Workaround for sed -i with bind mount (#4)

Author: birdhimself

entrypoint.sh

@@ -12,19 +12,26 @@ source ./venv/bin/activate
 
 python3 AstroTuxLauncher.py install
 
+# Use a temporary file to edit launcher.toml because if a bind exists sed -i
+# will fail. See https://unix.stackexchange.com/a/404356.
+TEMPFILE=$(mktemp)
+cp launcher.toml $TEMPFILE
+
 if [[ "$DISABLE_ENCRYPTION" =~ ^([Tt][Rr][Uu][Ee]|1|[Yy][Ee][Ss])$ ]]; then
   echo Encryption will be disabled because DISABLE_ENCRYPTION is set.
-  echo Check https://github.com/birdhimself/astroneer-docker?tab=readme-ov-file#configuring-clients for instructions on how to enable clients to connect to servers with encryption disabled.
-  sed -i 's/^DisableEncryption.*/DisableEncryption = true/' launcher.toml
+  echo Check https://github.com/birdhimself/astroneer-docker?tab=readme-ov-file#configuring-clients-if-encryption-is-disabled on how to enable clients to connect to servers with encryption disabled.
+  sed -i 's/^DisableEncryption.*/DisableEncryption = true/' $TEMPFILE
 else
   echo Encryption will be enabled. You can safely ignore warnings related to encryption not working using Wine, this is no longer the case.
-  sed -i 's/^DisableEncryption.*/DisableEncryption = false/' launcher.toml
+  sed -i 's/^DisableEncryption.*/DisableEncryption = false/' $TEMPFILE
 fi
 
 if [[ "$DEBUG" =~ ^([Tt][Rr][Uu][Ee]|1|[Yy][Ee][Ss])$ ]]; then
-  sed -i 's/^LogDebugMessages.*/LogDebugMessages = true/' launcher.toml
+  sed -i 's/^LogDebugMessages.*/LogDebugMessages = true/' $TEMPFILE
 else
-  sed -i 's/^LogDebugMessages.*/LogDebugMessages = false/' launcher.toml
+  sed -i 's/^LogDebugMessages.*/LogDebugMessages = false/' $TEMPFILE
 fi
 
+cp $TEMPFILE launcher.toml
+
 python3 AstroTuxLauncher.py start