pedroMMM/goss

package system

import (
    "errors"
    "strings"

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

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

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

func (p *PacmanPackage) setup() {
    if p.loaded {
        return
    }
    p.loaded = true
    // TODO: extract versions
    cmd := util.NewCommand("pacman", "-Q", "--color", "never", "--noconfirm", p.name)
    if err := cmd.Run(); err != nil {
        return
    }
    p.installed = true
    // the output format is "pkgname version\n", so if we split the string on
    // whitespace, the version is the second item.
    p.versions = []string{strings.Fields(cmd.Stdout.String())[1]}
}

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

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

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

    return p.installed, nil
}

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