Instantiation of TEMPLATE rule sometimes has a command in generated ninja

rule TEMPLATE

  command = $SCONS_INVOCATION $out

  description = Rendering $out

  pool = scons_pool

  restat = 1

env.Command(

    target=[

        'feature_flag_test.idl',

    ],

    source=[

        '#buildscripts/cheetah_source_generator.py',

        'feature_flag_test.idl.tpl',

        '$BUILD_DIR/mongo/util/version/releases.yml',

    ],

    action=[

        '$PYTHON ${SOURCES[0]} -o ${TARGETS[0]} ${SOURCES[1]} ${SOURCES[2]} ${MONGO_VERSION}',

    ],

    # Ensure that that SCons is used to produce this file rather than Ninja, to avoid spurious

    # dependency cycles due to how we manage generated sources with Ninja.

    NINJA_TEMPLATE=True,

)

build build/aib_make_archive.py build/cached/mongo/config.h $

    build/cached/mongo/idl/feature_flag_test.idl build/cached/mongo/util/version_constants.h $

    build/cached/resmoke.ini build/cached/third_party/third_party_shim.cpp $

    build/cached/third_party/wiredtiger/wiredtiger.h: TEMPLATE src/mongo/config.h.in $

    buildscripts/cheetah_source_generator.py src/mongo/idl/feature_flag_test.idl.tpl $

    src/mongo/util/version/releases.yml src/mongo/util/version_constants.h.in $

    src/third_party/wiredtiger/src/include/wiredtiger.in | $

    buildscripts/cheetah_source_generator.py src/mongo/util/version/releases.yml $

    src/mongo/idl/feature_flag_test.idl.tpl @install_dir@$ install//usr/locala/bin

  cmd = /Users/acm/.virtualenvs/mongo/bin/python buildscripts/cheetah_source_generator.py -o $

      build/cached/mongo/idl/feature_flag_test.idl src/mongo/idl/feature_flag_test.idl.tpl $

      src/mongo/util/version/releases.yml 5.1.0-alpha-1746-g1cf0b1f

  env = export PATH='/usr/local/bin:/opt/bin:/bin:/usr/bin';export $

      PATHOSX='/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Library/Apple/usr/bin';