# =========================================================================================
# Copyright (C) 2021 Orange
#
# This program is free software; you can redistribute it and/or modify it under the terms 
# of the GNU Lesser General Public License as published by the Free Software Foundation; 
# either version 3 of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along with this 
# program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth 
# Floor, Boston, MA  02110-1301, USA.
# =========================================================================================
variables:
  # Default Docker image (can be overriden)
  GITLEAKS_IMAGE: "zricethezav/gitleaks:latest"
  GITLEAKS_ARGS: "--verbose"
  GITLEAKS_QUICK_DEPTH: "10"
  GITLEAKS_QUICK_ARGS: "--verbose"
  # default production ref name (pattern)
  PROD_REF: '/^master$/'
  # default integration ref name (pattern)
  INTEG_REF: '/^develop$/'

# allowed stages depend on your template type (see: orange-opensource.gitlab.io/tbc/doc/dev-guidelines/#stages)
stages:
  - test

.gitleaks-scripts: &gitleaks-scripts |
  # BEGSCRIPT
  set -e

  function log_info() {
      echo -e "[\\e[1;94mINFO\\e[0m] $*"
  }

  function log_warn() {
      echo -e "[\\e[1;93mWARN\\e[0m] $*"
  }

  function log_error() {
      echo -e "[\\e[1;91mERROR\\e[0m] $*"
  }

  function assert_defined() {
    if [[ -z "$1" ]]
    then
      log_error "$2"
      exit 1
    fi
  }

  function install_ca_certs() {
    certs=$1
    if [[ -z "$certs" ]]
    then
      return
    fi

    # import in system
    if echo "$certs" >> /etc/ssl/certs/ca-certificates.crt
    then
      log_info "CA certificates imported in \\e[33;1m/etc/ssl/certs/ca-certificates.crt\\e[0m"
    fi
    if echo "$certs" >> /etc/ssl/cert.pem
    then
      log_info "CA certificates imported in \\e[33;1m/etc/ssl/cert.pem\\e[0m"
    fi
  }

  function unscope_variables() {
    _scoped_vars=$(env | awk -F '=' "/^scoped__[a-zA-Z0-9_]+=/ {print \$1}" | sort)
    if [[ -z "$_scoped_vars" ]]; then return; fi
    log_info "Processing scoped variables..."
    for _scoped_var in $_scoped_vars
    do
      _fields=${_scoped_var//__/:}
      _condition=$(echo "$_fields" | cut -d: -f3)
      case "$_condition" in
      if) _not="";;
      ifnot) _not=1;;
      *)
        log_warn "... unrecognized condition \\e[1;91m$_condition\\e[0m in \\e[33;1m${_scoped_var}\\e[0m"
        continue
      ;;
      esac
      _target_var=$(echo "$_fields" | cut -d: -f2)
      _cond_var=$(echo "$_fields" | cut -d: -f4)
      _cond_val=$(eval echo "\$${_cond_var}")
      _test_op=$(echo "$_fields" | cut -d: -f5)
      case "$_test_op" in
      defined)
        if [[ -z "$_not" ]] && [[ -z "$_cond_val" ]]; then continue; 
        elif [[ "$_not" ]] && [[ "$_cond_val" ]]; then continue; 
        fi
        ;;
      equals|startswith|endswith|contains|in|equals_ic|startswith_ic|endswith_ic|contains_ic|in_ic)
        # comparison operator
        # sluggify actual value
        _cond_val=$(echo "$_cond_val" | tr '[:punct:]' '_')
        # retrieve comparison value
        _cmp_val_prefix="scoped__${_target_var}__${_condition}__${_cond_var}__${_test_op}__"
        _cmp_val=${_scoped_var#$_cmp_val_prefix}
        # manage 'ignore case'
        if [[ "$_test_op" == *_ic ]]
        then
          # lowercase everything
          _cond_val=$(echo "$_cond_val" | tr '[:upper:]' '[:lower:]')
          _cmp_val=$(echo "$_cmp_val" | tr '[:upper:]' '[:lower:]')
        fi
        case "$_test_op" in
        equals*)
          if [[ -z "$_not" ]] && [[ "$_cond_val" != "$_cmp_val" ]]; then continue; 
          elif [[ "$_not" ]] && [[ "$_cond_val" == "$_cmp_val" ]]; then continue; 
          fi
          ;;
        startswith*)
          if [[ -z "$_not" ]] && [[ "$_cond_val" != "$_cmp_val"* ]]; then continue; 
          elif [[ "$_not" ]] && [[ "$_cond_val" == "$_cmp_val"* ]]; then continue; 
          fi
          ;;
        endswith*)
          if [[ -z "$_not" ]] && [[ "$_cond_val" != *"$_cmp_val" ]]; then continue; 
          elif [[ "$_not" ]] && [[ "$_cond_val" == *"$_cmp_val" ]]; then continue; 
          fi
          ;;
        contains*)
          if [[ -z "$_not" ]] && [[ "$_cond_val" != *"$_cmp_val"* ]]; then continue; 
          elif [[ "$_not" ]] && [[ "$_cond_val" == *"$_cmp_val"* ]]; then continue; 
          fi
          ;;
        in*)
          if [[ -z "$_not" ]] && [[ "__${_cmp_val}__" != *"__${_cond_val}__"* ]]; then continue; 
          elif [[ "$_not" ]] && [[ "__${_cmp_val}__" == *"__${_cond_val}__"* ]]; then continue; 
          fi
          ;;
        esac
        ;;
      *)
        log_warn "... unrecognized test operator \\e[1;91m${_test_op}\\e[0m in \\e[33;1m${_scoped_var}\\e[0m"
        continue
        ;;
      esac
      # matches
      _val=$(eval echo "\$${_target_var}")
      log_info "... apply \\e[32m${_target_var}\\e[0m from \\e[32m\$${_scoped_var}\\e[0m${_val:+ (\\e[33;1moverwrite\\e[0m)}"
      _val=$(eval echo "\$${_scoped_var}")
      export "${_target_var}"="${_val}"
    done
    log_info "... done"
  }

