name: Prepare RAM CI environment
description: Configure RAM-backed CI directories and Nexus package proxies

runs:
  using: composite

  steps:
    - name: Configure RAM CI environment
      shell: bash
      run: |
        set -euo pipefail
        set +x

        require_value() {
          local name="$1"
          local value="$2"

          if [ -z "$value" ]; then
            echo "ERROR: required CI value is empty: $name"
            exit 1
          fi
        }

        require_value "NEXUS_CARGO_URL" "$NEXUS_CARGO_URL"
        require_value "NEXUS_MAVEN_URL" "$NEXUS_MAVEN_URL"
        require_value "NEXUS_NPM_URL" "$NEXUS_NPM_URL"
        require_value "NEXUS_NODEJS_URL" "$NEXUS_NODEJS_URL"

        normalize_url() {
          local value="$1"

          value="${value//$'\r'/}"
          value="${value//$'\n'/}"

          case "$value" in
            \"*\")
              value="${value#\"}"
              value="${value%\"}"
              ;;
            \'*\')
              value="${value#\'}"
              value="${value%\'}"
              ;;
          esac

          printf '%s' "$value"
        }

        NEXUS_CARGO_URL="$(normalize_url "$NEXUS_CARGO_URL")"
        NEXUS_MAVEN_URL="$(normalize_url "$NEXUS_MAVEN_URL")"
        NEXUS_NPM_URL="$(normalize_url "$NEXUS_NPM_URL")"
        NEXUS_NODEJS_URL="$(normalize_url "$NEXUS_NODEJS_URL")"

        NEXUS_CARGO_URL="${NEXUS_CARGO_URL%/}/"
        NEXUS_MAVEN_URL="${NEXUS_MAVEN_URL%/}/"
        NEXUS_NPM_URL="${NEXUS_NPM_URL%/}/"
        NEXUS_NODEJS_URL="${NEXUS_NODEJS_URL%/}/"

        CI_ROOT="$GITHUB_WORKSPACE/.ci"

        CI_HOME="$CI_ROOT/home"
        CI_TMP="$CI_ROOT/tmp"
        CI_BIN="$CI_ROOT/bin"

        NPM_CONFIG_USERCONFIG="$CI_ROOT/npmrc"
        NPM_CACHE="$CI_ROOT/npm-cache"

        COREPACK_HOME="$CI_ROOT/corepack"
        PNPM_HOME="$CI_ROOT/pnpm-home"

        GRADLE_USER_HOME="$CI_ROOT/gradle"

        CARGO_HOME="$CI_ROOT/cargo"
        CARGO_TARGET_DIR="$CI_ROOT/cargo-target"
        RUSTUP_HOME="$CI_ROOT/rustup"

        XDG_CACHE_HOME="$CI_ROOT/xdg-cache"
        XDG_CONFIG_HOME="$CI_ROOT/xdg-config"
        XDG_DATA_HOME="$CI_ROOT/xdg-data"

        mkdir -p \
          "$CI_HOME" \
          "$CI_TMP" \
          "$CI_BIN" \
          "$NPM_CACHE" \
          "$COREPACK_HOME" \
          "$PNPM_HOME" \
          "$GRADLE_USER_HOME/init.d" \
          "$CARGO_HOME" \
          "$CARGO_TARGET_DIR" \
          "$RUSTUP_HOME" \
          "$XDG_CACHE_HOME" \
          "$XDG_CONFIG_HOME" \
          "$XDG_DATA_HOME"

        chmod 700 \
          "$CI_HOME" \
          "$GRADLE_USER_HOME" \
          "$CARGO_HOME" \
          "$RUSTUP_HOME"

        cat > "$NPM_CONFIG_USERCONFIG" <<EOF
        registry=$NEXUS_NPM_URL
        cache=$NPM_CACHE
        EOF

        chmod 600 "$NPM_CONFIG_USERCONFIG"

        {
          printf '%s\n' '[source.crates-io]'
          printf '%s\n' 'replace-with = "cargo-proxy"'
          printf '\n'
          printf '%s\n' '[source.cargo-proxy]'
          printf 'registry = "sparse+%s"\n' "$NEXUS_CARGO_URL"
        } > "$CARGO_HOME/config.toml"

        chmod 600 "$CARGO_HOME/config.toml"

        if [ "$(wc -l < "$CARGO_HOME/config.toml")" -ne 5 ]; then
          echo "ERROR: generated Cargo config has unexpected line count"
          nl -ba "$CARGO_HOME/config.toml"
          exit 1
        fi

        cat > "$GRADLE_USER_HOME/init.d/00-nexus.init.gradle" <<'EOF'
        def nexusUrl = System.getenv("NEXUS_MAVEN_URL")

        if (nexusUrl == null || nexusUrl.isBlank()) {
            throw new GradleException(
                "NEXUS_MAVEN_URL is not configured"
            )
        }

        def configureNexusRepository = { repositories ->
            repositories.maven {
                name = "CI_NEXUS"
                url = uri(nexusUrl)
                allowInsecureProtocol =
                    nexusUrl.startsWith("http://")

            }
        }

        gradle.beforeSettings { settings ->
            configureNexusRepository(
                settings.pluginManagement.repositories
            )

            configureNexusRepository(
                settings.dependencyResolutionManagement.repositories
            )
        }
        EOF

        chmod 600 \
          "$GRADLE_USER_HOME/init.d/00-nexus.init.gradle"

        {
          echo "CI_ROOT=$CI_ROOT"
          echo "CI_BIN=$CI_BIN"

          echo "HOME=$CI_HOME"
          echo "TMPDIR=$CI_TMP"

          echo "XDG_CACHE_HOME=$XDG_CACHE_HOME"
          echo "XDG_CONFIG_HOME=$XDG_CONFIG_HOME"
          echo "XDG_DATA_HOME=$XDG_DATA_HOME"

          echo "NPM_CONFIG_USERCONFIG=$NPM_CONFIG_USERCONFIG"
          echo "NPM_CONFIG_CACHE=$NPM_CACHE"
          echo "npm_config_cache=$NPM_CACHE"

          echo "COREPACK_HOME=$COREPACK_HOME"
          echo "COREPACK_NPM_REGISTRY=$NEXUS_NPM_URL"

          echo "PNPM_HOME=$PNPM_HOME"
          echo "PNPM_CONFIG_REGISTRY=$NEXUS_NPM_URL"

          echo "GRADLE_USER_HOME=$GRADLE_USER_HOME"

          echo "CARGO_HOME=$CARGO_HOME"
          echo "CARGO_TARGET_DIR=$CARGO_TARGET_DIR"
          echo "RUSTUP_HOME=$RUSTUP_HOME"

          echo "NVM_NODEJS_ORG_MIRROR=$NEXUS_NODEJS_URL"

          echo "NEXUS_CARGO_URL=$NEXUS_CARGO_URL"
          echo "NEXUS_MAVEN_URL=$NEXUS_MAVEN_URL"
          echo "NEXUS_NPM_URL=$NEXUS_NPM_URL"
          echo "NEXUS_NODEJS_URL=$NEXUS_NODEJS_URL"
        } >> "$GITHUB_ENV"

        {
          echo "$CI_BIN"
          echo "$PNPM_HOME"
        } >> "$GITHUB_PATH"

        echo "CI package environment prepared."