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* Add semi from eslint * Add ClassProperty support to semi rule Fixes #43
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,225 @@ | ||
| /** | ||
| * @fileoverview Rule to flag missing semicolons. | ||
| * @author Nicholas C. Zakas | ||
| */ | ||
| "use strict"; | ||
|
|
||
| //------------------------------------------------------------------------------ | ||
| // Rule Definition | ||
| //------------------------------------------------------------------------------ | ||
|
|
||
| module.exports = { | ||
| meta: { | ||
| docs: { | ||
| description: "require or disallow semicolons instead of ASI", | ||
| category: "Stylistic Issues", | ||
| recommended: false | ||
| }, | ||
|
|
||
| fixable: "code", | ||
|
|
||
| schema: { | ||
| anyOf: [ | ||
| { | ||
| type: "array", | ||
| items: [ | ||
| { | ||
| enum: ["never"] | ||
| } | ||
| ], | ||
| minItems: 0, | ||
| maxItems: 1 | ||
| }, | ||
| { | ||
| type: "array", | ||
| items: [ | ||
| { | ||
| enum: ["always"] | ||
| }, | ||
| { | ||
| type: "object", | ||
| properties: { | ||
| omitLastInOneLineBlock: { type: "boolean" } | ||
| }, | ||
| additionalProperties: false | ||
| } | ||
| ], | ||
| minItems: 0, | ||
| maxItems: 2 | ||
| } | ||
| ] | ||
| } | ||
| }, | ||
|
|
||
| create(context) { | ||
|
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| const OPT_OUT_PATTERN = /^[-[(/+`]/; // One of [(/+-` | ||
| const options = context.options[1]; | ||
| const never = context.options[0] === "never", | ||
| exceptOneLine = options && options.omitLastInOneLineBlock === true, | ||
| sourceCode = context.getSourceCode(); | ||
|
|
||
| //-------------------------------------------------------------------------- | ||
| // Helpers | ||
| //-------------------------------------------------------------------------- | ||
|
|
||
| /** | ||
| * Reports a semicolon error with appropriate location and message. | ||
| * @param {ASTNode} node The node with an extra or missing semicolon. | ||
| * @param {boolean} missing True if the semicolon is missing. | ||
| * @returns {void} | ||
| */ | ||
| function report(node, missing) { | ||
| const lastToken = sourceCode.getLastToken(node); | ||
| let message, | ||
| fix, | ||
| loc = lastToken.loc; | ||
|
|
||
| if (!missing) { | ||
| message = "Missing semicolon."; | ||
| loc = loc.end; | ||
| fix = function(fixer) { | ||
| return fixer.insertTextAfter(lastToken, ";"); | ||
| }; | ||
| } else { | ||
| message = "Extra semicolon."; | ||
| loc = loc.start; | ||
| fix = function(fixer) { | ||
| return fixer.remove(lastToken); | ||
| }; | ||
| } | ||
|
|
||
| context.report({ | ||
| node, | ||
| loc, | ||
| message, | ||
| fix | ||
| }); | ||
|
|
||
| } | ||
|
|
||
| /** | ||
| * Checks whether a token is a semicolon punctuator. | ||
| * @param {Token} token The token. | ||
| * @returns {boolean} True if token is a semicolon punctuator. | ||
| */ | ||
| function isSemicolon(token) { | ||
| return (token.type === "Punctuator" && token.value === ";"); | ||
| } | ||
|
|
||
| /** | ||
| * Check if a semicolon is unnecessary, only true if: | ||
| * - next token is on a new line and is not one of the opt-out tokens | ||
| * - next token is a valid statement divider | ||
| * @param {Token} lastToken last token of current node. | ||
| * @returns {boolean} whether the semicolon is unnecessary. | ||
| */ | ||
| function isUnnecessarySemicolon(lastToken) { | ||
| if (!isSemicolon(lastToken)) { | ||
| return false; | ||
| } | ||
|
|
||
| const nextToken = sourceCode.getTokenAfter(lastToken); | ||
|
|
||
| if (!nextToken) { | ||
| return true; | ||
| } | ||
|
|
||
