~launchpad-pqm/launchpad/devel

#! /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"

YUI_PATH="$LP_PROJECT_ROOT/$LP_SOURCEDEPS_DIR/yui"

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" "$YUI_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 directories among local branches containing "sourcecode" directories.

# Prints each as a null-terminated record (since Unix filenames may contain

# newlines).

find_branches_to_relink() {

    find "$LP_PROJECT_PATH" \

        -mindepth 2 -maxdepth 2 -type d -name sourcecode -printf '%h\0'

}

# Some old setups (notably dogfood) may have lp-sourcedeps mixed in with the

# local branches.  Echo stdin to stdout, with these filenames filtered out.

# Filenames must be null-terminated on input, and remain null-terminated on

# output.

filter_branches_to_relink() {

    grep -vz '/lp-sourcedeps$'

}

# Re-link the sourcecode directories for local branches.  Takes the branch

# paths from stdin, as null-terminated records.

relink_branches() {

    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

}

# Actually do it:

find_branches_to_relink | filter_branches_to_relink | relink_branches

# Build launchpad if there were changes.

if [ $FINAL_REV != $INITIAL_REV ];

then

    make -C "$LP_TRUNK_PATH"

fi