Usage: ./tf-apply-file.sh example.tf

tf-apply-file.sh

#!/bin/bash

set -euo pipefail

if [ $# -eq 0 ]; then
  echo "Usage: $0 <terraform-file.tf> [additional-terraform-args]"
  exit 1
fi

# Check if terraform is available
if ! command -v terraform &> /dev/null; then
  echo "Error: terraform command not found"
  exit 1
fi

TF_FILE="$1"
shift

if [ ! -f "$TF_FILE" ]; then
  echo "Error: File '$TF_FILE' not found"
  exit 1
fi

# Extract resource names from the terraform file
RESOURCE_LIST=($(grep -E '^resource\s+"[^"]*"\s+"[^"]*"' "$TF_FILE" | sed -E 's/^resource[[:space:]]+"([^"]+)"[[:space:]]+"([^"]+)".*/\1.\2/'))

if [ ${#RESOURCE_LIST[@]} -eq 0 ]; then
  echo "No resources found in $TF_FILE"
  exit 1
fi

if [ ${#RESOURCE_LIST[@]} -eq 1 ]; then
  # Auto-select single resource
  selected_resource="${RESOURCE_LIST[0]}"
  echo "Applying target: $selected_resource"
  terraform apply -target="$selected_resource" "$@"
else
  # Use fzf for selection if available, otherwise fallback to menu
  if command -v fzf &> /dev/null; then
    # Create options array with "Apply all" option
    options=("${RESOURCE_LIST[@]}" "Apply all resources")

    selected=$(printf "%s\n" "${options[@]}" | fzf --prompt="Select resource to apply: ")

    if [ -z "$selected" ]; then
      echo "No selection made"
      exit 1
    elif [ "$selected" = "Apply all resources" ]; then
      # Apply all resources
      TARGETS=()
      for resource in "${RESOURCE_LIST[@]}"; do
        TARGETS+=("-target=$resource")
      done
      echo "Applying all targets: ${RESOURCE_LIST[*]}"
      terraform apply "${TARGETS[@]}" "$@"
    else
      # Apply selected resource
      echo "Applying target: $selected"
      terraform apply -target="$selected" "$@"
    fi
  else
    # Fallback to numbered menu
    echo "Found ${#RESOURCE_LIST[@]} resources in $TF_FILE:"
    for i in "${!RESOURCE_LIST[@]}"; do
      echo "$((i + 1)). ${RESOURCE_LIST[i]}"
    done
    echo "$((${#RESOURCE_LIST[@]} + 1)). Apply all resources"

    read -p "Select resource to apply (1-$((${#RESOURCE_LIST[@]} + 1))): " choice

    if [[ "$choice" -eq $((${#RESOURCE_LIST[@]} + 1)) ]]; then
      # Apply all resources
      TARGETS=()
      for resource in "${RESOURCE_LIST[@]}"; do
        TARGETS+=("-target=$resource")
      done
      echo "Applying all targets: ${RESOURCE_LIST[*]}"
      terraform apply "${TARGETS[@]}" "$@"
    elif [[ "$choice" -ge 1 && "$choice" -le ${#RESOURCE_LIST[@]} ]]; then
      # Apply selected resource
      selected_resource="${RESOURCE_LIST[$((choice - 1))]}"
      echo "Applying target: $selected_resource"
      terraform apply -target="$selected_resource" "$@"
    else
      echo "Invalid selection"
      exit 1
    fi
  fi
fi