  function install_gitleaks_rules() {
    # If present, import gitleaks rules found inside the git repository (in place of the default + Orange rules)
    if [[ -f ".gitleaks.toml" ]]
    then
      log_info "Using custom Gitleaks rules from project (\\e[33;1m.gitleaks.toml\\e[0m)"
      cp .gitleaks.toml ./gitleaks/rules.toml
      export gitleaks_rule_opts="--config-path=./gitleaks/rules.toml"
    elif [[ "$GITLEAKS_RULES" ]]
    then
      log_info "Using Gitleaks rules from env (\\e[33;1m\$GITLEAKS_RULES\\e[0m)"
      echo "$GITLEAKS_RULES" > ./gitleaks/rules.toml
      export gitleaks_rule_opts="--config-path=./gitleaks/rules.toml"
    else
      log_info "No Gitleaks rules found: use default"
    fi
  }

  function get_latest_template_version() {
    tag_json=$(wget -T 5 -q -O - "$CI_API_V4_URL/projects/Orange-OpenSource%2Ftbc%2F$1/repository/tags?per_page=1" || echo "")
    echo "$tag_json" | sed -rn 's/^.*"name":"([^"]*)".*$/\1/p'
  }

  function check_for_update() {
    template="$1"
    actual="$2"
    latest=$(get_latest_template_version "$template")
    if [[ -n "$latest" ]] && [[ "$latest" != "$actual" ]]
    then
      log_warn "\\e[1;93m=======================================================================================================\\e[0m"
      log_warn "\\e[93mThe template \\e[32m$template\\e[93m:\\e[33m$actual\\e[93m you're using is not up-to-date: consider upgrading to version \\e[32m$latest\\e[0m"
      log_warn "\\e[93m(set \$TEMPLATE_CHECK_UPDATE_DISABLED to disable this message)\\e[0m"
      log_warn "\\e[1;93m=======================================================================================================\\e[0m"
    fi
  }

  if [[ -z "$TEMPLATE_CHECK_UPDATE_DISABLED" ]]; then check_for_update gitleaks "1.1.1"; fi
  unscope_variables

  # ENDSCRIPT

# full analysis on master and develop branches
gitleaks:
  image:
    name: $GITLEAKS_IMAGE
    entrypoint: [""]
  services:
    - name: "$CI_REGISTRY/orange-opensource/tbc/tools/tracking:master"
      command: ["--service", "gitleaks", "1.1.1"]
  stage: test
  variables:
    GIT_DEPTH: 0
  before_script:
    - *gitleaks-scripts
    - install_ca_certs "${CUSTOM_CA_CERTS:-$DEFAULT_CA_CERTS}"
    - mkdir -p ./gitleaks
    - install_gitleaks_rules
  script:
    - gitleaks ${TRACE+--debug} --path=. $gitleaks_rule_opts --report=./gitleaks/gitleaks-report.json $GITLEAKS_ARGS
  artifacts:
    name: "$CI_JOB_NAME artifacts from $CI_PROJECT_NAME on $CI_COMMIT_REF_SLUG"
    when: always
    paths:
      - gitleaks/
  rules:
    # exclude merge requests
    - if: $CI_MERGE_REQUEST_ID
      when: never
    # on production and integration branch(es)
    - if: '$CI_COMMIT_REF_NAME =~ $INTEG_REF || $CI_COMMIT_REF_NAME =~ $PROD_REF'

# quick analysis on dev branches
gitleaks-quick:
  extends: gitleaks
  variables:
    GIT_DEPTH: "${GITLEAKS_QUICK_DEPTH}"
  script:
    - gitleaks ${TRACE+--debug} --path=. $gitleaks_rule_opts --report=./gitleaks/gitleaks-report.json --depth=${GITLEAKS_QUICK_DEPTH} $GITLEAKS_QUICK_ARGS
  rules:
    # exclude merge requests
    - if: $CI_MERGE_REQUEST_ID
      when: never
    # only on non-production, non-integration branches
    - if: '$CI_COMMIT_REF_NAME !~ $PROD_REF && $CI_COMMIT_REF_NAME !~ $INTEG_REF'
      allow_failure: true
