Stevenmasley/wasm #71
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,8 +1,17 @@ | ||
| GO_SRC_FILES := $(shell find . $(FIND_EXCLUSIONS) -type f -name '*.go' -not -name '*_test.go') | ||
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| .PHONY: gen | ||
| gen: | ||
| @echo "Generating code..." | ||
| go generate ./... | ||
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| .PHONY: clean-testdata | ||
| clean-testdata: | ||
| git clean -xfd testdata | ||
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| .PHONY: build-wasm | ||
| build-wasm: site/public/build/preview.wasm | ||
| mkdir -p ./site/public/build/ | ||
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| site/public/build/preview.wasm: $(GO_SRC_FILES) | ||
| GOOS=js GOARCH=wasm go build -o site/public/build/preview.wasm ./cmd/wasm | ||
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| Original file line number | Diff line number | Diff line change | ||||
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| @@ -0,0 +1,87 @@ | ||||||
| //go:build js && wasm | ||||||
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| package main | ||||||
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| import ( | ||||||
| "context" | ||||||
| "encoding/json" | ||||||
| "fmt" | ||||||
| "io/fs" | ||||||
| "path/filepath" | ||||||
| "syscall/js" | ||||||
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| "github.com/spf13/afero" | ||||||
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| "github.com/coder/preview" | ||||||
| "github.com/coder/preview/types" | ||||||
| ) | ||||||
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| func main() { | ||||||
| // Create a channel to keep the Go program alive | ||||||
| done := make(chan struct{}, 0) | ||||||
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Suggested change
it's fine for unbuffered to be implied imo There was a problem hiding this comment. Hey this is a draft for a reason! To be 100% transparent, this was almost all written by cursor lol |
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| // Expose the Go function `fibonacciSum` to JavaScript | ||||||
| js.Global().Set("go_preview", js.FuncOf(tfpreview)) | ||||||
| js.Global() | ||||||
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| // Block the program from exiting | ||||||
| <-done | ||||||
| } | ||||||
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| func tfpreview(this js.Value, p []js.Value) any { | ||||||
| tf, err := fileTreeFS(p[0]) | ||||||
| if err != nil { | ||||||
| return err | ||||||
| } | ||||||
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| output, diags := preview.Preview(context.Background(), preview.Input{ | ||||||
| PlanJSONPath: "", | ||||||
| PlanJSON: nil, | ||||||
| ParameterValues: nil, | ||||||
| Owner: types.WorkspaceOwner{}, | ||||||
| }, tf) | ||||||
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| data, _ := json.Marshal(map[string]any{ | ||||||
| "output": output, | ||||||
| "diags": diags, | ||||||
| }) | ||||||
| return js.ValueOf(string(data)) | ||||||
| } | ||||||
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| func fileTreeFS(value js.Value) (fs.FS, error) { | ||||||
| data := js.Global().Get("JSON").Call("stringify", value).String() | ||||||
| var filetree map[string]any | ||||||
| if err := json.Unmarshal([]byte(data), &filetree); err != nil { | ||||||
| return nil, err | ||||||
| } | ||||||
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| mem := afero.NewMemMapFs() | ||||||
| loadTree(mem, filetree) | ||||||
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| return afero.NewIOFS(mem), nil | ||||||
| } | ||||||
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| func loadTree(mem afero.Fs, fileTree map[string]any, path ...string) { | ||||||
| dir := filepath.Join(path...) | ||||||
| err := mem.MkdirAll(dir, 0755) | ||||||
| if err != nil { | ||||||
| fmt.Printf("error creating directory %q: %v\n", dir, err) | ||||||
| } | ||||||
| for k, v := range fileTree { | ||||||
| switch vv := v.(type) { | ||||||
| case string: | ||||||
| fn := filepath.Join(dir, k) | ||||||
| f, err := mem.Create(fn) | ||||||
| if err != nil { | ||||||
| fmt.Printf("error creating file %q: %v\n", fn, err) | ||||||
| continue | ||||||
| } | ||||||
| _, _ = f.WriteString(vv) | ||||||
| f.Close() | ||||||
| case map[string]any: | ||||||
| loadTree(mem, vv, append(path, k)...) | ||||||
| default: | ||||||
| fmt.Printf("unknown type %T for %q\n", v, k) | ||||||
| } | ||||||
| } | ||||||
| } | ||||||
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| Original file line number | Diff line number | Diff line change |
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@@ -6,7 +6,7 @@ | |
| <link href="/src/index.css" rel="stylesheet"> | ||
| <title>Conditional Parameters</title> | ||
| </head> | ||
| <body> | ||
