packer-cn/fix/fixer_powershell_escapes.go

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package fix
import (
"github.com/mitchellh/mapstructure"
"strings"
)
// FixerPowerShellEscapes removes the PowerShell escape character from user
// environment variables and elevated username and password strings
type FixerPowerShellEscapes struct{}
func (FixerPowerShellEscapes) Fix(input map[string]interface{}) (map[string]interface{}, error) {
type template struct {
Provisioners []interface{}
}
var psUnescape = strings.NewReplacer(
"`$", "$",
"`\"", "\"",
"``", "`",
"`'", "'",
)
// Decode the input into our structure, if we can
var tpl template
if err := mapstructure.WeakDecode(input, &tpl); err != nil {
return nil, err
}
for i, raw := range tpl.Provisioners {
var provisioners map[string]interface{}
if err := mapstructure.Decode(raw, &provisioners); err != nil {
// Ignore errors, could be a non-map
continue
}
if ok := provisioners["type"] == "powershell"; !ok {
continue
}
if _, ok := provisioners["elevated_user"]; ok {
provisioners["elevated_user"] = psUnescape.Replace(provisioners["elevated_user"].(string))
}
if _, ok := provisioners["elevated_password"]; ok {
provisioners["elevated_password"] = psUnescape.Replace(provisioners["elevated_password"].(string))
}
if raw, ok := provisioners["environment_vars"]; ok {
var env_vars []string
if err := mapstructure.Decode(raw, &env_vars); err != nil {
continue
}
env_vars_unescaped := make([]interface{}, len(env_vars))
for j, env_var := range env_vars {
env_vars_unescaped[j] = psUnescape.Replace(env_var)
}
// Replace with unescaped environment variables
provisioners["environment_vars"] = env_vars_unescaped
}
// Write all changes back to template
tpl.Provisioners[i] = provisioners
}
if len(tpl.Provisioners) > 0 {
input["provisioners"] = tpl.Provisioners
}
return input, nil
}
func (FixerPowerShellEscapes) Synopsis() string {
return `Removes PowerShell escapes from user env vars and elevated username and password strings`
}