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

hg init test
cd test

echo '[web]' > .hg/hgrc
echo 'accesslog = access.log' >> .hg/hgrc

echo % Without -v
hg serve -a localhost -p 20063 -d --pid-file=hg.pid
cat hg.pid >> "$DAEMON_PIDS"
if [ -f access.log ]; then
    echo 'access log created - .hg/hgrc respected'
fi

echo % With -v
hg serve -a localhost -p 20064 -d --pid-file=hg.pid -v
cat hg.pid >> "$DAEMON_PIDS"