Chore: Rule messages use internal rule message format (fixes #6977)

lib/rules/array-bracket-spacing.js

@@ -75,7 +75,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "There should be no space after '" + token.value + "'.",
+                message: "There should be no space after '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     const nextToken = sourceCode.getTokenAfter(token);
 
@@ -94,7 +97,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "There should be no space before '" + token.value + "'.",
+                message: "There should be no space before '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     const previousToken = sourceCode.getTokenBefore(token);
 
@@ -113,7 +119,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "A space is required after '" + token.value + "'.",
+                message: "A space is required after '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.insertTextAfter(token, " ");
                 }
@@ -130,7 +139,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "A space is required before '" + token.value + "'.",
+                message: "A space is required before '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.insertTextBefore(token, " ");
                 }

lib/rules/arrow-parens.js

@@ -87,7 +87,7 @@ module.exports = {
                         node,
                         message: requireForBlockBodyNoParensMessage,
                         fix(fixer) {
-                            return fixer.replaceText(token, "(" + token.value + ")");
+                            return fixer.replaceText(token, `(${token.value})`);
                         }
                     });
                 }
@@ -123,7 +123,7 @@ module.exports = {
                         node,
                         message,
                         fix(fixer) {
-                            return fixer.replaceText(token, "(" + token.value + ")");
+                            return fixer.replaceText(token, `(${token.value})`);
                         }
                     });
                 }

lib/rules/block-spacing.js

@@ -97,7 +97,10 @@ module.exports = {
                 context.report({
                     node,
                     loc: openBrace.loc.start,
-                    message: message + " after '{'.",
+                    message: "{{message}} after '{'.",
+                    data: {
+                        message
+                    },
                     fix(fixer) {
                         if (always) {
                             return fixer.insertTextBefore(firstToken, " ");
@@ -111,7 +114,10 @@ module.exports = {
                 context.report({
                     node,
                     loc: closeBrace.loc.start,
-                    message: message + " before '}'.",
+                    message: "{{message}} before '}'.",
+                    data: {
+                        message
+                    },
                     fix(fixer) {
                         if (always) {
                             return fixer.insertTextAfter(lastToken, " ");

lib/rules/class-methods-use-this.js

@@ -53,7 +53,13 @@ module.exports = {
             const methodUsesThis = stack.pop();
 
             if (isInstanceMethod(node.parent) && !methodUsesThis) {
-                context.report(node, "Expected 'this' to be used by class method '" + node.parent.key.name + "'.");
+                context.report({
+                    node,
+                    message: "Expected 'this' to be used by class method '{{classMethod}}'.",
+                    data: {
+                        classMethod: node.parent.key.name
+                    }
+                });
             }
         }
 

lib/rules/comma-spacing.js

@@ -97,8 +97,11 @@ module.exports = {
                     }
                 },
                 message: options[dir] ?
-                  "A space is required " + dir + " ','." :
-                  "There should be no space " + dir + " ','."
+                  "A space is required {{dir}} ','." :
+                  "There should be no space {{dir}} ','.",
+                data: {
+                    dir
+                }
             });
         }
 

lib/rules/computed-property-spacing.js

@@ -46,7 +46,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "There should be no space after '" + token.value + "'.",
+                message: "There should be no space after '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.removeRange([token.range[1], tokenAfter.range[0]]);
                 }
@@ -64,7 +67,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "There should be no space before '" + token.value + "'.",
+                message: "There should be no space before '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.removeRange([tokenBefore.range[1], token.range[0]]);
                 }
@@ -81,7 +87,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "A space is required after '" + token.value + "'.",
+                message: "A space is required after '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.insertTextAfter(token, " ");
                 }
@@ -98,7 +107,10 @@ module.exports = {
             context.report({
                 node,
                 loc: token.loc.start,
-                message: "A space is required before '" + token.value + "'.",
+                message: "A space is required before '{{tokenValue}}'.",
+                data: {
+                    tokenValue: token.value
+                },
                 fix(fixer) {
                     return fixer.insertTextBefore(token, " ");
                 }

