mirror of
https://github.com/discourse/discourse.git
synced 2024-12-01 15:16:04 +08:00
25fabccd59
Ember CLI will automatically run babel transformations in parallel when the config is 'serializable', and can therefore be applied in multiple processes automatically. If any plugin is defined in an unserializable way, parallelisation will be disabled. Our discourse-widget-hbs transformer was causing parallelisation to be disabled. This commit fixes that, and also enables the throwUnlessParallelizable flag so that we catch this kind of issue more easily in future. This commit also refactors our deprecation silencing system into its own file, and uses a fake babel plugin to ensure deprecations are silenced in babel worker processes. In our GitHub CI jobs, this doubles the speed of ember builds (1m30s -> 45s). It should also improve production deploy times, and cold-start dev builds.
379 lines
10 KiB
JavaScript
379 lines
10 KiB
JavaScript
function resolve(path) {
|
|
if (path.startsWith("settings") || path.startsWith("transformed")) {
|
|
return `this.${path}`;
|
|
}
|
|
return path;
|
|
}
|
|
|
|
function sexpValue(value) {
|
|
if (!value) {
|
|
return;
|
|
}
|
|
|
|
let pValue = value.original;
|
|
if (value.type === "StringLiteral") {
|
|
return JSON.stringify(pValue);
|
|
} else if (value.type === "SubExpression") {
|
|
return sexp(value);
|
|
}
|
|
return resolve(pValue);
|
|
}
|
|
|
|
function pairsToObj(pairs) {
|
|
let result = [];
|
|
|
|
pairs.forEach((p) => {
|
|
result.push(`"${p.key}": ${sexpValue(p.value)}`);
|
|
});
|
|
|
|
return `{ ${result.join(", ")} }`;
|
|
}
|
|
|
|
function i18n(node) {
|
|
let key = sexpValue(node.params[0]);
|
|
|
|
let hash = node.hash;
|
|
if (hash.pairs.length) {
|
|
return `I18n.t(${key}, ${pairsToObj(hash.pairs)})`;
|
|
}
|
|
|
|
return `I18n.t(${key})`;
|
|
}
|
|
|
|
function sexp(value) {
|
|
if (value.path.original === "hash") {
|
|
return pairsToObj(value.hash.pairs);
|
|
}
|
|
|
|
if (value.path.original === "concat") {
|
|
let result = [];
|
|
value.params.forEach((p) => {
|
|
result.push(sexpValue(p));
|
|
});
|
|
return result.join(" + ");
|
|
}
|
|
|
|
if (value.path.original === "i18n") {
|
|
return i18n(value);
|
|
}
|
|
}
|
|
|
|
function valueOf(value) {
|
|
if (value.type === "SubExpression") {
|
|
return sexp(value);
|
|
} else if (value.type === "PathExpression") {
|
|
return value.original;
|
|
} else if (value.type === "StringLiteral") {
|
|
return JSON.stringify(value.value);
|
|
}
|
|
}
|
|
|
|
function argValue(arg) {
|
|
return valueOf(arg.value);
|
|
}
|
|
|
|
function useHelper(state, name) {
|
|
let id = state.helpersUsed[name];
|
|
if (!id) {
|
|
id = ++state.helperNumber;
|
|
state.helpersUsed[name] = id;
|
|
}
|
|
return `__h${id}`;
|
|
}
|
|
|
|
function mustacheValue(node, state) {
|
|
let path = node.path.original;
|
|
|
|
switch (path) {
|
|
case "attach":
|
|
let widgetName = argValue(
|
|
node.hash.pairs.find((p) => p.key === "widget")
|
|
);
|
|
|
|
const attrs = node.hash.pairs.find((p) => p.key === "attrs");
|
|
const opts = node.hash.pairs.find((p) => p.key === "opts");
|
|
const otherOpts = node.hash.pairs.find((p) => p.key === "otherOpts");
|
|
|
|
return `this.attach(${widgetName}, ${attrs ? argValue(attrs) : attrs}, ${
|
|
opts ? argValue(opts) : opts
|
|
}, ${otherOpts ? argValue(otherOpts) : otherOpts})`;
|
|
|
|
break;
|
|
case "yield":
|
|
return `this.attrs.contents()`;
|
|
break;
|
|
case "i18n":
|
|
return i18n(node);
|
|
break;
|
|
case "avatar":
|
|
let template = argValue(
|
|
node.hash.pairs.find((p) => p.key === "template")
|
|
);
|
|
let username = argValue(
|
|
node.hash.pairs.find((p) => p.key === "username")
|
|
);
|
|
let size = argValue(node.hash.pairs.find((p) => p.key === "size"));
|
|
return `${useHelper(
|
|
state,
|
|
"avatar"
|
|
)}(${size}, { template: ${template}, username: ${username} })`;
|
|
break;
|
|
case "date":
|
|
return `${useHelper(state, "dateNode")}(${valueOf(node.params[0])})`;
|
|
break;
|
|
case "d-icon":
|
|
return `${useHelper(state, "iconNode")}(${valueOf(node.params[0])})`;
|
|
break;
|
|
default:
|
|
// Shortcut: If our mustache has hash arguments, we can assume it's attaching.
