vorteil/vorteil

package vcfg

/**
 * SPDX-License-Identifier: Apache-2.0
 * Copyright 2020 vorteil.io Pty Ltd
 */

import (
    "errors"
    "fmt"

    "github.com/mattn/go-shellwords"
)

// hostname magic

func (p *Program) ProgramArgs() ([]string, error) {

    if p.Binary == "" && p.Args == "" {
        return nil, errors.New("no program binary or args defined")
    }

    s := []string{}
    if p.Binary != "" {
        s = append(s, p.Binary)
    }

    if p.Args != "" {
        sw := shellwords.NewParser()
        sw.ParseBacktick = false
        sw.ParseEnv = false
        args, err := sw.Parse(string(p.Args))
        if err != nil {
            return nil, fmt.Errorf("error parsing arg: %v", err)
        }
        s = append(s, args...)
    }

    return s, nil

}

func (vcfg *VCFG) SaltedHostname() string {
    hostname := vcfg.System.Hostname
    if hostname == "" {
        // use application name as base of hostname
        hostname = vcfg.Info.Name
        if hostname == "" {
            hostname = "vorteil"
        }

        // add $SALT so vinitd will add randomly generated characters on the end
        // 9 chars will be added by vinitd
        if len(hostname) > 54 {
            hostname = hostname[:54]
        }

        hostname = fmt.Sprintf("%s-$SALT", hostname)
    }

    l := 63
    if len(hostname) <= 64 {
        l = len(hostname)
    }

    return hostname[:l]
    // TODO: strip illegal characters
}