90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
'use strict';
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var utils = require('../utils.js');
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require('eslint-visitor-keys');
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require('espree');
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require('estraverse');
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var newlinePerChainedCall = utils.createRule({
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name: "newline-per-chained-call",
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package: "js",
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meta: {
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type: "layout",
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docs: {
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description: "Require a newline after each call in a method chain"
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},
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fixable: "whitespace",
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schema: [{
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type: "object",
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properties: {
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ignoreChainWithDepth: {
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type: "integer",
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minimum: 1,
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maximum: 10,
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default: 2
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}
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},
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additionalProperties: false
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}],
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messages: {
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expected: "Expected line break before `{{callee}}`."
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}
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},
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create(context) {
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const options = context.options[0] || {};
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const ignoreChainWithDepth = options.ignoreChainWithDepth || 2;
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const sourceCode = context.sourceCode;
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function getPrefix(node) {
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if (node.computed) {
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if (node.optional)
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return "?.[";
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return "[";
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}
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if (node.optional)
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return "?.";
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return ".";
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}
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function getPropertyText(node) {
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const prefix = getPrefix(node);
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const lines = sourceCode.getText(node.property).split(utils.LINEBREAK_MATCHER);
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const suffix = node.computed && lines.length === 1 ? "]" : "";
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return prefix + lines[0] + suffix;
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}
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return {
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"CallExpression:exit": function(node) {
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const callee = utils.skipChainExpression(node.callee);
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if (callee.type !== "MemberExpression")
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return;
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let parent = utils.skipChainExpression(callee.object);
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let depth = 1;
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while (parent && "callee" in parent && parent.callee) {
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depth += 1;
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const parentCallee = utils.skipChainExpression(parent.callee);
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if (!("object" in parentCallee))
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break;
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parent = utils.skipChainExpression(parentCallee.object);
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}
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if (depth > ignoreChainWithDepth && utils.isTokenOnSameLine(callee.object, callee.property)) {
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const firstTokenAfterObject = sourceCode.getTokenAfter(callee.object, utils.isNotClosingParenToken);
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context.report({
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node: callee.property,
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loc: {
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start: firstTokenAfterObject.loc.start,
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end: callee.loc.end
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},
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messageId: "expected",
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data: {
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callee: getPropertyText(callee)
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},
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fix(fixer) {
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return fixer.insertTextBefore(firstTokenAfterObject, "\n");
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}
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});
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}
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}
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};
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}
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});
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module.exports = newlinePerChainedCall;
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