Add script to create a Debian chroot environment

tools/create_debian_chroot.sh

Index: tools/create_debian_chroot.sh
diff --git a/tools/create_debian_chroot.sh b/tools/create_debian_chroot.sh
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+#!/bin/bash
+#
+# Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+#
+# Script to create a Debian wheezy chroot environment for building Dart
+# Debian packages.
+#
+
+function usage {
+  USAGE="Usage: $0 i386|amd64 [target dir] [be|dev|<stable version>]]\n
+\n
+The first mandatory argument speciifies the CPU architecture using\n
+the Debian convention (e.g. i386 and amd64).\n
+\n
+The second optional argument specifies the destination\n
+directory. This defaults to 'debian_<architecture>'.\n
+\n
+The third optional argument specifies whether the chroot is\n
+populated with a Dart checkout. Use 'be' for bleeding edge, 'dev'\n
+for trunk/developer or the specific version number for a stable\n
+version (e.g. 1.2)."
+
+  echo -e $USAGE
+  exit 1
+}
+
+# Expect one to three arguments, architecture, optional directory and
+# optional channel.
+if [ $# -lt 1 ] || [ $# -gt 3 ]
+then
+  usage
+fi
+
+ARCH=$1
+
+if [ -n "$2" ]
+then
+  CHROOT=$2
+else
+  CHROOT=debian_$ARCH
+fi
+
+if [ -n "$3" ]
+then
+  CHANNEL=$3
+fi
+
+if [ "$ARCH" != "i386" ] && [ "$ARCH" != "amd64" ]
+then
+  usage
+fi
+
+SVN_REPRO="http://dart.googlecode.com/svn/"
+if [ -n "$CHANNEL" ]
+then
+  if [ "$CHANNEL" == "be" ]
+  then
+    SVN_PATH="branches/bleeding_edge/deps/all.deps"
+  elif [ "$CHANNEL" == "dev" ]
+  then
+    SVN_PATH="trunk/deps/all.deps"
+  else
+    SVN_PATH="branches/$CHANNEL/deps/all.deps"
+  fi
+fi
+SRC_URI=$SVN_REPRO$SVN_PATH
+
+# Create Debian wheezy chroot.
+debootstrap --arch=$ARCH --components=main,restricted,universe,multiverse \
+    wheezy $CHROOT http://http.us.debian.org/debian/
+chroot $CHROOT apt-get update
+mount -o bind /proc $CHROOT/proc  # Needed for openjdk-6-jdk.
+chroot $CHROOT apt-get -y install \
+    debhelper python g++-4.6 openjdk-6-jdk git subversion
+
+# Add chrome-bot user.
+chroot $CHROOT groupadd --gid 1000 chrome-bot
+chroot $CHROOT useradd --gid 1000 --uid 1000 --create-home chrome-bot
+mkdir $CHROOT/b
+chown 1000:1000 $CHROOT/b
+
+# Create trampoline script for running the initialization as chrome-bot.
+cat << EOF > $CHROOT/b/init_chroot_trampoline.sh
+#!/bin/sh
+su -c /b/init_chroot.sh chrome-bot
+EOF
+
+# Create initialization script which does nothing.
+cat << 'EOF' > $CHROOT/b/init_chroot.sh
+#!/bin/sh
+cd /b
+EOF
+
+# If the channel is set extend the initialization script to check out
+# the Dart sources. This uses two cat commands as the first part needs
+# to bypass variable interpretation.
+if [ -n "$SRC_URI" ]
+then
+cat << 'EOF' >> $CHROOT/b/init_chroot.sh
+git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
+export PATH=$PATH:/b/depot_tools
+EOF
+
+cat << EOF >> $CHROOT/b/init_chroot.sh
+gclient config $SRC_URI
+gclient sync
+gclient runhooks
+EOF
+fi
+
+chmod 755 $CHROOT/b/init_chroot_trampoline.sh
+
+chown 1000:1000 $CHROOT/b/init_chroot.sh
+chmod 755 $CHROOT/b/init_chroot.sh
+chroot $CHROOT /bin/sh /b/init_chroot_trampoline.sh