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#!/bin/sh
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set -eu
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###############################################################################
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# Entrypoint script for Nextcloud Docker container
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###############################################################################
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# Handles container-specific operations such as initialization, automatic configuration,
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# user/group ID management, and setup checks. Also runs Nextcloud Server’s built-in
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# installation and upgrade routines in a way that fits the container environment.
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#
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# Supports environment-based configuration injection at install time for all key
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# parameters (see README for details). After installation, allows reconfiguration
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# of select parameters via environment variables - except NEXTCLOUD_TRUSTED_DOMAINS
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# and those set by the Nextcloud installer.
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#
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# REMINDER: This script must work with non-interactive, POSIX-compliant shells used in our
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# images. Do not use Bash-specific syntax ("bashisms"): /bin/sh is always either 'ash'
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# (BusyBox) or 'dash' (Debian), not Bash. Stick to standard POSIX shell features.
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# Resources for writing portable shell scripts:
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# - checkbashisms (Alpine: checkbashisms; Debian: devscripts)
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# - https://mywiki.wooledge.org/Bashism
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# - https://www.shellcheck.net/
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# Same also applies to any commands called too (e.g., GNU find versus Busybox find).
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###############################################################################
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# Utility Functions
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###############################################################################
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# Command for running `occ`
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OCC="php /var/www/html/occ"
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# version_greater
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# Compare two version strings (A and B).
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# Arguments:
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# $1: Version string A
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# $2: Version string B
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# Returns: 0 (true) if version A is greater than B; 1 (false) otherwise.
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version_greater() {
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[ "$(printf '%s\n' "$@" | sort -t '.' -n -k1,1 -k2,2 -k3,3 -k4,4 | head -n 1)" != "$1" ]
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}
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# directory_empty
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# Check if a directory is empty.
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# Arguments:
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# $1: Directory path.
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# Returns: 0 (true) if directory is empty; 1 (false) otherwise.
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directory_empty() {
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[ -z "$(ls -A "$1/")" ]
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}
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# run_as
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# Run a command as the specified user if running as root, otherwise as current user.
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# Arguments:
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# $1: Command string to execute.
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# Globals:
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# user - Username to switch to (when running as root).
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# Returns: the exit code of the executed command.
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# TODO:
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# Consider printing error message then returning (or exiting the script) if a command fails.
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# If some callers want to handle errors, hide behind optional flag ("--exit-on-error").
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run_as() {
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if [ "$(id -u)" = 0 ]; then
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su -p "$user" -s /bin/sh -c "$1"
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else
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sh -c "$1"
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fi
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}
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# run_path
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# Execute all executable .sh files in the specified hook folder, in alphanumeric order.
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# Arguments:
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# $1: Name of the hook folder inside /docker-entrypoint-hooks.d/
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# Returns: 0 on success; exits the script on any hook failure.
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run_path() {
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hook_folder_path="/docker-entrypoint-hooks.d/$1"
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return_code=0
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found=0
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echo "=> Searching for hook scripts (*.sh) to run in \"${hook_folder_path}\""
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if ! [ -d "${hook_folder_path}" ] || directory_empty "${hook_folder_path}"; then
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echo "==> Skipped: the \"$1\" folder is empty (or does not exist)"
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return 0
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fi
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find "${hook_folder_path}" -maxdepth 1 -iname '*.sh' '(' -type f -o -type l ')' -print | sort | (
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while read -r script_file_path; do
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if ! [ -x "${script_file_path}" ]; then
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echo "==> The script \"${script_file_path}\" was skipped: lacks exec flag"
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found=$((found-1))
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continue
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fi
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echo "==> Running script (cwd: $(pwd)): \"${script_file_path}\""
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found=$((found+1))
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run_as "${script_file_path}" || return_code="$?"
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if [ "${return_code}" -ne "0" ]; then
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echo "==> Failed executing \"${script_file_path}\". Exit code: ${return_code}"
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exit 1
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fi
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echo "==> Finished executing: \"${script_file_path}\""
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done
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if [ "$found" -lt "1" ]; then
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echo "==> Skipped: the \"$1\" folder contains no valid scripts"
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else
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echo "=> Completed executing scripts in \"$1\""
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fi
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)
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}
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# file_env
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# Load an environment variable from a file if available (supporting Docker secrets).
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# Arguments:
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# $1: Name of the environment variable.
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# $2: (Optional) Default value if not set.
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# Returns: Sets the environment variable named by $1.
