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import * as semver from "https://deno.land/x/semver@v1.4.0/mod.ts";
export function isSemver(rev: string): boolean {  return semver.clean(rev) != null;}
export function compareRev(a: string, b: string): -1 | 0 | 1 {  const aa = semver.clean(a);  const bb = semver.clean(b);  if (aa != null && bb == null) return -1;  if (aa == null && bb != null) return 1;  if (aa != null && bb != null) {    if (semver.lt(aa, bb)) return -1;    if (semver.gt(aa, bb)) return 1;  }  return a == b ? 0 : a < b ? -1 : 1;}
export type RevType = "commit" | "release" | "branch";export function getRevType(rev: string): RevType {  return isSha1(rev) ? "commit" : isSemver(rev) ? "release" : "branch";}
export function isSha1(text: string): boolean {  if (text.length !== 40) return false;  return !/[^0-9a-f]/.test(text);}