ui: make readsections() abort when configuration cannot be read.
#!/bin/sh
cat <<EOF >> $HGRCPATH
[extensions]
notify=
[hooks]
incoming.notify = python:hgext.notify.hook
[notify]
sources = pull
diffstat = False
[usersubs]
foo@bar = *
[reposubs]
* = baz
EOF
hg help notify
hg init a
echo a > a/a
echo % commit
hg --traceback --cwd a commit -Ama -d '0 0'
echo % clone
hg --traceback clone a b
echo a >> a/a
echo % commit
hg --traceback --cwd a commit -Amb -d '1 0'
echo '% pull (minimal config)'
hg --traceback --cwd b pull ../a 2>&1 | sed -e 's/\(Message-Id:\).*/\1/' \
-e 's/changeset \([0-9a-f]* *\)in .*test-notif/changeset \1in test-notif/' \
-e 's/^details: .*test-notify/details: test-notify/' \
-e 's/^Date:.*/Date:/'
cat <<EOF >> $HGRCPATH
[notify]
config = $HGTMP/.notify.conf
domain = test.com
strip = 3
template = Subject: {desc|firstline|strip}\nFrom: {author}\n\nchangeset {node|short} in {webroot}\ndescription:\n\t{desc|tabindent|strip}
[web]
baseurl = http://test/
EOF
echo % fail for config file is missing
hg --cwd b rollback
hg --cwd b pull ../a 2>&1 | grep 'unable to open.*\.notify\.conf' > /dev/null && echo pull failed
touch "$HGTMP/.notify.conf"
echo % pull
hg --cwd b rollback
hg --traceback --cwd b pull ../a 2>&1 | sed -e 's/\(Message-Id:\).*/\1/' \
-e 's/changeset \([0-9a-f]*\) in .*/changeset \1/' \
-e 's/^Date:.*/Date:/'