lint/lib/functions/worker.sh

#!/usr/bin/env bash

function LintCodebase() {
  local FILE_TYPE
  FILE_TYPE="${1}" && shift
  local TEST_CASE_RUN
  TEST_CASE_RUN="${1}" && shift

  declare -n VALIDATE_LANGUAGE
  VALIDATE_LANGUAGE="VALIDATE_${FILE_TYPE}"

  if [[ "${VALIDATE_LANGUAGE}" == "false" ]]; then
    if [[ "${TEST_CASE_RUN}" == "false" ]]; then
      debug "Skip validation of ${FILE_TYPE} because VALIDATE_LANGUAGE is ${VALIDATE_LANGUAGE}"
      unset -n VALIDATE_LANGUAGE
      return 0
    else
      fatal "Don't disable any validation when running in test mode. VALIDATE_${FILE_TYPE} is set to: ${VALIDATE_LANGUAGE}. Set it to: true"
    fi
  fi

  debug "Running LintCodebase. FILE_TYPE: ${FILE_TYPE}. TEST_CASE_RUN: ${TEST_CASE_RUN}"

  debug "VALIDATE_LANGUAGE for ${FILE_TYPE}: ${VALIDATE_LANGUAGE}..."

  ValidateBooleanVariable "TEST_CASE_RUN" "${TEST_CASE_RUN}"
  ValidateBooleanVariable "VALIDATE_${FILE_TYPE}" "${VALIDATE_LANGUAGE}"

  unset -n VALIDATE_LANGUAGE

  debug "Populating file array for ${FILE_TYPE}"
  local -n FILE_ARRAY="FILE_ARRAY_${FILE_TYPE}"
  local FILE_ARRAY_LANGUAGE_PATH="${FILE_ARRAYS_DIRECTORY_PATH}/file-array-${FILE_TYPE}"
  if [[ -e "${FILE_ARRAY_LANGUAGE_PATH}" ]]; then
    while read -r FILE; do
      if [[ "${TEST_CASE_RUN}" == "true" ]]; then
        debug "Ensure that the list files to check for ${FILE_TYPE} doesn't include test cases for other languages"
        # Folder for specific tests. By convention, the last part of the path is the lowercased FILE_TYPE
        local TEST_CASE_DIRECTORY
        TEST_CASE_DIRECTORY="${FILE_TYPE,,}"

        # We use configuration files to pass the list of files to lint to checkov
        # Their name includes "checkov", which is equal to FILE_TYPE for Checkov.
        # In this case, we don't add a trailing slash so we don't fail validation.
        if [[ "${FILE_TYPE}" != "CHECKOV" ]]; then
          TEST_CASE_DIRECTORY="${TEST_CASE_DIRECTORY}/"
          debug "Adding a traling slash to the test case directory for ${FILE_TYPE}: ${TEST_CASE_DIRECTORY}"
        fi

        debug "TEST_CASE_DIRECTORY for ${FILE_TYPE}: ${TEST_CASE_DIRECTORY}"
        if [[ ${FILE} != *"${TEST_CASE_DIRECTORY}"* ]]; then
          debug "Excluding ${FILE} because it's not in the test case directory for ${FILE_TYPE}..."
          continue
        else
          debug "Including ${FILE} because it's a test case for ${FILE_TYPE}"
        fi
      fi
      FILE_ARRAY+=("${FILE}")
    done <"${FILE_ARRAY_LANGUAGE_PATH}"
  else
    debug "${FILE_ARRAY_LANGUAGE_PATH} doesn't exist. Skip loading the list of files and directories to lint for ${FILE_TYPE}"
  fi

  if [[ "${#FILE_ARRAY[@]}" -eq 0 ]]; then
    if [[ "${TEST_CASE_RUN}" == "false" ]]; then
      debug "There are no items to lint for ${FILE_TYPE}"
      unset -n FILE_ARRAY
      return 0
    else
      fatal "Cannot find any tests for ${FILE_TYPE}"
    fi
  else
    debug "There are ${#FILE_ARRAY[@]} items to lint for ${FILE_TYPE}: ${FILE_ARRAY[*]}"
  fi

  startGitHubActionsLogGroup "${FILE_TYPE}"

  info "Linting ${FILE_TYPE} items..."

  local PARALLEL_RESULTS_FILE_PATH
  PARALLEL_RESULTS_FILE_PATH="/tmp/super-linter-worker-results-${FILE_TYPE}.json"
  debug "PARALLEL_RESULTS_FILE_PATH for ${FILE_TYPE}: ${PARALLEL_RESULTS_FILE_PATH}"

  local -a PARALLEL_COMMAND
  PARALLEL_COMMAND=(parallel --will-cite --keep-order --max-procs "$(($(nproc) * 1))" --xargs --results "${PARALLEL_RESULTS_FILE_PATH}")

  if [ "${LOG_DEBUG}" == "true" ]; then
    debug "LOG_DEBUG is enabled. Enable verbose ouput for parallel"
    PARALLEL_COMMAND+=(--verbose)
  fi
  debug "PARALLEL_COMMAND for ${FILE_TYPE}: ${PARALLEL_COMMAND[*]}"

