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/**
* @fileoverview Rule to check for tabs inside a file
* @author Gyandeep Singh
*/
"use strict";
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const tabRegex = /\t+/gu;
const anyNonWhitespaceRegex = /\S/u;
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
/** @type {import('../shared/types').Rule} */
module.exports = {
meta: {
type: "layout",
docs: {
description: "Disallow all tabs",
recommended: false,
url: "https://eslint.org/docs/latest/rules/no-tabs"
},
schema: [{
type: "object",
properties: {
allowIndentationTabs: {
type: "boolean",
default: false
}
},
additionalProperties: false
}],
messages: {
unexpectedTab: "Unexpected tab character."
}
},
create(context) {
const sourceCode = context.sourceCode;
const allowIndentationTabs = context.options && context.options[0] && context.options[0].allowIndentationTabs;
return {
Program(node) {
sourceCode.getLines().forEach((line, index) => {
let match;
while ((match = tabRegex.exec(line)) !== null) {
if (allowIndentationTabs && !anyNonWhitespaceRegex.test(line.slice(0, match.index))) {
continue;
}
context.report({
node,
loc: {
start: {
line: index + 1,
column: match.index
},
end: {
line: index + 1,
column: match.index + match[0].length
}
},
messageId: "unexpectedTab"
});
}
});
}
};
}
};
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