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file_env() {
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var="$1"
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fileVar="${var}_FILE"
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def="${2:-}"
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varValue=$(env | grep -E "^${var}=" | sed -E -e "s/^${var}=//")
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fileVarValue=$(env | grep -E "^${fileVar}=" | sed -E -e "s/^${fileVar}=//")
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if [ -n "${varValue}" ] && [ -n "${fileVarValue}" ]; then
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echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
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exit 1
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fi
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if [ -n "${varValue}" ]; then
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export "$var"="${varValue}"
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elif [ -n "${fileVarValue}" ]; then
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export "$var"="$(cat "${fileVarValue}")"
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elif [ -n "${def}" ]; then
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export "$var"="$def"
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fi
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unset "$fileVar"
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}
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###############################################################################
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# rsync_wrapper
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# Helper to invoke rsync with the appropriate options depending on user/group.
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# Arguments:
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# $@ - Additional rsync arguments and paths.
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# Globals:
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# user - Username to use for chown (when running as root).
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# Returns: the exit code of the rsync command.
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#
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# Handles:
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# - SC2086 and word-splitting safely
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# - DRY invocation of rsync for all sync operations
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###############################################################################
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rsync_wrapper() {
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if [ "$(id -u)" = 0 ]; then
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set -- -rlDog --chown "$user:$group" "$@"
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else
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set -- -rlD "$@"
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fi
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rsync "$@"
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}
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###############################################################################
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# Main Entrypoint Logic
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###############################################################################
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# Disable the Apache remoteip configuration if requested via environment variable.
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# TODO: This probably be moved inside the main initialization/upgrade block below.
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if expr "$1" : "apache" 1>/dev/null; then
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if [ -n "${APACHE_DISABLE_REWRITE_IP+x}" ]; then
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a2disconf remoteip
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fi
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fi
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# Only run this block if entrypoint command is Apache|PHP-FPM, or if explicitly requested.
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# TODO: This huge block should probably be broken into several discrete functions for maintainability.
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if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
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uid="$(id -u)"
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gid="$(id -g)"
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# Determine effective user and group for Nextcloud operations.
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if [ "$uid" = '0' ]; then
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case "$1" in
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apache2*)
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user="${APACHE_RUN_USER:-www-data}"
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group="${APACHE_RUN_GROUP:-www-data}"
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# Strip off any '#' symbol ('#1000' is valid syntax for Apache)
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user="${user#'#'}"
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group="${group#'#'}"
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;;
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*) # php-fpm
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user='www-data'
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group='www-data'
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;;
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esac
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else
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user="$uid"
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group="$gid"
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fi
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# If REDIS_HOST is set, configure PHP sessions to use Redis.
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if [ -n "${REDIS_HOST+x}" ]; then
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echo "Configuring Redis as session handler"
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file_env REDIS_HOST_PASSWORD
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# Determine session.save_path depending on socket or TCP and credentials.
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redis_save_path=""
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first_char=$(printf '%s' "$REDIS_HOST" | cut -c1-1)
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if [ "$first_char" = "/" ]; then
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# Unix socket
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if [ -n "${REDIS_HOST_PASSWORD+x}" ]; then
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if [ -n "${REDIS_HOST_USER+x}" ]; then
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redis_save_path="unix://${REDIS_HOST}?auth[]=${REDIS_HOST_USER}&auth[]=${REDIS_HOST_PASSWORD}"
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else
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redis_save_path="unix://${REDIS_HOST}?auth=${REDIS_HOST_PASSWORD}"
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fi
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else
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redis_save_path="unix://${REDIS_HOST}"
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fi
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elif [ -n "${REDIS_HOST_PASSWORD+x}" ]; then
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# TCP with password
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if [ -n "${REDIS_HOST_USER+x}" ]; then
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redis_save_path="tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}?auth[]=${REDIS_HOST_USER}&auth[]=${REDIS_HOST_PASSWORD}"
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else
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redis_save_path="tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}?auth=${REDIS_HOST_PASSWORD}"
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fi
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else
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# TCP without password
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redis_save_path="tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}"
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fi
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# Write the configuration file using a heredoc.
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cat > /usr/local/etc/php/conf.d/redis-session.ini <<EOF
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session.save_handler = redis
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session.save_path = "${redis_save_path}"
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redis.session.locking_enabled = 1
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redis.session.lock_retries = -1
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# redis.session.lock_wait_time is specified in microseconds.
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# Wait 10ms before retrying the lock rather than the default 2ms.
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redis.session.lock_wait_time = 10000
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EOF
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fi
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# Use file locking to ensure only one initialization or upgrade runs at a time.
