pedroMMM/goss

package system

import (
    "errors"
    "strings"

    "github.com/aelsabbahy/goss/util"
)

type AlpinePackage struct {
    name      string
    versions  []string
    loaded    bool
    installed bool
}

func NewAlpinePackage(name string, system *System, config util.Config) Package {
    return &AlpinePackage{name: name}
}

func (p *AlpinePackage) setup() {
    if p.loaded {
        return
    }
    p.loaded = true
    cmd := util.NewCommand("apk", "version", p.name)
    if err := cmd.Run(); err != nil {
        return
    }
    for _, l := range strings.Split(strings.TrimSpace(cmd.Stdout.String()), "\n") {
        if strings.HasPrefix(l, "Installed:") || strings.HasPrefix(l, "WARNING") {
            continue
        }
        ver := strings.TrimPrefix(strings.Fields(l)[0], p.name+"-")
        p.versions = append(p.versions, ver)
    }

    if len(p.versions) > 0 {
        p.installed = true
    }
}

func (p *AlpinePackage) Name() string {
    return p.name
}

func (p *AlpinePackage) Exists() (bool, error) { return p.Installed() }

func (p *AlpinePackage) Installed() (bool, error) {
    p.setup()

    return p.installed, nil
}

func (p *AlpinePackage) Versions() ([]string, error) {
    p.setup()
    if len(p.versions) == 0 {
        return p.versions, errors.New("Package version not found")
    }
    return p.versions, nil
}