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Diffstat (limited to 'node_modules/fbjs/lib/VersionRange.js.flow')
-rw-r--r-- | node_modules/fbjs/lib/VersionRange.js.flow | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/node_modules/fbjs/lib/VersionRange.js.flow b/node_modules/fbjs/lib/VersionRange.js.flow deleted file mode 100644 index ad64790fe..000000000 --- a/node_modules/fbjs/lib/VersionRange.js.flow +++ /dev/null @@ -1,371 +0,0 @@ -/** - * Copyright (c) 2013-present, Facebook, Inc. - * - * This source code is licensed under the MIT license found in the - * LICENSE file in the root directory of this source tree. - * - * @providesModule VersionRange - */ - -'use strict'; - -const invariant = require('./invariant'); - -const componentRegex = /\./; -const orRegex = /\|\|/; -const rangeRegex = /\s+\-\s+/; -const modifierRegex = /^(<=|<|=|>=|~>|~|>|)?\s*(.+)/; -const numericRegex = /^(\d*)(.*)/; - -/** - * Splits input `range` on "||" and returns true if any subrange matches - * `version`. - * - * @param {string} range - * @param {string} version - * @returns {boolean} - */ -function checkOrExpression(range, version) { - const expressions = range.split(orRegex); - - if (expressions.length > 1) { - return expressions.some(range => VersionRange.contains(range, version)); - } else { - range = expressions[0].trim(); - return checkRangeExpression(range, version); - } -} - -/** - * Splits input `range` on " - " (the surrounding whitespace is required) and - * returns true if version falls between the two operands. - * - * @param {string} range - * @param {string} version - * @returns {boolean} - */ -function checkRangeExpression(range, version) { - const expressions = range.split(rangeRegex); - - invariant(expressions.length > 0 && expressions.length <= 2, 'the "-" operator expects exactly 2 operands'); - - if (expressions.length === 1) { - return checkSimpleExpression(expressions[0], version); - } else { - const [startVersion, endVersion] = expressions; - invariant(isSimpleVersion(startVersion) && isSimpleVersion(endVersion), 'operands to the "-" operator must be simple (no modifiers)'); - - return checkSimpleExpression('>=' + startVersion, version) && checkSimpleExpression('<=' + endVersion, version); - } -} - -/** - * Checks if `range` matches `version`. `range` should be a "simple" range (ie. - * not a compound range using the " - " or "||" operators). - * - * @param {string} range - * @param {string} version - * @returns {boolean} - */ -function checkSimpleExpression(range, version) { - range = range.trim(); - if (range === '') { - return true; - } - - const versionComponents = version.split(componentRegex); - const { modifier, rangeComponents } = getModifierAndComponents(range); - switch (modifier) { - case '<': - return checkLessThan(versionComponents, rangeComponents); - case '<=': - return checkLessThanOrEqual(versionComponents, rangeComponents); - case '>=': - return checkGreaterThanOrEqual(versionComponents, rangeComponents); - case '>': - return checkGreaterThan(versionComponents, rangeComponents); - case '~': - case '~>': - return checkApproximateVersion(versionComponents, rangeComponents); - default: - return checkEqual(versionComponents, rangeComponents); - } -} - -/** - * Checks whether `a` is less than `b`. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkLessThan(a, b) { - return compareComponents(a, b) === -1; -} - -/** - * Checks whether `a` is less than or equal to `b`. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkLessThanOrEqual(a, b) { - const result = compareComponents(a, b); - return result === -1 || result === 0; -} - -/** - * Checks whether `a` is equal to `b`. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkEqual(a, b) { - return compareComponents(a, b) === 0; -} - -/** - * Checks whether `a` is greater than or equal to `b`. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkGreaterThanOrEqual(a, b) { - const result = compareComponents(a, b); - return result === 1 || result === 0; -} - -/** - * Checks whether `a` is greater than `b`. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkGreaterThan(a, b) { - return compareComponents(a, b) === 1; -} - -/** - * Checks whether `a` is "reasonably close" to `b` (as described in - * https://www.npmjs.org/doc/misc/semver.html). For example, if `b` is "1.3.1" - * then "reasonably close" is defined as ">= 1.3.1 and < 1.4". - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {boolean} - */ -function checkApproximateVersion(a, b) { - const lowerBound = b.slice(); - const upperBound = b.slice(); - - if (upperBound.length > 1) { - upperBound.pop(); - } - const lastIndex = upperBound.length - 1; - const numeric = parseInt(upperBound[lastIndex], 10); - if (isNumber(numeric)) { - upperBound[lastIndex] = numeric + 1 + ''; - } - - return checkGreaterThanOrEqual(a, lowerBound) && checkLessThan(a, upperBound); -} - -/** - * Extracts the optional modifier (<, <=, =, >=, >, ~, ~>) and version - * components from `range`. - * - * For example, given `range` ">= 