Looking for a tool or API to process service template files

[ygorelik]

I am looking for a tool to process service template files in terms of addressing all conditional statements.

Let's say I have a template that defines a user statement for the snmp v3 configuration on IOS device (part is shown, the full template can be found here😞

<user>
  <name>{$USER}</name>
  <group>nso-sync-monitor</group>
  <v3/>
  <?if {$AUTH = "auth"}?>
    <auth>{$AUTH_ALGORITHM}</auth>
    <auth-password>{$AUTH_PASSWORD}</auth-password>
  <?elif {$AUTH = "priv"}?>
    <auth>{$AUTH_ALGORITHM}</auth>
    <auth-password>{$AUTH_PASSWORD}</auth-password>
    <priv>{$PRIV_ALGORITHM}</priv>
    <?if {$PRIV_ALGORITHM = "aes"}?>
      <bits>128</bits>
    <?end?>
    <priv-password>{$PRIV_PASSWORD}</priv-password>
  <?end?>
</user>

 Given set of variables that control the conditional statement:

temp_vars = {AUTH: 'noauth'}

I should get the resulting XML:

<user>
  <name>{$USER}</name>
  <group>nso-sync-monitor</group>
  <v3/>
</user>

Needless to add that the conditional statements are not limited to if-else statement, but should cover the syntax, which is used in NSO template development. Ideally would be to have an NSO API, which processes the templates.

Thank you.