How to install bup on Alpine Linux

In order to install the bup backup software on Alpine Linux, you currently have to compile it yourself.

First, install the prerequisites:

apk add bash make g++ python3-dev git automake autoconf par2cmdline py3-pip && pip3 install wheel && pip3 install pyxattr

Now we can clone bup:

git clone -b 0.33 --depth 1

and build:

cd bup && ./configure && make -j4 install PREFIX=/usr

After this, bup should be installed in /usr/bin/bup. The bup clone directory we created in the first step is not needed any more.