Terraform version manager inspired by rbenv

Currently tfenv supports the following OSes

• Mac OS X (64bit)
• Linux
  • 64bit
  • Arm
• Windows (64bit) - only tested in git-bash - currently presumed failing due to symlink issues in git-bash

Install via Homebrew

$ brew install tfenv

Install via Arch User Repository (AUR)

$ yay --sync tfenv

Install via puppet

Using puppet module sergk-tfenv

include ::tfenv

1. Check out tfenv into any path (here is ${HOME}/.tfenv)

$ git clone https://github.com/tfutils/tfenv.git ~/.tfenv

2. Add ~/.tfenv/bin to your $PATH any way you like

$ echo 'export PATH="$HOME/.tfenv/bin:$PATH"' >> ~/.bash_profile

OR you can make symlinks for tfenv/bin/* scripts into a path that is already added to your $PATH (e.g. /usr/local/bin) OSX/Linux Only!

$ ln -s ~/.tfenv/bin/* /usr/local/bin

On Ubuntu/Debian touching /usr/local/bin might require sudo access, but you can create ${HOME}/bin or ${HOME}/.local/bin and on next login it will get added to the session $PATH or by running . ${HOME}/.profile it will get added to the current shell session's $PATH.

$ mkdir -p ~/.local/bin/
$ . ~/.profile
$ ln -s ~/.tfenv/bin/* ~/.local/bin
$ which tfenv

Install a specific version of Terraform.

If no parameter is passed, the version to use is resolved automatically via .terraform-version files or TFENV_TERRAFORM_VERSION environment variable (TFENV_TERRAFORM_VERSION takes precedence), defaulting to 'latest' if none are found.

If a parameter is passed, available options:

• x.y.z Semver 2.0.0 string specifying the exact version to install
• latest is a syntax to install latest version
• latest:<regex> is a syntax to install latest version matching regex (used by grep -e)
• min-required is a syntax to recursively scan your Terraform files to detect which version is minimally required. See required_version docs. Also see min-required section below.

$ tfenv install
$ tfenv install 0.7.0
$ tfenv install latest
$ tfenv install latest:^0.8
$ tfenv install min-required

If shasum is present in the path, tfenv will verify the download against Hashicorp's published sha256 hash. If keybase is available in the path it will also verify the signature for those published hashes using Hashicorp's published public key.

You can opt-in to using GnuPG tools for PGP signature verification if keybase is not available:

$ echo 'trust-tfenv: yes' > ~/.tfenv/use-gpgv
$ tfenv install

The trust-tfenv directive means that verification uses a copy of the Hashicorp OpenPGP key found in the tfenv repository. Skipping that directive means that the Hashicorp key must be in the existing default trusted keys. Use the file ~/.tfenv/use-gnupg to instead invoke the full gpg tool and see web-of-trust status; beware that a lack of trust path will not cause a validation failure.

If you use a .terraform-version file, tfenv install (no argument) will install the version written in it.

Please note that we don't do semantic version range parsing but use first ever found version as the candidate for minimally required one. It is up to the user to keep the definition reasonable. I.e.

// this will detect 0.12.3
terraform {
  required_version  = "<0.12.3, >= 0.10.0"
}

// this will detect 0.10.0
terraform {
  required_version  = ">= 0.10.0, <0.12.3"
}

String (Default: amd64)

Specify architecture. Architecture other than the default amd64 can be specified with the TFENV_ARCH environment variable

$ TFENV_ARCH=arm tfenv install 0.7.9

String (Default: true)

Should tfenv automatically install terraform if the version specified by defaults or a .terraform-version file is not currently installed.

$ TFENV_AUTO_INSTALL=false terraform plan

Integer (Default: 2)

Set the mechanism used for displaying download progress when downloading terraform versions from the remote server.

• 2: v1 Behaviour: Pass -# to curl
• 1: Use curl default
• 0: Pass -s to curl

Integer (Default: 0)

Set the debug level for TFENV.

• 0: No debug output
• 1: Simple debug output
• 2: Extended debug output, with source file names and interactive debug shells on error
• 3: Debug level 2 + Bash execution tracing

String (Default: https://releases.hashicorp.com)

To install from a remote other than the default

$ TFENV_REMOTE=https://example.jfrog.io/artifactory/hashicorp

Path (Default: $TFENV_ROOT)

The path to a directory where the local terraform versions and configuration files exist.

TFENV_CONFIG_DIR="$XDG_CONFIG_HOME/tfenv"

String (Default: "")

If not empty string, this variable overrides Terraform version, specified in .terraform-version files. latest and latest:<regex> syntax are also supported. tfenv install and tfenv use command also respects this variable.

e.g.

$ TFENV_TERRAFORM_VERSION=latest:^0.11. terraform --version

Integer (Default: 1)

To disable colouring of console output, set to 0.

