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cli: Add dump-before-validation option. #2468

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cli: Add dump-before-validation option. #2468

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14 changes: 14 additions & 0 deletions cli/src/bin/naga.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,10 @@ struct Args {
#[argh(switch)]
version: bool,

/// dump IR before validation
#[argh(option)]
dump_before_validation: Option<String>,

/// the input and output files.
///
/// First positional argument is the input file. If not specified, the
Expand Down Expand Up @@ -331,6 +335,16 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
_ => return Err(CliError("Unknown input file extension").into()),
};

// If requested, dump the IR before validation. Note that this is
// not equivalent to the `"txt"` output, because that includes the
// `ModuleInfo` produced by validation; this obviously cannot.
if let Some(ref dump_before_validation) = args.dump_before_validation {
use std::io::Write;

let mut file = fs::File::create(dump_before_validation)?;
writeln!(file, "{module:#?}")?;
}

// Decide which capabilities our output formats can support.
let validation_caps =
output_paths
Expand Down