Add swarm key variables to container daemon

License: MIT
Signed-off-by: Caian Benedicto <caianbene@gmail.com>

bin/container_daemon

@@ -24,6 +24,33 @@ else
   ipfs init $INIT_ARGS
   ipfs config Addresses.API /ip4/0.0.0.0/tcp/5001
   ipfs config Addresses.Gateway /ip4/0.0.0.0/tcp/8080
+
+  # Set up the swarm key, if provided
+
+  SWARM_KEY_FILE="$repo/swarm.key"
+  SWARM_KEY_PERM=0400
+
+  # Create a swarm key from a given environment variable
+  if [ ! -z "$IPFS_SWARM_KEY" ] ; then
+    echo "Copying swarm key from variable..."
+    echo -e "$IPFS_SWARM_KEY" >"$SWARM_KEY_FILE" || exit 1
+    chmod $SWARM_KEY_PERM "$SWARM_KEY_FILE"
+  fi
+
+  # Unset the swarm key variable
+  unset IPFS_SWARM_KEY
+
+  # Check during initialization if a swarm key was provided and
+  # copy it to the ipfs directory with the right permissions
+  # WARNING: This will replace the swarm key if it exists
+  if [ ! -z "$IPFS_SWARM_KEY_FILE" ] ; then
+    echo "Copying swarm key from file..."
+    install -m $SWARM_KEY_PERM "$IPFS_SWARM_KEY_FILE" "$SWARM_KEY_FILE" || exit 1
+  fi
+
+  # Unset the swarm key file variable
+  unset IPFS_SWARM_KEY_FILE
+
 fi
 
 exec ipfs "$@"