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export class GitVersion {
private readonly major: number = NaN
private readonly minor: number = NaN
private readonly patch: number = NaN
/**
* Used for comparing the version of git and git-lfs against the minimum required version
* @param version the version string, e.g. 1.2 or 1.2.3
*/
constructor(version?: string) {
if (version) {
const match = version.match(/^(\d+)\.(\d+)(\.(\d+))?$/)
if (match) {
this.major = Number(match[1])
this.minor = Number(match[2])
if (match[4]) {
this.patch = Number(match[4])
}
}
}
}
/**
* Compares the instance against a minimum required version
* @param minimum Minimum version
*/
checkMinimum(minimum: GitVersion): boolean {
if (!minimum.isValid()) {
throw new Error('Arg minimum is not a valid version')
}
// Major is insufficient
if (this.major < minimum.major) {
return false
}
// Major is equal
if (this.major === minimum.major) {
// Minor is insufficient
if (this.minor < minimum.minor) {
return false
}
// Minor is equal
if (this.minor === minimum.minor) {
// Patch is insufficient
if (this.patch && this.patch < (minimum.patch || 0)) {
return false
}
}
}
return true
}
/**
* Indicates whether the instance was constructed from a valid version string
*/
isValid(): boolean {
return !isNaN(this.major)
}
/**
* Returns the version as a string, e.g. 1.2 or 1.2.3
*/
toString(): string {
let result = ''
if (this.isValid()) {
result = `${this.major}.${this.minor}`
if (!isNaN(this.patch)) {
result += `.${this.patch}`
}
}
return result
}
}
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