const HELPER_LIBRARY = "@budibase/handlebars-helpers" const helpers = require(HELPER_LIBRARY) const { HelperFunctionBuiltin } = require("../src/helpers/constants") const fs = require("fs") const doctrine = require("doctrine") const marked = require("marked") const DIRECTORY = fs.existsSync("node_modules") ? "." : ".." const FILENAME = `${DIRECTORY}/manifest.json` /** * full list of supported helpers can be found here: * https://github.com/helpers/handlebars-helpers */ const COLLECTIONS = ["math", "array", "number", "url", "string", "comparison"] const outputJSON = {} function fixSpecialCases(name, obj) { const args = obj.args if (name === "ifNth") { args[0] = "a" args[1] = "b" } if (name === "eachIndex") { obj.description = "Iterates the array, listing an item and the index of it." } if (name === "toFloat") { obj.description = "Convert input to a float." } if (name === "toInt") { obj.description = "Convert input to an integer." } return obj } function lookForward(lines, funcLines, idx) { const funcLen = funcLines.length for (let i = idx, j = 0; i < idx + funcLen; ++i, j++) { if (!lines[i].includes(funcLines[j])) { return false } } return true } function getCommentInfo(file, func) { const lines = file.split("\n") const funcLines = func.split("\n") let comment = null for (let idx = 0; idx < lines.length; ++idx) { // from here work back until we have the comment if (lookForward(lines, funcLines, idx)) { let fromIdx = idx let start = 0, end = 0 do { if (lines[fromIdx].includes("*/")) { end = fromIdx } else if (lines[fromIdx].includes("/*")) { start = fromIdx } if (start && end) { break } fromIdx-- } while (fromIdx > 0) comment = lines.slice(start, end + 1).join("\n") } } if (comment == null) { return { description: "" } } const docs = doctrine.parse(comment, { unwrap: true }) // some hacky fixes docs.description = docs.description.replace(/\n/g, " ") docs.description = docs.description.replace(/[ ]{2,}/g, " ") docs.description = docs.description.replace(/is is/g, "is") const examples = docs.tags .filter(el => el.title === "example") .map(el => el.description) const blocks = docs.description.split("```") if (examples.length > 0) { docs.example = examples.join(" ") } docs.description = blocks[0].trim() return docs } /** * This script is very specific to purpose, parsing the handlebars-helpers files to attempt to get information about them. */ function run() { const foundNames = [] for (let collection of COLLECTIONS) { const collectionFile = fs.readFileSync( `${DIRECTORY}/node_modules/${HELPER_LIBRARY}/lib/${collection}.js`, "utf8" ) const collectionInfo = {} // collect information about helper let hbsHelperInfo = helpers[collection]() for (let entry of Object.entries(hbsHelperInfo)) { const name = entry[0] // skip built in functions and ones seen already if ( HelperFunctionBuiltin.indexOf(name) !== -1 || foundNames.indexOf(name) !== -1 ) { continue } foundNames.push(name) // this is ridiculous, but it parse the function header const fnc = entry[1].toString() const jsDocInfo = getCommentInfo(collectionFile, fnc) let args = jsDocInfo.tags .filter(tag => tag.title === "param") .map( tag => tag.description && tag.description .replace(/`/g, "") .split(" ")[0] .trim() ) collectionInfo[name] = fixSpecialCases(name, { args, numArgs: args.length, example: jsDocInfo.example || undefined, description: jsDocInfo.description, }) } outputJSON[collection] = collectionInfo } // add the date helper outputJSON["date"] = { date: { args: ["datetime", "format"], numArgs: 2, example: '{{date now "YYYY"}}', description: "Format a date using moment.js data formatting.", }, } // convert all markdown to HTML for (let collection of Object.values(outputJSON)) { for (let helper of Object.values(collection)) { helper.description = marked(helper.description) } } fs.writeFileSync(FILENAME, JSON.stringify(outputJSON, null, 2)) } run()