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 a
cd a
echo 'root' >root
hg add root
hg commit -d '0 0' -u test -m "Adding root node"
hg heads
echo '-------'
hg heads .
echo '======='
echo 'a' >a
hg add a
hg branch a
hg commit -d '1 0' -u test -m "Adding a branch"
hg heads
echo '-------'
hg heads .
echo '======='
hg update -C 0
echo 'b' >b
hg add b
hg branch b
hg commit -d '2 0' -u test -m "Adding b branch"
hg heads
echo '-------'
hg heads .
echo '======='
echo 'bh1' >bh1
hg add bh1
hg commit -d '3 0' -u test -m "Adding b branch head 1"
hg heads
echo '-------'
hg heads .
echo '======='
hg update -C 2
echo 'bh2' >bh2
hg add bh2
hg commit -d '4 0' -u test -m "Adding b branch head 2"
hg heads
echo '-------'
hg heads .
echo '======='
hg update -C 2
echo 'bh3' >bh3
hg add bh3
hg commit -d '5 0' -u test -m "Adding b branch head 3"
hg heads
echo '-------'
hg heads .
echo '======='
hg merge 4
hg commit -d '6 0' -u test -m "Merging b branch head 2 and b branch head 3"
hg heads
echo '-------'
hg heads .
echo '======='
echo 'c' >c
hg add c
hg branch c
hg commit -d '7 0' -u test -m "Adding c branch"
hg heads
echo '-------'
hg heads .
echo '======='
hg heads -r 3 .
echo $?
echo '-------'
hg heads -r 2 .
echo $?
echo '-------'
hg update -C 4
echo $?
echo '-------'
hg heads -r 3 .
echo $?
echo '-------'
hg heads -r 2 .
echo $?
echo '-------'
hg heads -r 7 .
echo $?
echo '======='
for i in 0 1 2 3 4 5 6 7; do
hg update -C "$i"
hg heads
echo '-------'
hg heads .
echo '-------'
done
echo '======='
for i in a b c z; do
hg heads "$i"
echo '-------'
done
echo '======='
hg heads 0 1 2 3 4 5 6 7