--- a/hgext/extdiff.py
+++ b/hgext/extdiff.py
@@ -58,7 +58,10 @@ def dodiff(ui, repo, diffcmd, diffopts,
'''snapshot files as of some revision'''
changes = repo.changelog.read(node)
mf = repo.manifest.read(changes[0])
- dirname = '%s.%s' % (os.path.basename(repo.root), short(node))
+ dirname = os.path.basename(repo.root)
+ if dirname == "":
+ dirname = "root"
+ dirname = '%s.%s' % (dirname, short(node))
base = os.path.join(tmproot, dirname)
os.mkdir(base)
if not ui.quiet:
@@ -82,6 +85,8 @@ def dodiff(ui, repo, diffcmd, diffopts,
if not using snapshot, -I/-X does not work and recursive diff
in tools like kdiff3 and meld displays too many files.'''
dirname = os.path.basename(repo.root)
+ if dirname == "":
+ dirname = "root"
base = os.path.join(tmproot, dirname)
os.mkdir(base)
if not ui.quiet: