repository: establish API for emitting revision deltas
With our revision delta and revision delta request interfaces
defined, it is now time to define a method on storage interfaces
for using them.
So far, the only storage interface that is well-defined and used
is file storage. So that is the only interface we need to add a
method on.
We define an ``emitrevisiondeltas()`` method that takes an
iterable of ``irevisiondeltarequest``s and turns them into
``irevisiondelta`` instances.
changegroup._handlerevisiondeltarequest() and the looping logic
from changegroup.deltagroup() has effectively been moved to
revlog.emitrevisiondeltas().
Our filelog wrapper class proxies its emitrevisiondeltas() to
the internal revlog instance.
The simple store test extension used to verify sanity of storage
abstractions has also implemented emitrevisiondeltas() for
file storage and the test harness when run with this extension doesn't
seem to exhibit any regressions.
Rather than create a shared type to represent revision deltas,
each storage backend has its own type and the class name identifies
where the revision delta was derived from.
Differential Revision: https://phab.mercurial-scm.org/D4226
#!/bin/bash
# This script gets executed on container start. Its job is to set up
# the Mercurial environment and invoke the server.
# Mercurial can be started in two modes.
# If the MERCURIAL_SOURCE environment variable is set and it points to a
# Mercurial source directory, we will install Mercurial from that directory.
# Otherwise, we download the Mercurial source and install it manually.
set -e
SOURCE_DIR=/var/hg/source
INSTALL_DIR=/var/hg/install
REPOS_DIR=/var/hg/repos
HTDOCS_DIR=/var/hg/htdocs
if [ ! -d ${SOURCE_DIR} ]; then
echo "Mercurial source not available at ${SOURCE_DIR}"
echo "You need to mount a volume containing the Mercurial source code"
echo "when running the container. For example:"
echo ""
echo " $ docker run -v ~/src/hg:/${SOURCE_DIR} hg-apache"
echo ""
echo "This container will now stop running."
exit 1
fi
echo "Installing Mercurial from ${SOURCE_DIR} into ${INSTALL_DIR}"
pushd ${SOURCE_DIR}
/usr/bin/python2.7 setup.py install --root=/ --prefix=${INSTALL_DIR} --force
popd
mkdir -p ${HTDOCS_DIR}
# Provide a default config if the user hasn't supplied one.
if [ ! -f ${HTDOCS_DIR}/config ]; then
cp /defaulthgwebconfig ${HTDOCS_DIR}/config
fi
if [ ! -f ${HTDOCS_DIR}/hgweb.wsgi ]; then
cat >> ${HTDOCS_DIR}/hgweb.wsgi << EOF
config = '${HTDOCS_DIR}/config'
import sys
sys.path.insert(0, '${INSTALL_DIR}/lib/python2.7/site-packages')
from mercurial import demandimport
demandimport.enable()
from mercurial.hgweb import hgweb
application = hgweb(config)
EOF
fi
mkdir -p ${REPOS_DIR}
if [ ! -d ${REPOS_DIR}/repo ]; then
${INSTALL_DIR}/bin/hg init ${REPOS_DIR}/repo
chown -R www-data:www-data ${REPOS_DIR}/repo
fi
# This is necessary to make debuginstall happy.
if [ ! -f ~/.hgrc ]; then
cat >> ~/.hgrc << EOF
[ui]
username = Dummy User <nobody@example.com>
EOF
fi
echo "Verifying Mercurial installation looks happy"
${INSTALL_DIR}/bin/hg debuginstall
. /etc/apache2/envvars
echo "Starting Apache HTTP Server on port 80"
echo "We hope you remembered to publish this port when running the container!"
echo "If this is an interactive container, simply CTRL^C to stop."
exec "$@"