compare all built Fuchsia packages with a prior package snapshot
usage: fx delta [[--name|-n NAME] | [--source|-s PATH]] [--build] [--help-delta] [DELTA_ARGS...] Compare metadata of all Fuchsia packages with a prior package snapshot. --name|-n NAME Set the NAME of the source package snapshot (Default: "system") --source|-s PATH Read the source snapshot from the specified PATH (Default: $FUCHSIA_BUILD_DIR/snapshots/$NAME.snapshot) --help-delta Show command line help for "pm delta" --build Build the current package snapshot before comparing it to the previously saved snapshot DELTA_ARGS Unknown arguments are passed through to "pm delta"