Generate ChangeLog from git at packaging time.

[slotifier.git] / Makefile.am

diff --git a/Makefile.am b/Makefile.am
index 963a5fbadd482a5fce3cbc5f5aada62d421bf344..35666c6ecf5473beb5dda7e031235f03547c7236 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-# Copyright © 2018 Nick Bowler
+# Copyright © 2018, 2021 Nick Bowler
 #
 # License WTFPL2: Do What The Fuck You Want To Public License, version 2.
 # This is free software: you are free to do what the fuck you want to.
@@ -26,6 +26,49 @@ $(slotifier_OBJECTS): $(gnulib_headers)
 
 dist_man_MANS = doc/slotifier.1
 
+# When running "make dist" in a VPATH build with a read-only srcdir, Automake
+# will produce a distribution with all files read-only.  Moreover, the files
+# are read-only in distdir when the dist hooks are run.  This hook will
+# manually fix up the permissions.  All dist hooks that modify files in distdir
+# should list unfuck-distdir as a prerequisite.
+dist-hook: unfuck-distdir
+unfuck-distdir:
+       find '$(distdir)' -type f -exec chmod u+w {} +
+.PHONY: unfuck-distdir
+
+GITLOG_FLAGS = --format='%s%n%n%b%n'
+
+dist-hook: generate-changelog
+generate-changelog: unfuck-distdir
+       -: "$${GIT_DIR=$(top_srcdir)/.git}"; \
+         export GIT_DIR; test -d "$$GIT_DIR" || exit 0; \
+         $(top_srcdir)/gitlog-to-changelog $(GITLOG_FLAGS) \
+           >'$(distdir)/ChangeLog.gen' && \
+         mv -f '$(distdir)/ChangeLog.gen' '$(distdir)/ChangeLog'
+       rm -f '$(distdir)/ChangeLog.gen'
+.PHONY: generate-changelog
+
+GENERIC_V   = $(GENERIC_V_@AM_V@)
+GENERIC_V_  = $(GENERIC_V_@AM_DEFAULT_V@)
+GENERIC_V_0 = @printf '%2.0s%$(DX_ALIGN_V)s %s\n'
+
+TEST_DISTRIBUTION = false
+TEST_DISTRIBUTION_OR_ERROR = if $(TEST_DISTRIBUTION); \
+  then echo 'Proceeding anyway...'; \
+  else echo 'Run $(MAKE) TEST_DISTRIBUTION=true to ignore this failure.'; \
+       false; \
+  fi
+
+distcheck-hook:
+       $(GENERIC_V) : 'CHECK   ' ChangeLog; \
+         $(AWK) '/^Stub/ { print FILENAME ":" NR ":", $$0; exit 1 }' \
+           $(distdir)/ChangeLog || { \
+             echo 'ERROR: *** Packaged ChangeLog was not properly generated from git log.'; \
+             echo '       *** The source version was used instead, but this appears to'; \
+             echo '       *** be the stub from a git checkout.  The "git" and "perl"'; \
+             echo '       *** programs are required for ChangeLog generation to work.'; \
+             $(TEST_DISTRIBUTION_OR_ERROR); } >&2
+
 # Supporting rules for gettext.
 include $(top_srcdir)/common/snippet/gettext.mk
 noinst_DATA = $(MOFILES)