Use Git metadata to assemble source distributions

.gitattributes

@@ -0,0 +1 @@
+.git* export-ignore

Makefile

@@ -1,17 +1,16 @@
-RELEASE ?= $(shell cat RELEASE)
-
-SOURCES = LICENCE \
- Makefile \
- README.md \
- RELEASE \
- $(shell find etc -type f) \
- $(shell find etc/tingle/hooks -type f | \
- perl -nle 'use File::Basename; print dirname $$_ if -f $$_;' | \
- sort | uniq -c | awk '{ if ($$1 == "1") print $$2; }') \
- $(shell find lib -type f) \
- $(shell find ronn -type f) \
- $(shell find sbin -type f) \
- $(shell find share -type f)
+VERSION := $(shell \
+ git describe --dirty --tags --long --match 'v*' 2>/dev/null \
+ | awk -F '-' -v OFS='-' '\
+ { \
+ sub(/^v/, "", $$1); \
+ if ($$NF == "dirty") { \
+ print $$0 \
+ } else { \
+ print $$1 \
+ } \
+ }; \
+ END { if (NR == 0) { exit 1 } }' \
+ || echo '0-unknown')
 
 
 all: doc
@@ -20,28 +19,19 @@ all: doc
 
 
 clean:
- rm -f dist/tingle-$(RELEASE).tar.gz
+ rm -f dist/tingle-*.tar.gz
 
 .PHONY: clean
 
 
-dist: dist/tingle-$(RELEASE).tar.gz
+dist:
+ mkdir -p 'dist'
+ git archive --worktree-attributes --prefix='tingle-$(VERSION)/' \
+ --output='dist/tingle-$(VERSION).tar.gz' HEAD
 
 .PHONY: dist
 
 
-dist/tingle-$(RELEASE).tar.gz: $(SOURCES)
- @if tar --help | tail -n 1 | grep -q bsdtar ; then \
- tar --exclude '.*.swp' --exclude '.gitignore' \
- -cz -f $@ -s ',^,tingle-$(RELEASE)/,' $(SOURCES) ; \
- else \
- tar --exclude '.*.swp' --exclude '.gitignore' \
- -cz -f $@ --transform 's,^,tingle-$(RELEASE)/,' $(SOURCES) ; \
- fi
-
-.PHONY: dist/tingle-$(RELEASE).tar.gz
-
-
 install: doc
  install -d $(DESTDIR)/etc/tingle
  install -d $(DESTDIR)/etc/tingle/hooks