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(
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if ! flock -n 9; then
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echo "Another process is initializing Nextcloud. Waiting..."
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flock 9
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fi
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installed_version="0.0.0.0"
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if [ -f /var/www/html/version.php ]; then
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# TODO: The error handling should be improved here in case of syntax/etc errors
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# shellcheck disable=SC2016
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installed_version="$(php -r 'require "/var/www/html/version.php"; echo implode(".", $OC_Version);')"
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fi
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# TODO: The error handling should be improved here in case of syntax/etc errors
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# shellcheck disable=SC2016
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image_version="$(php -r 'require "/usr/src/nextcloud/version.php"; echo implode(".", $OC_Version);')"
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if version_greater "$installed_version" "$image_version"; then
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echo "Can't start Nextcloud: data version ($installed_version) is higher than"
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echo "docker image version ($image_version); downgrading is not supported."
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echo "Are you sure you have pulled a newer image version?"
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exit 1
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fi
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# Image version needs to be > installed version to proceed farther.
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# NOTE: Also true if there is no installed version.
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if version_greater "$image_version" "$installed_version"; then
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echo "Initializing nextcloud $image_version ..."
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# Check for an already installed version that isn't in allowable upgrade jump range.
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if [ "$installed_version" != "0.0.0.0" ]; then
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if [ "${image_version%%.*}" -gt "$((${installed_version%%.*} + 1))" ]; then
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echo "Can't start Nextcloud: upgrading from $installed_version to"
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echo "$image_version is not supported."
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echo "You can upgrade only one major version at a time."
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echo "E.g., to upgrade from 14 to 16, first upgrade 14 to 15, then 15 to 16."
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exit 1
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fi
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# Installed version has been deemed within allow upgrade jump range...
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echo "Upgrading nextcloud from $installed_version ..."
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run_as "$OCC app:list" | sed -n "/Enabled:/,/Disabled:/p" > /tmp/list_before
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fi
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# Deploy image code onto the persistent storage volume.
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##########################################################################################
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# Why we copy Nextcloud code from the image to persistent storage
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#
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# Nextcloud's application directory needs to be on persistent storage, not just inside
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# the container's writable/read-only layers. This ensures:
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# - All code and changes survive container restarts and replacements.
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# - Clustering (using multiple containers with shared data) functions as expected.
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# - Nextcloud can safely modify, add, or remove files (mainly under config/, data/, apps/,
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# custom_apps/) during normal operation.
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# - Upgrades, apps, and troubleshooting work reliably.
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#
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# The container’s writable layer is temporary and unique to each container. Changes made there
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# are lost if the container is removed and are not shared between containers.
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#
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# This approach follows Nextcloud's official installation conventions and is necessary for
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# robust container deployments.
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#
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# Note:
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# - Actual file changes are typically limited to config/, data/, apps/, and custom_apps/
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# in a standard setup (so there may be some room for improvement here).
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#
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# TODO:
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# - Consider ways to further streamline this process upstream.
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# - Investigate separating truly read-only folders from writable ones.
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##########################################################################################
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# Replace installed code with newer image code except for exclusions.
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#
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# Risks & Considerations:
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# - Deleting files not listed in the exclusions file could remove legitimate Nextcloud data
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# if users overlook documentation or misconfigure persistent storage.
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# - Using rsync (cp would be similar) are slow on NFS and other network filesystems,
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# sometimes merely annoyingly; sometimes unacceptably.
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#
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# Alternative Approaches:
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# - Warn if we detect unexpected files that would be deleted, but avoid a hard error to
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# allow legitimate Nextcloud files/folders.
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# - A dry-run mode with a hard error would prevent mistakes, but also block valid upgrades.
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# - Batching files with tar on both ends of a pipe might help with performance.
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#
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# TODO:
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# - Print a warning if non-excluded files are detected for deletion.
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# - Investigate a middle ground between safety (preventing accidental deletion)
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# and usability (supporting easy upgrades).
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# - Consider batching file transfers for better performance on network filesystems.
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#
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# Notes:
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# - The current rsync approach works for local filesystems but may be slow or appear
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# to hang on networked storage.
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rsync_wrapper \
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--delete \
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--exclude-from=/upgrade.exclude \
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/usr/src/nextcloud/ \
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/var/www/html/
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# Copy newer image code for the following directories ONLY if they do not exist or are empty:
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# - config/
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# - data/
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# - custom_apps/
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# - themes/
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#
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# TODO:
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# - Consider updating only 'themes/' here, and move handling of 'config/', 'data/', and
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# 'custom_apps/' into the install block. These directories should not be modified during a
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# regular update/upgrade.
