From 089c60a05e95bee1ab3c506069f8e0e75eb43657 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <LukeShu@sbcglobal.net>
Date: Thu, 20 Mar 2014 16:27:41 -0400
Subject: Generalize the patching mechanism in the build system.

---
 common.mk | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

(limited to 'common.mk')

diff --git a/common.mk b/common.mk
index deb64c7..ea0c588 100644
--- a/common.mk
+++ b/common.mk
@@ -10,6 +10,13 @@ pkglibexecdir ?= $(libexecdir)/libretools
 # This is used when using sources grabbed from devtools
 edit = sed -e 's|m4_include(lib/\(.*\))|. $$(librelib \1)|'
 
+# Usage: $(call indent,FILENAME)
+# Command to auto-indent a file.
+indent = emacs --batch $1 \
+	--eval '(setq sh-basic-offset 8)' \
+	--eval '(indent-region (point-min) (point-max) nil)' \
+	-f save-buffer &>/dev/null
+
 # Usage <INPUT $(pofmt) >OUTPUT
 # Normalize a .po(t) file
 pofmt = msguniq -Fi
@@ -53,7 +60,7 @@ install_files += $(addprefix $(DESTDIR)$(bindir)/,$(progs)) \
                  $(addprefix $(DESTDIR)$(mandir)/man6/,$(filter %.6,$(mans))) \
                  $(addprefix $(DESTDIR)$(mandir)/man7/,$(filter %.7,$(mans))) \
                  $(addprefix $(DESTDIR)$(mandir)/man8/,$(filter %.8,$(mans)))
-clean_files += $(patsubst %.in,%,$(copy_files)) $(copy_files) $(mans) $(wildcard *.pot)
+clean_files += $(patsubst %.in,%,$(copy_files)) $(copy_files) $(mans) $(wildcard *.pot *.ugly* *~)
 
 pots  += $(filter-out $(no-pots) ,$(progs))
 pot_files += $(addsuffix .pot,$(pots))
@@ -79,10 +86,23 @@ build: PHONY $(build_files)
 	ronn --roff $(RONNFLAGS) < '$<' > '$@'
 %.html: %.ronn
 	ronn --html $(RONNFLAGS) < '$<' > '$@'
+
+
+# If we have a .patch file, the flow is:
+#     $(devtoolsdir)/%.in -> %.in + %.patch -> %.ugly -> %
+_do_patch = $(filter $(patsubst %.patch,%,$(wildcard *.patch)),$(patsubst %.in,%,$(copy_files)))
+%.ugly: %.in %.patch Makefile
+	cp $*.in $@
+	@echo 'PATCH $@ $*.patch'; patch $@ $*.patch
+$(_do_patch): %: %.ugly Makefile
+	@echo 'EDIT < $< > $@'; $(edit) <'$<' >'$@'
+	@echo 'INDENT $@'; $(call indent,$@)
+	$(if $(filter-out %.sh,$@),chmod 755 "$@")
+# Otherwise, the flow is just
+#     $(devtoolsdir)/%.in -> %.in -> %
 %: %.in
-	@echo "GEN $@"
-	@$(edit) <"$<" >"$@"
-	@chmod 755 "$@"
+	@echo 'EDIT < $< > $@'; $(edit) <"$<" >"$@"
+	$(if $(filter-out %.sh,$@),chmod 755 "$@")
 
 # Build ########################################################################
 
-- 
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