Platform Specific Version Selector Install Scripts

creating platform specific install scripts for my environment

My environment and dotfiles are installed automatically when the install scripts are run. These scripts will run other dependent scripts designed as version selectors for programs where there is no common apt or brew installation package candidate.

There are two such programs:

bat is a command to preview and pretty print code or markdown with syntax highlighting. It has an installation package in apt on some debian systems, but the apt package for bat does not actually seem to work. I have started downloading the release package directly from github.

lazygit is a Text User Interface for optimizing git workflow. It makes it very easy to commit files quickly or pick and choose specific files to stage. It is similar in functionality to the git workflow panel within Visual Studio Code.

In order to create the version selectors and download releases from github, I first needed to create a script to get all the github release links for the latest release of a repository. I can do this with two API calls from curl within bash scripts. The data that is returned from the script is formatted as two columns, filenames and URL.

$ github-latest-files https://github.com/jesseduffield/lazygit
checksums.txt   https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/checksums.txt
lazygit_0.40.2_Darwin_arm64.tar.gz      https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Darwin_arm64.tar.gz
lazygit_0.40.2_Darwin_x86_64.tar.gz     https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Darwin_x86_64.tar.gz
lazygit_0.40.2_freebsd_32-bit.tar.gz    https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_freebsd_32-bit.tar.gz
lazygit_0.40.2_freebsd_arm64.tar.gz     https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_freebsd_arm64.tar.gz
lazygit_0.40.2_freebsd_armv6.tar.gz     https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_freebsd_armv6.tar.gz
lazygit_0.40.2_freebsd_x86_64.tar.gz    https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_freebsd_x86_64.tar.gz
lazygit_0.40.2_Linux_32-bit.tar.gz      https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Linux_32-bit.tar.gz
lazygit_0.40.2_Linux_arm64.tar.gz       https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Linux_arm64.tar.gz
lazygit_0.40.2_Linux_armv6.tar.gz       https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Linux_armv6.tar.gz
lazygit_0.40.2_Linux_x86_64.tar.gz      https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Linux_x86_64.tar.gz
lazygit_0.40.2_Windows_32-bit.zip       https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Windows_32-bit.zip
lazygit_0.40.2_Windows_arm64.zip        https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Windows_arm64.zip
lazygit_0.40.2_Windows_armv6.zip        https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Windows_armv6.zip
lazygit_0.40.2_Windows_x86_64.zip       https://github.com/jesseduffield/lazygit/releases/download/v0.40.2/lazygit_0.40.2_Windows_x86_64.zip

It is then necessary to write a quick Bash and AWK script combo to select the appropriate version of each program based on your architecture.

selecting version based on architecture

This is a excerpt from a script to select the release link for the architecture. It takes the architecture string of your CPU and finds a corresponding release link from bat.

# select architecture and convert to names used in bat releases
export desired_arch=$( lscpu |  awk '/Architecture/ { print $2 }' | awk '
  /aarch/ { print "arm64" }
  /arm.*64/ { print "arm64" }
  /arm.*32/ { print "armhf" } # test this - is this right?
  /x.*64/ { print "amd64" }
' )

if [ -z "$desired_arch" ]; then
  echo "could not interpret this architecture version."
  exit 1
fi

# find the url that corresponds to the selected architecture from above
download_url=$(zet/20230905030303/github-latest-files https://github.com/sharkdp/bat | grep -v musl | awk '$1 ~ /deb$/' | awk '
  $1 ~ ENVIRON["desired_arch"] { print $2 }
')