mirror of https://github.com/webpack/webpack.git
104 lines
2.3 KiB
JavaScript
104 lines
2.3 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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/**
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* @param {string} version version as string
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* @returns {(number|string)[]} version as array
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*/
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exports.parseRequiredVersion = version => {
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let fuzzyStart = Infinity;
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if (version.startsWith(">=")) {
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fuzzyStart = 0;
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version = version.slice(2);
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} else if (version.startsWith("^")) {
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fuzzyStart = 1;
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version = version.slice(1);
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} else if (version.startsWith("~")) {
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fuzzyStart = 2;
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version = version.slice(1);
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}
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return version
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.split(".")
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.map((x, i) => (i >= fuzzyStart && `${+x}` === x ? +x : x));
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};
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/**
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* @param {string} version version as string
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* @returns {(number|string)[]} version as array
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*/
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exports.parseVersion = version => {
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return version.split(".").map(x => (`${+x}` === x ? +x : x));
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};
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/**
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* @param {(number|string)[]} version version
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* @returns {string} version as string
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*/
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exports.versionToString = version => {
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if (!version) return "(unknown)";
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const info = version.map(value =>
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typeof value !== "string"
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? {
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type: "min",
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value: `${value}`
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}
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: `${+value}` === value
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? {
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type: "exact",
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value
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}
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: {
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type: "tag",
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value
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}
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);
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switch (`${info[0].type}.${info.length > 1 ? info[1].type : "undefined"}`) {
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case "exact.min":
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case "tag.min":
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if (!info.slice(2).some(i => i.type === "exact"))
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return `^${version.join(".")}`;
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break;
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case "exact.exact":
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case "exact.tag":
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case "tag.exact":
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case "tag.tag":
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if (!info.slice(2).some(i => i.type === "exact"))
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return `~${version.join(".")}`;
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else if (!info.slice(2).some(i => i.type === "min"))
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return version.join(".");
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break;
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case "min.min":
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case "min.tag":
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if (!info.slice(2).some(i => i.type === "exact"))
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return `>=${version.join(".")}`;
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break;
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case "min.undefined":
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return `>=${version.join(".")}`;
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case "exact.undefined":
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case "tag.undefined":
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return version.join(".");
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}
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return info
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.map(i => (i.type === "exact" ? i.value : `[>=${i.value}]`))
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.join(".");
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};
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/**
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* @param {string} str maybe required version
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* @returns {boolean} true, if it looks like a version
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*/
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exports.isRequiredVersion = str => {
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if (str.startsWith("^")) return true;
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if (str.startsWith("~")) return true;
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if (str.startsWith(">=")) return true;
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return /^\d/.test(str);
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};
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