Create install-terraform.sh

Add macOS / Linux install script to easily install the latest Terraform version to the /usr/local/bin directory

terraform-tips/install/install-terraform.sh

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+#!/bin/bash
+
+# **********************************************************
+# This script will install the latest version of Terraform and
+# supports both Linux and macOS, on both AMD64 and ARM hardware
+# platforms. Run the script and it will determine your platform
+# automatically, download the latest release version of HashiCorp
+# Terraform, and install it in the '/usr/local/bin' folder so you
+# can run 'terraform' locally.
+#
+# Original Source:
+# https://github.com/Build5Nines/terraform-quickstart-templates/blob/main/terraform-tips/install/install-terraform.sh
+#
+# Copyright (c) 2024 Build5Nines LLC (https://build5nines.com)
+# License: MIT License (https://github.com/Build5Nines/terraform-quickstart-templates/blob/main/LICENSE)
+# **********************************************************
+
+to_lowercase() {
+    echo "$1" | tr '[:upper:]' '[:lower:]'
+}
+
+# Function to get all available Terraform versions
+get_available_versions() {
+    echo "Retreiving available Terraform versions..."
+    if [[ $(uname) == "Darwin" ]]; then
+        curl -s https://releases.hashicorp.com/terraform/ | grep -oE 'terraform_[^<]+' | cut -d '_' -f 2 | sort -V
+    else
+        curl -s https://releases.hashicorp.com/terraform/ | grep -oP 'terraform_[^<]+' | cut -d '_' -f 2 | sort -V
+    fi
+}
+
+get_architecture() {
+    if [[ $(uname -m) == "x86_64" ]]; then
+        echo "$(uname)_amd64"
+    else
+        echo "$(uname)_arm64"
+    fi
+}
+
+available_versions=$(get_available_versions)
+
+# Filter out alpha and beta versions
+filtered_versions=$(echo "$available_versions" | grep -v -E 'alpha|beta|rc')
+
+# Get the most recent stable version
+latest_version=$(echo "$filtered_versions" | tail -n 1)
+
+architecture=$(to_lowercase "$(get_architecture)")
+
+echo "Downloading latest Terraform version (v$latest_version) for $architecture..."
+download_url=https://releases.hashicorp.com/terraform/${latest_version}/terraform_${latest_version}_${architecture}.zip
+#download_url=$(to_lowercase "$download_url")
+# echo $download_url
+
+output_dir=/usr/local/bin
+output_zip=${output_dir}/terraform_${latest_version}_${architecture}.zip
+
+curl ${download_url} -o ${output_zip}
+
+unzip "${output_zip}" -d ${output_dir}
+
+rm ${output_zip}
+
+echo "Terraform v$latest_version has been installed."
+