Host on GitLab Pages

variables:
  # Define tool versions
  DART_SASS_VERSION: 1.101.0
  GO_VERSION: 1.26.4
  HUGO_VERSION: 0.163.3
  NODE_VERSION: 24.16.0

  # Set the build timezone
  TZ: Europe/Oslo

  # Set the build cache directory
  HUGO_CACHEDIR: ${CI_PROJECT_DIR}/.cache/hugo

  # Set the repository clone and fetch strategy
  GIT_DEPTH: 0
  GIT_STRATEGY: clone
  GIT_SUBMODULE_STRATEGY: recursive
cache:
  key: ${CI_COMMIT_REF_SLUG}
  fallback_keys:
    - ${CI_DEFAULT_BRANCH}
  paths:
    - .cache/hugo
image:
  name: buildpack-deps:bookworm
pages:
  stage: deploy
  script:
    - chmod a+x build.sh && ./build.sh
  artifacts:
    paths:
      - public
  rules:
    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH

#!/usr/bin/env bash

#------------------------------------------------------------------------------
# @file
# Builds a Hugo project hosted on GitLab Pages.
#------------------------------------------------------------------------------

# Exit on error, undefined variables, or pipe failures
set -euo pipefail

# Perform cleanup
cleanup() {
  if [[ -n "${build_temp_dir:-}" && -d "${build_temp_dir}" ]]; then
    rm -rf "${build_temp_dir}"
  fi
}

# Register the cleanup trap
trap cleanup EXIT SIGINT SIGTERM

main() {
  # Create a temporary directory for downloads
  build_temp_dir=$(mktemp -d)

  # Create a local tools directory
  mkdir -p "${HOME}/.local"

  # Install utilities
  echo "Installing utilities..."
  apt-get update > /dev/null
  apt-get install -y brotli > /dev/null

  # Install Dart Sass
  echo "Installing Dart Sass ${DART_SASS_VERSION}..."
  curl -sfLO --output-dir "${build_temp_dir}" "https://github.com/sass/dart-sass/releases/download/${DART_SASS_VERSION}/dart-sass-${DART_SASS_VERSION}-linux-x64.tar.gz"
  tar -C "${HOME}/.local" -xf "${build_temp_dir}/dart-sass-${DART_SASS_VERSION}-linux-x64.tar.gz"
  export PATH="${HOME}/.local/dart-sass:${PATH}"

  # Install Go
  if [[ -f "${CI_PROJECT_DIR}/go.mod" ]]; then
    echo "Installing Go ${GO_VERSION}..."
    curl -sfLO --output-dir "${build_temp_dir}" "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz"
    tar -C "${HOME}/.local" -xf "${build_temp_dir}/go${GO_VERSION}.linux-amd64.tar.gz"
    export PATH="${HOME}/.local/go/bin:${PATH}"
  fi

  # Install Hugo
  echo "Installing Hugo ${HUGO_VERSION}..."
  curl -sfLO --output-dir "${build_temp_dir}" "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_VERSION}_linux-amd64.tar.gz"
  mkdir -p "${HOME}/.local/hugo"
  tar -C "${HOME}/.local/hugo" -xf "${build_temp_dir}/hugo_${HUGO_VERSION}_linux-amd64.tar.gz"
  export PATH="${HOME}/.local/hugo:${PATH}"

  # Install Node.js
  if [[ -f "${CI_PROJECT_DIR}/package-lock.json" ]]; then
    echo "Installing Node.js ${NODE_VERSION}..."
    curl -sfLO --output-dir "${build_temp_dir}" "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.gz"
    tar -C "${HOME}/.local" -xf "${build_temp_dir}/node-v${NODE_VERSION}-linux-x64.tar.gz"
    export PATH="${HOME}/.local/node-v${NODE_VERSION}-linux-x64/bin:${PATH}"
  fi

  # Log tool versions
  echo "Logging tool versions..."
  command -v sass &> /dev/null && echo "Dart Sass: $(sass --version)" || echo "Dart Sass: not installed"
  command -v go &> /dev/null && echo "Go: $(go version)" || echo "Go: not installed"
  command -v hugo &> /dev/null && echo "Hugo: $(hugo version)" || echo "Hugo: not installed"
  command -v node &> /dev/null && echo "Node.js: $(node --version)" || echo "Node.js: not installed"

  # Configure Git
  echo "Configuring Git..."
  git config --global core.quotepath false

  # Fetch full Git history
  if [[ $(git rev-parse --is-shallow-repository) == true ]]; then
    echo "Fetching full Git history..."
    git fetch --unshallow
  fi

  # Initialize Git submodules
  if [[ -f .gitmodules ]]; then
    echo "Initializing Git submodules..."
    git submodule update --init --recursive
  fi

  # Install Node.js dependencies
  if [[ -f package-lock.json ]]; then
    echo "Installing Node.js dependencies..."
    npm ci
  fi

  # Build the project
  echo "Building the project..."
  hugo build --gc --minify

  # Compress published files
  echo "Compressing published files..."
  find public/ -type f -regextype posix-extended -regex '.+\.(cjs|css|html|js|json|mjs|svg|txt|xml)$' -print0 > "${build_temp_dir}/files.txt"
  xargs --null --max-procs=0 --max-args=1 brotli --quality=10 --force --keep < "${build_temp_dir}/files.txt"
  xargs --null --max-procs=0 --max-args=1 gzip -9 --force --keep < "${build_temp_dir}/files.txt"
}

main "$@"