lib/rules/consistent-return.js

@@ -145,9 +145,16 @@ module.exports = {
                 if (!funcInfo.hasReturn) {
                     funcInfo.hasReturn = true;
                     funcInfo.hasReturnValue = hasReturnValue;
-                    funcInfo.message = "Expected " + (hasReturnValue ? "a" : "no") + " return value.";
+                    funcInfo.message = "Expected {{which}} return value.";
+                    funcInfo.data = {
+                        which: hasReturnValue ? "a" : "no"
+                    };
                 } else if (funcInfo.hasReturnValue !== hasReturnValue) {
-                    context.report({node, message: funcInfo.message});
+                    context.report({
+                        node,
+                        message: funcInfo.message,
+                        data: funcInfo.data
+                    });
                 }
             },
 

lib/rules/curly.js

@@ -149,7 +149,7 @@ module.exports = {
                 message: "Expected { after '{{name}}'{{suffix}}.",
                 data: {
                     name,
-                    suffix: (suffix ? " " + suffix : "")
+                    suffix: (suffix ? ` ${suffix}` : "")
                 }
             });
         }
@@ -169,7 +169,7 @@ module.exports = {
                 message: "Unnecessary { after '{{name}}'{{suffix}}.",
                 data: {
                     name,
-                    suffix: (suffix ? " " + suffix : "")
+                    suffix: (suffix ? ` ${suffix}` : "")
                 }
             });
         }

lib/rules/dot-notation.js

@@ -51,18 +51,30 @@ module.exports = {
                     node.computed &&
                     node.property.type === "Literal" &&
                     validIdentifier.test(node.property.value) &&
-                    (allowKeywords || keywords.indexOf("" + node.property.value) === -1)
+                    (allowKeywords || keywords.indexOf(String(node.property.value)) === -1)
                 ) {
                     if (!(allowPattern && allowPattern.test(node.property.value))) {
-                        context.report(node.property, "[" + JSON.stringify(node.property.value) + "] is better written in dot notation.");
+                        context.report({
+                            node: node.property,
+                            message: "[{{propertyValue}}] is better written in dot notation.",
+                            data: {
+                                propertyValue: JSON.stringify(node.property.value)
+                            }
+                        });
                     }
                 }
                 if (
                     !allowKeywords &&
                     !node.computed &&
-                    keywords.indexOf("" + node.property.name) !== -1
+                    keywords.indexOf(String(node.property.name)) !== -1
                 ) {
-                    context.report(node.property, "." + node.property.name + " is a syntax error.");
+                    context.report({
+                        node: node.property,
+                        message: ".{{propertyName}} is a syntax error.",
+                        data: {
+                            propertyName: node.property.name
+                        }
+                    });
                 }
             }
         };

lib/rules/generator-star-spacing.js

@@ -87,11 +87,16 @@ module.exports = {
                 const spaceRequired = mode[side];
                 const node = after ? leftToken : rightToken;
                 const type = spaceRequired ? "Missing" : "Unexpected";
-                const message = type + " space " + side + " *.";
+                const message = "{{type}} space {{side}} *.";
+                const data = {
+                    type,
+                    side
+                };
 
                 context.report({
                     node,
                     message,
+                    data,
                     fix(fixer) {
                         if (spaceRequired) {
                             if (after) {

lib/rules/indent.js

@@ -168,7 +168,7 @@ module.exports = {
                 let rangeToFix = [];
 
                 if (needed > gotten) {
-                    const spaces = "" + new Array(needed - gotten + 1).join(indentChar);  // replace with repeat in future
+                    const spaces = indentChar.repeat(needed - gotten);
 
                     if (isLastNodeCheck === true) {
                         rangeToFix = [

lib/rules/init-declarations.js

@@ -114,9 +114,21 @@ module.exports = {
                     }
 
                     if (mode === MODE_ALWAYS && !initialized) {
-                        context.report(declaration, "Variable '" + id.name + "' should be initialized on declaration.");
+                        context.report({
+                            node: declaration,
+                            message: "Variable '{{idName}}' should be initialized on declaration.",
+                            data: {
+                                idName: id.name
+                            }
+                        });
                     } else if (mode === MODE_NEVER && kind !== "const" && initialized && !isIgnoredForLoop) {
-                        context.report(declaration, "Variable '" + id.name + "' should not be initialized on declaration.");
+                        context.report({
+                            node: declaration,
+                            message: "Variable '{{idName}}' should not be initialized on declaration.",
+                            data: {
+                                idName: id.name
+                            }
+                        });
                     }
                 }
             }