  # The following linters support linting one file at a time, and don't support linting a list of files,
  # so we cannot pass more than one file per invocation
  if [[ "${FILE_TYPE}" == "ANSIBLE" ]] ||
    [[ "${FILE_TYPE}" == "ARM" ]] ||
    [[ "${FILE_TYPE}" == "BASH_EXEC" ]] ||
    [[ "${FILE_TYPE}" == "CLOJURE" ]] ||
    [[ "${FILE_TYPE}" == "CSHARP" ]] ||
    [[ "${FILE_TYPE}" == "GITLEAKS" ]] ||
    [[ "${FILE_TYPE}" == "GO_MODULES" ]] ||
    [[ "${FILE_TYPE}" == "JSCPD" ]] ||
    [[ "${FILE_TYPE}" == "KOTLIN" ]] ||
    [[ "${FILE_TYPE}" == "SQL" ]] ||
    [[ "${FILE_TYPE}" == "SQLFLUFF" ]] ||
    [[ "${FILE_TYPE}" == "CHECKOV" ]] ||
    [[ "${FILE_TYPE}" == "POWERSHELL" ]] ||
    [[ "${FILE_TYPE}" == "R" ]] ||
    [[ "${FILE_TYPE}" == "RUST_CLIPPY" ]] ||
    [[ "${FILE_TYPE}" == "SNAKEMAKE_LINT" ]] ||
    [[ "${FILE_TYPE}" == "STATES" ]] ||
    [[ "${FILE_TYPE}" == "TERRAFORM_TFLINT" ]] ||
    [[ "${FILE_TYPE}" == "TERRAFORM_TERRASCAN" ]] ||
    [[ "${FILE_TYPE}" == "TERRAGRUNT" ]]; then
    debug "${FILE_TYPE} doesn't support linting files in batches. Configure the linter to run over the files to lint one by one"
    PARALLEL_COMMAND+=(--max-lines 1)
  fi
  debug "PARALLEL_COMMAND for ${FILE_TYPE} after updating the number of files to lint per process: ${PARALLEL_COMMAND[*]}"

  local LINTER_WORKING_DIRECTORY
  LINTER_WORKING_DIRECTORY="${GITHUB_WORKSPACE}"

  # GNU parallel parameter expansion:
  # - {} input item
  # - {/} basename of the input lint
  # - {//} dirname of input line

  if [[ ${FILE_TYPE} == "CSHARP" ]] ||
    [[ (${FILE_TYPE} == "R" && -f "$(dirname "${FILE}")/.lintr") ]] ||
    [[ ${FILE_TYPE} == "KOTLIN" ]] ||
    [[ ${FILE_TYPE} == "TERRAFORM_TFLINT" ]]; then
    LINTER_WORKING_DIRECTORY="{//}"
  elif [[ ${FILE_TYPE} == "ANSIBLE" ]] ||
    [[ ${FILE_TYPE} == "GO_MODULES" ]]; then
    LINTER_WORKING_DIRECTORY="{}"
  fi

  debug "LINTER_WORKING_DIRECTORY for ${FILE_TYPE}: ${LINTER_WORKING_DIRECTORY}"
  PARALLEL_COMMAND+=(--workdir "${LINTER_WORKING_DIRECTORY}")
  debug "PARALLEL_COMMAND for ${FILE_TYPE} after updating the working directory: ${PARALLEL_COMMAND[*]}"

  # shellcheck source=/dev/null
  source /action/lib/functions/linterCommands.sh

  local -n LINTER_COMMAND_ARRAY
  LINTER_COMMAND_ARRAY="LINTER_COMMANDS_ARRAY_${FILE_TYPE}"
  if [ ${#LINTER_COMMAND_ARRAY[@]} -eq 0 ]; then
    fatal "LINTER_COMMAND_ARRAY for ${FILE_TYPE} is empty."
  else
    debug "LINTER_COMMAND_ARRAY for ${FILE_TYPE} has ${#LINTER_COMMAND_ARRAY[@]} elements: ${LINTER_COMMAND_ARRAY[*]}"
  fi