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# - Review whether this change would cause any unexpected behavior or introduce breaking
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# changes.
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for dir in config data custom_apps themes; do
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if [ ! -d "/var/www/html/$dir" ] || directory_empty "/var/www/html/$dir"; then
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rsync_wrapper \
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--include "/$dir/" \
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--exclude '/*' \
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/usr/src/nextcloud/ \
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/var/www/html/
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fi
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done
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# Replace installed code's version.php with newer image code version
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rsync_wrapper \
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--include '/version.php' \
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--exclude '/*' \
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/usr/src/nextcloud/ \
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/var/www/html/
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# Install block for fresh instances.
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# TODO: Consider moving install block to a dedicated function
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if [ "$installed_version" = "0.0.0.0" ]; then
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echo "New nextcloud instance"
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# Handle initial admin credentials (if provided)
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file_env NEXTCLOUD_ADMIN_PASSWORD
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file_env NEXTCLOUD_ADMIN_USER
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install=false
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if [ -n "${NEXTCLOUD_ADMIN_USER+x}" ] \
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&& [ -n "${NEXTCLOUD_ADMIN_PASSWORD+x}" ]; then
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install_options="-n \
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--admin-user \"$NEXTCLOUD_ADMIN_USER\" \
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--admin-pass \"$NEXTCLOUD_ADMIN_PASSWORD\""
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if [ -n "${NEXTCLOUD_DATA_DIR+x}" ]; then
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install_options="$install_options \
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|
--data-dir \"$NEXTCLOUD_DATA_DIR\""
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fi
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|
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# Handle database configuration (if specified)
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|
|
file_env MYSQL_DATABASE
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|
|
file_env MYSQL_PASSWORD
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file_env MYSQL_USER
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file_env POSTGRES_DB
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|
|
file_env POSTGRES_PASSWORD
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|
file_env POSTGRES_USER
|
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|
|
if [ -n "${SQLITE_DATABASE+x}" ]; then
|
|
|
echo "Installing with SQLite database"
|
|
|
install_options="$install_options \
|
|
|
--database-name \"$SQLITE_DATABASE\""
|
|
|
install=true
|
|
|
elif [ -n "${MYSQL_DATABASE+x}" ] \
|
|
|
&& [ -n "${MYSQL_USER+x}" ] \
|
|
|
&& [ -n "${MYSQL_PASSWORD+x}" ] \
|
|
|
&& [ -n "${MYSQL_HOST+x}" ]; then
|
|
|
echo "Installing with MySQL database"
|
|
|
install_options="$install_options \
|
|
|
--database mysql \
|
|
|
--database-name \"$MYSQL_DATABASE\" \
|
|
|
--database-user \"$MYSQL_USER\" \
|
|
|
--database-pass \"$MYSQL_PASSWORD\" \
|
|
|
--database-host \"$MYSQL_HOST\""
|
|
|
install=true
|
|
|
elif [ -n "${POSTGRES_DB+x}" ] \
|
|
|
&& [ -n "${POSTGRES_USER+x}" ] \
|
|
|
&& [ -n "${POSTGRES_PASSWORD+x}" ] \
|
|
|
&& [ -n "${POSTGRES_HOST+x}" ]; then
|
|
|
echo "Installing with PostgreSQL database"
|
|
|
install_options="$install_options \
|
|
|
--database pgsql \
|
|
|
--database-name \"$POSTGRES_DB\" \
|
|
|
--database-user \"$POSTGRES_USER\" \
|
|
|
--database-pass \"$POSTGRES_PASSWORD\" \
|
|
|
--database-host \"$POSTGRES_HOST\""
|
|
|
install=true
|
|
|
fi
|
|
|
|
|
|
# Run Nextcloud installer if we were provided enough auto-config values.
|
|
|
# (if not, we don't trigger the actual Nextcloud installer; the config values
|
|
|
# will need to be provided via the Nextcloud Installer's Web UI / wizard).
|
|
|
if [ "$install" = true ]; then
|
|
|
# Trigger pre-installation hook scripts (if any)
|
|
|
run_path pre-installation
|
|
|
|
|
|
echo "Starting nextcloud installation"
|
|
|
max_retries=10
|
|
|
try=0
|
|
|
until [ "$try" -gt "$max_retries" ] || run_as \
|
|
|
"$OCC maintenance:install $install_options"
|
|
|
do
|
|
|
echo "Retrying install..."