lib/rules/jsx-quotes.js

@@ -74,7 +74,10 @@ module.exports = {
                 if (attributeValue && astUtils.isStringLiteral(attributeValue) && !usesExpectedQuotes(attributeValue)) {
                     context.report({
                         node: attributeValue,
-                        message: "Unexpected usage of " + setting.description + ".",
+                        message: "Unexpected usage of {{description}}.",
+                        data: {
+                            description: setting.description
+                        },
                         fix(fixer) {
                             return fixer.replaceText(attributeValue, setting.convert(attributeValue.raw));
                         }

lib/rules/keyword-spacing.js

@@ -30,7 +30,7 @@ const KEYS = keywords.concat(["as", "await", "from", "get", "let", "of", "set",
     KEYS.sort();
     for (let i = 1; i < KEYS.length; ++i) {
         if (KEYS[i] === KEYS[i - 1]) {
-            throw new Error("Duplication was found in the keyword list: " + KEYS[i]);
+            throw new Error(`Duplication was found in the keyword list: ${KEYS[i]}`);
         }
     }
 }());

lib/rules/max-len.js

@@ -242,9 +242,25 @@ module.exports = {
                 }
 
                 if (lineIsComment && lineLength > maxCommentLength) {
-                    context.report(node, { line: lineNumber, column: 0 }, "Line " + (i + 1) + " exceeds the maximum comment line length of " + maxCommentLength + ".");
+                    context.report({
+                        node,
+                        loc: { line: lineNumber, column: 0 },
+                        message: "Line {{lineNumber}} exceeds the maximum comment line length of {{maxCommentLength}}.",
+                        data: {
+                            lineNumber: i + 1,
+                            maxCommentLength
+                        }
+                    });
                 } else if (lineLength > maxLength) {
-                    context.report(node, { line: lineNumber, column: 0 }, "Line " + (i + 1) + " exceeds the maximum line length of " + maxLength + ".");
+                    context.report({
+                        node,
+                        loc: { line: lineNumber, column: 0 },
+                        message: "Line {{lineNumber}} exceeds the maximum line length of {{maxLength}}.",
+                        data: {
+                            lineNumber: i + 1,
+                            maxLength
+                        }
+                    });
                 }
             });
         }

lib/rules/max-statements-per-line.js

@@ -35,7 +35,9 @@ module.exports = {
         const sourceCode = context.getSourceCode(),
             options = context.options[0] || {},
             maxStatementsPerLine = typeof options.max !== "undefined" ? options.max : 1,
-            message = "This line has too many statements. Maximum allowed is " + maxStatementsPerLine + ".";
+            message = "This line has too many statements. Maximum allowed is {{maxStatementsPerLine}}.",
+            data = { maxStatementsPerLine };
+
         let lastStatementLine = 0,
             numberOfStatementsOnThisLine = 0;
 
@@ -89,7 +91,7 @@ module.exports = {
 
             // Reports if the node violated this rule.
             if (numberOfStatementsOnThisLine === maxStatementsPerLine + 1) {
-                context.report({node, message});
+                context.report({node, message, data});
             }
         }
 
@@ -166,7 +168,7 @@ module.exports = {
             // Empty blocks should be warned if `{max: 0}` was given.
             BlockStatement: function reportIfZero(node) {
                 if (maxStatementsPerLine === 0 && node.body.length === 0) {
-                    context.report({node, message});
+                    context.report({node, message, data});
                 }
             }
         };

lib/rules/new-cap.js

@@ -37,7 +37,7 @@ function checkArray(obj, key, fallback) {
 
     /* istanbul ignore if */
     if (Object.prototype.hasOwnProperty.call(obj, key) && !Array.isArray(obj[key])) {
-        throw new TypeError(key + ", if provided, must be an Array");
+        throw new TypeError(`${key}, if provided, must be an Array`);
     }
     return obj[key] || fallback;
 }

lib/rules/newline-per-chained-call.js

@@ -69,11 +69,14 @@ module.exports = {
                 }
 
                 if (depth > ignoreChainWithDepth && callee.property.loc.start.line === callee.object.loc.end.line) {
-                    context.report(
-                        callee.property,
-                        callee.property.loc.start,
-                        "Expected line break before `" + getPropertyText(callee) + "`."
-                    );
+                    context.report({
+                        node: callee.property,
+                        loc: callee.property.loc.start,
+                        message: "Expected line break before `{{callee}}`.",
+                        data: {
+                            callee: getPropertyText(callee)
+                        }
+                    });
                 }
             }
         };