diff options
Diffstat (limited to 'tools/node_modules/eslint/lib/rules/unicode-bom.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/unicode-bom.js | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/unicode-bom.js b/tools/node_modules/eslint/lib/rules/unicode-bom.js new file mode 100644 index 0000000000..7109a49edb --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/unicode-bom.js @@ -0,0 +1,66 @@ +/** + * @fileoverview Require or disallow Unicode BOM + * @author Andrew Johnston <https://github.com/ehjay> + */ +"use strict"; + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "require or disallow Unicode byte order mark (BOM)", + category: "Stylistic Issues", + recommended: false + }, + + fixable: "whitespace", + + schema: [ + { + enum: ["always", "never"] + } + ] + }, + + create(context) { + + //-------------------------------------------------------------------------- + // Public + //-------------------------------------------------------------------------- + + return { + + Program: function checkUnicodeBOM(node) { + + const sourceCode = context.getSourceCode(), + location = { column: 0, line: 1 }, + requireBOM = context.options[0] || "never"; + + if (!sourceCode.hasBOM && (requireBOM === "always")) { + context.report({ + node, + loc: location, + message: "Expected Unicode BOM (Byte Order Mark).", + fix(fixer) { + return fixer.insertTextBeforeRange([0, 1], "\uFEFF"); + } + }); + } else if (sourceCode.hasBOM && (requireBOM === "never")) { + context.report({ + node, + loc: location, + message: "Unexpected Unicode BOM (Byte Order Mark).", + fix(fixer) { + return fixer.removeRange([-1, 0]); + } + }); + } + } + + }; + + } +}; |