add butler prune-collections subcommand

python/lsst/daf/butler/cli/cmd/__init__.py

@@ -19,9 +19,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-__all__ = ["butler_import", "create", "config_dump", "config_validate", "query_collections",
-           "query_dataset_types"]
+__all__ = ["butler_import", "create", "config_dump", "config_validate", "prune_collection",
+           "query_collections", "query_dataset_types"]
 
 
-from .commands import (butler_import, create, config_dump, config_validate, query_collections,
-                       query_dataset_types)
+from .commands import (butler_import, create, config_dump, config_validate, prune_collection,
+                       query_collections, query_dataset_types)

python/lsst/daf/butler/cli/cmd/commands.py

@@ -24,9 +24,9 @@
 
 from ..opt import (collection_type_option, dataset_type_option, directory_argument, glob_argument,
                    repo_argument, run_option, transfer_option, verbose_option)
-from ..utils import split_commas, cli_handle_exception, typeStrAcceptsMultiple
-from ...script import (butlerImport, createRepo, configDump, configValidate, queryCollections,
-                       queryDatasetTypes)
+from ..utils import cli_handle_exception, split_commas, typeStrAcceptsMultiple, unwrap
+from ...script import (butlerImport, createRepo, configDump, configValidate, pruneCollection,
+                       queryCollections, queryDatasetTypes)
 
 willCreateRepoHelp = "REPO is the URI or path to the new repository. Will be created if it does not exist."
 existingRepoHelp = "REPO is the URI or path to an existing data repository root or configuration file."
@@ -100,6 +100,26 @@ def config_validate(*args, **kwargs):
         raise click.exceptions.Exit(1)
 
 
+@click.command()
+@repo_argument(required=True)
+@click.option("--collection",
+              help=unwrap("""Name of the collection to remove. If this is a TAGGED or CHAINED collection,
+                          datasets within the collection are not modified unless --unstore is passed. If this
+                          is a RUN collection, --purge and --unstore must be passed, and all datasets in it
+                          are fully removed from the data repository. """))
+@click.option("--purge",
+              help=unwrap("""Permit RUN collections to be removed, fully removing datasets within them.
+                          Requires --unstore as an added precaution against accidental deletion. Must not be
+                          passed if the collection is not a RUN."""),
+              is_flag=True)
+@click.option("--unstore",
+              help=("""Remove all datasets in the collection from all datastores in which they appear."""),
+              is_flag=True)
+def prune_collection(**kwargs):
+    """Remove a collection and possibly prune datasets within it."""
+    cli_handle_exception(pruneCollection, **kwargs)
+
+
 @click.command(short_help="Search for collections.")
 @repo_argument(required=True)
 @glob_argument(help="GLOB is one or more glob-style expressions that fully or partially identify the "

python/lsst/daf/butler/script/__init__.py

@@ -23,5 +23,6 @@
 from .createRepo import createRepo
 from .configDump import configDump
 from .configValidate import configValidate
+from .pruneCollection import pruneCollection
 from .queryCollections import queryCollections
 from .queryDatasetTypes import queryDatasetTypes

python/lsst/daf/butler/script/pruneCollection.py

@@ -0,0 +1,40 @@
+# This file is part of daf_butler.
+#
+# Developed for the LSST Data Management System.
+# This product includes software developed by the LSST Project
+# (http://www.lsst.org).
+# See the COPYRIGHT file at the top-level directory of this distribution
+# for details of code ownership.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .. import Butler
+
+
+def pruneCollection(repo, collection, purge, unstore):
+    """Remove a collection and possibly prune datasets within it.
+
+    Parameters
+    ----------
+    repo : `str`
+        Same as the ``config`` argument to ``Butler.__init__``
+    collection : `str`
+        Same as the ``name`` argument to ``Butler.pruneCollection``.
+    purge : `bool`, optional
+        Same as the ``purge`` argument to ``Butler.pruneCollection``.
+    unstore: `bool`, optional
+        Same as the ``unstore`` argument to ``Butler.pruneCollection``.
+    """
+    butler = Butler(repo, writeable=True)
+    butler.pruneCollection(collection, purge, unstore)