kerl ==== Easy building and installing of Erlang/OTP instances Kerl aims to be shell agnostic and its only dependencies, excluding what's required to actually build Erlang/OTP, are curl and git. Unless explicitely disabled, agner is installed automatically in the sandboxes for supported Erlang/OTP versions. All done so that, once a specific release has been built, creating a new installation is as fast as possible. Downloading =========== You can download the script directly from github: $ curl -O https://github.com/evax/kerl/raw/master/kerl Then ensure its executable $ chmod a+x kerl and drop it in your $PATH How it works ============ Kerl keeps tracks of the releases it downloaded, built and installed, allowing easy installations to new destinations (without complete rebuilding) and easy switches between Erlang/OTP installations. Usage ===== List the available releases (kerl ignores releases < 10): $ ./kerl list releases Getting the available releases from erlang.org... R10B-0 R10B-2 R10B-3 R10B-4 R10B-5 R10B-6 R10B-7 R10B-8 R10B-9 R11B-0 R11B-1 R11B-2 R11B-3 R11B-4 R11B-5 R12B-0 R12B-1 R12B-2 R12B-3 R12B-4 R12B-5 R13A R13B R13B01 R13B02 R13B03 R13B04 R14A R14B R14B01 R14B02 Run "./kerl update releases" to update this list from erlang.org Pick your choice and build it: $ kerl build R14B02 Downloading otp_src_R14B02.tar.gz to /home/evax/.kerl/archives (curl progresses...) Verifying archive checksum... (curl progresses...) Checksum verified (229fb8f193b09ac04a57a9d7794349b7) Extracting source code Building Erlang/OTP R14B02, please wait... Erlang/OTP R14B02 has been successfully built Fetching and building agner... Agner has been successfully built You can verify it's been registered: $ kerl list builds R14B02 Now install it to some location (optionally you can disable agner support by adding KERL_DISABLE_AGNER=yes to your $HOME/.kerlrc file, or on the contrary define a list of additional packages to install using the KERL_AGNER_AUTOINSTALL directive in the same file): $ kerl install R14B02 /path/to/install/dir/ Installing Erlang/OTP R14B02 in /path/to/install/dir... Installing agner in /path/to/install/dir... You can activate this installation running the following command: . /path/to/install/dir/activate Later on, you can leave the installation typing: kerl_deactivate Here again you can check the installation's been registered: $ kerl list installations R14B02 /path/to/install/dir And at last activate it: $ . /path/to/install/dir/activate You're now ready to work with R14B02: $ erl -version Erlang (SMP,ASYNC_THREADS,HIPE) (BEAM) emulator version 5.8.3 $ agner version 0.4.16 You can use agner to install packages in your activated installation, they'll be directly available: $ agner install cowboy (...) Installed to: /path/to/install/dir/lib/cowboy-@master $ erl (...) Eshell V5.8.3 (abort with ^G) 1> application:start(cowboy). ok Note that you can also define a list of packages to be autoinstalled on agner enabled installations using the KERL_AGNER_AUTOINSTALL entry in you $HOME/.kerlrc file When your done just type: $ kerl_deactivate Anytime you can check which installation, if any, is currently active with: $ kerl active No Erlang/OTP kerl installation is currently active You can get an overview of the current kerl state with: $ kerl status Available builds: R14B02 ---------- Available installations: R14B02 /path/to/install/dir ---------- Currently active installation: The current active installation is: /path/to/install/dir You can delete builds and installations with the following commands: $ kerl delete build R14B02 The R14B02 build has been deleted $ kerl delete installation /path/to/install/dir The installation in /path/to/install/dir has been deleted You can update the agner version associated with a specific build (this will only affect installations made after that): $ kerl update agner R14B02 Updating agner for build R14B02... agner has been updated successfully Tuning ====== You can tune kerl using the .kerlrc file in your $HOME directory. You can set the following variables: - KERL_DOWNLOAD_DIR where to put downloaded files, defaults to $HOME/.kerl/archives - KERL_BUILD_DIR where to hold the builds, defaults to $HOME/.kerl/builds - KERL_CONFIGURE_OPTIONS options to pass to Erlang's ./configure script, e.g. --without-termcap - KERL_DISABLE_AGNER if non-empty will disable agner support - KERL_AGNER_AUTOINSTALL a list of packages to pre-install - KERL_SASL_STARTUP use SASL system startup instead of minimal