1.2.3" returns an object with a `modifier` of - * `">="` and `components` of `[1, 2, 3]`. - * - * @param {string} range - * @returns {object} - */ -function getModifierAndComponents(range) { - const rangeComponents = range.split(componentRegex); - const matches = rangeComponents[0].match(modifierRegex); - invariant(matches, 'expected regex to match but it did not'); - - return { - modifier: matches[1], - rangeComponents: [matches[2]].concat(rangeComponents.slice(1)) - }; -} - -/** - * Determines if `number` is a number. - * - * @param {mixed} number - * @returns {boolean} - */ -function isNumber(number) { - return !isNaN(number) && isFinite(number); -} - -/** - * Tests whether `range` is a "simple" version number without any modifiers - * (">", "~" etc). - * - * @param {string} range - * @returns {boolean} - */ -function isSimpleVersion(range) { - return !getModifierAndComponents(range).modifier; -} - -/** - * Zero-pads array `array` until it is at least `length` long. - * - * @param {array} array - * @param {number} length - */ -function zeroPad(array, length) { - for (let i = array.length; i < length; i++) { - array[i] = '0'; - } -} - -/** - * Normalizes `a` and `b` in preparation for comparison by doing the following: - * - * - zero-pads `a` and `b` - * - marks any "x", "X" or "*" component in `b` as equivalent by zero-ing it out - * in both `a` and `b` - * - marks any final "*" component in `b` as a greedy wildcard by zero-ing it - * and all of its successors in `a` - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {array<array<string>>} - */ -function normalizeVersions(a, b) { - a = a.slice(); - b = b.slice(); - - zeroPad(a, b.length); - - // mark "x" and "*" components as equal - for (let i = 0; i < b.length; i++) { - const matches = b[i].match(/^[x*]$/i); - if (matches) { - b[i] = a[i] = '0'; - - // final "*" greedily zeros all remaining components - if (matches[0] === '*' && i === b.length - 1) { - for (let j = i; j < a.length; j++) { - a[j] = '0'; - } - } - } - } - - zeroPad(b, a.length); - - return [a, b]; -} - -/** - * Returns the numerical -- not the lexicographical -- ordering of `a` and `b`. - * - * For example, `10-alpha` is greater than `2-beta`. - * - * @param {string} a - * @param {string} b - * @returns {number} -1, 0 or 1 to indicate whether `a` is less than, equal to, - * or greater than `b`, respectively - */ -function compareNumeric(a, b) { - const aPrefix = a.match(numericRegex)[1]; - const bPrefix = b.match(numericRegex)[1]; - const aNumeric = parseInt(aPrefix, 10); - const bNumeric = parseInt(bPrefix, 10); - - if (isNumber(aNumeric) && isNumber(bNumeric) && aNumeric !== bNumeric) { - return compare(aNumeric, bNumeric); - } else { - return compare(a, b); - } -} - -/** - * Returns the ordering of `a` and `b`. - * - * @param {string|number} a - * @param {string|number} b - * @returns {number} -1, 0 or 1 to indicate whether `a` is less than, equal to, - * or greater than `b`, respectively - */ -function compare(a, b) { - invariant(typeof a === typeof b, '"a" and "b" must be of the same type'); - - if (a > b) { - return 1; - } else if (a < b) { - return -1; - } else { - return 0; - } -} - -/** - * Compares arrays of version components. - * - * @param {array<string>} a - * @param {array<string>} b - * @returns {number} -1, 0 or 1 to indicate whether `a` is less than, equal to, - * or greater than `b`, respectively - */ -function compareComponents(a, b) { - const [aNormalized, bNormalized] = normalizeVersions(a, b); - - for (let i = 0; i < bNormalized.length; i++) { - const result = compareNumeric(aNormalized[i], bNormalized[i]); - if (result) { - return result; - } - } - - return 0; -} - -var VersionRange = { - /** - * Checks whether `version` satisfies the `range` specification. - * - * We support a subset of the expressions defined in - * https://www.npmjs.org/doc/misc/semver.html: - * - * version Must match version exactly - * =version Same as just version - * >version Must be greater than version - * >=version Must be greater than or equal to version - * <version Must be less than version - * <=version Must be less than or equal to version - * ~version Must be at least version, but less than the next significant - * revision above version: - * "~1.2.3" is equivalent to ">= 1.2.3 and < 1.3" - * ~>version Equivalent to ~version - * 1.2.x Must match "1.2.x", where "x" is a wildcard that matches - * anything - * 1.2.* Similar to "1.2.x", but "*" in the trailing position is a - * "greedy" wildcard, so will match any number of additional - * components: - * "1.2.*" will match "1.2.1", "1.2.1.1", "1.2.1.1.1" etc - * * Any version - * "" (Empty string) Same as * - * v1 - v2 Equivalent to ">= v1 and <= v2" - * r1 || r2 Passes if either r1 or r2 are satisfied - * - * @param {string} range - * @param {string} version - * @returns {boolean} - */ - contains(range, version) { - return checkOrExpression(range.trim(), version.trim()); - } -}; - -module.exports = VersionRange;
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