bbmustache
Binary pattern match Based Mustache template engine for Erlang/OTP.
Overview
- Binary pattern match based mustache template engine for Erlang/OTP.
- It means do not use regular expressions.
- Support maps and associative arrays.
- Officially support is OTP17 or later.
What is Mustache ?
A logic-less templates.
Usage
Quick start
$ git clone git://github.com/soranoba/bbmustache.git
$ cd bbmustache
$ make start
Erlang/OTP 17 [erts-6.3] [source-f9282c6] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:true]
Eshell V6.3 (abort with ^G)
1> bbmustache:render(<<"{{name}}">>, #{"name" => "hoge"}).
<<"hoge">>
2> bbmustache:render(<<"{{name}}">>, [{"name", "hoge"}]).
<<"hoge">>Use as a library
Add the following settings.
%% rebar (rebar.config)
{deps,
[
{bbmustache, ".*", {git, "git://github.com/soranoba/bbmustache.git", {branch, "master"}}}
]}.
%% rebar3 (rebar.config)
{deps, [bbmustache]}.How to use simple Mustache
Map
1> bbmustache:render(<<"{{name}}">>, #{"name" => "hoge"}).
<<"hoge">>
2> Template1 = bbmustache:parse_binary(<<"{{name}}">>).
...
3> bbmustache:compile(Template1, #{"name" => "hoge"}).
<<"hoge">>
4> Template2 = bbmustache:parse_file(<<"./hoge.mustache">>).
...
5> bbmustache:compile(Template2, #{"name" => "hoge"}).
<<"hoge">>Associative array
1> bbmustache:render(<<"{{name}}">>, [{"name", "hoge"}]).
<<"hoge">>
2> Template1 = bbmustache:parse_binary(<<"{{name}}">>).
...
3> bbmustache:compile(Template1, [{"name", "hoge"}]).
<<"hoge">>
4> Template2 = bbmustache:parse_file(<<"./hoge.mustache">>).
...
5> bbmustache:compile(Template2, [{"name", "hoge"}]).
<<"hoge">>Use as a command-line tool
make escriptize
echo '{"name", "hoge"}.' > vars.config
echo '{{name}}' > template.mustache
./bbmustache -d vars.config template.mustache
hogeData files (-d) support a single assoc list, a single map, and consult format.
Note: the behind term has a high priority in all cases. it is a result of supporting to allow for embedding relative file paths as in config.
More information
- For the alias of mustache, Please refer to ManPage and Specification
- For the options of this library, please see doc
- For the functions supported by this library, please see here
FAQ
Avoid http escaping
%% Please use `{{{tag}}}`
1> bbmustache:render(<<"<h1>{{{title}}}</h1>">>, #{"title" => "I like Erlang & mustache"}).
<<"<h1>I like Erlang & mustache</h1>">>
%% If you should not want to use `{{{tag}}}`, escape_fun can be use.
1> bbmustache:render(<<"<h1>{{title}}</h1>">>, #{"title" => "I like Erlang & mustache"}, [{escape_fun, fun(X) -> X end}]).
<<"<h1>I like Erlang & mustache</h1>">>
Already used { and } for other uses (like escript)
1> io:format(bbmustache:render(<<"
1> {{=<< >>=}}
1> {deps, [
1> <<#deps>>
1> {<<name>>, \"<<version>>\"}<<^last?>>,<</last?>>
1> <</deps>>
1> ]}.
1> ">>, #{"deps" => [
1> #{"name" => "bbmustache", "version" => "1.6.0"},
1> #{"name" => "jsone", "version" => "1.4.6", "last?" => true}
1> ]})).
{deps, [
{bbmustache, "1.6.0"},
{jsone, "1.4.6"}
]}.
okWant to use something other than string for key
1> bbmustache:render(<<"<h1>{{{title}}}</h1>">>, #{title => "I like Erlang & mustache"}, [{key_type, atom}]).
<<"<h1>I like Erlang & mustache</h1>">>
2> bbmustache:render(<<"<h1>{{{title}}}</h1>">>, #{<<"title">> => "I like Erlang & mustache"}, [{key_type, binary}]).
<<"<h1>I like Erlang & mustache</h1>">>Want to provide a custom serializer for Erlang Terms
1> bbmustache:render(<<"<h1>{{title}}</h1>">>, #{title => "I like Erlang & mustache"}, [{key_type, atom}, {value_serializer, fun(X) -> X end}]).
<<"<h1>I like Erlang & mustache</h1>">>
2> bbmustache:render(<<"<h1>{{{title}}}</h1>">>, #{<<"title">> => "I like Erlang & mustache"}, [{key_type, binary}, {value_serializer, fun(X) -> <<"replaced">> end}]).
<<"<h1>replaced</h1>">>
3> bbmustache:render(<<"<h1>{{{title}}}</h1>">>, #{<<"title">> => #{<<"nested">> => <<"value">>}}, [{key_type, binary}, {value_serializer, fun(X) -> jsone:encode(X) end}]).
<<"<h1>{\"nested\": \"value\"}</h1>">>
4> bbmustache:render(<<"<h1>{{title}}</h1>">>, #{<<"title">> => #{<<"nested">> => <<"value">>}}, [{key_type, binary}, {value_serializer, fun(X) -> jsone:encode(X) end}]).
<<"<h1>{"nested":"value"}</h1>">>Attention
- Lambda expression is included wasted processing.
- Because it is optimized to
parse_binary/1+compile/2.
- Because it is optimized to
Comparison with other libraries
Benchmarks and check the reference implementation
Contribute
Pull request is welcome =D
