asteris-llc/converge

// Copyright © 2016 Asteris, LLC
//
// 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 platform

import (
    "io/ioutil"
    "strings"

    "github.com/pkg/errors"
)

// LinuxLSB finds Linux LSB files and parses them
// Most modern :inux distributions have standardized on
// /etc/os-release
func (platform *Platform) LinuxLSB() error {
    lsbFile := "/etc/os-release"
    content, err := ioutil.ReadFile(lsbFile)
    if err != nil {
        return errors.Wrapf(err, "%s. Will be unable to parse LSB data", lsbFile)
    }
    platform.ParseLSBContent(string(content))
    return err
}

// ParseLSBContent populates a Platform struct with /etc/os-release data
func (platform *Platform) ParseLSBContent(content string) {
    lines := strings.Split(content, "\n")
    for _, v := range lines {
        s := strings.SplitN(v, "=", 2)
        if len(s) == 2 {
            k, v := s[0], strings.Replace(s[1], "\"", "", -1) //remove quotes
            switch k {
            case "NAME":
                platform.Name = v
            case "ID":
                platform.LinuxDistribution = v
            case "VERSION_ID":
                platform.Version = v
            case "ID_LIKE":
                platform.LinuxLSBLike = strings.Split(v, " ")
            case "BUILD_ID":
                platform.Build = v
            }
        }
    }
}