2 files changed, 85 insertions, 0 deletions
diff --git a/contrib/upgrade.sh b/contrib/upgrade.sh
new file mode 100755
index 0000000000..2f4f32bfab
--- /dev/null
+++ b/contrib/upgrade.sh
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# This is an update script for gitea installed via the binary distribution
+# from dl.gitea.io on linux as systemd service. It performs a backup and updates
+# Gitea in place.
+# NOTE: This adds the GPG Signing Key of the Gitea maintainers to the keyring.
+# Depends on: bash, curl, xz, sha256sum, gpg. optionally jq.
+# Usage:      [environment vars] upgrade.sh [version]
+#   See section below for available environment vars.
+#   When no version is specified, updates to the latest release.
+# Examples:
+#   upgrade.sh 1.15.10
+#   giteahome=/opt/gitea giteaconf=$giteahome/app.ini upgrade.sh
+
+# apply variables from environment
+: "${giteabin:="/usr/local/bin/gitea"}"
+: "${giteahome:="/var/lib/gitea"}"
+: "${giteaconf:="/etc/gitea/app.ini"}"
+: "${giteauser:="git"}"
+: "${sudocmd:="sudo"}"
+: "${arch:="linux-amd64"}"
+: "${backupopts:=""}" # see `gitea dump --help` for available options
+
+function giteacmd {
+  "$sudocmd" --user "$giteauser" "$giteabin" --config "$giteaconf" --work-path "$giteahome" "$@"
+}
+
+function require {
+  for exe in "$@"; do
+    command -v "$exe" &>/dev/null || (echo "missing dependency '$exe'"; exit 1)
+  done
+}
+require systemctl curl xz sha256sum gpg "$sudocmd"
+
+# select version to install
+if [[ -z "${1:-}" ]]; then
+  require jq
+  giteaversion=$(curl --connect-timeout 10 -sL https://dl.gitea.io/gitea/version.json | jq -r .latest.version)
+else
+  giteaversion="$1"
+fi
+
+# confirm update
+current=$(giteacmd --version | cut --delimiter=' ' --fields=3)
+[[ "$current" == "$giteaversion" ]] && echo "$current is already installed, stopping." && exit 1
+echo "Make sure to read the changelog first: https://github.com/go-gitea/gitea/blob/main/CHANGELOG.md"
+echo "Are you ready to update Gitea from ${current} to ${giteaversion}? (y/N)"
+read -r confirm
+[[ "$confirm" == "y" ]] || [[ "$confirm" == "Y" ]] || exit 1
+
+pushd "$(pwd)" &>/dev/null
+cd "$giteahome" # needed for gitea dump later
+
+# download new binary
+binname="gitea-${giteaversion}-${arch}"
+binurl="https://dl.gitea.io/gitea/${giteaversion}/${binname}.xz"
+echo "Downloading $binurl..."
+curl --connect-timeout 10 --silent --show-error --fail --location -O "$binurl{,.sha256,.asc}"
+
+# validate checksum & gpg signature (exit script if error)
+sha256sum --check "${binname}.xz.sha256"
+gpg --keyserver keys.openpgp.org --recv 7C9E68152594688862D62AF62D9AE806EC1592E2
+gpg --verify "${binname}.xz.asc" "${binname}.xz" || { echo 'Signature does not match'; exit 1; }
+rm "${binname}".xz.{sha256,asc}
+
+# unpack binary + make executable
+xz --decompress "${binname}.xz"
+chown "$giteauser" "$binname"
+chmod +x "$binname"
+
+# stop gitea, create backup, replace binary, restart gitea
+echo "Stopping gitea at $(date)"
+giteacmd manager flush-queues
+$sudocmd systemctl stop gitea
+echo "Creating backup in $giteahome"
+giteacmd dump $backupopts
+echo "Updating binary at $giteabin"
+mv --force --backup "$binname" "$giteabin"
+$sudocmd systemctl start gitea
+$sudocmd systemctl status gitea
+
+popd
diff --git a/docs/content/doc/upgrade/from-gitea.en-us.md b/docs/content/doc/upgrade/from-gitea.en-us.md
index c3c46a148f..2f64e0fac6 100644
--- a/docs/content/doc/upgrade/from-gitea.en-us.md
+++ b/docs/content/doc/upgrade/from-gitea.en-us.md
@@ -76,6 +76,8 @@ a snapshot for the Gitea data volume and related object storage is more convenie
 * Replace the installed Gitea binary with the downloaded one. 
 * Start the Gitea instance.
 
+A script automating these steps for a deployment on Linux can be found at [`contrib/upgrade.sh` in Gitea's source tree](https://github.com/go-gitea/gitea/blob/main/contrib/upgrade.sh).
+
 ## Take care about customized templates
 
 Gitea's template structure and variables may change between releases, if you are using customized templates,