Extract json-from-wast to its own crate (#2247)

* Extract `json-from-wast` subcommand to its own crate

Polish it up a bit for publication to crates.io to get used externally
as well, for example in Rust projects that want to consume the AST
produced here.

* Refine the AST of json-from-wast

This mostly doesn't change the JSON representation or how things are
serialized, but this does change the Rust-level representation to make
it easier to consume from a Rust crate (less stringly-typed). A few
minor adjustments were made and additionally new structures are
supported (e.g. component model types)

* Undo some `dbg!`

* Undo some `gc.rs` changes

* Fix MSRV compat

* Add to publish list

* Remove readme directive

Author: alexcrichton

Cargo.lock

@@ -156,6 +156,7 @@ wit-component = { version = "0.235.0", path = "crates/wit-component" }
 wit-encoder = { version = "0.235.0", path = "crates/wit-encoder" }
 wit-parser = { version = "0.235.0", path = "crates/wit-parser" }
 wit-smith = { version = "0.235.0", path = "crates/wit-smith" }
+json-from-wast = { version = "0.235.0", path = "crates/json-from-wast" }
 
 [dependencies]
 anyhow = { workspace = true }
@@ -220,6 +221,9 @@ gimli = { workspace = true, optional = true }
 # Dependencies of `wast`
 pretty_assertions = { workspace = true, optional = true }
 
+# Dependencies of `json-from-wast`
+json-from-wast = { workspace = true, optional = true }
+
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
 is_executable = { version = "1.0.1", optional = true }
 
@@ -291,7 +295,7 @@ metadata = ['wasm-metadata', 'dep:serde_json']
 wit-smith = ['dep:wit-smith', 'arbitrary']
 addr2line = ['dep:addr2line', 'dep:gimli']
 completion = ['dep:clap_complete']
-json-from-wast = ['dep:serde_derive', 'dep:serde_json', 'dep:wast', 'dep:serde']
+json-from-wast = ['dep:json-from-wast', 'dep:wast', 'dep:serde_json']
 wast = [
   'dep:wast',
   'wasm-encoder/wasmparser',

Cargo.toml

@@ -31,6 +31,7 @@ const CRATES_TO_PUBLISH: &[&str] = &[
     "wit-encoder",
     "wasm-compose",
     "wit-smith",
+    "json-from-wast",
     "wasm-wave",
     "wasm-tools",
 ];

ci/publish.rs

@@ -0,0 +1,21 @@
+[package]
+name = "json-from-wast"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository = "https://github.com/bytecodealliance/wasm-tools/tree/main/crates/json-from-wast"
+homepage = "https://github.com/bytecodealliance/wasm-tools/tree/main/crates/json-from-wast"
+documentation = "https://docs.rs/json-from-wast"
+description = """
+Conversion from `*.wast` files to JSON.
+"""
+rust-version.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+anyhow = { workspace = true }
+serde = { workspace = true, features = ['derive'] }
+serde_derive = { workspace = true }
+wast = { workspace = true, features = ['wasm-module', 'dwarf', 'component-model'] }