--- a/hgext/blackbox.py	Sun Oct 06 09:45:02 2019 -0400
+++ b/hgext/blackbox.py	Sun Oct 06 09:48:39 2019 -0400
@@ -63,7 +63,7 @@
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
-testedwith = 'ships-with-hg-core'
+testedwith = b'ships-with-hg-core'
 
 cmdtable = {}
 command = registrar.command(cmdtable)
@@ -72,27 +72,27 @@
 configitem = registrar.configitem(configtable)
 
 configitem(
-    'blackbox', 'dirty', default=False,
+    b'blackbox', b'dirty', default=False,
 )
 configitem(
-    'blackbox', 'maxsize', default='1 MB',
+    b'blackbox', b'maxsize', default=b'1 MB',
 )
 configitem(
-    'blackbox', 'logsource', default=False,
+    b'blackbox', b'logsource', default=False,
 )
 configitem(
-    'blackbox', 'maxfiles', default=7,
+    b'blackbox', b'maxfiles', default=7,
 )
 configitem(
-    'blackbox', 'track', default=lambda: ['*'],
+    b'blackbox', b'track', default=lambda: [b'*'],
 )
 configitem(
-    'blackbox',
-    'ignore',
-    default=lambda: ['chgserver', 'cmdserver', 'extension'],
+    b'blackbox',
+    b'ignore',
+    default=lambda: [b'chgserver', b'cmdserver', b'extension'],
 )
 configitem(
-    'blackbox', 'date-format', default='%Y/%m/%d %H:%M:%S',
+    b'blackbox', b'date-format', default=b'%Y/%m/%d %H:%M:%S',
 )
 
 _lastlogger = loggingutil.proxylogger()
@@ -101,10 +101,10 @@
 class blackboxlogger(object):
     def __init__(self, ui, repo):
         self._repo = repo
-        self._trackedevents = set(ui.configlist('blackbox', 'track'))
-        self._ignoredevents = set(ui.configlist('blackbox', 'ignore'))
-        self._maxfiles = ui.configint('blackbox', 'maxfiles')
-        self._maxsize = ui.configbytes('blackbox', 'maxsize')
+        self._trackedevents = set(ui.configlist(b'blackbox', b'track'))
+        self._ignoredevents = set(ui.configlist(b'blackbox', b'ignore'))
+        self._maxfiles = ui.configint(b'blackbox', b'maxfiles')
+        self._maxsize = ui.configbytes(b'blackbox', b'maxsize')
         self._inlog = False
 
     def tracked(self, event):
@@ -125,29 +125,29 @@
             self._inlog = False
 
     def _log(self, ui, event, msg, opts):
-        default = ui.configdate('devel', 'default-date')
-        date = dateutil.datestr(default, ui.config('blackbox', 'date-format'))
+        default = ui.configdate(b'devel', b'default-date')
+        date = dateutil.datestr(default, ui.config(b'blackbox', b'date-format'))
         user = procutil.getuser()
-        pid = '%d' % procutil.getpid()
-        changed = ''
+        pid = b'%d' % procutil.getpid()
+        changed = b''
         ctx = self._repo[None]
         parents = ctx.parents()
-        rev = '+'.join([hex(p.node()) for p in parents])
-        if ui.configbool('blackbox', 'dirty') and ctx.dirty(
+        rev = b'+'.join([hex(p.node()) for p in parents])
+        if ui.configbool(b'blackbox', b'dirty') and ctx.dirty(
             missing=True, merge=False, branch=False
         ):
-            changed = '+'
-        if ui.configbool('blackbox', 'logsource'):
-            src = ' [%s]' % event
+            changed = b'+'
+        if ui.configbool(b'blackbox', b'logsource'):
+            src = b' [%s]' % event
         else:
-            src = ''
+            src = b''
         try:
-            fmt = '%s %s @%s%s (%s)%s> %s'
+            fmt = b'%s %s @%s%s (%s)%s> %s'
             args = (date, user, rev, changed, pid, src, msg)
             with loggingutil.openlogfile(
                 ui,
                 self._repo.vfs,
-                name='blackbox.log',
+                name=b'blackbox.log',
                 maxfiles=self._maxfiles,
                 maxsize=self._maxsize,
             ) as fp:
@@ -156,7 +156,7 @@
             # deactivate this to avoid failed logging again
             self._trackedevents.clear()
             ui.debug(
-                'warning: cannot write to blackbox.log: %s\n'
+                b'warning: cannot write to blackbox.log: %s\n'
                 % encoding.strtolocal(err.strerror)
             )
             return
@@ -184,13 +184,13 @@
     if _lastlogger.logger is None:
         _lastlogger.logger = logger
 
-    repo._wlockfreeprefix.add('blackbox.log')
+    repo._wlockfreeprefix.add(b'blackbox.log')
 
 
 @command(
-    'blackbox',
-    [('l', 'limit', 10, _('the number of events to show')),],
-    _('hg blackbox [OPTION]...'),
+    b'blackbox',
+    [(b'l', b'limit', 10, _(b'the number of events to show')),],
+    _(b'hg blackbox [OPTION]...'),
     helpcategory=command.CATEGORY_MAINTENANCE,
     helpbasic=True,
 )
@@ -198,12 +198,12 @@
     '''view the recent repository events
     '''
 
-    if not repo.vfs.exists('blackbox.log'):
+    if not repo.vfs.exists(b'blackbox.log'):
         return
 
     limit = opts.get(r'limit')
-    fp = repo.vfs('blackbox.log', 'r')
-    lines = fp.read().split('\n')
+    fp = repo.vfs(b'blackbox.log', b'r')
+    lines = fp.read().split(b'\n')
 
     count = 0
     output = []
@@ -216,4 +216,4 @@
             count += 1
         output.append(line)
 
-    ui.status('\n'.join(reversed(output)))
+    ui.status(b'\n'.join(reversed(output)))