deps: make ONNX support optional

Author: theHamsta

Cargo.lock

@@ -13,6 +13,10 @@ path = "src/lib.rs"
 name = "webnn-graph"
 path = "src/main.rs"
 
+[features]
+default = ["onnx"]
+onnx = ["dep:webnn-onnx-utils"]
+
 [dependencies]
 anyhow = "1.0"
 serde = { version = "1.0", features = ["derive"] }
@@ -25,7 +29,7 @@ pest_derive = "2.7"
 clap = { version = "4.5", features = ["derive"] }
 base64 = "0.22"
 prost = "0.12"
-webnn-onnx-utils = { git = "https://github.com/rustnn/webnn-onnx-utils", branch = "main" }
+webnn-onnx-utils = { git = "https://github.com/rustnn/webnn-onnx-utils", branch = "main", optional = true }
 
 [dev-dependencies]
 tempfile = "3.8"

Cargo.toml

@@ -5,10 +5,13 @@ pub use external_weights::{resolve_external_weights, WeightResolveError};
 
 pub mod emit_html;
 pub mod emit_js;
-pub mod onnx;
 pub mod parser;
-pub mod protos;
 pub mod serialize;
 pub mod validate;
 pub mod weights;
 pub mod weights_io;
+
+#[cfg(feature = "onnx")]
+pub mod onnx;
+#[cfg(feature = "onnx")]
+pub mod protos;

src/lib.rs

@@ -1,10 +1,12 @@
 use clap::{Parser, Subcommand};
 use std::fs;
+#[cfg(feature = "onnx")]
 use std::path::Path;
 
 use webnn_graph::ast::GraphJson;
 use webnn_graph::emit_html::emit_html;
 use webnn_graph::emit_js::{emit_builder_js, emit_weights_loader_js};
+#[cfg(feature = "onnx")]
 use webnn_graph::onnx::convert::{convert_onnx, ConvertOptions};
 use webnn_graph::parser::parse_wg_text;
 use webnn_graph::serialize::serialize_graph_to_wg_text;
@@ -94,6 +96,7 @@ enum Command {
         #[arg(long)]
         output: String,
     },
+    #[cfg(feature = "onnx")]
     ConvertOnnx {
         /// Input ONNX model file (.onnx)
         #[arg(long)]
@@ -256,6 +259,7 @@ fn main() -> anyhow::Result<()> {
             fs::write(&output, json)?;
             eprintln!("Wrote graph with inline weights to: {}", output);
         }
+        #[cfg(feature = "onnx")]
         Command::ConvertOnnx {
             input,
             output,