| const lastTokenLine = lastToken.loc.end.line; | ||
| const nextTokenLine = nextToken.loc.start.line; | ||
| const isOptOutToken = OPT_OUT_PATTERN.test(nextToken.value) && nextToken.value !== "++" && nextToken.value !== "--"; | ||
| const isDivider = (nextToken.value === "}" || nextToken.value === ";"); | ||
|
|
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| return (lastTokenLine !== nextTokenLine && !isOptOutToken) || isDivider; | ||
| } | ||
|
|
||
| /** | ||
| * Checks a node to see if it's in a one-liner block statement. | ||
| * @param {ASTNode} node The node to check. | ||
| * @returns {boolean} whether the node is in a one-liner block statement. | ||
| */ | ||
| function isOneLinerBlock(node) { | ||
| const nextToken = sourceCode.getTokenAfter(node); | ||
|
|
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| if (!nextToken || nextToken.value !== "}") { | ||
| return false; | ||
| } | ||
|
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| const parent = node.parent; | ||
|
|
||
| return parent && parent.type === "BlockStatement" && | ||
| parent.loc.start.line === parent.loc.end.line; | ||
| } | ||
|
|
||
| /** | ||
| * Checks a node to see if it's followed by a semicolon. | ||
| * @param {ASTNode} node The node to check. | ||
| * @returns {void} | ||
| */ | ||
| function checkForSemicolon(node) { | ||
| const lastToken = sourceCode.getLastToken(node); | ||
|
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| if (never) { | ||
| if (isUnnecessarySemicolon(lastToken)) { | ||
| report(node, true); | ||
| } | ||
| } else { | ||
| if (!isSemicolon(lastToken)) { | ||
| if (!exceptOneLine || !isOneLinerBlock(node)) { | ||
| report(node); | ||
| } | ||
| } else { | ||
| if (exceptOneLine && isOneLinerBlock(node)) { | ||
| report(node, true); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| /** | ||
| * Checks to see if there's a semicolon after a variable declaration. | ||
| * @param {ASTNode} node The node to check. | ||
| * @returns {void} | ||
| */ | ||
| function checkForSemicolonForVariableDeclaration(node) { | ||
| const ancestors = context.getAncestors(), | ||
| parentIndex = ancestors.length - 1, | ||
| parent = ancestors[parentIndex]; | ||
|
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| if ((parent.type !== "ForStatement" || parent.init !== node) && | ||
| (!/^For(?:In|Of)Statement/.test(parent.type) || parent.left !== node) | ||
| ) { | ||
| checkForSemicolon(node); | ||
| } | ||
| } | ||
|
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| //-------------------------------------------------------------------------- | ||
| // Public API | ||
| //-------------------------------------------------------------------------- | ||
|
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| return { | ||
| VariableDeclaration: checkForSemicolonForVariableDeclaration, | ||
| ExpressionStatement: checkForSemicolon, | ||
| ReturnStatement: checkForSemicolon, | ||
| ThrowStatement: checkForSemicolon, | ||
| DoWhileStatement: checkForSemicolon, | ||
| DebuggerStatement: checkForSemicolon, | ||
| BreakStatement: checkForSemicolon, | ||
| ContinueStatement: checkForSemicolon, | ||
| ImportDeclaration: checkForSemicolon, | ||
| ExportAllDeclaration: checkForSemicolon, | ||
| ClassProperty: checkForSemicolon, | ||
| ExportNamedDeclaration(node) { | ||
| if (!node.declaration) { | ||
| checkForSemicolon(node); | ||
| } | ||
| }, | ||
| ExportDefaultDeclaration(node) { | ||
| if (!/(?:Class|Function)Declaration/.test(node.declaration.type)) { | ||
| checkForSemicolon(node); | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| } | ||
| }; |
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