~launchpad-pqm/launchpad/devel

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#! /bin/bash
#
# Copyright 2009-2011 Canonical Ltd.  This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
#
# Update your copy of trunk and the necessary source dependencies, and make
# sure all source dependencies are properly linked in to all the branches you
# are working on.

# Stop if there's an error, and treat unset variables as errors.
set -eu

# A rough measure of how much stuff we can do in parallel.
CPU_COUNT="$(egrep -c '^processor\b' /proc/cpuinfo)"

# Helper function to run a child process, indenting stdout to aid
# readability.
run-child() {
    "$@" | sed -e "s/^/        /"
}

# Load local settings.
if [ -e "$HOME/.rocketfuel-env.sh" ]
then
    source "$HOME/.rocketfuel-env.sh"
else
    echo "Please run rocketfuel-setup first." >&2
    exit 1
fi

LP_DOWNLOAD_CACHE_PATH="$LP_PROJECT_ROOT/$LP_SOURCEDEPS_DIR/download-cache"
LP_EGGS_PATH="$LP_PROJECT_ROOT/$LP_SOURCEDEPS_DIR/eggs"
LP_DOWNLOAD_CACHE_PATH="$(eval echo ${LP_DOWNLOAD_CACHE_PATH})"
LP_EGGS_PATH="$(eval echo ${LP_EGGS_PATH})"

# Pull launchpad devel from launchpad.
INITIAL_REV=$(bzr revno "$LP_TRUNK_PATH")
bzr pull -d "$LP_TRUNK_PATH"
FINAL_REV=$(bzr revno "$LP_TRUNK_PATH")

# Make sure our directories are around.
mkdir -p "$LP_SOURCEDEPS_PATH" "$LP_EGGS_PATH"

# Get/update the download cache.
if [ -d "$LP_DOWNLOAD_CACHE_PATH" ]
then
    bzr up "$LP_DOWNLOAD_CACHE_PATH"
else
    bzr co lp:lp-source-dependencies "$LP_DOWNLOAD_CACHE_PATH"
fi

# Add or update sourcepackages.
sourcedeps_conf="$(dirname "$0")/sourcedeps.conf"
if [ ! -e "$sourcedeps_conf" ]
then
    # Use the global deps which are stable.
    echo "Could not find $sourcedeps_conf" >&2
    sourcedeps_conf="$LP_TRUNK_PATH/utilities/sourcedeps.conf"
fi

echo "Updating sourcecode dependencies in rocketfuel:"
run-child \
    "$LP_TRUNK_PATH/utilities/update-sourcecode" \
    "$LP_SOURCEDEPS_PATH" "$sourcedeps_conf"

# Update the current trees in the repo.
echo "Updating sourcecode dependencies in current local branches:"
find "$LP_PROJECT_PATH" -mindepth 2 -maxdepth 2 \
    -type d -name sourcecode -printf '%h\0' | \
    run-child xargs --no-run-if-empty \
        --max-procs="${CPU_COUNT}" --max-args=1 --null \
        "$LP_TRUNK_PATH/utilities/link-external-sourcecode" \
            --parent "$LP_PROJECT_ROOT/$LP_SOURCEDEPS_DIR" --target

# Build launchpad if there were changes.
if [ $FINAL_REV != $INITIAL_REV ];
then
    make -C "$LP_TRUNK_PATH"
fi