rebar

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History

joewilliams cb5056b2e3 Get rid of app.config app.config has been a long standing erroneous file in rebar. Erlang/OTP documentation suggests a sys.config file instead. This file is stored in the releases/VSN directory. This does a few things but most importantly it ensures your config (contained in the application environment) survives a hot upgrade. It also has the advantage of allowing the configuration of the application to be versioned along side the application code. This patch flips rebar to use sys.config rather than app.config. Additionally it makes this flip to vm.args as well, making them versioned just like sys.config. This patch also includes runner script changes to support the old etc/app.config config file location and support for Windows. Thanks to mokele for the initial work and kick in the pants to make this finially happen.		2011-09-20 09:44:41 -07:00
..
apps/dummy/src	Add 'generate-appups' command	2011-02-15 18:33:18 +01:00
rel	Get rid of app.config	2011-09-20 09:44:41 -07:00
README.md	Add 'generate-appups' command	2011-02-15 18:33:18 +01:00
rebar.config	Add 'generate-upgrade' command	2011-01-27 18:37:39 +01:00

README.md

Building version 0.1

rebar compile
rebar generate
mv rel/dummy rel/dummy_0.1
rebar clean
# start the release:
cd rel/dummy_0.1
bin/dummy console

erl> dummy_server:get_state().
erl> dummy_server:set_state(123).
erl> dummy_server:get_state().

Building version 0.2

# Now, in another terminal we prepare an upgrade..

# change release version numbers from 0.1 to 0.2 in
$EDITOR apps/dummy/src/dummy.app.src
$EDITOR rel/reltool.config

rebar compile
rebar generate
rebar generate-appups previous_release=dummy_0.1
rebar generate-upgrade previous_release=dummy_0.1
tar -zvtf rel/dummy_0.2.tar.gz

Deploying with release_handler

mv rel/dummy_0.2.tar.gz rel/dummy_0.1/releases/

# Now use release_handler in the running erlang console for the deploy:

erl> release_handler:unpack_release("dummy_0.2").
erl> release_handler:install_release("0.2").
erl> release_handler:make_permanent("0.2").

erl> release_handler:which_releases().
erl> dummy_server:get_state().