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While very useful on its own (and combined with the passthrough render hooks), this also serves as a proof of concept of using WASI (WebAssembly System Interface) modules in Hugo. This will be marked _experimental_ in the documentation. Not because it will be removed or changed in a dramatic way, but we need to think a little more how to best set up/configure similar services, define where these WASM files gets stored, maybe we can allow user provided WASM files plugins via Hugo Modules mounts etc. See these issues for more context: * #12736 * #12737 See #11927
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# TODO1 clean up when done. | ||
go generate ./gen | ||
javy compile js/greet.bundle.js -d -o wasm/greet.wasm | ||
javy compile js/renderkatex.bundle.js -d -o wasm/renderkatex.wasm | ||
touch warpc_test.go |
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//go:generate go run main.go | ||
package main | ||
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import ( | ||
"fmt" | ||
"log" | ||
"os" | ||
"path/filepath" | ||
"strings" | ||
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"github.com/evanw/esbuild/pkg/api" | ||
) | ||
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var scripts = []string{ | ||
"greet.js", | ||
"renderkatex.js", | ||
} | ||
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func main() { | ||
for _, script := range scripts { | ||
filename := filepath.Join("../js", script) | ||
err := buildJSBundle(filename) | ||
if err != nil { | ||
log.Fatal(err) | ||
} | ||
} | ||
} | ||
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func buildJSBundle(filename string) error { | ||
minify := true | ||
result := api.Build( | ||
api.BuildOptions{ | ||
EntryPoints: []string{filename}, | ||
Bundle: true, | ||
MinifyWhitespace: minify, | ||
MinifyIdentifiers: minify, | ||
MinifySyntax: minify, | ||
Target: api.ES2020, | ||
Outfile: strings.Replace(filename, ".js", ".bundle.js", 1), | ||
SourceRoot: "../js", | ||
}) | ||
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if len(result.Errors) > 0 { | ||
return fmt.Errorf("build failed: %v", result.Errors) | ||
} | ||
if len(result.OutputFiles) != 1 { | ||
return fmt.Errorf("expected 1 output file, got %d", len(result.OutputFiles)) | ||
} | ||
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of := result.OutputFiles[0] | ||
if err := os.WriteFile(filepath.FromSlash(of.Path), of.Contents, 0o644); err != nil { | ||
return fmt.Errorf("write file failed: %v", err) | ||
} | ||
return nil | ||
} |
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node_modules/ | ||
package-lock.json |
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// Read JSONL from stdin. | ||
export function readInput(handle) { | ||
const buffSize = 1024; | ||
let currentLine = []; | ||
const buffer = new Uint8Array(buffSize); | ||
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// Read all the available bytes | ||
while (true) { | ||
// Stdin file descriptor | ||
const fd = 0; | ||
let bytesRead = 0; | ||
try { | ||
bytesRead = Javy.IO.readSync(fd, buffer); | ||
} catch (e) { | ||
// IO.readSync fails with os error 29 when stdin closes. | ||
if (e.message.includes('os error 29')) { | ||
break; | ||
} | ||
throw new Error('Error reading from stdin'); | ||
} | ||
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if (bytesRead < 0) { | ||
throw new Error('Error reading from stdin'); | ||
break; | ||
} | ||
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if (bytesRead === 0) { | ||
break; | ||
} | ||
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currentLine = [...currentLine, ...buffer.subarray(0, bytesRead)]; | ||
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// Split array into chunks by newline. | ||
let i = 0; | ||
for (let j = 0; i < currentLine.length; i++) { | ||
if (currentLine[i] === 10) { | ||
const chunk = currentLine.splice(j, i + 1); | ||
const arr = new Uint8Array(chunk); | ||
const json = JSON.parse(new TextDecoder().decode(arr)); | ||
handle(json); | ||
j = i + 1; | ||
} | ||
} | ||
// Remove processed data. | ||
currentLine = currentLine.slice(i); | ||
} | ||
} | ||
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// Write JSONL to stdout | ||
export function writeOutput(output) { | ||
const encodedOutput = new TextEncoder().encode(JSON.stringify(output) + '\n'); | ||
const buffer = new Uint8Array(encodedOutput); | ||
// Stdout file descriptor | ||
const fd = 1; | ||
Javy.IO.writeSync(fd, buffer); | ||
} |
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import { readInput, writeOutput } from './common'; | ||
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const greet = function (input) { | ||
writeOutput({ header: input.header, data: { greeting: 'Hello ' + input.data.name + '!' } }); | ||
}; | ||
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console.log('Greet module loaded'); | ||
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readInput(greet); |
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{ | ||
"name": "js", | ||
"version": "1.0.0", | ||
"main": "greet.js", | ||
"scripts": { | ||
"test": "echo \"Error: no test specified\" && exit 1" | ||
}, | ||
"author": "", | ||
"license": "ISC", | ||
"description": "", | ||
"devDependencies": { | ||
"katex": "^0.16.11" | ||
} | ||
} |
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