Swift + CLion, Linux.

0.Buy CLion

1.Install Ubuntu LTS
1.1 Install dependencies (Ubuntu 20.04):

$ sudo apt-get update 

$ sudo apt-get install \
          binutils \
          git \
          gnupg2 \
          libc6-dev \
          libcurl4 \
          libedit2 \
          libgcc-9-dev \
          libpython2.7 \
          libsqlite3-0 \
          libstdc++-9-dev \
          libxml2 \
          libz3-dev \
          pkg-config \
          tzdata \
          zlib1g-dev

2.Download Clion.
2.1 Extract: tar -xzf Clion.*.tar.gz
2.2 Run: .../bin/CLion.sh
2.3 Install Swift plugin for CLion

3.Download Swift.
3.1 Extract: tar -xzf swift.*.tar.gz
3.2 Setup Swift plugin for CLion

4.GO!