|
|
// For example `{{home-logo count=123}}` can become `this.attach('home-logo, { "count": 123 });`
|
|
let hash = node.hash;
|
|
if (hash.pairs.length) {
|
|
let widgetString = JSON.stringify(path);
|
|
// magic: support applying of attrs. This is commonly done like `{{home-logo attrs=attrs}}`
|
|
let firstPair = hash.pairs[0];
|
|
if (firstPair.key === "attrs") {
|
|
return `this.attach(${widgetString}, ${firstPair.value.original})`;
|
|
}
|
|
|
|
return `this.attach(${widgetString}, ${pairsToObj(hash.pairs)})`;
|
|
}
|
|
|
|
if (node.escaped) {
|
|
return `${resolve(path)}`;
|
|
} else {
|
|
return `new ${useHelper(state, "rawHtml")}({ html: '<span>' + ${resolve(
|
|
path
|
|
)} + '</span>'})`;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
class Compiler {
|
|
constructor(ast) {
|
|
this.idx = 0;
|
|
this.ast = ast;
|
|
|
|
this.state = {
|
|
helpersUsed: {},
|
|
helperNumber: 0,
|
|
};
|
|
}
|
|
|
|
newAcc() {
|
|
return `_a${this.idx++}`;
|
|
}
|
|
|
|
processNode(parentAcc, node) {
|
|
let instructions = [];
|
|
let innerAcc;
|
|
|
|
switch (node.type) {
|
|
case "Program":
|
|
case "Template":
|
|
node.body.forEach((bodyNode) => {
|
|
instructions = instructions.concat(
|
|
this.processNode(parentAcc, bodyNode)
|
|
);
|
|
});
|
|
break;
|
|
case "ElementNode":
|
|
innerAcc = this.newAcc();
|
|
instructions.push(`var ${innerAcc} = [];`);
|
|
node.children.forEach((child) => {
|
|
instructions = instructions.concat(this.processNode(innerAcc, child));
|
|
});
|
|
|
|
if (node.attributes.length) {
|
|
let attributes = [];
|
|
let properties = [];
|
|
|
|
node.attributes.forEach((a) => {
|
|
const name = a.name;
|
|
const value =
|
|
a.value.type === "MustacheStatement"
|
|
? mustacheValue(a.value, this.state)
|
|
: `"${a.value.chars}"`;
|
|
|
|
if (a.name === "class") {
|
|
properties.push(`"className":${value}`);
|
|
} else {
|
|
attributes.push(`"${name}":${value}`);
|
|
}
|
|
});
|
|
|
|
properties.push(`"attributes":{${attributes.join(", ")}}`);
|
|
const propertiesString = `{${properties.join(", ")}}`;
|
|
|
|
instructions.push(
|
|
`${parentAcc}.push(virtualDom.h('${node.tag}', ${propertiesString}, ${innerAcc}));`
|
|
);
|
|
} else {
|
|
instructions.push(
|
|
`${parentAcc}.push(virtualDom.h('${node.tag}', ${innerAcc}));`
|
|
);
|
|
}
|
|
|
|
break;
|
|
|
|
case "TextNode":
|
|
return `${parentAcc}.push(${JSON.stringify(node.chars)});`;
|
|
|
|
case "MustacheStatement":
|
|
const value = mustacheValue(node, this.state);
|
|
if (value) {
|
|
instructions.push(`${parentAcc}.push(${value});`);
|
|
}
|
|
break;
|
|
case "BlockStatement":
|
|
let negate = "";
|
|
|
|
switch (node.path.original) {
|
|
case "unless":
|
|
negate = "!";
|
|
case "if":
|
|
instructions.push(
|
|
`if (${negate}${resolve(node.params[0].original)}) {`
|
|
);
|
|
node.program.body.forEach((child) => {
|
|
instructions = instructions.concat(
|
|
this.processNode(parentAcc, child)
|
|
);
|
|
});
|
|
|
|
if (node.inverse) {
|
|
instructions.push(`} else {`);
|
|
node.inverse.body.forEach((child) => {
|
|
instructions = instructions.concat(
|
|
this.processNode(parentAcc, child)
|
|
);
|
|
});
|
|
}
|
|
instructions.push(`}`);
|
|
break;
|
|
case "each":
|
|
