Makefile: automate changelog & release

Changelog is automatically generated in a new file (prechangelog.rst),
to be edited and reviewed before final submission.

The version in ``.vimrc`` is also updated automatically according to the
new version being released.

Once this is done, changes are ready for commit and tag. The message for
these git objects should be the part of the changelog corresponding to
this version.

:smiley:

.gitignore

@@ -38,3 +38,4 @@ nosetests.xml
 # Swap Files
 *.sw[op]
 *~
+prechangelog.rst

Makefile

@@ -19,6 +19,9 @@ TARGET_COLORS := $(COLORS_DIR)/tromso.vim
 
 SOURCE_SYNTAX := $(PWD)/syntax/python.vim
 TARGET_SYNTAX := $(SYNTAX_DIR)/python.vim
+PRECHANGELOG = prechangelog.rst
+YELLOW := \e[93m
+RED := \e[91m
 
 all: install
 
@@ -75,14 +78,26 @@ install: dirs
 	@wget -O $(TARGET_COLORS) $(REMOTELOC)/colors/tromso.vim
 	@wget -O $(TARGET_SYNTAX) $(REMOTELOC)/syntax/python.vim
 
+# make changelog TAG=<tag>
 .PHONY: changelog
 changelog:
-	@git log --no-merges master.. --oneline --pretty=format:"   * %s"
+	@echo "Change Log" >> $(PRECHANGELOG)
+	@echo -e "==========\n" >> $(PRECHANGELOG)
+	@echo "$(TAG) ($(shell date --rfc-3339=date))" >> $(PRECHANGELOG)
+	@echo "-----------------" >> $(PRECHANGELOG)
+	@git log --no-merges master.. --oneline --pretty=format:"* %s" >> $(PRECHANGELOG)
+	@echo -ne "\n\n" >> $(PRECHANGELOG)
+	@tail -n +4 changelog.rst >> $(PRECHANGELOG)
+	@sed -i 's/\(" Version:\).*/\1 $(TAG)/g' $(PWD)/.vimrc
+	@echo -e "$(RED)$(PRECHANGELOG) $(YELLOW)created. Adjust & review status before releasing!"
 
 # make release TAG=<tag>
 .PHONY: release
-release:
-	git tag -S $(TAG)
+release: $(PRECHANGELOG)
+	mv {pre,}changelog.rst
+	git add .
+	git commit
+	git tag -s $(TAG)
 
 .PHONY: clean
 clean: