Don't try to determine interactivity if ui() called with interactive=False. WSGI applications are not supposed to refer to sys.stdin. In ed6df6b1c29a, hgweb and hgwebdir were fixed to pass interactive=False to their ui()'s, but sys.stdin.isatty() was still called by the ui objects. This change makes sure only the ui.fixconfig() method will call ui.isatty() (by making the ui._readline() method, which is currently only called from ui.prompt(), private). ui.fixconfig() is changed to let config files override the initial interactivity setting, but not check isatty() if interactive=False was specified in the creation of the ui.

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

hg init a
cd a

echo 'base' > base
hg ci -Ambase -d '1 0'

hg qnew a
hg qnew b
hg qnew c

hg qdel

hg qdel c
hg qpop
hg qdel c
hg qseries
ls .hg/patches
hg qpop
hg qdel -k b
ls .hg/patches
hg qdel -r a
hg qapplied
hg log --template '{rev} {desc}\n'

hg qnew d
hg qnew e
hg qnew f

hg qdel -r e
hg qdel -r qbase:e
hg qapplied
hg log --template '{rev} {desc}\n'