Do you need different Terraform versions on different projects? Or maybe you want to test your modules with a new Terraform version?

chtf is a small shell tool for selecting a specified Terraform version. It can also install the specified version automatically.

chtf supports currently bash, zsh, and fish shells. Version switching itself doesn't have any external dependencies.

Optional automatic instal of missing Terraform versions requires either:

• Homebrew with yleisradio/terraforms Tap (see below)
• bash, unzip, and wget or curl

On MacOS (and OSX) the easiest way is to use Homebrew. After installing Homebrew, run:

brew install yleisradio/terraforms/chtf

Homebrew also installs the completion for all supported shells.

Manual installation on all systems:

curl -L -o chtf-2.1.1.tar.gz https://github.com/Yleisradio/chtf/archive/v2.1.1.tar.gz
tar -xzvf chtf-2.1.1.tar.gz
cd chtf-2.1.1/
make install

The default installation location is $HOME/share/chtf/ for bash/zsh, and $HOME/.config/fish/ for fish. See the Tips section for installing to other locations.

The etc/ directory includes completion files for the supported shells. Follow your shell's instructions how to install them. The fish autocompletion is installed for autoloading.

The following environment variables can be used for configuring chtf. Click to expand.

After installing, chtf has to be loaded to the shell.

The fish version is autoloaded so there is nothing more to do!

The base directory on the following examples depends how and where chtf is installed. This assumes make install. With Homebrew, replace $HOME with the output of brew --prefix.

New shell session has to be started for the changes to take effect.

Add the following to the ~/.bashrc or ~/.zshrc:

######################################################################
# chtf

# Uncomment and change the value to override the default:
#CHTF_AUTO_INSTALL="ask" # yes/no/ask

if [[ -f "$HOME/share/chtf/chtf.sh" ]]; then
    source "$HOME/share/chtf/chtf.sh"
fi

List all installed Terraform versions:

chtf

Select the wanted Terraform version, for example:

chtf 0.13.5

Use the Terraform version installed globally outside chtf (e.g. via a package manager):

chtf system

sudo make install PREFIX=/opt

brew install yleisradio/terraforms/chtf --HEAD

# bash and zsh
if [[ -f "$HOME/.terraform-version" ]]; then
    chtf "$(< "$HOME/.terraform-version")"
fi

# fish
if test -f $HOME/.terraform-version
    chtf (cat $HOME/.terraform-version)
end

brew cask uninstall terraform-<version>

rm -r "$CHTF_TERRAFORM_DIR/terraform-<version>"

brew uninstall chtf

rm -r "$HOME/share/chtf" # or where it was installed

Bug reports, pull requests, and other contributions are welcome on GitHub at https://github.com/Yleisradio/chtf.

This project is intended to be a safe, welcoming space for collaboration. By participating in this project you agree to abide by the terms of Contributor Code of Conduct.

The project is released as open source under the terms of the MIT License.

Original idea and implementation of chtf was heavily affected by chruby.

Included terraform-installer is released under the Apache 2.0 License.

NOTE: chtf was originally part of the homebrew-terraforms project, but has been extracted to own project and modified to support also non-Homebrew environments.