String (Default: +%F %T)

The display format for the date as passed to the date binary to generate a datestamp used as a prefix to:

• FILE type log file lines.
• Each console output line when BASHLOG_EXTRA=1

Integer (Default: 0)

By default, console output from tfenv does not print a date stamp or log severity.

To enable this functionality, making normal output equivalent to FILE log output, set to 1.

Integer (Default: 0)

Set to 1 to enable plain text logging to file (FILE type logging).

The default path for log files is defined by /tmp/$(basename $0).log Each executable logs to its own file.

e.g.

$ BASHLOG_FILE=1 tfenv use latest

will log to /tmp/tfenv-use.log

String (Default: /tmp/$(basename ${0}).log)

To specify a single file as the target for all FILE type logging regardless of the executing script.

String (Default: "")

BE CAREFUL - MISUSE WILL DESTROY EVERYTHING YOU EVER LOVED

This variable allows you to pass a string containing a command that will be executed using eval in order to produce a prefix to each console output line, and each FILE type log entry.

e.g.

$ BASHLOG_I_PROMISE_TO_BE_CAREFUL_CUSTOM_EVAL_PREFIX='echo "${$$} "'

will prefix every log line with the calling process' PID.

Integer (Default: 0)

Set to 1 to enable JSON logging to file (JSON type logging).

The default path for log files is defined by /tmp/$(basename $0).log.json Each executable logs to its own file.

e.g.

$ BASHLOG_JSON=1 tfenv use latest

will log in JSON format to /tmp/tfenv-use.log.json

JSON log content:

{"timestamp":"<date +%s>","level":"<log-level>","message":"<log-content>"}

String (Default: /tmp/$(basename ${0}).log.json)

To specify a single file as the target for all JSON type logging regardless of the executing script.

Integer (Default: 0)

To log to syslog using the logger binary, set this to 1.

The basic functionality is thus:

$ local tag="${BASHLOG_SYSLOG_TAG:-$(basename "${0}")}";
$ local facility="${BASHLOG_SYSLOG_FACILITY:-local0}";
$ local pid="${$}";
$ logger --id="${pid}" -t "${tag}" -p "${facility}.${severity}" "${syslog_line}"

String (Default: local0)

The syslog facility to specify when using SYSLOG type logging.

String (Default: $(basename $0))

The syslog tag to specify when using SYSLOG type logging.

Defaults to the PID of the calling process.

Switch a version to use

If no parameter is passed, the version to use is resolved automatically via .terraform-version files or TFENV_TERRAFORM_VERSION environment variable (TFENV_TERRAFORM_VERSION takes precedence), defaulting to 'latest' if none are found.

latest is a syntax to use the latest installed version

latest:<regex> is a syntax to use latest installed version matching regex (used by grep -e)

min-required will switch to the version minimally required by your terraform sources (see above tfenv install)

$ tfenv use
$ tfenv use min-required
$ tfenv use 0.7.0
$ tfenv use latest
$ tfenv use latest:^0.8

Uninstall a specific version of Terraform latest is a syntax to uninstall latest version latest:<regex> is a syntax to uninstall latest version matching regex (used by grep -e)

$ tfenv uninstall 0.7.0
$ tfenv uninstall latest
$ tfenv uninstall latest:^0.8

List installed versions

$ tfenv list
* 0.10.7 (set by /opt/tfenv/version)
  0.9.0-beta2
  0.8.8
  0.8.4
  0.7.0
  0.7.0-rc4
  0.6.16
  0.6.2
  0.6.1

List installable versions

$ tfenv list-remote
0.9.0-beta2
0.9.0-beta1
0.8.8
0.8.7
0.8.6
0.8.5
0.8.4
0.8.3
0.8.2
0.8.1
0.8.0
0.8.0-rc3
0.8.0-rc2
0.8.0-rc1
0.8.0-beta2
0.8.0-beta1
0.7.13
0.7.12
...

If you put a .terraform-version file on your project root, or in your home directory, tfenv detects it and uses the version written in it. If the version is latest or latest:<regex>, the latest matching version currently installed will be selected.

Note, that TFENV_TERRAFORM_VERSION environment variable can be used to override version, specified by .terraform-version file.

$ cat .terraform-version
0.6.16

$ terraform version
Terraform v0.6.16

Your version of Terraform is out of date! The latest version
is 0.7.3. You can update by downloading from www.terraform.io

$ echo 0.7.3 > .terraform-version

$ terraform version
Terraform v0.7.3

$ echo latest:^0.8 > .terraform-version

$ terraform version
Terraform v0.8.8

$ TFENV_TERRAFORM_VERSION=0.7.3 terraform --version
Terraform v0.7.3

$ git --git-dir=~/.tfenv/.git pull

$ rm -rf /some/path/to/tfenv

• tfenv itself
• rbenv
  • tfenv partially uses rbenv's source code