Gitea automatic bash update script

gitea_update.sh

#!/bin/bash

# Function to get version number from semantic version string
version_to_number() {
    echo "$1" | awk -F. '{ printf("%d%03d%03d", $1,$2,$3); }'
}

# Get the latest release version from GitHub
latest_version=$(curl -s https://api.github.com/repos/go-gitea/gitea/releases/latest | grep 'tag_name' | cut -d '"' -f 4)

# Remove the 'v' prefix from version string
latest_version="${latest_version#v}"

# Get the currently installed Gitea version
current_version=$(/usr/local/bin/gitea --version 2>&1)
current_version=$(echo "$current_version" | grep -oP '(\d+\.\d+\.\d+)')

echo "Latest version: $latest_version"
echo "Installed version: $current_version"

# Compare versions
if [ $(version_to_number $latest_version) -gt $(version_to_number $current_version) ]; then
    echo "A newer version of Gitea is available."

    # Define download URL
    download_url="https://github.com/go-gitea/gitea/releases/download/v${latest_version}/gitea-${latest_version}-linux-amd64"

    # Download and replace the current binary
    echo "Downloading Gitea version $latest_version..."
    curl -L $download_url -o /tmp/gitea-latest
    echo "Replacing old version..."
    sudo mv /tmp/gitea-latest /usr/local/bin/gitea
    sudo chmod +x /usr/local/bin/gitea
    echo "Starting Gitea again"
    systemctl restart gitea

    echo "Gitea updated successfully to version $latest_version"
else
    echo "Gitea is already up to date."
fi