eol: handle LockUnavailable error (issue2569)
If the repository is not locked when clearing the dirstate, then
running test-eol.t in a loop fails sooner or later with:
ERROR: /home/mg/src/mercurial-crew/tests/test-eol.t output changed
--- /home/mg/src/mercurial-crew/tests/test-eol.t
+++ /home/mg/src/mercurial-crew/tests/test-eol.t.err
@@ -343,6 +343,7 @@
% hg status (eol activated)
M win.txt
% hg commit
+ nothing changed
% hg status
$ testmixed CRLF
However, if we cannot lock the repository, then we can also not make a
commit and so we can simply ignore a LockUnavailable error.
$ rm -rf a
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Am0
adding a
$ hg tag t1 # 1
$ hg tag --remove t1 # 2
$ hg co 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg tag -f -r0 t1
$ hg tags
tip 3:a49829c4fc11
t1 0:f7b1eb17ad24