|
|
|
try=$((try+1))
|
|
|
sleep 10s
|
|
|
done
|
|
|
if [ "$try" -gt "$max_retries" ]; then
|
|
|
echo "Installation of nextcloud failed!"
|
|
|
exit 1
|
|
|
fi
|
|
|
|
|
|
# Configure trusted domains if provided.
|
|
|
# TODO: This could probably be moved elsewhere to permit reconfiguration within existing installs.
|
|
|
if [ -n "${NEXTCLOUD_TRUSTED_DOMAINS+x}" ]; then
|
|
|
echo "Setting trusted_domains…"
|
|
|
set -f # turn off glob
|
|
|
NC_TRUSTED_DOMAIN_IDX=1
|
|
|
for DOMAIN in ${NEXTCLOUD_TRUSTED_DOMAINS}; do
|
|
|
DOMAIN=$(echo "${DOMAIN}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
|
|
|
run_as \
|
|
|
"$OCC config:system:set trusted_domains $NC_TRUSTED_DOMAIN_IDX --value=\"${DOMAIN}\""
|
|
|
NC_TRUSTED_DOMAIN_IDX=$((NC_TRUSTED_DOMAIN_IDX+1))
|
|
|
done
|
|
|
set +f # turn glob back on
|
|
|
fi
|
|
|
|
|
|
# Trigger post-installation hook scripts (if any)
|
|
|
run_path post-installation
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Not enough parameters specified to do a fully automated installation.
|
|
|
if [ "$install" = false ]; then
|
|
|
echo "Next step: Access your instance to finish the web-based installation!"
|
|
|
echo "Hint: Set NEXTCLOUD_ADMIN_USER, NEXTCLOUD_ADMIN_PASSWORD, and DB vars"
|
|
|
echo "before first launch to fully automate initial installation."
|
|
|
fi
|
|
|
|
|
|
# Upgrade path for existing instances.
|
|
|
# TODO: Consider moving upgrade block to a dedicated function
|
|
|
else
|
|
|
# Trigger pre-upgrade hook scripts (if any)
|
|
|
run_path pre-upgrade
|
|
|
|
|
|
run_as "$OCC upgrade"
|
|
|
|
|
|
run_as "$OCC app:list" | sed -n "/Enabled:/,/Disabled:/p" > /tmp/list_after
|
|
|
echo "The following apps have been disabled:"
|
|
|
diff /tmp/list_before /tmp/list_after \
|
|
|
| grep '<' | cut -d- -f2 | cut -d: -f1
|
|
|
rm -f /tmp/list_before /tmp/list_after
|
|
|
|
|
|
# Trigger post-upgrade hook scripts (if any)
|
|
|
run_path post-upgrade
|
|
|
fi
|
|
|
|
|
|
echo "Initializing finished"
|
|
|
fi
|
|
|
|
|
|
# Update htaccess after init if requested
|
|
|
if [ -n "${NEXTCLOUD_INIT_HTACCESS+x}" ] \
|
|
|
&& [ "$installed_version" != "0.0.0.0" ]; then
|
|
|
run_as "$OCC maintenance:update:htaccess"
|
|
|
fi
|
|
|
) 9> /var/www/html/nextcloud-init-sync.lock
|
|
|
|
|
|
# Warn the user if any config files in persistent storage differ from the image defaults.
|
|
|
for cfgPath in /usr/src/nextcloud/config/*.php; do
|
|
|
cfgFile=$(basename "$cfgPath")
|
|
|
|
|
|
if [ "$cfgFile" != "config.sample.php" ] \
|
|
|
&& [ "$cfgFile" != "autoconfig.php" ]; then
|
|
|
if ! cmp -s "/usr/src/nextcloud/config/$cfgFile" "/var/www/html/config/$cfgFile"; then
|
|
|
echo "Warning: /var/www/html/config/$cfgFile differs from the image default at"
|
|
|
echo " /usr/src/nextcloud/config/$cfgFile"
|
|
|
fi
|
|
|
fi
|
|
|
done
|
|
|
|
|
|
# Trigger before-starting hook scripts (if any)
|
|
|
run_path before-starting
|
|
|
fi
|
|
|
|
|
|
###############################################################################
|
|
|
# Handoff to Main Container Process
|
|
|
###############################################################################
|
|
|
|
|
|
# Hand off to the main container process (e.g., Apache, php-fpm, etc.)
|
|
|
exec "$@"
|
