Function wasm_opt::integration::run_from_command_args

pub fn run_from_command_args(command: Command) -> Result<(), Error>

Interpret a pre-built Command as an OptimizationOptions, then call OptimizationOptions::run on it.

This function is meant for easy integration with tools that already call wasm-opt via the command line, allowing them to use either the command-line tool or the integrated API from a single Command builder. New programs that just need to optimize wasm should use OptimizationOptions directly.

This function is provided on a best-effort basis to support programs trying to integrate with the crate. In general, it should support any command line options that are also supported by the OptimizationOptions API, but it may not parse — and in some cases may not interpret — those commands in exactly the same way. It is meant to make it possible to produce a single command-line that works with both the CLI and the API, not to reproduce the behavior of the CLI perfectly.

The -o argument is required, followed by a path — the wasm-opt tool writes the optimized module to stdout by default, but this library is not currently capable of that. -o specifies a file in which to write the module. If -o is not provided, Error::OutputFileRequired is returned.

Only the arguments to command are interpreted; environment variables and other settings are ignored.

Errors

• Returns Error::Unsupported if any argument is not understood.
• Returns Error::OutputFileRequired if the -o argument and subsequent path are not provided.