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

cat > $HGRCPATH <<EOF
[extensions]
alias=

[alias]
myinit = init
cleanstatus = status -c
unknown = bargle
ambiguous = s
recursive = recursive
EOF

echo '% basic'
hg myinit alias

echo '% unknown'
hg unknown

echo '% ambiguous'
hg ambiguous

echo '% recursive'
hg recursive

cd alias
echo foo > foo
hg ci -Amfoo

echo '% with opts'
hg cleanst