chinnurtb / active Goto Github PK

Active is an Erlang application that triggers rebuilds according to source changes. Active is also a new sync.

The key features are:

• active no longer hogs disk and cpu to check for changes. Instead, it uses erlfsmon to observe filesystem events.
• active uses rebar directly to build sources. This leverages rebar to build all kinds of source files that it can build including erlydtl templates.

An extremely simplified version of active can look like this (however it does not load any code):

# cat Makefile
sync:
	fsevent_watch -F . \
		| tee /dev/stderr \
		| env PERLIO=:raw perl -ne 's#.*\t.*\t$$ENV{"PWD"}/(apps|deps)/(\w+)/(?!ebin)#\2# && print "$$1=$$2\n"' \
		| xargs -n1 rebar compile

Just add a line to rebar.config:

    {active, ".*", {git, "[email protected]:proger/active", "HEAD"}}

And make sure you start it along in your release boot scripts or application startup scripts:

ERL_LIBS=deps erl -pa ebin -config sys.config \
    -eval '[ok = application:ensure_started(A, permanent) || A <- [sasl,lager,gproc,erlfsmon,compiler,crypto,syntax_tools,tools,rebar,active]]'

• rebar depends on sasl. If you don't wish to see large SASL logs (e.g. you use lager), turn them off in your config:

    {sasl, [{sasl_error_logger, false}]}