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202 lines
6.8 KiB
Bash
Executable File
202 lines
6.8 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This script sets up an Ubuntu chroot environment. The ideas come
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# from https://wiki.ubuntu.com/DebootstrapChroot and conversations with
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# tedbo. The script is passed the path to an empty folder, which will be
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# populated with the files to form an Ubuntu Jaunty system with the packages
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# listed in PACKAGE_LIST_FILE (below) and their dependencies. Once created,
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# the password is set to PASSWORD (below). One can enter the chrooted
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# environment for work by running
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# enter_chroot_dev_environment.sh /path/to/chroot-root
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# Load common constants. This should be the first executable line.
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# The path to common.sh should be relative to your script's location.
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. "$(dirname "$0")/common.sh"
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# Script must be run outside the chroot
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assert_outside_chroot
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DEFAULT_PKGLIST="$SRC_ROOT/package_repo/package-list-dev.txt"
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# Define command line flags
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# See http://code.google.com/p/shflags/wiki/Documentation10x
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DEFINE_string suite "$DEFAULT_DEV_SUITE" "Repository suite to base image on."
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DEFINE_string mirror "$DEFAULT_DEV_MIRROR" "Local repository mirror to use."
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DEFINE_string chroot "$DEFAULT_CHROOT_DIR" \
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"Destination dir for the chroot environment."
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DEFINE_string pkglist "$DEFAULT_PKGLIST" \
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"File listing additional packages to install."
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DEFINE_boolean delete $FLAGS_FALSE "Delete an existing chroot."
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DEFINE_boolean replace $FLAGS_FALSE "Overwrite existing chroot, if any."
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# Parse command line flags
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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# Only now can we die on error. shflags functions leak non-zero error codes,
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# so will die prematurely if 'set -e' is specified before now.
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# TODO: replace shflags with something less error-prone, or contribute a fix.
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set -e
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COMPONENTS=`cat $FLAGS_pkglist | grep -v ' *#' | grep -v '^ *$' | tr '\n' ' '`
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FULLNAME="Chrome OS dev user"
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DEFGROUPS="eng,admin,adm,dialout,cdrom,floppy,audio,dip,video"
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PASSWORD=chronos
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CRYPTED_PASSWD=$(perl -e 'print crypt($ARGV[0], "foo")', $PASSWORD)
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function in_chroot {
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sudo chroot "$FLAGS_chroot" "$@"
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}
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function bash_chroot {
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# Use $* not $@ since 'bash -c' needs a single arg
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sudo chroot "$FLAGS_chroot" bash -c "$*"
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}
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function cleanup {
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# Clean up mounts
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mount | grep "on $(readlink -f "$FLAGS_chroot")" | awk '{print $3}' \
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| xargs -r -L1 sudo umount
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}
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function delete_existing {
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# Delete old chroot dir
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if [ -e "$FLAGS_chroot" ]
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then
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echo "Cleaning up old mount points..."
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cleanup
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echo "Deleting $FLAGS_chroot..."
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sudo rm -rf "$FLAGS_chroot"
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fi
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}
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# Install packages which may not be installed on the local system
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install_if_missing debootstrap
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# Add debootstrap link for the suite, if it doesn't exist.
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if [ ! -e "/usr/share/debootstrap/scripts/$FLAGS_suite" ]
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then
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sudo ln -s /usr/share/debootstrap/scripts/hardy \
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"/usr/share/debootstrap/scripts/$FLAGS_suite"
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fi
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# Handle deleting an existing environment
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if [ $FLAGS_delete -eq $FLAGS_TRUE ]
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then
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delete_existing
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echo "Done."
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exit 0
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fi
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# Handle existing directory
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if [ -e "$FLAGS_chroot" ]
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then
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if [ $FLAGS_replace -eq $FLAGS_TRUE ]
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then
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delete_existing
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else
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echo "Directory $FLAGS_chroot already exists."
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echo "Use --replace if you really want to overwrite it."
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exit 1
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fi
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fi
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# Create the destination directory
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mkdir -p "$FLAGS_chroot"
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# Run debootstrap to create the base chroot environment
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echo "Running debootstrap..."
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echo "You may need to enter password for sudo now..."
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sudo debootstrap --arch=i386 "$FLAGS_suite" "$FLAGS_chroot" "$FLAGS_mirror"
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echo "Done running debootstrap."
