chore: Improved code structure (moved hooks into a separate dir) (#316)

hooks/terraform_fmt.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+# shellcheck disable=SC2155 # No way to assign to readonly variable in separate lines
+readonly SCRIPT_DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
+# shellcheck source=_common.sh
+. "$SCRIPT_DIR/_common.sh"
+
+function main {
+  common::initialize "$SCRIPT_DIR"
+  common::parse_cmdline "$@"
+  # shellcheck disable=SC2153 # False positive
+  terraform_fmt_ "${ARGS[*]}" "${FILES[@]}"
+}
+
+function terraform_fmt_ {
+  local -r args="$1"
+  shift 1
+  local -a -r files=("$@")
+  # consume modified files passed from pre-commit so that
+  # hook runs against only those relevant directories
+  local index=0
+  for file_with_path in "${files[@]}"; do
+    file_with_path="${file_with_path// /__REPLACED__SPACE__}"
+
+    dir_paths[index]=$(dirname "$file_with_path")
+    # TODO Unique part
+    if [[ "$file_with_path" == *".tfvars" ]]; then
+      tfvars_files+=("$file_with_path")
+    fi
+    #? End for unique part
+    ((index += 1))
+  done
+
+  # preserve errexit status
+  shopt -qo errexit && ERREXIT_IS_SET=true
+  # allow hook to continue if exit_code is greater than 0
+  set +e
+  local final_exit_code=0
+
+  # run hook for each path
+  for dir_path in $(echo "${dir_paths[*]}" | tr ' ' '\n' | sort -u); do
+    dir_path="${dir_path//__REPLACED__SPACE__/ }"
+    pushd "$dir_path" > /dev/null || continue
+
+    per_dir_hook_unique_part "$args" "$dir_path"
+
+    local exit_code=$?
+    if [ $exit_code -ne 0 ]; then
+      final_exit_code=$exit_code
+    fi
+
+    popd > /dev/null
+  done
+
+  # TODO: Unique part
+  # terraform.tfvars are excluded by `terraform fmt`
+  for tfvars_file in "${tfvars_files[@]}"; do
+    tfvars_file="${tfvars_file//__REPLACED__SPACE__/ }"
+
+    terraform fmt "${ARGS[@]}" "$tfvars_file"
+    local exit_code=$?
+    if [ $exit_code -ne 0 ]; then
+      final_exit_code=$exit_code
+    fi
+  done
+  #? End for unique part
+  # restore errexit if it was set before the "for" loop
+  [[ $ERREXIT_IS_SET ]] && set -e
+  # return the hook final exit_code
+  exit $final_exit_code
+
+}
+
+function per_dir_hook_unique_part {
+  # common logic located in common::per_dir_hook
+  local -r args="$1"
+  local -r dir_path="$2"
+
+  # pass the arguments to hook
+  # shellcheck disable=SC2068 # hook fails when quoting is used ("$arg[@]")
+  terraform fmt ${args[@]}
+
+  # return exit code to common::per_dir_hook
+  local exit_code=$?
+  return $exit_code
+}
+
+[ "${BASH_SOURCE[0]}" != "$0" ] || main "$@"