Allow to copy files to the chroot environment and purge these files after the chroot script was executed.

scripts/README.md

@@ -17,12 +17,15 @@ Syntax: ./build.sh [start_cmd] [-] [end_cmd]
 
 ## How to Customize
 
-1. Copy the `default_config.sh` file to `config.sh` in the scripts directory.
+1. Copy the `chroot_files/default_config.sh` file to `chroot_files/config.sh` in the scripts directory.
 2. Make any necessary edits there, the script will pick up `config.sh` over `default_config.sh`.
+3. If you need to copy some files to the chroot environment, you can put them in `chroot_files` directory
+and retrieve these files in `/root` directory inside the chroot (the files will be purged after the chroot
+script was executed).
 
 ## How to Update
 
 The configuration script is versioned with the variable CONFIG_FILE_VERSION.  Any time that the configuration
 format is changed in `default_config.sh`, this value is bumped.  Once this happens `config.sh` must be updated manually
 from the default file to ensure the new/changed variables are as desired.  Once the merge is complete the `config.sh` file's
-CONFIG_FILE_VERSION should match the default and the build will run.
+CONFIG_FILE_VERSION should match the default and the build will run.

scripts/build.sh

@@ -75,12 +75,12 @@ function check_host() {
 
 # Load configuration values from file
 function load_config() {
-    if [[ -f "$SCRIPT_DIR/config.sh" ]]; then 
-        . "$SCRIPT_DIR/config.sh"
-    elif [[ -f "$SCRIPT_DIR/default_config.sh" ]]; then
+    if [[ -f "$SCRIPT_DIR/chroot_files/config.sh" ]]; then
+        . "$SCRIPT_DIR/chroot_files/config.sh"
+    elif [[ -f "$SCRIPT_DIR/chroot_files/default_config.sh" ]]; then
         . "$SCRIPT_DIR/default_config.sh"
     else
-        >&2 echo "Unable to find default config file  $SCRIPT_DIR/default_config.sh, aborting."
+        >&2 echo "Unable to find default config file  $SCRIPT_DIR/chroot_files/default_config.sh, aborting."
         exit 1
     fi
 }
@@ -114,21 +114,17 @@ function run_chroot() {
     chroot_enter_setup
 
     # Setup build scripts in chroot environment
-    sudo ln -f $SCRIPT_DIR/chroot_build.sh chroot/root/chroot_build.sh
-    sudo ln -f $SCRIPT_DIR/default_config.sh chroot/root/default_config.sh
-    if [[ -f "$SCRIPT_DIR/config.sh" ]]; then
-        sudo ln -f $SCRIPT_DIR/config.sh chroot/root/config.sh
-    fi    
+    for i in $(ls $SCRIPT_DIR/chroot_files -1); do
+        sudo ln -f $SCRIPT_DIR/chroot_files/$i chroot/root/$i
+    done
 
     # Launch into chroot environment to build install image.
     sudo chroot chroot /root/chroot_build.sh -
 
     # Cleanup after image changes
-    sudo rm -f chroot/root/chroot_build.sh
-    sudo rm -f chroot/root/default_config.sh
-    if [[ -f "chroot/root/config.sh" ]]; then
-        sudo rm -f chroot/root/config.sh
-    fi
+    for i in $(ls $SCRIPT_DIR/chroot_files -1); do
+        sudo rm -f chroot/root/$i
+    done
 
     chroot_exit_teardown
 }