internal/wasmtools: vendor wasm-tools with WebAssembly

.github/dependabot.yaml

@@ -23,3 +23,9 @@ updates:
     schedule:
       interval: weekly
     open-pull-requests-limit: 10
+
+  - package-ecosystem: cargo
+    directory: "/internal/wasmtools"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ on:
     paths-ignore:
         - '.prettier*'
         - '.vscode/**'
-        - '*.md'
+        - '**/*.md'
         - 'docs/**'
         - 'LICENSE'
 
@@ -56,11 +56,6 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
 
-      - name: Set up wasm-tools
-        uses: bytecodealliance/actions/wasm-tools/setup@v1
-        with:
-          version: ${{ env.wasm-tools-version }}
-
       - name: Run Go tests
         run: go test -v ${{ env.go-modules }}
 
@@ -100,11 +95,6 @@ jobs:
         with:
           tinygo-version: ${{ matrix.tinygo-version }}
 
-      - name: Set up wasm-tools
-        uses: bytecodealliance/actions/wasm-tools/setup@v1
-        with:
-          version: ${{ env.wasm-tools-version }}
-
       - name: Test with TinyGo
         run: tinygo test -v ${{ env.go-modules }}
 
@@ -136,6 +126,7 @@ jobs:
         with:
           tinygo-version: ${{ matrix.tinygo-version }}
 
+      # TinyGo needs wasm-tools for -target=wasip2
       - name: Set up wasm-tools
         uses: bytecodealliance/actions/wasm-tools/setup@v1
         with:

.gitignore

@@ -1,3 +1,5 @@
 .DS_Store
 /generated
+/internal/wasmtools/target
+/internal/wasmtools/wasm-tools.wasm
 go.work.sum

CHANGELOG.md

@@ -4,6 +4,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ## [Unreleased]
 
+### Added
+
+- [`wasm-tools`](https://crates.io/crates/wasm-tools) is now vendored as a WebAssembly module, executed using [Wazero](https://wazero.io/). This allows package `wit` and `wit-bindgen-go` to run on any supported platform without needing to separately install `wasm-tools`.
+
 ### Changed
 
 - Dropped support for TinyGo v0.32.0.

Makefile

@@ -5,7 +5,7 @@ wit_files = $(sort $(shell find testdata -name '*.wit' ! -name '*.golden.*'))
 json: $(wit_files)
 
 .PHONY: $(wit_files)
-$(wit_files):
+$(wit_files): internal/wasmtools/wasm-tools.wasm
 	wasm-tools component wit -j --all-features $@ > [email protected]
 
 # golden recompiles the .golden.wit test files.
@@ -21,12 +21,27 @@ generated: clean json
 .PHONY: clean
 clean:
 	rm -rf ./generated/*
+	rm -f internal/wasmtools/wasm-tools.wasm
+	rm -f internal/wasmtools/wasm-tools.wasm.gz
 
 # tests/generated writes generated Go code to the tests directory
 .PHONY: tests/generated
 tests/generated: json
 	go generate ./tests
 
+# wasm-tools builds the internal/wasmtools/wasm-tools.wasm.gz artifact
+.PHONY: wasm-tools
+wasm-tools: internal/wasmtools/target/wasm32-wasip1/release/wasm-tools.wasm
+	gzip -c $< > internal/wasmtools/wasm-tools.wasm.gz
+
+internal/wasmtools/target/wasm32-wasip1/release/wasm-tools.wasm: internal/wasmtools/Cargo.*
+	cd internal/wasmtools && \
+	cargo build --target wasm32-wasip1 --release -p wasm-tools
+
+# internal/wasmtools/wasm-tools.wasm decompresses wasm-tools.wasm.gz for other make targets
+internal/wasmtools/wasm-tools.wasm: internal/wasmtools/wasm-tools.wasm.gz
+	gzip -dc internal/wasmtools/wasm-tools.wasm.gz > $@
+
 # test runs Go and TinyGo tests
 GOTESTARGS :=
 GOTESTMODULES := ./... ./cm/...

cmd/wit-bindgen-go/main.go

@@ -9,7 +9,7 @@ import (
 
 	"go.bytecodealliance.org/cmd/wit-bindgen-go/cmd/generate"
 	"go.bytecodealliance.org/cmd/wit-bindgen-go/cmd/wit"
-	"go.bytecodealliance.org/internal/witcli"
+	"go.bytecodealliance.org/internal/module"
 )
 
 func main() {
@@ -64,7 +64,7 @@ var version = &cli.Command{
 	Name:  "version",
 	Usage: "print the version",
 	Action: func(ctx context.Context, cmd *cli.Command) error {
-		fmt.Fprintf(cmd.Writer, "%s version %s\n", cmd.Root().Name, witcli.Version())
+		fmt.Fprintf(cmd.Writer, "%s version %s\n", cmd.Root().Name, module.Version())
 		return nil
 	},
 }

go.mod

@@ -17,6 +17,7 @@ require (
 	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/tetratelabs/wazero v1.8.2 // indirect
 	github.com/ulikunitz/xz v0.5.12 // indirect
 	golang.org/x/sync v0.10.0 // indirect
 	golang.org/x/sys v0.28.0 // indirect

go.sum

@@ -29,6 +29,8 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tetratelabs/wazero v1.8.2 h1:yIgLR/b2bN31bjxwXHD8a3d+BogigR952csSDdLYEv4=
+github.com/tetratelabs/wazero v1.8.2/go.mod h1:yAI0XTsMBhREkM/YDAK/zNou3GoiAce1P6+rp/wQhjs=
 github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
 github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/urfave/cli/v3 v3.0.0-beta1 h1:6DTaaUarcM0wX7qj5Hcvs+5Dm3dyUTBbEwIWAjcw9Zg=

internal/cmd/wasm-tools/main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io/fs"
+	"os"
+
+	"go.bytecodealliance.org/internal/wasmtools"
+)
+
+func main() {
+	ctx := context.Background()
+	wasmTools, err := wasmtools.New(ctx)
+	if err != nil {
+		exit(err)
+	}
+
+	fsMap := map[string]fs.FS{
+		"./": os.DirFS("./"),
+	}
+
+	var args []string
+	if len(os.Args) != 0 {
+		args = os.Args[1:]
+	}
+
+	err = wasmTools.Run(ctx, os.Stdin, os.Stdout, os.Stderr, fsMap, args...)
+	if err != nil {
+		exit(err)
+	}
+}
+
+func exit(err error) {
+	fmt.Fprintf(os.Stderr, "wasm-tools: %v\n", err)
+	os.Exit(1)
+}

internal/witcli/version.go → internal/module/module.go

@@ -1,18 +1,32 @@
-package witcli
+package module
 
 import (
 	"runtime/debug"
 	"sync"
 )
 
-// Version returns the version string of this module.
+// Path returns the path of the main module.
+func Path() string {
+	build := buildInfo()
+	if build == nil {
+		return "(none)"
+	}
+	return build.Main.Path
+}
+
+// Version returns the version string of the main module.
 func Version() string {
 	return versionString()
 }
 
+var buildInfo = sync.OnceValue(func() *debug.BuildInfo {
+	build, _ := debug.ReadBuildInfo()
+	return build
+})
+
 var versionString = sync.OnceValue(func() string {
-	build, ok := debug.ReadBuildInfo()
-	if !ok {
+	build := buildInfo()
+	if build == nil {
 		return "(none)"
 	}
 	version := build.Main.Version