version=$$(echo "$@" | sed 's/.*ChangeLog\([.].*-\)\?//'); \
  64           if echo "$@" | grep -q '^ChangeLog[.]cache'; then \
  65                 spec=$$version; \
  66           else \
  67                 to=$$version; \
  68                 test "x$$version" = x && version=$(CURR_CHANGELOG_VERSION); \
  69                 from=$(PREV_CHANGELOG_VERSION); \
  70                 test "x$$to" = x || to=$$to.0; \
  71                 test "x$$from" = xinitial || from=$$from.0; \
  72                 spec=$$from..$$to; \
  73           fi; \
  74           $(srcdir)/build/missing --run git-log --stat "$$spec") > $@.tmp \
  75           && mv -f $@.tmp $@ \
  76           || ($(RM) $@.tmp; \
  77               echo Failed to generate $@, your $@ may be outdated >&2); \
  78         else \
  79           echo A git checkout is required to generate $@ >&2; \
  80         fi
  81
  82 .PHONY: changelogs ChangeLog $(srcdir)/ChangeLog