29def makeDiscreteSkyMap(repo, config_file, collections, instrument,
30 skymap_id='discrete', old_skymap_id=None):
31 """Implements the command line interface `butler make-discrete-skymap` subcommand,
32 should only be called by command line tools and unit test code that tests
35 Constructs a skymap from calibrated exposure in the butler repository
40 URI to the location to read the repo.
41 config_file : `str` or `None`
42 URI to a config file that contains overrides to the skymap config.
43 collections : `list` [`str`]
44 An expression specifying the collections to be searched (in order) when
45 reading datasets, and optionally dataset type restrictions on them.
46 At least one collection must be specified. This is the collection
47 with the calibrated exposures.
49 The name or fully-qualified class name of an instrument.
50 skymap_id : `str`, optional
51 The identifier of the skymap to save. Default is 'discrete'.
52 old_skymap_id : `str`, optional
53 The identifer of the skymap to append to. Must differ from
54 ``skymap_id``. Ignored unless ``config.doAppend=True``.
56 butler = Butler(repo, collections=collections, writeable=
True)
57 instr = Instrument.from_string(instrument, butler.registry)
59 instr.applyConfigOverrides(MakeDiscreteSkyMapTask._DefaultName, config)
61 if config_file
is not None:
62 resource = ResourcePath(config_file)
63 with resource.as_local()
as local_config:
64 config.load(local_config.ospath)
70 if old_skymap_id
is None:
71 raise ValueError(
"old_skymap_id must be provided if config.doAppend is True.")
72 dataId = {
'skymap': old_skymap_id}
74 oldSkyMap = butler.get(BaseSkyMap.SKYMAP_DATASET_TYPE_NAME, collections=collections,
76 except LookupError
as e:
77 msg = (f
"Could not find seed skymap with dataId {dataId} "
78 f
"in collections {collections} but doAppend is {config.doAppend}. Aborting...")
79 raise LookupError(msg, *e.args[1:])
81 datasets = butler.registry.queryDatasets(
'calexp', collections=collections)
82 wcs_bbox_tuple_list = [(butler.get(ref.makeComponentRef(
"wcs")),
83 butler.get(ref.makeComponentRef(
"bbox")))
86 result = task.run(wcs_bbox_tuple_list, oldSkyMap)
87 result.skyMap.register(skymap_id, butler)