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format.ts
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format.ts
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
import type { SemVer } from "./types.ts";
import { isWildcardComparator } from "./_shared.ts";
function formatNumber(value: number) {
if (value === Number.POSITIVE_INFINITY) {
return "∞";
} else if (value === Number.NEGATIVE_INFINITY) {
return "⧞";
} else {
return value.toFixed(0);
}
}
/**
* Format a SemVer object into a string.
*
* If any number is NaN then NaN will be printed.
*
* If any number is positive or negative infinity then '∞' or '⧞' will be printed instead.
*
* @param semver The semantic version to format
* @returns The string representation of a semantic version.
*/
export function format(semver: SemVer): string {
if (isWildcardComparator(semver)) {
return "*";
}
const major = formatNumber(semver.major);
const minor = formatNumber(semver.minor);
const patch = formatNumber(semver.patch);
const pre = semver.prerelease?.join(".") ?? "";
const build = semver.build?.join(".") ?? "";
const primary = `${major}.${minor}.${patch}`;
const release = [primary, pre].filter((v) => v).join("-");
return [release, build].filter((v) => v).join("+");
}