Obviate manual dependency on wasm-gc executable

Dockerfile

@@ -20,7 +20,6 @@ RUN curl https://sh.rustup.rs -sSf | sh -s -- -y && \
 	export PATH="$PATH:$HOME/.cargo/bin" && \
 	rustup toolchain install nightly && \
 	rustup target add wasm32-unknown-unknown --toolchain nightly && \
-	cargo install --git https://github.com/alexcrichton/wasm-gc && \
 	rustup default nightly && \
 	rustup default stable && \
 	cargo build "--$PROFILE"

README.adoc

@@ -184,7 +184,6 @@ curl https://sh.rustup.rs -sSf | sh
 rustup update nightly
 rustup target add wasm32-unknown-unknown --toolchain nightly
 rustup update stable
-cargo install --git https://github.com/alexcrichton/wasm-gc
 ----
 
 You will also need to install the following packages:
@@ -231,13 +230,9 @@ If you are trying to set up Substrate on Windows, you should do the following:
 	rustup update stable
 	rustup target add wasm32-unknown-unknown --toolchain nightly
 
-4. Next, you install wasm-gc, which is used to slim down Wasm files:
+4. Then, you need to install LLVM: https://releases.llvm.org/download.html
 
-	cargo install --git https://github.com/alexcrichton/wasm-gc --force
-
-5. Then, you need to install LLVM: https://releases.llvm.org/download.html
-
-6. Next, you need to install OpenSSL, which we will do with `vcpkg`:
+5. Next, you need to install OpenSSL, which we will do with `vcpkg`:
 
 	mkdir \Tools
 	cd \Tools
@@ -246,14 +241,14 @@ If you are trying to set up Substrate on Windows, you should do the following:
 	.\bootstrap-vcpkg.bat
 	.\vcpkg.exe install openssl:x64-windows-static
 
-7. After, you need to add OpenSSL to your System Variables. Note that in order for the following commands to work, you need to use Windows Powershell:
+6. After, you need to add OpenSSL to your System Variables. Note that in order for the following commands to work, you need to use Windows Powershell:
 
 	$env:OPENSSL_DIR = 'C:\Tools\vcpkg\installed\x64-windows-static'
 	$env:OPENSSL_STATIC = 'Yes'
 	[System.Environment]::SetEnvironmentVariable('OPENSSL_DIR', $env:OPENSSL_DIR, [System.EnvironmentVariableTarget]::User)
 	[System.Environment]::SetEnvironmentVariable('OPENSSL_STATIC', $env:OPENSSL_STATIC, [System.EnvironmentVariableTarget]::User)
 
-8. Finally, you need to install `cmake`: https://cmake.org/download/
+7. Finally, you need to install `cmake`: https://cmake.org/download/
 
 ==== Shared Steps
 

core/utils/wasm-builder/Cargo.toml

@@ -15,3 +15,4 @@ tempfile = "3.1.0"
 toml = "0.5.3"
 walkdir = "2.2.9"
 fs2 = "0.4.3"
+wasm-gc-api = "0.1.11"

core/utils/wasm-builder/README.md

@@ -57,7 +57,6 @@ be `NODE_RUNTIME`.
 WASM builder requires the following prerequisities for building the WASM binary:
 
 - rust nightly + `wasm32-unknown-unknown` toolchain
-- wasm-gc
 
 
 License: GPL-3.0

core/utils/wasm-builder/src/lib.rs

@@ -75,7 +75,6 @@
 //! WASM builder requires the following prerequisities for building the WASM binary:
 //!
 //! - rust nightly + `wasm32-unknown-unknown` toolchain
-//! - wasm-gc
 //!
 
 use std::{env, fs, path::PathBuf, process::{Command, Stdio, self}};

core/utils/wasm-builder/src/prerequisites.rs

@@ -14,9 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
-use std::{process::{Command, Stdio}, fs};
-
-use std::env;
+use std::{env, fs};
 use tempfile::tempdir;
 
 /// Checks that all prerequisites are installed.
@@ -28,15 +26,6 @@ pub fn check() -> Option<&'static str> {
 		return Some("Rust nightly not installed, please install it!")
 	}
 
-	if Command::new("wasm-gc")
-		.stdout(Stdio::null())
-		.stderr(Stdio::null())
-		.status()
-		.map(|s| !s.success()).unwrap_or(true)
-	{
-		return Some("`wasm-gc` not installed, please install it!")
-	}
-
 	check_wasm_toolchain_installed()
 }
 

core/utils/wasm-builder/src/wasm_project.rs

@@ -16,7 +16,7 @@
 
 use crate::write_file_if_changed;
 
-use std::{fs, path::{Path, PathBuf}, borrow::ToOwned, process::{Command, self}, env};
+use std::{fs, path::{Path, PathBuf}, borrow::ToOwned, process, env};
 
 use toml::value::Table;
 
@@ -352,15 +352,8 @@ fn compact_wasm_file(
 		.join(format!("{}.wasm", wasm_binary));
 	let wasm_compact_file = project.join(format!("{}.compact.wasm", wasm_binary));
 
-	let res = Command::new("wasm-gc")
-		.arg(&wasm_file)
-		.arg(&wasm_compact_file)
-		.status()
-		.map(|s| s.success());
-
-	if !res.unwrap_or(false) {
-		panic!("Failed to compact generated WASM binary.");
-	}
+	wasm_gc::garbage_collect_file(&wasm_file, &wasm_compact_file)
+		.expect("Failed to compact generated WASM binary.");
 
 	(WasmBinary(wasm_compact_file), WasmBinaryBloaty(wasm_file))
 }

node-template/scripts/init.sh

@@ -10,7 +10,3 @@ if [ -z $CI_PROJECT_NAME ] ; then
 fi
 
 rustup target add wasm32-unknown-unknown --toolchain nightly
-
-# Install wasm-gc. It's useful for stripping slimming down wasm binaries.
-command -v wasm-gc || \
-	cargo +nightly install --git https://github.com/alexcrichton/wasm-gc --force

scripts/init.sh

@@ -10,7 +10,3 @@ if [ -z $CI_PROJECT_NAME ] ; then
 fi
 
 rustup target add wasm32-unknown-unknown --toolchain nightly
-
-# Install wasm-gc. It's useful for stripping slimming down wasm binaries.
-command -v wasm-gc || \
-	cargo +nightly install --git https://github.com/alexcrichton/wasm-gc --force