progress: retry ferr.flush() and .write() on EINTR (issue5532)
See the inline comment how this could mitigate the issue.
I couldn't reproduce the exact problem on my Linux machine, but there are
at least two people who got EINTR in progress.py, and it seems file_write()
of Python 2 is fundamentally broken [1]. Let's make something in on 4.2.
[1]: https://hg.python.org/cpython/file/v2.7.13/Objects/fileobject.c#l1850
%include map-cmdline.default
# Override base templates
changeset = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{summary}{lfiles}\n'
changeset_verbose = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{description}{lfiles}\n'
changeset_debug = '{fullcset}{branches}{bookmarks}{tags}{lphase}{parents}{manifest}{user}{ldate}{extras}{description}{lfiles}\n'
# Override the file templates
lfiles = '{if(files,
label('ui.note log.files',
'files:\n'))}{lfile_mods}{lfile_adds}{lfile_dels}'
lfile_adds = '{file_adds % "{lfile_add}{lfile_src}"}'
lfile_mods = '{file_mods % "{lfile_mod}{lfile_src}"}'
lfile_add = '{label("status.added", "A {file}\n")}'
lfile_mod = '{label("status.modified", "M {file}\n")}'
lfile_src = '{ifcontains(file, file_copies_switch,
label("status.copied", " {get(file_copies_switch, file)}\n"))}'
lfile_dels = '{file_dels % "{label('status.removed', 'R {file}\n')}"}'