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/**
* Given a MongoDB version, parses it into its major/minor/patch components,
* discounting '-pre' and '-rcX'. Useful for parsing the output of
* `db.version()` into an appropriate form for comparisons.
*
* Examples:
* getVersionComponents('2.7.8'); // { major: 2, minor: 7, patch: 8 }
* getVersionComponents('2.8.0-rc0'); // { major: 2, minor: 8, patch: 0 }
*/
var getVersionComponents = function(version) {
var splitVersion = version.split('.');
assert.eq(3, splitVersion.length);
var major = parseInt(splitVersion[0], 10);
var minor = parseInt(splitVersion[1], 10);
var patchEnd = splitVersion[2].indexOf('-') !== -1 ?
splitVersion[2].indexOf('-') :
undefined;
var patch = parseInt(splitVersion[2].substr(0, patchEnd));
return {
major: major,
minor: minor,
patch: patch,
};
};
/**
* Given two versions, returns true if the first version is >= the second.
*
* Examples:
* isAtLeastVersion('2.7.8', '2.7.8'); // true
* isAtLeastVersion('2.8.0-rc0', '2.7.8'); // true
* isAtLeastVersion('2.6.6', '2.7.8'); // false
* isAtLeastVersion('1.8.5', '2.7.8'); // false
*/
/* exported isAtLeastVersion */
var isAtLeastVersion = function(serverVersion, checkVersion) {
serverVersion = getVersionComponents(serverVersion);
checkVersion = getVersionComponents(checkVersion);
return (checkVersion.major < serverVersion.major) ||
(checkVersion.major === serverVersion.major &&
checkVersion.minor < serverVersion.minor) ||
(checkVersion.major === serverVersion.major &&
checkVersion.minor === serverVersion.minor &&
checkVersion.patch <= serverVersion.patch);
};
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