Dynamic version and Makefile target to generate a distribution

The version is extracted from the last tag name minus the 'release/'
prefix.

* AUTHORS: Add mysel as contributor.

* setup.py: Add a function to get version from extracted version.in file
  or from the last tag name.

* Makefile: Add a target to generate the version.in file from the last
  tag name.

* .gitignore: Ignore the version.in file.

.gitignore

@@ -1,4 +1,5 @@
 *~
 *#
 *.pyc
+version.in
 build/

AUTHORS

@@ -3,4 +3,4 @@ Authors
 
 Gwenaël Rémond <gremond@cadoles.com> lead developer
 Emmanuel Garette <egarette@cadoles.com> contributor
-
+Daniel Dehennin <daniel.dehennin@ac-dijon.fr> contributor

Makefile

@@ -1,5 +1,7 @@
 #!/usr/bin/make
 
+PACKAGE         := tiramisu
+
 INSTALL         := install
 INSTALL_DATA    := install -m 644
 INSTALL_PROGRAM := install -m 755
@@ -10,7 +12,11 @@ ifneq ($(DESTDIR),)
 PYTHON_OPTS     += --root $(DESTDIR)
 endif
 
-all: test
+LAST_TAG        := $(shell git describe --tags --abbrev=0)
+VERSION         := $(shell echo $(LAST_TAG) | awk -F'/' '{print $$2}' || true)
+VERSION_FILE    := version.in
+
+all:
 
 clean:
 	$(RM) -r build
@@ -22,4 +28,15 @@ test: clean
 install:
 	python setup.py install --no-compile $(PYTHON_OPTS)
 
-.PHONY: all clean test install
+# List in .PHONY to force generation at each call
+version.in:
+	@if test -n $(VERSION) ; then \
+		echo $(VERSION) > $(VERSION_FILE) ; \
+	fi
+
+dist: version.in
+	git archive --format=tar --prefix $(PACKAGE)-$(VERSION)/ -o $(PACKAGE)-$(VERSION).tar $(LAST_TAG) \
+	  && tar --xform "s,\(.*\),$(PACKAGE)-$(VERSION)/\1," -f $(PACKAGE)-$(VERSION).tar -r version.in \
+	  && gzip -9 $(PACKAGE)-$(VERSION).tar
+
+.PHONY: all clean test install version.in dist

setup.py

@@ -2,11 +2,35 @@
 # -*- coding: utf-8 -*-
 from distutils.core import setup
 
+import os
+
+def fetch_version():
+    """Get version from version.in or latest git tag"""
+    version_file='version.in'
+    version = "0.0"
+    git_last_tag_cmd = ['git', 'describe', '--tags', '--abbrev=0']
+
+    try:
+        if os.path.isfile(version_file):
+            version=file(version_file).readline().strip()
+        elif os.path.isdir('.git'):
+            popen = subprocess.Popen(git_last_tag_cmd, stdout=subprocess.PIPE)
+            out, ret = popen.communicate()
+            for line in out.split('\n'):
+                if line:
+                    version = line.lstrip('release/')
+                    break
+    except OSError:
+        pass # Failing is fine, we just can't print the version then
+
+    return version
+
+
 setup(
     author='Gwenaël Rémond',
     author_email='gremond@cadoles.com',
     name='tiramisu',
-    version='0.1',
+    version=fetch_version(),
     description='configuration management tool',
     url='http://labs.libre-entreprise.org/projects/tiramisu',
     packages=['tiramisu']