download: Add --help in the individual download scripts

This doesn't change the existing usage of the scripts:
- For the Coreboot script, before this change, all arguments that were
  passed were considered as board to download the Coreboot source code
  for.

  Here we added the '--help' and '--list-boards' arguments, so it
  should not be an issue as it is extremely unlikely that a board
  would be called '--help' or '--list-boards'.

- All the other scripts don't use any arguments so passing --help
  should not conflict with the existing usage.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/resources/scripts/download/coreboot b/resources/scripts/download/coreboot
index 6d0aa353..b94b1bc9 100755
--- a/resources/scripts/download/coreboot
+++ b/resources/scripts/download/coreboot
@@ -21,6 +21,42 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
+list_supported_boards()
+{
+	for board in resources/coreboot/*; do
+		echo $board | sed 's#resources/coreboot/##'
+	done
+}
+
+usage()
+{
+	progname="./download coreboot"
+	printf "Usage:\n"
+	printf "\t%s                     # %s\n" \
+	       "${progname}" \
+	       "Download and deblob Coreboot for all the boards"
+	printf "\t%s [board [board] ...] # %s\n" \
+	       "${progname}" \
+	       "Download and deblob Coreboot for the given boards"
+	printf "\t%s --list-boards       # %s\n" \
+	       "${progname}" \
+	       "Prints this help"
+	printf "\t%s --help              # %s\n" \
+	       "${progname}" \
+	       "List supported boards"
+	printf "\t%s --help              # %s\n" \
+	       "${progname}" \
+	       "Prints this help"
+}
+
+if [ $# -eq 1 -a "$1" == "--help" ] ; then
+	usage
+	exit 0
+elif [ $# -eq 1 -a "$1" == "--list-boards" ] ; then
+	list_supported_boards
+	exit 0
+fi
+
 # set this when you want to modify each coreboot tree
 # for example, you want to test custom patches
 # NODELETE= ./download coreboot