Added support for arch linux

Added support for arch linux and the pacman package manager used by arch
Please note that mongodb has to be fetched from the Arch User Repository and built due to licensing issues

install.sh

@@ -35,9 +35,19 @@ valid_ip() {
         return $stat
 }
 
-# Checks for supported installer(s) (only apt-get for now :(, might add pacman in the future)
+# Checks for supported installer(s) (only apt-get and pacman right now, might add more in the future)
 if is_command apt-get ; then
-        echo -e "Supported package manager found\n"
+        echo -e "Supported package manager found (apt-get)\n"
+
+        GC_DEPS="mongodb openjdk-17-jre"
+        INSTALLER_DEPS="wget openssl unzip git"
+        SYSTEM="deb" # Debian-based (debian, ubuntu)
+elif is_command pacman ; then
+        echo -e "supported package manager found (pacman)\n"
+
+        GC_DEPS="jre17-openjdk"
+        INSTALLER_DEPS="curl wget openssl unzip git base-devel" # curl is still a dependency here in order to successfully build mongodb
+        SYSTEM="arch" # Arch for the elitists :P
 else
         echo "No supported package manager found"
         exit
@@ -46,21 +56,18 @@ fi
 BRANCH="stable" # Stable by default
 # Allows choice between stable and dev branch
 echo "Please select the branch you wish to install"
-echo -e "!!NOTE!!: stable is the recommended brach.\ndevelopment is not guaranteed to work.\nUnless you have a reason to use development, pick stable"
+echo -e "!!NOTE!!: stable is the recommended branch.\nDo *NOT* use development unless you have a reason to and know what you're doing"
 select branch in "stable" "development" ; do
-	case $branch in
-		stable )
-			BRANCH="stable"
-			break;;
-		development )
-			BRANCH="development"
-			break;;
-	esac
+        case $branch in
+                stable )
+                        BRANCH="stable"
+                        break;;
+                development )
+                        BRANCH="development"
+                        break;;
+        esac
 done
 
-INSTALLER_DEPS="curl wget openssl unzip git"
-GC_DEPS="mongodb openjdk-17-jre"
-
 echo "The following packages will have to be installed in order to INSTALL grasscutter:"
 echo -e "$INSTALLER_DEPS \n"
 echo "The following packages will have to be installed to RUN grasscutter:"
@@ -75,21 +82,95 @@ select yn in "Yes" "No" ; do
 done
 
 echo "Updating package cache..."
-apt-get update -qq > /dev/null
+case $SYSTEM in # More concise than if
+        deb ) apt-get update -qq;;
+        arch ) pacman -Syy;;
+esac
 
 # Starts installing dependencies
 echo "Installing setup dependencies..."
-apt-get -qq install $INSTALLER_DEPS -y > /dev/null
+case $SYSTEM in # These are one-liners anyways
+        deb ) apt-get -qq install $INSTALLER_DEPS -y;;
+        arch ) pacman -Sq --noconfirm --needed $INSTALLER_DEPS > /dev/null;;
+esac
 echo "Done"
 
 echo "Installing grasscutter dependencies..."
-apt-get -qq install $GC_DEPS -y > /dev/null
+case $SYSTEM in
+        deb) apt-get -qq install $GC_DEPS -y > /dev/null;;
+        arch ) pacman -Sq --noconfirm --needed $GC_DEPS > /dev/null;;
+esac
+# *sighs* here we go...
+INST_ARCH_MONGO="no"
+if [ $SYSTEM = "arch" ]; then
+        echo -e "-=-=-=-=-=--- !! IMPORTANT !! ---=-=-=-=-=-\n"
+        echo -e "    Due to licensing issues with mongodb,\n    it is no longer available on the official arch repositiries."
+        echo -e "    In order to install mongodb,\n    it needs to be fetched from the Arch User Repository.\n"
+        echo -e "    As this script is running as root,\n    a temporary user will need to be created to run makepkg."
+        echo -e "    The temporary user will be deleted once\n    makepkg has finished.\n"
+        echo -e "    This will be handled automatically.\n"
+        echo -e "-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-\n"
+        echo -e "!!NOTE!!: Only select \"Skip\" if mongodb is already installed on this system"
+        echo "Do you want to continue?"
+        select yn in "Yes" "Skip" "No" ; do
+                case $yn in
+                        Yes )
+                                INST_ARCH_MONGO="yes"
+                                break;;
+                        No ) exit;;
+                        Skip )
+                                INST_ARCH_MONGO="no"
+                                break;;
+                esac
+        done
+fi
+
+if [ $INST_ARCH_MONGO = "yes" ]; then
+        DIR=$(pwd)
+        # Make temp user
+        echo "Creating temporary user..."
+        TEMPUSER="gctempuser"
+        TEMPHOME="/home/$TEMPUSER"
+        useradd -m $TEMPUSER
+        cd $TEMPHOME
+
+        # Do the actual makepkg shenanigans
+        echo "Building mongodb... (this will take a moment)"
+        su $TEMPUSER<<EOF
+                mkdir temp
+                cd temp
+                git clone https://aur.archlinux.org/mongodb-bin.git -q
+                cd mongodb-bin
+                makepkg -s > /dev/null
+                exit
+EOF
+        mv "$(find -name "mongodb-bin*.pkg.tar.zst" -type f)" ./mongodb-bin.pkg.tar.zst
+        cd $DIR
+
+        # Snatch the file to current working directory
+        mv "$TEMPHOME/mongodb-bin.pkg.tar.zst" ./mongodb-bin.pkg.tar.zst
+        chown root ./mongodb-bin.pkg.tar.zst
+        chgrp root ./mongodb-bin.pkg.tar.zst
+        chmod 775 ./mongodb-bin.pkg.tar.zst
+
+        echo "Installing mongodb..."
+        pacman -U mongodb-bin.pkg.tar.zst --noconfirm > /dev/null
+        rm mongodb-bin.pkg.tar.zst
+
+        echo "Starting mongodb..."
+        systemctl enable mongodb
+        systemctl start mongodb
+
+        echo "Removing temporary account..."
+        userdel -r $TEMPUSER
+fi
 echo "Done"
 
 echo "Getting grasscutter..."
 
 # Download and rename jar
 wget -q --show-progress "https://nightly.link/Grasscutters/Grasscutter/workflows/build/$BRANCH/Grasscutter.zip"
+echo "unzipping"
 unzip -qq Grasscutter.zip
 mv $(find -name "grasscutter*.jar" -type f) grasscutter.jar