binman: Use an exit code when blobs are missing

At present binman returns success when told to handle missing/faked blobs
or missing bintools. This is confusing since in fact the resulting image
cannot work.

Use exit code 103 to signal this problem, with a -W option to convert
it to a warning.

Rename the flag to --ignore-missing since it controls bintools also.

Add documentation about exit codes while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/binman/cmdline.py b/tools/binman/cmdline.py
index 1d1ca43993..986d6f1a31 100644
--- a/tools/binman/cmdline.py
+++ b/tools/binman/cmdline.py
@@ -114,7 +114,7 @@ controlled by a description in the board device tree.'''
     build_parser.add_argument('-m', '--map', action='store_true',
         default=False, help='Output a map file for each image')
     build_parser.add_argument('-M', '--allow-missing', action='store_true',
-        default=False, help='Allow external blobs to be missing')
+        default=False, help='Allow external blobs and bintools to be missing')
     build_parser.add_argument('-n', '--no-expanded', action='store_true',
             help="Don't use 'expanded' versions of entries where available; "
                  "normally 'u-boot' becomes 'u-boot-expanded', for example")
@@ -128,6 +128,9 @@ controlled by a description in the board device tree.'''
         default=False, help='Update the binman node with offset/size info')
     build_parser.add_argument('--update-fdt-in-elf', type=str,
         help='Update an ELF file with the output dtb: infile,outfile,begin_sym,end_sym')
+    build_parser.add_argument(
+        '-W', '--ignore-missing', action='store_true', default=False,
+        help='Return success even if there are missing blobs/bintools (requires -M)')
 
     subparsers.add_parser(
         'bintool-docs', help='Write out bintool documentation (see bintool.rst)')