# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 2023-01-30 17:41:59
# Node ID 8d390a13474d34c6fa8c05a1d385cd333be2b075
# Parent  84680c003d449ae4387f8be479a7a6ab3a05eb9b

setup: make the version computation process more resistant

The tag fetching might return and empty string¹, from there everything derails
quickly. As setup tools becomes more picky about version format we make the
whole seems a bit more robust.

The resulting version will be obviously weird, but at least it will actually
install itself.

[1] This is a problem we will address in the next changesets.

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -337,8 +337,12 @@ if os.path.isdir('.hg'):
     else:  # no tag found
         ltagcmd = ['parents', '--template', '{latesttag}']
         ltag = sysstr(hg.run(ltagcmd))
+        if not ltag:
+            ltag = 'null'
         changessincecmd = ['log', '-T', 'x\n', '-r', "only(.,'%s')" % ltag]
         changessince = len(hg.run(changessincecmd).splitlines())
+        if ltag == 'null':
+            ltag = '0.0'
         version = '%s+hg%s.%s' % (ltag, changessince, hgid)
     if version.endswith('+'):
         version = version[:-1] + 'local' + time.strftime('%Y%m%d')