2018-02-07 00:38:01 +00:00
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/*
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Copyright 2018 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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2018-11-08 22:34:44 +00:00
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"fmt"
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2018-02-07 00:38:01 +00:00
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"github.com/gravitational/trace"
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2018-11-08 22:34:44 +00:00
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"github.com/coreos/go-semver/semver"
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2018-02-07 00:38:01 +00:00
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)
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2018-11-08 22:34:44 +00:00
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// CheckVersions compares client and server versions and makes sure that the
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// client version is greater than or equal to the minimum version supported
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// by the server.
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func CheckVersions(clientVersion string, minClientVersion string) error {
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2018-02-07 00:38:01 +00:00
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clientSemver, err := semver.NewVersion(clientVersion)
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if err != nil {
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return trace.Wrap(err,
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"unsupported version format, need semver format: %q, e.g 1.0.0", clientVersion)
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}
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2018-11-08 22:34:44 +00:00
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minClientSemver, err := semver.NewVersion(minClientVersion)
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2018-02-07 00:38:01 +00:00
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if err != nil {
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return trace.Wrap(err,
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2018-11-08 22:34:44 +00:00
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"unsupported version format, need semver format: %q, e.g 1.0.0", minClientVersion)
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2018-02-07 00:38:01 +00:00
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}
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2018-11-08 22:34:44 +00:00
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if clientSemver.Compare(*minClientSemver) < 0 {
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errorMessage := fmt.Sprintf("minimum client version supported by the server "+
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"is %v. Please upgrade the client, downgrade the server, or use the "+
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"--skip-version-check flag to by-pass this check.", minClientVersion)
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return trace.BadParameter(errorMessage)
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2018-02-07 00:38:01 +00:00
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}
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return nil
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}
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