Remove hard coded values from SystemD Unit and installation (#1874)

Removes hardcoded values form our supplied SystemD Unit file and the installation script. Users, prior to installation, will need to ensure that their user, group, and permissions settings of where Athens stores data are correct.

Co-authored-by: Manu Gupta <manugupt1@gmail.com>
Co-authored-by: Matt <matt.ouille@protonmail.com>

scripts/service/athens.service

@@ -14,8 +14,6 @@ Nice=5
 User=www-data
 Group=www-data
 
-Environment=ATHENS_DISK_STORAGE_ROOT=/var/run/athens
-
 ; The full path and the arguments of the command to be executed to start the process.
 ExecStart=/usr/local/bin/athens -config_file=/etc/athens/config.toml
 

scripts/systemd.sh

@@ -41,12 +41,6 @@ function doInstallConfig
   fi
   sudo mkdir -p /etc/athens
   sudo install -v -o root -g root -m 644 config.toml /etc/athens
-
-  # if storage is on disk, this is where the database goes (see scripts/service/athens.service)
-  ATHENS_DISK_STORAGE_ROOT=/var/run/athens
-  sudo mkdir -p $ATHENS_DISK_STORAGE_ROOT
-  sudo chown www-data $ATHENS_DISK_STORAGE_ROOT
-  sudo chgrp www-data $ATHENS_DISK_STORAGE_ROOT
 }
 
 # doInstallBinary copies the Athens binary to /usr/local/bin with the necessary settings.
@@ -69,6 +63,9 @@ function doInstallBinary
 # doInstallSystemd sets up the SystemD service unit.
 function doInstallSystemd
 {
+  local rootPath=$(sed -nr 's/(RootPath) = (".*")/\2/p' /etc/athens/config.toml | xargs)
+  sed -i "/ReadWritePaths/ s|=.*|=$rootPath|" scripts/service/athens.service
+
   sudo install -v -o root -g root -m 644 scripts/service/athens.service /etc/systemd/system
   sudo systemctl daemon-reload
   sudo systemctl enable athens