From 7e9392d1b724df00869c018b3ed9aabc6d2dc5a4 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Wed, 13 Feb 2013 17:05:31 +0100
Subject: [PATCH] make version check smarter: only compare to tags having the
 same non-digit prefix

---
 mass_build.py |  2 +-
 vcs.py        | 20 +++++++++++---------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/mass_build.py b/mass_build.py
index 0060da2..1732565 100755
--- a/mass_build.py
+++ b/mass_build.py
@@ -28,7 +28,7 @@ class Project:
 		# VCS
 		vcsName = config['vcs']
 		if vcsName == 'git':
-			self.vcs = vcs.Git(self.sourceFolder(), config['url'], config['version'])
+			self.vcs = vcs.Git(self.sourceFolder(), config)
 		elif vcsName == 'svn':
 			self.vcs = vcs.SVN(self.sourceFolder(), config['url'])
 		else:
diff --git a/vcs.py b/vcs.py
index 3e04f46..d6e2028 100644
--- a/vcs.py
+++ b/vcs.py
@@ -27,13 +27,15 @@ MODE_RESET = 2
 def natural_sort_key(val):
 	return [ (int(c) if c.isdigit() else c) for c in re.split('([0-9]+)', val) ]
 
+def get_non_digit_prefix(val):
+	return re.match('[^0-9]*', val).group(0)
+
 # Fetch updates from git
 class Git:
-	
-	def __init__(self, folder, url, commit):
+	def __init__(self, folder, config):
 		self.folder = os.path.abspath(folder)
-		self.url = url
-		self.commit = commit
+		self.url = config['url']
+		self.commit = config['version']
 
 	class _ProgressPrinter(git.remote.RemoteProgress):
 		def update(self, op_code, cur_count, max_count=None, message=''):
@@ -84,21 +86,21 @@ class Git:
 	def version(self):
 		repo = git.Repo(self.folder)
 		v = repo.git.describe()
-		if v.startswith('v'): v = v[1:]
-		return v
+		return v[len(get_non_digit_prefix(v)):] # remove the letter prefix from v (so that it starts with a number)
 
 	def checkVersions(self):
+		self.update(mode =  MODE_FETCH)
 		repo = git.Repo(self.folder)
-		# get tag for current commit, if any
+		# get tag name for current commit, if any
 		commit = repo.commit(self.commit)
 		commitTag = filter(lambda t: t.commit == commit, repo.tags)
 		if not commitTag:
 			print "Version is not a tag"
 			return
 		currentVersion = str(commitTag[0])
-		# get sorted list of tag names
+		# get sorted list of tag names with the same letter prefix and higher version number
 		tags = map(str, repo.tags)
-		tags = filter(lambda t: natural_sort_key(t) > natural_sort_key(currentVersion), tags)
+		tags = filter(lambda t: get_non_digit_prefix(t) == get_non_digit_prefix(currentVersion) and natural_sort_key(t) > natural_sort_key(currentVersion), tags)
 		if not tags: return
 		tags.sort(key = natural_sort_key)
 		print "Versions newer than "+self.commit+" available:"
-- 
2.30.2