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| <div id="root"></div> | ||
| <script type="module" src="/src/main.tsx"></script> | ||
| </body> | ||
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| Original file line number | Diff line number | Diff line change |
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@@ -27,6 +27,7 @@ | |
| "react-dom": "^19.0.0", | ||
| "react-hook-form": "^7.54.2", | ||
| "react-json-view": "^1.21.3", | ||
| "react-router-dom": "^7.5.0", | ||
| "tailwind-merge": "^3.0.2", | ||
| "tailwindcss": "^4.0.9", | ||
| "tailwindcss-animate": "^1.0.7" | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,11 +1,19 @@ | ||
| import './App.css' | ||
| import { DemoPage } from './DemoPage' | ||
| import { Live } from './components/Live' | ||
| import { ThemeProvider } from "./components/theme-provider" | ||
| import { BrowserRouter, Routes, Route } from 'react-router-dom' | ||
| import { PreviewProvider } from './contexts/PreviewContext/PreviewContext' | ||
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| function App() { | ||
| return ( | ||
| <ThemeProvider defaultTheme="dark" storageKey="vite-ui-theme"> | ||
| <BrowserRouter> | ||
| <Routes> | ||
| <Route path="/" element={<DemoPage />} /> | ||
| <Route path="/live" element={<PreviewProvider><Live /> </PreviewProvider>} /> | ||
| </Routes> | ||
| </BrowserRouter> | ||
| </ThemeProvider> | ||
| ); | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,30 @@ | ||
| import { usePreview } from '../contexts/PreviewContext/PreviewContext'; | ||
| import { useState } from 'react'; | ||
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| export function Live() { | ||
| const { isWasmLoaded, preview } = usePreview(); | ||
| const [previewResult, setPreviewResult] = useState<string | null>(null); | ||
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| const handlePreviewClick = async () => { | ||
| try { | ||
| const result = await preview(); | ||
| setPreviewResult(result); | ||
| } catch (error) { | ||
| console.error('Error calling preview:', error); | ||
| } | ||
| }; | ||
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| return ( | ||
| <div> | ||
| {isWasmLoaded && <p>Wasm Loaded</p>} | ||
| {!isWasmLoaded && <p>Wasm not Loaded</p>} | ||
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| <button onClick={handlePreviewClick}>Run Preview</button> | ||
| {previewResult !== null && ( | ||
| <div> | ||
| <p>Preview Result: {previewResult}</p> | ||
| </div> | ||
| )} | ||
| </div> | ||
| ); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,58 @@ | ||
| import { createContext, FC, PropsWithChildren, useContext, useEffect, useState } from "react"; | ||
| import "./wasm_exec.js"; | ||
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| export interface PreviewContextValue { | ||
| isWasmLoaded: boolean; | ||
| preview?: GoPreviewDef; | ||
| } | ||
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| export const PreviewContext = createContext<PreviewContextValue | undefined>( | ||
| undefined, | ||
| ); | ||
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| export const PreviewProvider: FC<PropsWithChildren> = ({ children }) => { | ||
| const [isWasmLoaded, setIsWasmLoaded] = useState(false); | ||
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| // useEffect hook to load WebAssembly when the component mounts | ||
| useEffect(() => { | ||
| // Function to asynchronously load WebAssembly | ||
| async function loadWasm(): Promise<void> { | ||
| // Create a new Go object | ||
| const goWasm = new window.Go(); | ||
| const result = await WebAssembly.instantiateStreaming( | ||
| // Fetch and instantiate the main.wasm file | ||
| fetch('build/preview.wasm'), | ||
| // Provide the import object to Go for communication with JavaScript | ||
| goWasm.importObject | ||
| ); | ||
| // Run the Go program with the WebAssembly instance | ||
| goWasm.run(result.instance); | ||
| setIsWasmLoaded(true); | ||
| } | ||
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| loadWasm(); | ||
| }, []); | ||
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| return ( | ||
| <PreviewContext.Provider | ||
| value={{ | ||
| isWasmLoaded, | ||
| preview: window.go_preview, | ||
| }} | ||
| > | ||
| {children} | ||
| </PreviewContext.Provider> | ||
| ); | ||
| } | ||
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| export const usePreview = (): PreviewContextValue => { | ||
| const context = useContext(PreviewContext); | ||
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| if (!context) { | ||
| throw new Error("usePreview should be used inside of <PreviewProvider />"); | ||
| } | ||
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| return context; | ||
| }; |
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add a trailing newline to appease github (and me) pls