stuff

buildfiles/app/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js

@@ -0,0 +1,113 @@
+/**
+ * @fileoverview Disallow mixed spaces and tabs for indentation
+ * @author Jary Niebur
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "layout",
+
+        docs: {
+            description: "disallow mixed spaces and tabs for indentation",
+            category: "Stylistic Issues",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-mixed-spaces-and-tabs"
+        },
+
+        schema: [
+            {
+                enum: ["smart-tabs", true, false]
+            }
+        ],
+
+        messages: {
+            mixedSpacesAndTabs: "Mixed spaces and tabs."
+        }
+    },
+
+    create(context) {
+        const sourceCode = context.getSourceCode();
+
+        let smartTabs;
+
+        switch (context.options[0]) {
+            case true: // Support old syntax, maybe add deprecation warning here
+            case "smart-tabs":
+                smartTabs = true;
+                break;
+            default:
+                smartTabs = false;
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+
+            "Program:exit"(node) {
+                const lines = sourceCode.lines,
+                    comments = sourceCode.getAllComments(),
+                    ignoredCommentLines = new Set();
+
+                // Add all lines except the first ones.
+                comments.forEach(comment => {
+                    for (let i = comment.loc.start.line + 1; i <= comment.loc.end.line; i++) {
+                        ignoredCommentLines.add(i);
+                    }
+                });
+
+                /*
+                 * At least one space followed by a tab
+                 * or the reverse before non-tab/-space
+                 * characters begin.
+                 */
+                let regex = /^(?=( +|\t+))\1(?:\t| )/u;
+
+                if (smartTabs) {
+
+                    /*
+                     * At least one space followed by a tab
+                     * before non-tab/-space characters begin.
+                     */
+                    regex = /^(?=(\t*))\1(?=( +))\2\t/u;
+                }
+
+                lines.forEach((line, i) => {
+                    const match = regex.exec(line);
+
+                    if (match) {
+                        const lineNumber = i + 1;
+                        const loc = {
+                            start: {
+                                line: lineNumber,
+                                column: match[0].length - 2
+                            },
+                            end: {
+                                line: lineNumber,
+                                column: match[0].length
+                            }
+                        };
+
+                        if (!ignoredCommentLines.has(lineNumber)) {
+                            const containingNode = sourceCode.getNodeByRangeIndex(sourceCode.getIndexFromLoc(loc.start));
+
+                            if (!(containingNode && ["Literal", "TemplateElement"].includes(containingNode.type))) {
+                                context.report({
+                                    node,
+                                    loc,
+                                    messageId: "mixedSpacesAndTabs"
+                                });
+                            }
+                        }
+                    }
+                });
+            }
+        };
+    }
+};