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package shared
import (
"fmt"
"os"
"strings"
)
// GenerateCommand takes a label (string) and converts it to an executable command
func GenerateCommand(command, imageName, name string) []string {
var (
newCommand []string
)
if name == "" {
name = imageName
}
cmd := strings.Split(command, " ")
// Replace the first element of cmd with "/proc/self/exe"
newCommand = append(newCommand, "/proc/self/exe")
for _, arg := range cmd[1:] {
var newArg string
switch arg {
case "IMAGE":
newArg = imageName
case "IMAGE=IMAGE":
newArg = fmt.Sprintf("IMAGE=%s", imageName)
case "IMAGE=$IMAGE":
newArg = fmt.Sprintf("IMAGE=%s", imageName)
case "NAME":
newArg = name
case "NAME=NAME":
newArg = fmt.Sprintf("NAME=%s", name)
case "NAME=$NAME":
newArg = fmt.Sprintf("NAME=%s", name)
default:
newArg = arg
}
newCommand = append(newCommand, newArg)
}
return newCommand
}
// GenerateRunEnvironment merges the current environment variables with optional
// environment variables provided by the user
func GenerateRunEnvironment(name, imageName string, opts map[string]string) []string {
newEnv := os.Environ()
newEnv = append(newEnv, fmt.Sprintf("NAME=%s", name))
newEnv = append(newEnv, fmt.Sprintf("IMAGE=%s", imageName))
if opts["opt1"] != "" {
newEnv = append(newEnv, fmt.Sprintf("OPT1=%s", opts["opt1"]))
}
if opts["opt2"] != "" {
newEnv = append(newEnv, fmt.Sprintf("OPT2=%s", opts["opt2"]))
}
if opts["opt3"] != "" {
newEnv = append(newEnv, fmt.Sprintf("OPT3=%s", opts["opt3"]))
}
return newEnv
}
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