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

hooks/_common.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+function common::initialize {
+  local -r script_dir=$1
+  # source getopt function
+  # shellcheck source=lib_getopt
+  . "$script_dir/../lib_getopt"
+}
+
+function common::parse_cmdline {
+  # common global arrays.
+  # Populated via `common::parse_cmdline` and can be used inside hooks' functions
+  declare -g -a ARGS=() HOOK_CONFIG=() FILES=()
+
+  local argv
+  argv=$(getopt -o a:,h: --long args:,hook-config: -- "$@") || return
+  eval "set -- $argv"
+
+  for argv; do
+    case $argv in
+      -a | --args)
+        shift
+        ARGS+=("$1")
+        shift
+        ;;
+      -h | --hook-config)
+        shift
+        HOOK_CONFIG+=("$1;")
+        shift
+        ;;
+      --)
+        shift
+        # shellcheck disable=SC2034 # Variable is used
+        FILES=("$@")
+        break
+        ;;
+    esac
+  done
+}
+
+function common::per_dir_hook {
+  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")
+
+    ((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
+
+  # restore errexit if it was set before the "for" loop
+  [[ $ERREXIT_IS_SET ]] && set -e
+  # return the hook final exit_code
+  exit $final_exit_code
+}
+
+function common::colorify {
+  # shellcheck disable=SC2034
+  local -r red="\e[0m\e[31m"
+  # shellcheck disable=SC2034
+  local -r green="\e[0m\e[32m"
+  # shellcheck disable=SC2034
+  local -r yellow="\e[0m\e[33m"
+  # Color reset
+  local -r RESET="\e[0m"
+
+  # Params start #
+  local COLOR="${!1}"
+  local -r TEXT=$2
+  # Params end #
+
+  if [ "$PRE_COMMIT_COLOR" = "never" ]; then
+    COLOR=$RESET
+  fi
+
+  echo -e "${COLOR}${TEXT}${RESET}"
+}