first.js
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'use strict';
module.exports = {
meta: {
docs: {}
},
create: function (context) {
function isPossibleDirective(node) {
return node.type === 'ExpressionStatement' && node.expression.type === 'Literal' && typeof node.expression.value === 'string';
}
return {
'Program': function (n) {
const body = n.body,
absoluteFirst = context.options[0] === 'absolute-first';
let nonImportCount = 0,
anyExpressions = false,
anyRelative = false;
body.forEach(function (node) {
if (!anyExpressions && isPossibleDirective(node)) {
return;
}
anyExpressions = true;
if (node.type === 'ImportDeclaration') {
if (absoluteFirst) {
if (/^\./.test(node.source.value)) {
anyRelative = true;
} else if (anyRelative) {
context.report({
node: node.source,
message: 'Absolute imports should come before relative imports.'
});
}
}
if (nonImportCount > 0) {
context.report({
node,
message: 'Import in body of module; reorder to top.'
});
}
} else {
nonImportCount++;
}
});
}
};
}
};
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