Enter_chroot: Mount chrome browser source inside chroot.

src/scripts/enter_chroot.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. 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 enter the chroot environment
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
 # Script must be run outside the chroot and as a regular user.
 assert_outside_chroot
 assert_not_root_user
 
 # Define command line flags
 # See http://code.google.com/p/shflags/wiki/Documentation10x
 DEFINE_string chroot "$DEFAULT_CHROOT_DIR" \
   "The destination dir for the chroot environment." "d"
 DEFINE_string trunk "$GCLIENT_ROOT" \
   "The source trunk to bind mount within the chroot." "s"
 DEFINE_string build_number "" \
   "The build-bot build number (when called by buildbot only)." "b"
+DEFINE_string chrome_root "" \
+  "The root of your chrome browser source. Should contain a 'src' subdir."
 
 DEFINE_boolean official_build $FLAGS_FALSE "Set CHROMEOS_OFFICIAL=1 for release builds."
 DEFINE_boolean mount $FLAGS_FALSE "Only set up mounts."
 DEFINE_boolean unmount $FLAGS_FALSE "Only tear down mounts."
 
 # More useful help
 FLAGS_HELP="USAGE: $0 [flags] [VAR=value] [-- \"command\"]
 
 One or more VAR=value pairs can be specified to export variables into
 the chroot environment.  For example:
@@ skipping 17 matching lines @@
 if [ $FLAGS_official_build -eq $FLAGS_TRUE ]
 then
    CHROMEOS_OFFICIAL=1
 fi
 
 # Only now can we die on error.  shflags functions leak non-zero error codes,
 # so will die prematurely if 'set -e' is specified before now.
 # TODO: replace shflags with something less error-prone, or contribute a fix.
 set -e
 
+INNER_CHROME_ROOT="/home/$USER/chrome_root"  # inside chroot
+CHROME_ROOT_CONFIG="/var/cache/chrome_root"  # inside chroot
+
 sudo chmod 0777 "$FLAGS_chroot/var/lock"
 
 LOCKFILE="$FLAGS_chroot/var/lock/enter_chroot"
 
 function setup_env {
   (
     flock 200
     echo $$ >> "$LOCKFILE"
 
     echo "Mounting chroot environment."
 
     # Mount only if not already mounted
     MOUNTED_PATH="$(readlink -f "$FLAGS_chroot/proc")"
     if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
     then
       sudo mount none -t proc "$MOUNTED_PATH"
     fi
 
     MOUNTED_PATH="$(readlink -f "$FLAGS_chroot/dev/pts")"
     if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
     then
       sudo mount none -t devpts "$MOUNTED_PATH"
     fi
 
     MOUNTED_PATH="$(readlink -f "${FLAGS_chroot}$CHROOT_TRUNK_DIR")"
     if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
     then
       sudo mount --bind "$FLAGS_trunk" "$MOUNTED_PATH"
     fi
+
+    MOUNTED_PATH="$(readlink -f "${FLAGS_chroot}${INNER_CHROME_ROOT}")"
+    if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
+    then
+      CHROME_ROOT="$FLAGS_chrome_root"
+      if [ -z "$CHROME_ROOT" ]; then
+        ! CHROME_ROOT="$(cat "${FLAGS_chroot}${CHROME_ROOT_CONFIG}" \
+          2>/dev/null)"
+      fi
+      if [[ ( -z "$CHROME_ROOT" ) || ( ! -d "${CHROME_ROOT}/src" ) ]]; then
+        echo "Not mounting chrome source"
+        sudo rm -f "${FLAGS_chroot}${CHROME_ROOT_CONFIG}"
+      else
+        echo "Mouting chrome source at: $INNER_CHROME_ROOT"

[DaveMoore, 2010/02/12 22:31:12]

nit: spelling

+        echo "$CHROME_ROOT" | \
+          sudo dd of="${FLAGS_chroot}${CHROME_ROOT_CONFIG}"
+        mkdir -p "$MOUNTED_PATH"
+        sudo mount --bind "$CHROME_ROOT" "$MOUNTED_PATH"
+      fi
+    fi
   ) 200>>"$LOCKFILE"
 }
 
 function teardown_env {
   # Only teardown if we're the last enter_chroot to die
 
   (
     flock 200
 
     # check each pid in $LOCKFILE to see if it's died unexpectedly
@@ skipping 77 matching lines @@
 
 # Run command or interactive shell.  Also include the non-chrooted path to
 # the source trunk for scripts that may need to print it (e.g.
 # build_image.sh).
 sudo chroot "$FLAGS_chroot" sudo -i -u $USER $CHROOT_PASSTHRU \
   EXTERNAL_TRUNK_PATH="${FLAGS_trunk}" LANG=C "$@"
 
 # Remove trap and explicitly unmount
 trap - EXIT
 teardown_env