Initialize terraform environment

tf-init.sh

#!/bin/bash

set -o errexit
set -o nounset
set -o pipefail

readonly TF_VERSION="v0.11"


output_line() {
    local message=$1
    if [[ $(tty -s) -ne 0 ]]; then
        echo "$message"
    else
        echo -e "\033[1m\033[32m[+] $message\033[0m"
    fi
}

handle_version() {
    declare terraform_path
    declare -a terraform_version_output

    terraform_path=$(command -v terraform)

    [[ ! -f ${terraform_path} ]] && {
        echo "Terraform not found. Please run: brew install terraform@${TF_VERSION:1}"
        exit 1
    }

    while IFS='' read -r line; do 
        terraform_version_output+=("$line"); 
    done < <(${terraform_path} version)
    current_version=${terraform_version_output[1]%.*}

    if [[ $current_version != "${TF_VERSION}" ]]; then
        echo "Wrong version detected. You need to install ${TF_VERSION}. Exiting"
        exit 1
    fi
}

handle_region() {
    # The terraform-provicer-ct below is not managed automatically by terraform init
    # https://github.com/poseidon/terraform-provider-ct
    readonly TF_CT_VERSION="v0.4.0"
    readonly TF_CT_SHASUM="dec5b2735b45b06d9c30ba87e05ebf119c02d2e4facadf4cd79befde9b1fbcce"

    output_line "Initializing $folder config"
    if [[ ! -f .terraform/plugins/darwin_amd64/terraform-provider-ct_${TF_CT_VERSION} ]]; then
        mkdir -p .terraform/plugins/darwin_amd64 &>/dev/null
        cd .terraform/plugins/darwin_amd64 &>/dev/null
        curl -s -L -O https://github.com/poseidon/terraform-provider-ct/releases/download/${TF_CT_VERSION}/terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64.tar.gz
        tar xzC . -f terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64.tar.gz terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64/terraform-provider-ct
        mv terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64/terraform-provider-ct ./terraform-provider-ct_${TF_CT_VERSION}
        rm -rf terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64/ terraform-provider-ct-${TF_CT_VERSION}-darwin-amd64.tar.gz
        if ! echo "${TF_CT_SHASUM} ${PWD}/terraform-provider-ct_${TF_CT_VERSION}" |
            sha256sum  --check --quiet; then
            echo "Wrong provider sum. Exiting"
            exit 1
        fi
    fi
    terraform init -upgrade
    cd - &>/dev/null
}

handle_global() {
    output_line "Initializing $folder config"
    terraform init -upgrade
}

main() {
    handle_version

    declare -a folders=("global" "region")

    for folder in "${folders[@]}"; do
        pushd "$folder" &>/dev/null
        if [[ $folder == "region" ]];  then
            handle_region
        elif [[ $folder == "global" ]]; then
            handle_global
        fi
        popd &>/dev/null
    done

    output_line "Terraform configuration completed"
}

if [[ "${BASH_SOURCE[0]}" = "$0" ]]; then
    main
fi

Validated using shellcheck linter

$ shellcheck tf-init.sh
$ echo $?
0