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osarch.go
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osarch.go
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// Copyright 2016 Palantir Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package osarch
import (
"fmt"
"runtime"
"strings"
)
type OSArch struct {
OS string
Arch string
}
// String returns a string representation of the form "GOOS-GOARCH".
func (o OSArch) String() string {
return fmt.Sprintf("%v-%v", o.OS, o.Arch)
}
// Current returns and OSArch that reflects the GOOS/GOARCH value for the current runtime.
func Current() OSArch {
return OSArch{
OS: runtime.GOOS,
Arch: runtime.GOARCH,
}
}
// New returns an OSArch value for the provided input. Returns an error if the provided input is not of the correct
// format, which is defined as two non-empty alphanumeric strings separated by a single hyphen ("-").
func New(input string) (OSArch, error) {
if parts := strings.Split(input, "-"); len(parts) == 2 && isAlphaNumericOnly(parts[0]) && isAlphaNumericOnly(parts[1]) {
return OSArch{OS: parts[0], Arch: parts[1]}, nil
}
return OSArch{}, fmt.Errorf("not a valid OSArch value: %s", input)
}
func isAlphaNumericOnly(input string) bool {
if input == "" {
return false
}
for _, r := range input {
if !((r >= '0' && r <= '9') || (r >= 'A' && r <= 'Z') || (r >= 'a' && r <= 'z')) {
return false
}
}
return true
}