mewdeko-latest-installer

#!/bin/bash
#
# Download and update Mewdeko.
#
# Comment Key:
#   A.1. - Due to permission errors cropping up every now and then, especially when the
#          installer is executed with root privilege then later as a non-root user, it's
#          necessary to make sure that '/tmp/NuGetScratch' and '/home/$USER/.nuget' are
#          owned by the user that the installer is currently being run under.
#
########################################################################################
#### [ Variables ]


export DOTNET_CLI_TELEMETRY_OPTOUT=1  # Used when compiling code.

service_is_active=false
current_creds="Mewdeko/src/Mewdeko/credentials.json"
new_creds="Mewdeko_tmp/Mewdeko/src/Mewdeko/credentials.json"
current_database="Mewdeko/src/Mewdeko/bin/Release/net6.0/data/Mewdeko.db"
new_database="Mewdeko_tmp/Mewdeko/src/Mewdeko/bin/Release/net6.0/data/Mewdeko.db"
current_data="Mewdeko/src/Mewdeko/data"
new_data="Mewdeko_tmp/Mewdeko/src/Mewdeko/data"


#### End of [ Variables ]
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#### [ Main ]


read -rp "We will now download/update Mewdeko. Press [Enter] to begin."

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#### [[ Stop Service ]]


## Stop the service if it's currently running.
if [[ $_SERVICE_STATUS = "active" ]]; then
    service_is_active=true
    _STOP_SERVICE
fi


#### End of [[ Stop Service ]]
########################################################################################
#### [[ Create Backup and Update ]]


## Create a temporary folder to download Mewdeko into.
mkdir Mewdeko_tmp
cd Mewdeko_tmp || _STDERR "Failed to change working directory" "1"

echo "Downloading Mewdeko into 'Mewdeko_tmp'..."
git clone -b "$_BOT_INSTALL_VERSION" --recursive --depth 1 https://github.com/Sylveon76/Mewdeko \
    || _STDERR "Failed to download Mewdeko" "1"

## A.1.
if [[ -d /tmp/NuGetScratch ]]; then
    echo "Modifying ownership of '/tmp/NuGetScratch'..."
    sudo chown -R "$USER":"$USER" /tmp/NuGetScratch \
        || _STDERR "Failed to to modify the ownership of '/tmp/NuGetScratch'" "1"
fi

## A.1.
if [[ -d  /home/$USER/.nuget ]]; then
    echo "Modifying ownership of '/home/$USER/.nuget'..."
    sudo chown -R "$USER":"$USER" /home/"$USER"/.nuget \
        || _STDERR "Failed to to modify the ownership of '/home/$USER/.nuget'..." "1"
fi

echo "Building Mewdeko..."
# shellcheck disable=SC2015
cd Mewdeko/src/Mewdeko \
    && dotnet build -c Release \
    && cd "$_WORKING_DIR" \
    || _STDERR "Failed to build Mewdeko" "1"

## Move credentials, database, and other data to the new version of Mewdeko.
if [[ -d Mewdeko_tmp/Mewdeko && -d Mewdeko ]]; then
    echo "Copying 'credentials.json' to the new version..."
    cp -f "$current_creds" "$new_creds" &>/dev/null
    echo "Copying database to the new version..."
    cp -RT "$current_database" "$new_database" &>/dev/null

    echo "Copying other data to the new version..."

    #### The end-user will have to manually re-add their strings after each update as
    #### updates may cause a number of strings to become obsolete, changed, etc.
    #### However, old user's strings will be backed up as strings_old.

    ## Back up new strings to reverse rewrite.
    rm -rf "$new_data"/strings_new &>/dev/null
    mv -fT "$new_data"/strings "$new_data"/strings_new

    ## Delete old string backups.
    rm -rf "$current_data"/strings_old &>/dev/null
    rm -rf "$current_data"/strings_new &>/dev/null

    # Back up new aliases to reverse rewrite.
    mv -f "$new_data"/aliases.yml "$new_data"/aliases_new.yml

    # Move old data folder contents (and overwrite).
    cp -RT "$current_data" "$new_data"

    # Back up old aliases.
    mv -f "$new_data"/aliases.yml "$new_data"/aliases_old.yml
    # Restore new aliases.
    mv -f "$new_data"/aliases_new.yml "$new_data"/aliases.yml

    # Back up old strings.
    mv -f "$new_data"/strings "$new_data"/strings_old
    # Restore new strings.
    mv -f "$new_data"/strings_new "$new_data"/strings

    rm -rf Mewdeko_old && mv -f Mewdeko Mewdeko_old
fi

mv Mewdeko_tmp/Mewdeko . && rmdir Mewdeko_tmp


#### End of [[ Create Backup and Update ]]
########################################################################################
#### [[ Clean Up and Present Results ]]


echo -e "\n${_GREEN}Finished downloading/updating Mewdeko${_NC}"

if "$service_is_active"; then
    echo "${_CYAN}NOTE: '$_SERVICE_NAME' was stopped to update Mewdeko and" \
        "needs to be started using one of the run modes in the installer menu${_NC}"
fi

read -rp "Press [Enter] to apply any existing changes to the installers"


#### End of [[ Clean Up and Present Results ]]
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#### End of [ Main ]
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