From: Stefan Bund <stefan@j32.de>
Date: Mon, 9 Nov 2009 12:09:01 +0000 (+0100)
Subject: More efficient changelog generation
X-Git-Url: http://g0dil.de/git?p=mapsector.git;a=commitdiff_plain;h=0f90819bccc5937ea3636b5245db7643322d6e64

More efficient changelog generation
---

diff --git a/Makefile b/Makefile
index a66e17c..e004e09 100644
--- a/Makefile
+++ b/Makefile
@@ -1,55 +1,71 @@
 
 lib/00_version.sh:
-	echo "version='`git describe --tag`'" >"`dirname "$0"`"/lib/00_version.sh
+	echo "version='`git describe --tag`'" >$@
 .PHONY: lib/00_version.sh
 
-mapsectorsh: mapsector lib/[0-9][0-9]_*.sh
+# The $(wildcard ...) return value is sorted and duplicates are
+# removed from the list of dependencies. I need to mention
+# lib/00_version.sh explicitly since it might not yet exist
+mapsectorsh: mapsector lib/00_version.sh $(wildcard lib/[0-9][0-9]_*.sh)
 	@echo "generating $@"
 	@(							\
-	sed -n -e '1p' $<;					\
-	echo "#";						\
-	echo "# $@ automatically generated from";		\
-	for script in $^; do					\
+	    sed -n -e '1p' $<;					\
+	    echo "#";						\
+	    echo "# $@ automatically generated from";		\
+	    for script in $^; do				\
 		echo "#         $$script";			\
-	done;							\
-	sed -n -e '2,/^load$$/p' $<;				\
-	for script in `ls lib/[0-9][0-9]_*.sh | sort`; do	\
+	    done;						\
+	    sed -n -e '2,/^load$$/p' $<;			\
+	    for script in $^; do				\
+		if [ "$$script" == "$<" ]; then continue; fi;	\
 		echo "#### $$script";				\
 		echo;						\
 		cat $$script;					\
 		echo;						\
-	done;							\
-	sed -n -e '/^load$$/,$$p' $<;				\
+	    done;						\
+	    sed -n -e '/^load$$/,$$p' $<;			\
 	) >$@
-	@sed -i -e 's/^load$$/###########################################################################/' $@
+	@sed -i -e 's/^load$$/####/' -eT -eh -eG -eH -eG -eH -eG -e'y/\n/#/' $@
 	@chmod ugo+rx $@
 
-debian/changelog:
-	@echo "generating debian/changelog"
-	@(											  \
-	lasttag="HEAD";										  \
-	(git tag -l 'v*'; echo) | while read tag; do						  \
-		case "$$lasttag" in								  \
-		HEAD) version="`git describe --tag --match='v*' | sed -e 's/-/~/' -e 's/-/./g'`"; \
-	              release="UNRELEASED" ;;							  \
-		v*)   version="$${lasttag#v}";							  \
-	              release="unstable" ;;							  \
-		esac;										  \
-		echo "mapsector ($$version) $$release; urgency=low";				  \
-		echo;										  \
-		git log --pretty=oneline --abbrev-commit $$tag$${tag:+..}$$lasttag		  \
-			| while read commit description; do					  \
-			echo "  * [$$commit] $$description";					  \
-		done;										  \
-		echo;										  \
-		date="`git log --format='%cD' $$lasttag'^!'`";					  \
-		author="`git log --format='%an <%ae>' $$lasttag'^!'`";				  \
-		echo " -- $$author  $$date";							  \
-		echo;										  \
-		lasttag="$$tag" ;								  \
-	done;											  \
-	) >debian/changelog
-.PHONY: debian/changelog
+NAME       := mapsector
+CLOGDIR    := .git/changelogs
+CHANGELOGS := $(shell lasttag=HEAD;								\
+                      (git tag -l 'v*'; echo)							\
+                          | while read tag; do							\
+			      echo $(CLOGDIR)/$${tag}$${tag:+-}$$lasttag; 	\
+                              lasttag=$$tag;							\
+                          done)
+
+$(CHANGELOGS): %:
+	@echo "generating $@"
+	@mkdir -p "$(CLOGDIR)"
+	@(											\
+            version="$@"; version="$${version#$(CLOGDIR)/}";					\
+	    from="$${version%-*}"; version="$${version#*-}"; to="$$version";			\
+	    if [ "$$from" == "$$to" ]; then from=""; fi;					\
+            case "$$version" in									\
+            HEAD) version="`git describe --tag --match='v*' | sed -e 's/-/~/' -e 's/-/./g'`";	\
+                  release="UNRELEASED" ;;							\
+            v*)   version="$${version#v}";							\
+                  release="unstable" ;;								\
+	    esac;										\
+	    echo "$(NAME) ($$version) $$release; urgency=low";					\
+	    echo;										\
+	    git log --pretty=oneline --abbrev-commit $$from$${from:+..}$$to			\
+	        | while read commit description; do						\
+	            echo "  * [$$commit] $$description";					\
+	    done;										\
+	    echo;										\
+	    date="`git log --format='%cD' $$to'^!'`";						\
+	    author="`git log --format='%an <%ae>' $$to'^!'`";					\
+	    echo " -- $$author  $$date";							\
+	    echo;										\
+	) >$@
+.PHONY: $(word 1,$(CHANGELOGS))
+
+debian/changelog: $(CHANGELOGS)
+	cat $^ > $@
 
 prepare: lib/00_version.sh debian/changelog
 .PHONY: prepare
@@ -58,4 +74,5 @@ clean:
 	rm -f mapsectorsh
 	rm -f debian/changelog
 	rm -f lib/00_version.sh
+	rm -rf .git/changelogs
 .PHONY: clean