/twin-macro-codemod.ts Secret
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April 13, 2023 22:03
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Twin macro codemod
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import { NodePath } from "@babel/traverse"; | |
import { | |
Expression, | |
JSXOpeningElement, | |
SpreadElement, | |
TaggedTemplateExpression, | |
StringLiteral, | |
Identifier, | |
ImportDeclaration, | |
} from "@babel/types"; | |
import { defineCodemod } from "@codemod/cli"; | |
export default defineCodemod(({ t, m }) => { | |
const twimImport = m.importDeclaration( | |
undefined, | |
m.stringLiteral("twin.macro"), | |
); | |
const twimTemplate = m.taggedTemplateExpression(m.identifier("tw")); | |
const twStyle = m.identifier("TwStyle"); | |
const tw = m.taggedTemplateExpression(m.memberExpression(m.identifier("tw"))); | |
return { | |
visitor: { | |
JSXOpeningElement(path: NodePath<JSXOpeningElement>) { | |
const tw = findAttrbutes(path, "tw"); | |
const css = findAttrbutes(path, "css"); | |
const className = findAttrbutes(path, "className"); | |
const elements: Array<Expression | SpreadElement | null> = []; | |
if ( | |
tw && | |
tw.type === "JSXAttribute" && | |
tw.value?.type === "StringLiteral" | |
) { | |
elements.push(tw.value); | |
path.node.attributes = path.node.attributes.filter(n => n !== tw); | |
} | |
if ( | |
className && | |
className.type === "JSXAttribute" && | |
className.value?.type === "StringLiteral" | |
) { | |
elements.push(className.value); | |
path.node.attributes = path.node.attributes.filter( | |
n => n !== className, | |
); | |
} | |
if ( | |
css && | |
css.type === "JSXAttribute" && | |
css.value?.type === "JSXExpressionContainer" && | |
css.value.expression.type === "ArrayExpression" | |
) { | |
elements.push(...css.value.expression.elements); | |
path.node.attributes = path.node.attributes.filter(n => n !== css); | |
} | |
function isStringLiteral( | |
e: Expression | SpreadElement | null, | |
): e is StringLiteral { | |
return e?.type === "StringLiteral"; | |
} | |
const stringLiterals = elements.filter(e => | |
isStringLiteral(e), | |
) as StringLiteral[]; | |
const nonStringLiterals = elements.filter(e => !isStringLiteral(e)); | |
const nonNullElements: Array<Expression | SpreadElement> = []; | |
if (stringLiterals.length > 0) { | |
const literal = stringLiterals.map(l => l.value).join(" "); | |
nonNullElements.push(t.stringLiteral(convertClasses(literal))); | |
} | |
nonNullElements.push( | |
...(nonStringLiterals.filter(Boolean) as Array< | |
Expression | SpreadElement | |
>), | |
); | |
const [first] = nonNullElements; | |
if (nonNullElements.length === 1 && first.type === "StringLiteral") { | |
path.node.attributes.push( | |
t.jsxAttribute(t.jsxIdentifier("className"), first), | |
); | |
} else if ( | |
nonNullElements.length === 1 && | |
first.type !== "SpreadElement" | |
) { | |
path.node.attributes.push( | |
t.jsxAttribute( | |
t.jsxIdentifier("className"), | |
t.jsxExpressionContainer(first), | |
), | |
); | |
} else if (nonNullElements.length > 0) { | |
path.node.attributes.push( | |
t.jsxAttribute( | |
t.jsxIdentifier("className"), | |
t.jsxExpressionContainer( | |
t.callExpression(t.identifier("classNames"), nonNullElements), | |
), | |
), | |
); | |
} | |
}, | |
Identifier(path: NodePath<Identifier>) { | |
m.match(twStyle, {}, path.node, info => { | |
// Replaces "TwStyle" with "styled" | |
if (path.parent.type === "ImportSpecifier") return; | |
path.replaceWith(t.identifier("string") as any); | |
}); | |
}, | |
ImportDeclaration(path: NodePath<ImportDeclaration>) { | |
m.match(twimImport, {}, path.node, info => { | |
// Remove `import "twin.macro";` | |
path.remove(); | |
}); | |
}, | |
TaggedTemplateExpression(path: NodePath<TaggedTemplateExpression>) { | |
m.match(tw, {}, path.node, info => { | |
// Replaces "tw.div`text-blue-500`;" with "html.div`text-blue-500`;" | |
if (path.node.tag.type === "MemberExpression") { | |
path.node.tag.object = t.identifier("html"); | |
} | |
}); | |
m.match(twimTemplate, {}, path.node, info => { | |
// Replaces "tw`text-blue-500`;" with just "text-blue-500" | |
if (path.node.quasi.expressions.length > 0) return; | |
const value = path.node.quasi.quasis[0].value.raw; | |
path.replaceWith(t.stringLiteral(convertClasses(value)) as any); | |
}); | |
}, | |
}, | |
}; | |
}); | |
function findAttrbutes(path: NodePath<JSXOpeningElement>, name: string) { | |
return path.node.attributes.find( | |
attr => attr.type === "JSXAttribute" && attr.name.name === name, | |
); | |
} | |
function convertClasses(value) { | |
const arbitrary = value | |
.replace(/\s+/g, " ") | |
.replace(/(\S+)\[(.+?)\]/g, v => v.replace(/\s+/g, "_")) | |
.replaceAll("background[linear-gradient", "bg-[linear-gradient"); | |
return arbitrary | |
.replace(/(xs|sm|md|lg|xl|2xl|3xl):\((.+?)\)/g, (_, a, b) => { | |
return b | |
.split(/\s+/) | |
.map(c => `${a}:${c}`) | |
.join(" "); | |
}) | |
.trim(); | |
} |
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