Mustache

Prolog implementation and predicates for {{mustache}} templating system.

Supports all features of the mustache spec, with the following specifics:

• Lambdas: If the value associated with the property is term of the form ?(Goal) then the output is produced by the execution of the predicate once(call(Goal, Value, Result)) where result is consider as the actual value associated with the property.
• Extensions: The proeprty values may be passed to the goals and transformed before being placed to the output list. THis may be achieved by the syntax:

  Some transformed {{?- my_goal. variable }}

  In this case the output is produced by calling once(call(my_goal, Value, Result)). The goal itself is retrieved by the call to the read_term/2 therefore it must be ended by a dot.

USAGE

Use module mustache

Example:

:- use_module(library(`mustache`)).

hallo :-
    mustache_from_file('index.mustache', _{ name: 'World' }, Output },
    writeOutput()

Exported predicates

`mustache(+Variables:list, +In:codes)//` is det

Converts mustache template into the rendered text by replacing {{ variable }} placeholders with the variables specified in the Variables list. Variables is either list of terms Var - Value or Var = Value, or Variables and properties may be made of dicts. The value can be atomic, codes, string, or list of values, or if used with extension then any valid prolog term

mustache_from_file(+FileSpec, +Variables:list, -Out:codes) is det

Same as mustache//2 but loads the template from the FileSpec. FileSpec is resolved by absolute_file_name/3.

Testing

The script run-tests.ps1 executes the tests

Development

To debug the module, load the debug.pl file into prolog top.