Last active
October 4, 2023 08:47
-
-
Save Namaskar-1F64F/45182ccb0075615d54b198da144e9ec3 to your computer and use it in GitHub Desktop.
[pre-build] Optimizations for IPFS websites
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const fs = require("fs"); | |
| const path = require("path"); | |
| const jscodeshift = require("jscodeshift"); | |
| const updatePackageJson = function (fileInfo) { | |
| const json = JSON.parse(fileInfo.source); | |
| // Check if the package is using react-scripts | |
| const usesReactScripts = | |
| (json.dependencies && json.dependencies["react-scripts"]) || | |
| (json.devDependencies && json.devDependencies["react-scripts"]); | |
| if (usesReactScripts) { | |
| json.homepage = "."; | |
| } | |
| return JSON.stringify(json, null, 2); | |
| }; | |
| const updateNextConfig = function (fileInfo, api) { | |
| const j = api.jscodeshift; | |
| const root = j(fileInfo.source); | |
| function addTrailingSlash(objExpression) { | |
| let trailingSlashObjectFound = false; | |
| objExpression.properties.forEach((property) => { | |
| if (property.key.name === "trailingSlash") { | |
| trailingSlashObjectFound = true; | |
| } | |
| }); | |
| if (!trailingSlashObjectFound) { | |
| objExpression.properties.push( | |
| j.property("init", j.identifier("trailingSlash"), j.literal(true)) | |
| ); | |
| } | |
| } | |
| function addOutputExport(objExpression) { | |
| let outputObjectFound = false; | |
| objExpression.properties.forEach((property) => { | |
| if (property.key.name === "output") { | |
| outputObjectFound = true; | |
| property.value.value = 'export'; | |
| } | |
| }); | |
| if (!outputObjectFound) { | |
| objExpression.properties.push( | |
| j.property("init", j.identifier("output"), j.literal("export")) | |
| ); | |
| } | |
| } | |
| function updateImagesObject(objExpression) { | |
| let imagesObjectFound = false; | |
| objExpression.properties.forEach((property) => { | |
| if (property.key.name === "images") { | |
| imagesObjectFound = true; | |
| let unoptimizedPropertyFound = false; | |
| property.value.properties.forEach((prop) => { | |
| if (prop.key.name === "unoptimized") { | |
| unoptimizedPropertyFound = true; | |
| prop.value.value = true; | |
| } | |
| }); | |
| if (!unoptimizedPropertyFound) { | |
| property.value.properties.push( | |
| j.property("init", j.identifier("unoptimized"), j.literal(true)) | |
| ); | |
| } | |
| } | |
| }); | |
| if (!imagesObjectFound) { | |
| objExpression.properties.push( | |
| j.property( | |
| "init", | |
| j.identifier("images"), | |
| j.objectExpression([ | |
| j.property("init", j.identifier("unoptimized"), j.literal(true)), | |
| ]) | |
| ) | |
| ); | |
| } | |
| } | |
| // Case 1: Direct assignment to module.exports | |
| root | |
| .find(j.AssignmentExpression) | |
| .filter( | |
| (path) => | |
| path.value.left.type === "MemberExpression" && | |
| path.value.left.object.name === "module" && | |
| path.value.left.property.name === "exports" && | |
| (path.value.right.type === "ObjectExpression" || | |
| (path.value.right.type === "CallExpression" && | |
| path.value.right.arguments.length === 1 && | |
| path.value.right.arguments[0].type === "ObjectExpression")) | |
| ) | |
| .forEach((path) => { | |
| if (path.value.right.type === "ObjectExpression") { | |
| updateImagesObject(path.value.right); | |
| addTrailingSlash(path.value.right); | |
| addOutputExport(path.value.right); | |
| } else if ( | |
| path.value.right.type === "CallExpression" && | |
| path.value.right.arguments.length === 1 && | |
| path.value.right.arguments[0].type === "ObjectExpression" | |
| ) { | |
| updateImagesObject(path.value.right.arguments[0]); | |
| addTrailingSlash(path.value.right.arguments[0]); | |
| addOutputExport(path.value.right.arguments[0]); | |
| } | |
| }); | |
| // Case 2: Separate nextConfig object | |
| root | |
| .find(j.VariableDeclarator) | |
| .filter( | |
| (path) => | |
| path.value.id.type === "Identifier" && | |
| path.value.id.name === "nextConfig" && | |
| path.value.init.type === "ObjectExpression" | |
| ) | |
| .forEach((path) => { | |
| updateImagesObject(path.value.init); | |
| addTrailingSlash(path.value.init); | |
| addOutputExport(path.value.init); | |
| }); | |
| return root.toSource({ trailingComma: true }); | |
| }; | |
| const TRANSFORMATIONS = { | |
| "../next.config.js": updateNextConfig, | |
| "../next.config.mjs": updateNextConfig, | |
| "../package.json": updatePackageJson, | |
| }; | |
| const simpleDiff = (oldSource, newSource) => { | |
| const oldLines = oldSource.split("\n"); | |
| const newLines = newSource.split("\n"); | |
| const diffLines = []; | |
| for (let i = 0; i < Math.max(oldLines.length, newLines.length); i++) { | |
| if (oldLines[i] !== newLines[i]) { | |
| diffLines.push({ | |
| lineNumber: i + 1, | |
| oldLine: oldLines[i] || "", | |
| newLine: newLines[i] || "", | |
| }); | |
| } | |
| } | |
| return diffLines; | |
| }; | |
| const applyTransformations = () => { | |
| for (const [fileName, transform] of Object.entries(TRANSFORMATIONS)) { | |
| const fullPath = path.resolve(fileName); | |
| if (fs.existsSync(fullPath)) { | |
| console.log(`attempting transform on ${fullPath}`); | |
| const fileInfo = { | |
| path: fullPath, | |
| source: fs.readFileSync(fullPath, "utf8"), | |
| }; | |
| let newSource; | |
| if (fullPath.endsWith("package.json")) { | |
| newSource = updatePackageJson(fileInfo); | |
| } else { | |
| const api = { jscodeshift }; | |
| newSource = transform(fileInfo, api); | |
| } | |
| const changes = simpleDiff(fileInfo.source, newSource); | |
| if (changes.length > 0) { | |
| console.log(`Changes in ${fullPath}:`); | |
| changes.forEach((change) => { | |
| console.log("- " + change.oldLine); | |
| console.log("+ " + change.newLine); | |
| }); | |
| } | |
| fs.writeFileSync(fullPath, newSource, "utf8"); | |
| } else { | |
| console.log(`skipping transform on ${fullPath} as it was not found`); | |
| } | |
| } | |
| }; | |
| applyTransformations(); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment