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Diffstat (limited to 'tools/node_modules/eslint/lib/rules/linebreak-style.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/linebreak-style.js | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/linebreak-style.js b/tools/node_modules/eslint/lib/rules/linebreak-style.js new file mode 100644 index 0000000000..907bc02ec4 --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/linebreak-style.js @@ -0,0 +1,96 @@ +/** + * @fileoverview Rule to enforce a single linebreak style. + * @author Erik Mueller + */ + +"use strict"; + +//------------------------------------------------------------------------------ +// Requirements +//------------------------------------------------------------------------------ + +const astUtils = require("../ast-utils"); + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "enforce consistent linebreak style", + category: "Stylistic Issues", + recommended: false + }, + + fixable: "whitespace", + + schema: [ + { + enum: ["unix", "windows"] + } + ] + }, + + create(context) { + + const EXPECTED_LF_MSG = "Expected linebreaks to be 'LF' but found 'CRLF'.", + EXPECTED_CRLF_MSG = "Expected linebreaks to be 'CRLF' but found 'LF'."; + + const sourceCode = context.getSourceCode(); + + //-------------------------------------------------------------------------- + // Helpers + //-------------------------------------------------------------------------- + + /** + * Builds a fix function that replaces text at the specified range in the source text. + * @param {int[]} range The range to replace + * @param {string} text The text to insert. + * @returns {Function} Fixer function + * @private + */ + function createFix(range, text) { + return function(fixer) { + return fixer.replaceTextRange(range, text); + }; + } + + //-------------------------------------------------------------------------- + // Public + //-------------------------------------------------------------------------- + + return { + Program: function checkForlinebreakStyle(node) { + const linebreakStyle = context.options[0] || "unix", + expectedLF = linebreakStyle === "unix", + expectedLFChars = expectedLF ? "\n" : "\r\n", + source = sourceCode.getText(), + pattern = astUtils.createGlobalLinebreakMatcher(); + let match; + + let i = 0; + + while ((match = pattern.exec(source)) !== null) { + i++; + if (match[0] === expectedLFChars) { + continue; + } + + const index = match.index; + const range = [index, index + match[0].length]; + + context.report({ + node, + loc: { + line: i, + column: sourceCode.lines[i - 1].length + }, + message: expectedLF ? EXPECTED_LF_MSG : EXPECTED_CRLF_MSG, + fix: createFix(range, expectedLFChars) + }); + } + } + }; + } +}; |