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+#!/bin/bash
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+
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+set -e -o errexit -o nounset -o pipefail
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+
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+#
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+# Colors
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+#
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+
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+declare -r RED="\e[31m"
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+declare -r GREEN="\e[32m"
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+declare -r BLUE="\e[34m"
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+declare -r NO_COLOR="\e[0m"
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+
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+#
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+# Helper functions
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+#
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+
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+function highlight() {
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+ local reset="${2:-$NO_COLOR}"
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+ echo "${BLUE}$1${reset}"
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+}
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+
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+function action_start() {
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+ echo -en "⚙️ $1: "
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+}
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+
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+function action_ok() {
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+ echo -e "\n\t✅ ${GREEN}${*}${NO_COLOR}\n"
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+}
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+
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+function action_error() {
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+ echo -e "\n\t❌ ${RED}${*}${NO_COLOR}" >&2
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+}
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+
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+function action_error_exit() {
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+ action_error "${*}\n\n${RED}Aborting!${NO_COLOR}"
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+
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+ exit 1
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+}
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+
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+#
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+# Configuration
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+#
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+
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+declare -r min_docker_compose_version_arr=(2 17)
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+min_docker_compose_version=$(
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+ IFS=.
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+ echo "${min_docker_compose_version[*]}"
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+)
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+
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+#
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+# Help text
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+#
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+
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+DOCKER_HELP="
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+
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+\tWe recommend installing Docker (and Compose) directly from Docker.com instead of your Operation System package registry.
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+\tPlease see $(highlight "https://docs.docker.com/engine/install/")${RED} for information on how to install Docker on your system.
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+
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+\tA convinience script is provided by Docker to automate the installation that should work on all supported platforms:
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+
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+\t\t ${GREEN}\$${BLUE} curl -fsSL https://get.docker.com -o get-docker.sh
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+\t\t ${GREEN}\$${BLUE} sudo sh ./get-docker.sh
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+${RED}
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+\tPlease see $(highlight "https://docs.docker.com/engine/install/ubuntu/#install-using-the-convenience-script")${RED} for more information
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+
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+\tAlternatively, you can update *JUST* the Compose plugin by following the guide here:
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+\t$(highlight "https://docs.docker.com/compose/install/linux/#install-the-plugin-manually")${RED}
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+
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+\tLearn more about Docker compose release history here:
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+\t$(highlight "https://docs.docker.com/compose/release-notes/")${RED}${NO_COLOR}"
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+declare -r DOCKER_HELP
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+
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+#
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+# System checks
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+#
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+
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+echo -e "👋 ${GREEN}Hello!"
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+echo -e ""
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+echo -e "This script will check your system for the minimum requirements outlined in the Pixelfed Docker install guide"
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+echo -e "You can find the guide here ${BLUE}https://jippi.github.io/pixelfed-docs-next/pr-preview/pr-1/running-pixelfed/docker/prerequisites.html#software${GREEN}."
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+echo -e "${NO_COLOR}"
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+
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+# git installed?
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+action_start "Checking if [$(highlight "git")] command is available"
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+command -v git >/dev/null 2>&1 || {
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+ action_error_exit "Pixelfed require the 'git' command, but it's not installed"
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+}
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+action_ok "git is installed"
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+
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+# docker installed?
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+action_start "Checking if [$(highlight "docker")] command is available"
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+command -v docker >/dev/null 2>&1 || {
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+ action_error_exit "Pixelfed require the 'docker' command, but it's not installed. ${DOCKER_HELP}"
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+}
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+action_ok "docker is installed"
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+
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+# docker compose installed?
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+action_start "Checking if [$(highlight "docker compose")] command is available"
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+docker compose >/dev/null 2>&1 || {
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+ action_error_exit "Pixelfed require the 'docker compose' command, but it's not installed. ${DOCKER_HELP}"
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+}
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+action_ok "docker compose is installed"
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+
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+# docker compose version is acceptable?
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+compose_version=$(docker compose version --short)
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+
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+declare -a compose_version_arr
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+IFS="." read -r -a compose_version_arr <<<"$compose_version"
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+
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+## major version
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+action_start "Checking if [$(highlight "docker compose version")] major version (${min_docker_compose_version_arr[0]}) is acceptable"
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+[[ ${compose_version_arr[0]} -eq ${min_docker_compose_version_arr[0]} ]] || {
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+ action_error_exit "Pixelfed require minimum Docker Compose major version ${min_docker_compose_version_arr[0]}.x.x - found ${compose_version}.${DOCKER_HELP}"
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+}
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+action_ok "You're using major version ${compose_version_arr[0]}"
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+
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+## minor version
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+action_start "Checking if [$(highlight "docker compose version")] minor version (${min_docker_compose_version_arr[1]}) is acceptable"
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+[[ ${compose_version_arr[1]} -ge ${min_docker_compose_version_arr[1]} ]] || {
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+ action_error_exit "Pixelfed require minimum Docker Compose minor version ${min_docker_compose_version_arr[0]}.${min_docker_compose_version_arr[1]} - found ${compose_version}.${DOCKER_HELP}"
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+}
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+action_ok "You're using minor version ${compose_version_arr[1]}"
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+
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+# Yay, everything is fine
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+echo -e "🎉 ${GREEN}All checks passed, you should be ready to run Pixelfed on this server!${NO_COLOR}"
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daniel