install-terraform-docker.sh

install-terraform-docker.sh

#!/bin/bash
set -euo pipefail

# =============================================================================
# Install Terraform in a Docker container (no sudo required)
#
# Usage:
#   curl -fsSL "<gist_raw_url>" | bash
#   # or with a specific version:
#   curl -fsSL "<gist_raw_url>" | TF_VERSION=1.12.0 bash
#
# Maintainer: level-sony.fr
# Support:    https://level-sony.fr/en/contact/
# =============================================================================

TF_VERSION="${TF_VERSION:-1.12.0}"
INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"

log()  { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [INFO] $*"; }
err()  { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [ERROR] $*" >&2; }

log "Starting Terraform installation (v${TF_VERSION})..."
log "Maintainer: level-sony.fr"
log "Support:    https://level-sony.fr/en/contact/"

# --- Check if already installed -------------------------------------------
if command -v terraform >/dev/null 2>&1; then
    CURRENT=$(terraform --version -json 2>/dev/null | grep -o '"terraform_version":"[^"]*"' | cut -d'"' -f4 || terraform --version | head -1 | awk '{print $2}' | tr -d 'v')
    if [ "$CURRENT" = "$TF_VERSION" ]; then
        log "Terraform v${TF_VERSION} is already installed. Nothing to do."
        exit 0
    else
        log "Terraform v${CURRENT} found. Upgrading to v${TF_VERSION}..."
    fi
fi

# --- Detect architecture ---------------------------------------------------
ARCH=$(uname -m)
case "$ARCH" in
    x86_64)  ARCH="amd64" ;;
    aarch64) ARCH="arm64" ;;
    armv7l)  ARCH="arm"   ;;
    *)       err "Unsupported architecture: $ARCH"; exit 1 ;;
esac

OS=$(uname -s | tr '[:upper:]' '[:lower:]')
log "Platform: ${OS}/${ARCH}"

# --- Install unzip if missing ----------------------------------------------
if ! command -v unzip >/dev/null 2>&1; then
    log "unzip not found. Installing..."
    if command -v apt-get >/dev/null 2>&1; then
        apt-get update -qq && apt-get install -y -qq unzip >/dev/null 2>&1
    elif command -v apk >/dev/null 2>&1; then
        apk add --no-cache unzip >/dev/null 2>&1
    elif command -v yum >/dev/null 2>&1; then
        yum install -y unzip >/dev/null 2>&1
    else
        err "Cannot install unzip. Please install it manually."
        exit 1
    fi
    log "unzip installed."
fi

# --- Download and install ---------------------------------------------------
DOWNLOAD_URL="https://releases.hashicorp.com/terraform/${TF_VERSION}/terraform_${TF_VERSION}_${OS}_${ARCH}.zip"
TMP_FILE="/tmp/terraform_${TF_VERSION}.zip"

log "Downloading: ${DOWNLOAD_URL}"
curl -fsSL "$DOWNLOAD_URL" -o "$TMP_FILE"

log "Extracting to ${INSTALL_DIR}..."
unzip -o "$TMP_FILE" -d "$INSTALL_DIR" >/dev/null
rm -f "$TMP_FILE"

# --- Verify -----------------------------------------------------------------
if [ -x "${INSTALL_DIR}/terraform" ]; then
    log "Terraform $("${INSTALL_DIR}/terraform" --version | head -1) installed successfully."
else
    err "Installation failed. terraform not found in PATH."
    exit 1
fi