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# Set up necessary mounts
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sudo mount none -t proc "$FLAGS_chroot/proc"
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sudo mount none -t devpts "$FLAGS_chroot/dev/pts"
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# ...and make sure we clean them up on exit
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trap cleanup EXIT
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# Set up sudoers. Inside the chroot, the user can sudo without a password.
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# (Safe enough, since the only way into the chroot is to 'sudo chroot', so
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# the user's already typed in one sudo password...)
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bash_chroot "echo %admin ALL=\(ALL\) ALL >> /etc/sudoers"
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bash_chroot "echo $USER ALL=NOPASSWD: ALL >> /etc/sudoers"
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# Set up apt sources
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# If a local repository is used, it will have a different path when
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# bind-mounted inside the chroot
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MIRROR_INSIDE="${FLAGS_mirror/$GCLIENT_ROOT/$CHROOT_TRUNK_DIR}"
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bash_chroot "echo deb $MIRROR_INSIDE $FLAGS_suite \
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main restricted multiverse universe > /etc/apt/sources.list"
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# TODO: enable sources when needed. Currently, kernel source is checked in
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# and all other sources are pulled via DEPS files.
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#bash_chroot "echo deb-src $MIRROR_INSIDE $FLAGS_suite \
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# main restricted multiverse universe >> /etc/apt/sources.list"
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# Set /etc/debian_chroot so '(chroot)' shows up in shell prompts
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CHROOT_BASE=`basename $FLAGS_chroot`
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bash_chroot "echo $CHROOT_BASE > /etc/debian_chroot"
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# Copy config from outside chroot into chroot
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sudo cp /etc/hosts "$FLAGS_chroot/etc/hosts"
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# Add ourselves as a user inside the chroot
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in_chroot groupadd admin
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in_chroot groupadd -g 5000 eng
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in_chroot useradd -G ${DEFGROUPS} -g eng -u `id -u` -s \
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/bin/bash -m -c "${FULLNAME}" -p ${CRYPTED_PASSWD} ${USER}
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# Bind-mount trunk into chroot so we can install local packages
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mkdir "${FLAGS_chroot}$CHROOT_TRUNK_DIR"
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sudo mount --bind "$GCLIENT_ROOT" "${FLAGS_chroot}$CHROOT_TRUNK_DIR"
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# Niceties for interactive logins ('enter_chroot.sh'); these are ignored
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# when specifying a command to enter_chroot.sh.
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# Warn less when apt-get installing packqages
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echo "export LANG=C" >> "$FLAGS_chroot/home/$USER/.bashrc"
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chmod a+x "$FLAGS_chroot/home/$USER/.bashrc"
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# Automatically change to scripts directory
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echo "cd trunk/src/scripts" >> "$FLAGS_chroot/home/$USER/.profile"
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# Warn if attempting to use source control commands inside the chroot
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for NOUSE in svn gcl gclient
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do
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echo "alias $NOUSE='echo In the chroot, it is a bad idea to run $NOUSE'" \
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>> "$FLAGS_chroot/home/$USER/.profile"
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done
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if [ "$USER" = "chrome-bot" ]
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then
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# Copy ssh keys, so chroot'd chrome-bot can scp files from chrome-web.
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cp -r ~/.ssh "$FLAGS_chroot/home/$USER/"
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fi
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# Install additional packages
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echo "Installing additional packages..."
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in_chroot apt-get update
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bash_chroot "export DEBIAN_FRONTEND=noninteractive LANG=C && \
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apt-get --yes --force-yes install $COMPONENTS"
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# Clean up the chroot mounts
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trap - EXIT
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cleanup
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if [ "$FLAGS_chroot" = "$DEFAULT_CHROOT_DIR" ]
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then
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CHROOT_EXAMPLE_OPT=""
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else
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CHROOT_EXAMPLE_OPT="--chroot=$FLAGS_chroot"
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fi
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echo "All set up. To enter the chroot, run:"
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echo " $SCRIPTS_DIR/enter_chroot.sh $CHROOT_EXAMPLE_OPT"
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echo ""
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echo "CAUTION: Do *NOT* rm -rf the chroot directory; if there are stale bind"
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echo "mounts you may end up deleting your source tree too. To unmount and"
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echo "delete the chroot cleanly, use:"
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echo " $0 --delete $CHROOT_EXAMPLE_OPT"
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