✨ Add user-fix script

Makes sure that IF the user decided decided to change the username,
contrary to setup guide instructions, stuff will still work because
the user name change also gets applied to anything OctoPi specific.

.github/workflows/custopize.yml

@@ -159,6 +159,7 @@ jobs:
           * OctoPi ${{ env.OCTOPI_VERSION }}
           * OctoPrint ${{ env.OCTOPRINT_VERSION }}
           * Latest kernel & bootloader
+          * Service to complete username changes on first-boot as needed
 
         Created with [CustoPiZer](https://github.com/OctoPrint/CustoPiZer)
 

scripts/90-install-user-fix

@@ -0,0 +1,17 @@
+set -x
+set -e
+
+export LC_ALL=C
+
+source /common.sh
+install_cleanup_trap
+
+# we need to install virtualenv-tools3, so let's get pip and that
+apt install -y python3-pip
+sudo -u pi pip3 install --user virtualenv-tools3
+
+cp /files/user-fix /root/bin/user-fix
+chmod +x /root/bin/user-fix
+
+cp /files/user-fix.service /etc/systemd/system/user-fix.service
+systemctl enable user-fix.service

scripts/files/user-fix

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+set -e
+
+USERID=1000
+FIRSTUSER=`getent passwd $USERID | cut -d: -f1`
+FIRSTUSERHOME=`getent passwd $USERID | cut -d: -f6`
+
+CURRENT=`grep User= /etc/systemd/system/octoprint.service | cut -d= -f2`
+
+if [ "$CURRENT" = "pi" -a "$FIRSTUSER" != "pi" ]; then
+    # if we get here it means that the first user was renamed but we haven't yet
+    # updated all of OctoPi's files that depend on that name, so let's do that now
+
+    # first we need to figure out if we can use the new user name in systemd files
+    # directly or if we need to use the UID - we do that by checking if the
+    # escaped name differes from the plain name, if so something is non ASCII
+    # and the UID is the safer bet
+    FIRSTUSERESC=`systemd-escape "$FIRSTUSER"`
+    if [ "$FIRSTUSER" != "$FIRSTUSERESC" ]; then
+        SERVICEUSER=$USERID
+    else
+        SERVICEUSER=$FIRSTUSER
+    fi
+
+    # fix OctoPrint service file
+    echo "Fixing service file"
+    sed -i "s!User=pi!User=$SERVICEUSER!g" /etc/systemd/system/octoprint.service
+    sed -i "s!ExecStart=/home/pi/!ExecStart=$FIRSTUSERHOME/!g" /etc/systemd/system/octoprint.service
+    systemctl daemon-reload
+
+    # fix sudoers files
+    echo "Fixing sudoers"
+    sed -i "s!^pi!$FIRSTUSER!g" /etc/sudoers.d/octoprint-service
+    sed -i "s!^pi!$FIRSTUSER!g" /etc/sudoers.d/octoprint-shutdown
+
+    # fix scripts
+    echo "Fixing scripts"
+    sed -i "s!/home/pi/!$FIRSTUSERHOME/!g" $FIRSTUSERHOME/scripts/add-octoprint-checkout
+    sed -i "s!/home/pi/!$FIRSTUSERHOME/!g" $FIRSTUSERHOME/scripts/welcome
+    sed -i "s!/home/pi/!$FIRSTUSERHOME/!g" $FIRSTUSERHOME/.bashrc
+    sed -i "s!/home/pi/!$FIRSTUSERHOME/!g" /root/bin/webcamd
+
+    # fix virtualenv
+    echo "Fixing paths in virtual environment"
+    cd $FIRSTUSERHOME/oprint
+    sudo -u $FIRSTUSER $FIRSTUSERHOME/.local/bin/virtualenv-tools --update-path $FIRSTUSERHOME/oprint
+
+    # finally, reboot for all of this to actually take affect
+    echo "Adjusted scripts to new user, restarting services..."
+    systemctl reboot
+fi

scripts/files/user-fix.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Ensure that user name changes are applied as needed
+
+DefaultDependencies=no
+
+Before=network-pre.target
+Wants=network-pre.target
+
+After=local-fs.target
+Wants=local-fs.target
+
+[Service]
+Type=oneshot
+ExecStart=/root/bin/user-fix
+
+[Install]
+WantedBy=multi-user.target