Add ARM cross-compiler to chroot.

This adds the ARM cross-compiler toolchain to the build chroot environment,
so we can start trying to compile things for ARM.

There's also a minor change to make_local_repo.sh and make_chroot.sh to
allow a second repository source. This is needed only for bootstrapping this
change (and others like it), and not required for normal use.

Review URL: http://codereview.chromium.org/507005

make_chroot.sh

@@ -27,6 +27,8 @@ DEFAULT_PKGLIST="$SRC_ROOT/package_repo/package-list-dev.txt"
 # See http://code.google.com/p/shflags/wiki/Documentation10x
 DEFINE_string suite "$DEFAULT_DEV_SUITE" "Repository suite to base image on."
 DEFINE_string mirror "$DEFAULT_DEV_MIRROR" "Local repository mirror to use."
+DEFINE_string mirror2 "" "Additional repository mirror to use (URL only)."
+DEFINE_string suite2 "" "Repository suite for additional mirror."
 DEFINE_string chroot "$DEFAULT_CHROOT_DIR" \
   "Destination dir for the chroot environment."
 DEFINE_string pkglist "$DEFAULT_PKGLIST" \
@@ -133,6 +135,12 @@ bash_chroot "echo $USER ALL=NOPASSWD: ALL >> /etc/sudoers"
 MIRROR_INSIDE="${FLAGS_mirror/$GCLIENT_ROOT/$CHROOT_TRUNK_DIR}"
 bash_chroot "echo deb $MIRROR_INSIDE $FLAGS_suite \
   main restricted multiverse universe > /etc/apt/sources.list"
+# Additional repo? Note: Not mounted inside - must use URL
+if [ -n "$FLAGS_mirror2" ]; then
+  bash_chroot "echo deb $FLAGS_mirror2 $FLAGS_suite2 \
+    main restricted multiverse universe >> /etc/apt/sources.list"
+fi
+
 # TODO: enable sources when needed.  Currently, kernel source is checked in
 # and all other sources are pulled via DEPS files.
 #bash_chroot "echo deb-src $MIRROR_INSIDE $FLAGS_suite \

make_local_repo.sh

@@ -19,6 +19,7 @@ DEFAULT_IMG_PKGLIST="$SRC_ROOT/package_repo/repo_list_image.txt"
 # Command line options
 DEFINE_string suite "$DEFAULT_EXT_SUITE" "Ubuntu suite to pull packages from."
 DEFINE_string mirror "$DEFAULT_EXT_MIRROR" "Ubuntu repository mirror to use."
+DEFINE_string mirror2 "" "Optional Chromium repository mirror to use."
 DEFINE_string dest "$DEFAULT_DEST" "Destination directory for repository."
 DEFINE_string devlist "$DEFAULT_DEV_PKGLIST" \
   "File listing packages to use for development."
@@ -162,20 +163,23 @@ function update_suite {
 
   # Add packages to the suite
   echo "Downloading packages..."
-  for DEB in `grep -v '^#' < $PKGLIST | awk '{print $1}'`
+  grep -v '^#' < $PKGLIST | while read DEB DEB_VER DEB_PRIO DEB_SECTION DEB_PATH
   do
+    [ -z "$DEB" ] && continue
     echo "Adding $DEB..."
 
-    DEB_PRIO=`cat $PKGLIST | grep '^'$DEB' ' | awk '{print $3}'`
+    DEB_FILE=$DEB_CACHE_DIR/${DEB_PATH##*/}
-    DEB_SECTION=`cat $PKGLIST | grep '^'$DEB' ' | awk '{print $4}'`
-    DEB_PATH=`cat $PKGLIST | grep '^'$DEB' ' | awk '{print $5}'`
-    DEB_FILE="$DEB_CACHE_DIR/"`basename $DEB_PATH`
 
     # Download the package if necessary
-    if [ ! -e "$CHROOT/$DEB_FILE" ]
+    if [ ! -s "$CHROOT/$DEB_FILE" ]
     then
+      if [ -n "FLAGS_mirror2" ]; then
+        in_chroot wget --no-verbose "$FLAGS_mirror/${DEB_PATH}" -O "$DEB_FILE" || \
+        in_chroot wget --no-verbose "$FLAGS_mirror2/${DEB_PATH}" -O "$DEB_FILE"
+      else
         in_chroot wget --no-verbose "$FLAGS_mirror/${DEB_PATH}" -O "$DEB_FILE"
       fi
+    fi
 
     # Copy the file into the target suite with the correct priority
     in_chroot reprepro -b "$REPO_SUBDIR" -P "$DEB_PRIO" -S "$DEB_SECTION" \