  PARALLEL_COMMAND+=("${LINTER_COMMAND_ARRAY[@]}")
  debug "PARALLEL_COMMAND for ${FILE_TYPE} after LINTER_COMMAND_ARRAY concatenation: ${PARALLEL_COMMAND[*]}"

  unset -n LINTER_COMMAND_ARRAY

  local PARALLEL_COMMAND_OUTPUT
  local PARALLEL_COMMAND_RETURN_CODE
  PARALLEL_COMMAND_OUTPUT=$(printf "%s\n" "${FILE_ARRAY[@]}" | "${PARALLEL_COMMAND[@]}" 2>&1)
  # Don't check for errors on this return code because commands can fail if linter report errors
  PARALLEL_COMMAND_RETURN_CODE=$?
  debug "PARALLEL_COMMAND_OUTPUT for ${FILE_TYPE} (exit code: ${PARALLEL_COMMAND_RETURN_CODE}): ${PARALLEL_COMMAND_OUTPUT}"
  debug "Parallel output file (${PARALLEL_RESULTS_FILE_PATH}) contents for ${FILE_TYPE}:\n$(cat "${PARALLEL_RESULTS_FILE_PATH}")"

  echo ${PARALLEL_COMMAND_RETURN_CODE} >"/tmp/super-linter-parallel-command-exit-code-${FILE_TYPE}"

  if [ ${PARALLEL_COMMAND_RETURN_CODE} -ne 0 ]; then
    error "Found errors when linting ${FILE_TYPE}. Exit code: ${PARALLEL_COMMAND_RETURN_CODE}."
  else
    notice "${FILE_TYPE} linted successfully"
  fi

  local RESULTS_OBJECT
  RESULTS_OBJECT=
  if ! RESULTS_OBJECT=$(jq --raw-output -n '[inputs]' "${PARALLEL_RESULTS_FILE_PATH}"); then
    fatal "Error loading results for ${FILE_TYPE}: ${RESULTS_OBJECT}"
  fi
  debug "RESULTS_OBJECT for ${FILE_TYPE}:\n${RESULTS_OBJECT}"

  # To count how many files were checked for a given FILE_TYPE
  local INDEX
  INDEX=0
  if ! ((INDEX = $(jq '[.[] | .V | length] | add' <<<"${RESULTS_OBJECT}"))); then
    fatal "Error when setting INDEX for ${FILE_TYPE}: ${INDEX}"
  fi
  debug "Set INDEX for ${FILE_TYPE} to: ${INDEX}"

  local STDOUT_LINTER
  # Get raw output so we can strip quotes from the data we load. Also, strip the final newline to avoid adding it two times
  if ! STDOUT_LINTER="$(jq --raw-output '.[] | select(.Stdout[:-1] | length > 0) | .Stdout[:-1]' <<<"${RESULTS_OBJECT}")"; then
    fatal "Error when loading stdout for ${FILE_TYPE}:\n${STDOUT_LINTER}"
  fi

  if [ -n "${STDOUT_LINTER}" ]; then
    local STDOUT_LINTER_LOG_MESSAGE
    STDOUT_LINTER_LOG_MESSAGE="Command output for ${FILE_TYPE}:\n------\n${STDOUT_LINTER}\n------"
    info "${STDOUT_LINTER_LOG_MESSAGE}"

    if [ ${PARALLEL_COMMAND_RETURN_CODE} -ne 0 ]; then
      local STDOUT_LINTER_FILE_PATH
      STDOUT_LINTER_FILE_PATH="/tmp/super-linter-parallel-stdout-${FILE_TYPE}"
      debug "Saving stdout for ${FILE_TYPE} to ${STDOUT_LINTER_FILE_PATH} in case we need it later"
      printf '%s\n' "${STDOUT_LINTER_LOG_MESSAGE}" >"${STDOUT_LINTER_FILE_PATH}"
    fi
  else
    debug "Stdout for ${FILE_TYPE} is empty"
  fi

  local STDERR_LINTER
  if ! STDERR_LINTER="$(jq --raw-output '.[] | select(.Stderr[:-1] | length > 0) | .Stderr[:-1]' <<<"${RESULTS_OBJECT}")"; then
    fatal "Error when loading stderr for ${FILE_TYPE}:\n${STDERR_LINTER}"
  fi

  if [ -n "${STDERR_LINTER}" ]; then
    local STDERR_LINTER_LOG_MESSAGE
    STDERR_LINTER_LOG_MESSAGE="Stderr contents for ${FILE_TYPE}:\n------\n${STDERR_LINTER}\n------"
    info "${STDERR_LINTER_LOG_MESSAGE}"
    if [ ${PARALLEL_COMMAND_RETURN_CODE} -ne 0 ]; then
      local STDERR_LINTER_FILE_PATH
      STDERR_LINTER_FILE_PATH="/tmp/super-linter-parallel-stderr-${FILE_TYPE}"
      debug "Saving stderr for ${FILE_TYPE} to ${STDERR_LINTER_FILE_PATH} in case we need it later"
      printf '%s\n' "${STDERR_LINTER_LOG_MESSAGE}" >"${STDERR_LINTER_FILE_PATH}"
    fi
  else
    debug "Stderr for ${FILE_TYPE} is empty"
  fi

  unset -n FILE_ARRAY

  endGitHubActionsLogGroup "${FILE_TYPE}"
}

# We need this for parallel
export -f LintCodebase