helm-chart/templates/gitea/config.yaml

apiVersion: v1
kind: Secret
metadata:
  name: {{ include "gitea.fullname" . }}-inline-config
  labels:
    {{- include "gitea.labels" . | nindent 4 }}
type: Opaque
stringData:
  {{- include "gitea.inline_configuration" . | nindent 2 }}
---
apiVersion: v1
kind: Secret
metadata:
  name: {{ include "gitea.fullname" . }}
  labels:
    {{- include "gitea.labels" . | nindent 4 }}
type: Opaque
stringData:
  config_environment.sh: |-
    #!/usr/bin/env bash
    set -euo pipefail

    function env2ini::log() {
      printf "${1}\n"
    }

    function env2ini::read_config_to_env() {
      local section="${1}"
      local line="${2}"

      if [[ -z "${line}" ]]; then
        # skip empty line
        return
      fi
      
      # 'xargs echo -n' trims all leading/trailing whitespaces and a trailing new line
      local setting="$(awk -F '=' '{print $1}' <<< "${line}" | xargs echo -n)"

      if [[ -z "${setting}" ]]; then
        env2ini::log '  ! invalid setting'
        exit 1
      fi

      local value=''
      local regex="^${setting}(\s*)=(\s*)(.*)"
      if [[ $line =~ $regex ]]; then
        value="${BASH_REMATCH[3]}"
      else
        env2ini::log '  ! invalid setting'
        exit 1
      fi

      env2ini::log "    + '${setting}'"

      if [[ -z "${section}" ]]; then
        export "ENV_TO_INI____${setting^^}=${value}"                           # '^^' makes the variable content uppercase
        return
      fi

      local masked_section="${section//./_0X2E_}"                            # '//' instructs to replace all matches
      masked_section="${masked_section//-/_0X2D_}"

      export "ENV_TO_INI__${masked_section^^}__${setting^^}=${value}"        # '^^' makes the variable content uppercase
    }

    function env2ini::process_config_file() {
      local config_file="${1}"
      local section="$(basename "${config_file}")"

      if [[ $section == '_generals_' ]]; then
        env2ini::log "  [ini root]"
        section=''
      else
        env2ini::log "  ${section}"
      fi

      while read -r line; do
        env2ini::read_config_to_env "${section}" "${line}"
      done < <(awk 1 "${config_file}")                             # Helm .toYaml trims the trailing new line which breaks line processing; awk 1 ... adds it back while reading
    }

    function env2ini::load_config_sources() {
      local path="${1}"

      env2ini::log "Processing $(basename "${path}")..."

      while read -d '' configFile; do
        env2ini::process_config_file "${configFile}"
      done < <(find "${path}" -type l -not -name '..data' -print0)

      env2ini::log "\n"
    }

    function env2ini::generate_initial_secrets() {
      # These environment variables will either be
      #   - overwritten with user defined values,
      #   - initially used to set up Gitea
      # Anyway, they won't harm existing app.ini files

      export ENV_TO_INI__SECURITY__INTERNAL_TOKEN=$(gitea generate secret INTERNAL_TOKEN)
      export ENV_TO_INI__SECURITY__SECRET_KEY=$(gitea generate secret SECRET_KEY)
      export ENV_TO_INI__OAUTH2__JWT_SECRET=$(gitea generate secret JWT_SECRET)

      env2ini::log "...Initial secrets generated\n"
    }

    # MUST BE CALLED BEFORE OTHER CONFIGURATION
    env2ini::generate_initial_secrets

    env2ini::load_config_sources '/env-to-ini-mounts/inlines/'
    env2ini::load_config_sources '/env-to-ini-mounts/additionals/'

    env2ini::log "=== All configuration sources loaded ===\n"

    # safety to prevent rewrite of secret keys if an app.ini already exists
    if [ -f ${GITEA_APP_INI} ]; then
      env2ini::log 'An app.ini file already exists. To prevent overwriting secret keys, these settings are dropped and remain unchanged:'
      env2ini::log '  - security.INTERNAL_TOKEN'
      env2ini::log '  - security.SECRET_KEY'
      env2ini::log '  - oauth2.JWT_SECRET'

      unset ENV_TO_INI__SECURITY__INTERNAL_TOKEN
      unset ENV_TO_INI__SECURITY__SECRET_KEY
      unset ENV_TO_INI__OAUTH2__JWT_SECRET
    fi

    environment-to-ini -o $GITEA_APP_INI -p ENV_TO_INI