const collection = resolve(node.params[0].original);
|
|
instructions.push(`if (${collection} && ${collection}.length) {`);
|
|
instructions.push(
|
|
` ${collection}.forEach(${node.program.blockParams[0]} => {`
|
|
);
|
|
node.program.body.forEach((child) => {
|
|
instructions = instructions.concat(
|
|
this.processNode(parentAcc, child)
|
|
);
|
|
});
|
|
instructions.push(` });`);
|
|
instructions.push("}");
|
|
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return instructions.join("\n");
|
|
}
|
|
|
|
compile() {
|
|
return this.processNode("_r", this.ast);
|
|
}
|
|
}
|
|
|
|
// eslint-disable-next-line no-undef
|
|
const loader = typeof Ember !== "undefined" ? Ember.__loader.require : require;
|
|
|
|
function compile(template, glimmer) {
|
|
if (!glimmer) {
|
|
glimmer = loader("@glimmer/syntax");
|
|
}
|
|
const compiled = glimmer.preprocess(template);
|
|
const compiler = new Compiler(compiled);
|
|
|
|
let code = compiler.compile();
|
|
|
|
let imports = "";
|
|
|
|
Object.keys(compiler.state.helpersUsed).forEach((h) => {
|
|
let id = compiler.state.helpersUsed[h];
|
|
imports += `var __h${id} = __widget_helpers.${h}; `;
|
|
});
|
|
|
|
return `function(attrs, state) { ${imports}var _r = [];\n${code}\nreturn _r; }`;
|
|
}
|
|
|
|
exports.compile = compile;
|
|
|
|
function error(path, state, msg) {
|
|
const filename = state.file.opts.filename;
|
|
return path.replaceWithSourceString(
|
|
`function() { console.error("${filename}: ${msg}"); }`
|
|
);
|
|
}
|
|
|
|
const WidgetHbsCompiler = function (babel) {
|
|
let t = babel.types;
|
|
return {
|
|
visitor: {
|
|
ImportDeclaration(path, state) {
|
|
let node = path.node;
|
|
if (
|
|
t.isLiteral(node.source, { value: "discourse/widgets/hbs-compiler" })
|
|
) {
|
|
let first = node.specifiers && node.specifiers[0];
|
|
if (!t.isImportDefaultSpecifier(first)) {
|
|
let input = state.file.code;
|
|
let usedImportStatement = input.slice(node.start, node.end);
|
|
let msg = `Only \`import hbs from 'discourse/widgets/hbs-compiler'\` is supported. You used: \`${usedImportStatement}\``;
|
|
throw path.buildCodeFrameError(msg);
|
|
}
|
|
|
|
state.importId =
|
|
state.importId ||
|
|
path.scope.generateUidIdentifierBasedOnNode(path.node.id);
|
|
path.scope.rename(first.local.name, state.importId.name);
|
|
path.remove();
|
|
}
|
|
},
|
|
|
|
TaggedTemplateExpression(path, state) {
|
|
if (!state.importId) {
|
|
return;
|
|
}
|
|
|
|
let tagPath = path.get("tag");
|
|
if (tagPath.node.name !== state.importId.name) {
|
|
return;
|
|
}
|
|
|
|
if (path.node.quasi.expressions.length) {
|
|
return error(
|
|
path,
|
|
state,
|
|
"placeholders inside a tagged template string are not supported"
|
|
);
|
|
}
|
|
|
|
let template = path.node.quasi.quasis
|
|
.map((quasi) => quasi.value.cooked)
|
|
.join("");
|
|
|
|
try {
|
|
path.replaceWithSourceString(
|
|
compile(template, WidgetHbsCompiler.glimmer)
|
|
);
|
|
} catch (e) {
|
|
// eslint-disable-next-line no-console
|
|
console.error("widget hbs error", e.toString());
|
|
return error(path, state, e.toString());
|
|
}
|
|
},
|
|
},
|
|
};
|
|
};
|
|
|
|
WidgetHbsCompiler.cacheKey = () => "discourse-widget-hbs";
|
|
|
|
exports.WidgetHbsCompiler = WidgetHbsCompiler;
|