[libcamera-devel] [PATCH] cam: options: optional arguments needs to be specified as --foo=bar

[Niklas Söderlund]

It's not state in the documentation but optional arguments needs to be
specified using as '--foo=bar' instead of '--foo bar', otherwise the
value is not propagated to optarg during argument parsing. Update the
usage printing helper to reflect this requirement.

Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
---
 src/cam/options.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cam/options.cpp b/src/cam/options.cpp
index 82acff9bbeea476d..73d81d0bc0ec6d38 100644
--- a/src/cam/options.cpp
+++ b/src/cam/options.cpp
@@ -143,7 +143,8 @@ void OptionsParser::usage()
 		};
 
 		if (option.argument != ArgumentNone) {
-			argument += std::string(" ");
+			argument += option.argument == ArgumentOptional ?
+				"=" : " ";
 			if (option.argument == ArgumentOptional)
 				argument += "[";
 			argument += option.argumentName;
-- 
2.20.1