* Fix paid organization creation limit * Clarify stack PR URL reporting * Clarify clickable stack PR links
Showing the changes to scripts/oxlint-plugin-executor (1 of 14 files). Show all
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| 1 | +import { getPropertyName, isIdentifier, unwrapExpression } from "../utils.js"; | |
| 2 | + | |
| 3 | +const message = | |
| 4 | + "Use Predicate.isNotNull/isNotUndefined/isNotNullish from effect instead of hand-rolled nullish predicates."; | |
| 5 | + | |
| 6 | +const nullishOperators = new Set(["!==", "!=", "===", "=="]); | |
| 7 | + | |
| 8 | +const isNullLiteral = (node) => node?.type === "Literal" && node.value === null; | |
| 9 | +const isUndefinedIdentifier = (node) => isIdentifier(node, "undefined"); | |
| 10 | +const isNullishLiteral = (node) => isNullLiteral(node) || isUndefinedIdentifier(node); | |
| 11 | + | |
| 12 | +const isNullishComparison = (node, identifierName) => { | |
| 13 | + const expression = unwrapExpression(node); | |
| 14 | + if (expression?.type !== "BinaryExpression" || !nullishOperators.has(expression.operator)) { | |
| 15 | + return false; | |
| 16 | + } | |
| 17 | + | |
| 18 | + const left = unwrapExpression(expression.left); | |
| 19 | + const right = unwrapExpression(expression.right); | |
| 20 | + return ( | |
| 21 | + (isIdentifier(left, identifierName) && isNullishLiteral(right)) || | |
| 22 | + (isIdentifier(right, identifierName) && isNullishLiteral(left)) | |
| 23 | + ); | |
| 24 | +}; | |
| 25 | + | |
| 26 | +const getSingleIdentifierParamName = (params) => { | |
| 27 | + if (params.length !== 1) return undefined; | |
| 28 | + const param = unwrapExpression(params[0]); | |
| 29 | + return param?.type === "Identifier" ? param.name : undefined; | |
| 30 | +}; | |
| 31 | + | |
| 32 | +const isNullishPredicateFunction = (node) => { | |
| 33 | + const name = getSingleIdentifierParamName(node.params ?? []); | |
| 34 | + return name !== undefined && isNullishComparison(node.body, name); | |
| 35 | +}; | |
| 36 | + | |
| 37 | +const isFilterCall = (node) => { | |
| 38 | + const callee = unwrapExpression(node.callee); | |
| 39 | + return callee?.type === "MemberExpression" && getPropertyName(callee.property) === "filter"; | |
| 40 | +}; | |
| 41 | + | |
| 42 | +const importsEffect = (node) => { | |
| 43 | + const source = node.source; | |
| 44 | + return source?.type === "Literal" && source.value === "effect"; | |
| 45 | +}; | |
| 46 | + | |
| 47 | +export default { | |
| 48 | + meta: { | |
| 49 | + type: "problem", | |
| 50 | + docs: { | |
| 51 | + description: message, | |
| 52 | + }, | |
| 53 | + }, | |
| 54 | + create(context) { | |
| 55 | + let hasEffectImport = false; | |
| 56 | + | |
| 57 | + return { | |
| 58 | + ImportDeclaration(node) { | |
| 59 | + if (importsEffect(node)) { | |
| 60 | + hasEffectImport = true; | |
| 61 | + } | |
| 62 | + }, | |
| 63 | + VariableDeclarator(node) { | |
| 64 | + if (!hasEffectImport) return; | |
| 65 | + const init = unwrapExpression(node.init); | |
| 66 | + if (init?.type === "ArrowFunctionExpression" && isNullishPredicateFunction(init)) { | |
| 67 | + context.report({ node: init, message }); | |
| 68 | + } | |
| 69 | + }, | |
| 70 | + FunctionDeclaration(node) { | |
| 71 | + if (!hasEffectImport) return; | |
| 72 | + if (isNullishPredicateFunction(node)) { | |
| 73 | + context.report({ node, message }); | |
| 74 | + } | |
| 75 | + }, | |
| 76 | + CallExpression(node) { | |
| 77 | + if (!hasEffectImport || !isFilterCall(node)) return; | |
| 78 | + const predicate = unwrapExpression(node.arguments[0]); | |
| 79 | + if ( | |
| 80 | + (predicate?.type === "ArrowFunctionExpression" || | |
| 81 | + predicate?.type === "FunctionExpression") && | |
| 82 | + isNullishPredicateFunction(predicate) | |
| 83 | + ) { | |
| 84 | + context.report({ node: predicate, message }); | |
| 85 | + } | |
| 86 | + }, | |
| 87 | + }; | |
| 88 | + }, | |
| 89 | +}; | |