www/bin/forgejo_latest.sh
2024-07-31 10:41:31 -05:00

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#!/usr/bin/env bash
# shellcheck disable=SC2164,SC2181
#
# Upgrade forgejo binary
# - run this under sudo as it optionally replaces and restarts forgejo
# - "forgejo" is a symlink to the numbered codeberg download binary
# - allows for quick rollback if needed
# - e.g.: 'ln -s forgejo-7.0.5-linux-amd64 forgejo'
#
# Exit codes
# 0 = Success (already newest or upgrade worked)
# 1 = curl failed to download new version
# 2 = sha256sum check failed on download
# 3 = "forgejo" wasn't a symlink
# 4 = upgrade version check failed, forgejo not restarted
# 5 = could not change directory to run sha256sum
# 6 = cannot determine forgejo version info
# 20 = not running under sudo (see FJO_SUDO)
# 21 = forgejo upgraded but not restarted (see FJO_HUP)
# 22 = forgejo upgrade downloaded only (see FJO_LINK)
#
# Requires: curl, awk, grep, sha256sum
# Debug: bash -x /path/to/script.sh
#
# SPDX-License-Identifier: MIT
_VERSION="0.0.1"
# symlink name used to run forgejo (e.g. "forgejo")
FJO_SYM="forgejo"
# where the binary is located (e.g. "/usr/local/bin")
FJO_DIR="/var/xyzzy/bin"
# 0 = verbose status, 1 = silent and rely on exit codes
FJO_QUIET=0
# require running this script under sudo, 0 to disable
FJO_SUDO=1
# restart forgejo using FJO_CMD, 0 to disable
FJO_HUP=0
# replace symlink, 0 to disable (download only, implies FJO_HUP=0)
FJO_LINK=1
# command to restart forgejo (e.g. "systemctl restart forgejo")
FJO_CMD="systemctl restart forgejo"
# codeberg API endpoint to get latest version
FJO_API="https://codeberg.org/api/v1/repos/forgejo/forgejo/releases/latest"
# codeberg download base URL to prepend with version info
FJO_DLB="https://codeberg.org/forgejo/forgejo/releases/download"
# architecture being used, matches download name
FJO_ARCH="linux-amd64"
function noise() {
if [[ ${FJO_QUIET} -eq 0 ]]; then
echo "$*"
fi
}
if [[ ${FJO_SUDO} -eq 1 ]]; then
if [[ $(id -u) -ne 0 ]]; then
noise "Run this script as root (sudo)"
exit 20
fi
fi
# disable curl download progress if in quiet mode
_COPT=""
if [[ ${FJO_QUIET} -eq 1 ]]; then
_COPT+="-s"
fi
noise "Checking forgejo..."
# get installed version
_LOCAL=""
if [[ -L "${FJO_DIR}/${FJO_SYM}" ]]; then
# The version is reported with the gitea base, e.g. "7.0.4+gitea-1.21.11"
# The API / downloads do not include this extra metadata
_LOCAL=$("${FJO_DIR}/${FJO_SYM}" -version | awk '{print $3}')
_LOCAL=${_LOCAL%+*}
else
noise "Forgejo symlink is missing"
exit 3
fi
# get latest version, strip leading "v" (v1.55.1 -> 1.55.1)
## payload example: {"id":2149345,"tag_name":"v7.0.5",...
_REMOTE=$(curl -X 'GET' -H 'accept: application/json' -s "${FJO_API}" \
| grep -Po '"tag_name":"\K.*?(?=")')
_REMOTE=${_REMOTE#v}
# API failed, can't run local binary, etc. - something went wrong
if [[ -z "${_LOCAL}" || -z "${_REMOTE}" ]]; then
noise "Cannot determine forgejo version information"
exit 6
fi
# bash doesn't see versions as numbers, but as strings
if [[ "${_LOCAL}" != "${_REMOTE}" ]]; then
_FJO_NAME="forgejo-${_REMOTE}-${FJO_ARCH}"
noise "Upgrading forgejo - installed ${_LOCAL}, latest ${_REMOTE}"
# curl will handle a failure being able to write to output dir, etc.
# shellcheck disable=SC2086
curl ${_COPT} -f -L --output-dir "${FJO_DIR}" --remote-name-all \
"${FJO_DLB}/v${_REMOTE}/${_FJO_NAME}" \
"${FJO_DLB}/v${_REMOTE}/${_FJO_NAME}.sha256"
if [[ $? -eq 0 ]]; then
# downloads were successful and written to disk
pushd "$(pwd)" >/dev/null
cd "${FJO_DIR}" || (noise "Cannot cd to ${FJO_DIR}"; exit 5)
noise "Checking sha256sum..."
sha256sum --status -c "${_FJO_NAME}.sha256"
if [[ $? -eq 0 ]]; then
# sha256sum check passed
chmod +x "${_FJO_NAME}"
if [[ ${FJO_LINK} -eq 1 ]]; then
# user requested replacing symlink
if [[ -h "${FJO_SYM}" ]]; then
noise "Replacing symlink..."
rm -f "${FJO_SYM}"
ln -s "${_FJO_NAME}" "${FJO_SYM}"
# trust, but verify
_FJO_NEW=$("${FJO_DIR}/${FJO_SYM}" -version | awk '{print $3}')
_FJO_NEW=${_FJO_NEW%+*}
if [[ "${_FJO_NEW}" == "${_REMOTE}" ]]; then
noise "Forgejo binary/symlink upgraded to ${_FJO_NEW}"
if [[ ${FJO_HUP} -eq 1 ]]; then
# user requested restart
noise "Restarting forgejo..."
${FJO_CMD}
else
noise "Forgejo needs restarted"
exit 21
fi
else
noise "Upgrade failed, not restarting forgejo"
exit 4
fi
else
noise "${FJO_SYM} is not a symlink, not overwriting"
exit 3
fi
else
noise "Forgejo ${_FJO_NAME} downloaded, ready to upgrade"
exit 22
fi
else
noise "Download of ${_FJO_NAME} failed sha256sum, not upgrading"
exit 2
fi
popd >/dev/null
else
# curl -f exits with 22 if HTTP response is 400+
noise "Download of ${_FJO_NAME} and sha256 failed, not upgrading"
exit 1
fi
else
noise "Installed forgejo is the latest - ${_LOCAL}"
fi