Installing Erlang with kerl
At Electric Imp, on developer PCs, we manage our Erlang versions with kerl.
Assuming you have
kerl available in your path (and you’ve installed the prerequisites), installing a version of Erlang is simple:
kerl update releases kerl build 21.2 21.2 kerl install 21.2 $HOME/.kerl/erlangs/21.2
You can tweak the Erlang build by setting the
environment variable. We don’t bother. If we did, we’d probably put a suffix on
the build name and install directory.
The installation directory (
~/.kerl/erlangs) was chosen to be similar to
where kiex installs Elixir versions.
We prefer building from github, using a tag:
kerl build git https://github.com/erlang/otp.git OTP-21.2.4 OTP-21.2.4 kerl install OTP-21.2.4 $HOME/.kerl/erlangs/OTP-21.2.4
This gives us the option of installing a patched fork, which has been necessary in the past.
Note that you can set (e.g.)
MAKEFLAGS=-j6 kerl build ... which will make the
In this case, the build name and installation directory are named after the tag
OTP-21.2.4), which makes it easier to tell which versions were built from
releases or from tags.
To activate the installation, you can do as kerl says:
…or you can use
If you’re running short of disk space, you can delete old builds:
kerl cleanup all
This doesn’t delete the installed versions.