Add categories to --help text (#4421)

The general shape of the --help output is now:



========================
wasm-foo

Does the foo operation
========================

wasm-foo opts:
--------------

  --foo-bar   ..

Tool opts:
----------

..




The options are now in categories, with the more specific ones - most likely to be
wanted by the user - first. I think this makes the list a lot less confusing.

In particular, in wasm-opt all the opt passes are now in their own category.

Also add a script to make it easy to update the help tests.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/tools/wasm-split/split-options.h b/src/tools/wasm-split/split-options.h
index faa6ee30f..d52f215cd 100644
--- a/src/tools/wasm-split/split-options.h
+++ b/src/tools/wasm-split/split-options.h
@@ -75,12 +75,14 @@ struct WasmSplitOptions : ToolOptions {
   WasmSplitOptions& add(const std::string& longName,
                         const std::string& shortName,
                         const std::string& description,
+                        const std::string& category,
                         std::vector<Mode>&& modes,
                         Arguments arguments,
                         const Action& action);
   WasmSplitOptions& add(const std::string& longName,
                         const std::string& shortName,
                         const std::string& description,
+                        const std::string& category,
                         Arguments arguments,
                         const Action& action);
   bool validate();