enh: add a command line interface

Resolves: #46.

docs/cli.rst

@@ -0,0 +1,7 @@
+======================================================
+Using the client with the Command-line interface (CLI)
+======================================================
+
+.. click:: templateflow.cli:main
+  :prog: cli
+  :nested: full

docs/conf.py

@@ -16,7 +16,7 @@
 # -- Project information -----------------------------------------------------
 project = __packagename__
 copyright = __copyright__
-author = "The TemplateFlow Developers"
+author = "The NiPreps Developers"
 
 # The full version, including alpha/beta/rc tags
 release = __version__
@@ -40,6 +40,7 @@
     "sphinx.ext.viewcode",
     "sphinxcontrib.apidoc",
     "nbsphinx",
+    "sphinx_click",
 ]
 
 autodoc_mock_imports = [

docs/environment.yml

@@ -206,3 +206,4 @@ dependencies:
     - hatchling
     - hatch-vcs
     - nipreps-versions
+    - sphinx-click

docs/index.rst

@@ -12,6 +12,7 @@ Contents
 
     installation
     examples
+    cli
     datalad
     api
     changes

pyproject.toml

@@ -50,7 +50,7 @@ doc = [
     "packaging",
     "pydot>=1.2.3",
     "pydotplus",
-    "sphinx-argparse",
+    "sphinx-click",
     "sphinx ~= 4.0",
     "sphinx_rtd_theme >= 0.4.3",
     "sphinxcontrib-apidoc",
@@ -61,6 +61,9 @@ tests = ["templateflow[test]"]
 docs = ["templateflow[doc]"]
 all = ["templateflow[datalad,doc,test]"]
 
+[project.scripts]
+templateflow = "templateflow.cli:main"
+
 #
 # Hatch configurations
 #

templateflow/cli.py

@@ -0,0 +1,153 @@
+# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
+# vi: set ft=python sts=4 ts=4 sw=4 et:
+#
+# Copyright 2024 The NiPreps Developers <nipreps@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# We support and encourage derived works from this project, please read
+# about our expectations at
+#
+#     https://www.nipreps.org/community/licensing/
+#
+"""The TemplateFlow Python Client command-line interface (CLI)."""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import click
+from click.decorators import FC, Option, _param_memo
+
+from templateflow import __package__, api
+from templateflow._loader import Loader as _Loader
+from templateflow.conf import TF_HOME, TF_USE_DATALAD
+
+load_data = _Loader(__package__)
+
+ENTITY_SHORTHANDS = {
+    # 'template': ('--tpl', '-t'),
+    'resolution': ('--res', ),
+    'density': ('--den', ),
+    'atlas': ('-a', ),
+    'suffix': ('-s', ),
+    'desc': ('-d', '--description'),
+    'extension': ('--ext', '-x'),
+    'label': ('-l', ),
+    'segmentation': ('--seg', ),
+}
+ENTITY_EXCLUDE = {'template', 'description'}
+TEMPLATE_LIST = api.get_templates()
+
+
+def _nulls(s):
+    return None if s == 'null' else s
+
+
+def entity_opts():
+    """Attaches all entities as options to the command."""
+
+    entities = json.loads(
+        Path(load_data('conf/config.json')).read_text()
+    )['entities']
+
+    args = [
+        (
+            f"--{e['name']}",
+            *ENTITY_SHORTHANDS.get(e['name'], ())
+        )
+        for e in entities if e['name'] not in ENTITY_EXCLUDE
+    ]
+
+    def decorator(f: FC) -> FC:
+        for arg in reversed(args):
+            _param_memo(f, Option(arg, type=str, default=''))
+        return f
+
+    return decorator
+
+
+@click.group()
+@click.version_option(message='TemplateFlow Python Client %(version)s')
+def main():
+    """The TemplateFlow Python Client command-line interface (CLI)."""
+    pass
+
+
+@main.command()
+def config():
+    """Print-out configuration."""
+    click.echo(f"""Current TemplateFlow settings:
+
+    TEMPLATEFLOW_HOME={TF_HOME}
+    TEMPLATEFLOW_USE_DATALAD={'on' if TF_USE_DATALAD else 'off'}
+""")
+
+
+@main.command()
+def wipe():
+    """Wipe out a local S3 (direct-download) TemplateFlow Archive."""
+    click.echo(f'This will wipe out all data downloaded into {TF_HOME}.')
+
+    if click.confirm('Do you want to continue?'):
+        value = click.prompt(
+            f'Please write the path of your local archive ({TF_HOME})',
+            default='(abort)',
+            show_default=False,
+        )
+        if value.strip() == str(TF_HOME):
+            from templateflow.conf import wipe
+
+            wipe()
+            click.echo(f'{TF_HOME} was wiped out.')
+            return
+    click.echo(f'Aborted! {TF_HOME} WAS NOT wiped out.')
+
+
+@main.command()
+def update():
+    """Update the local TemplateFlow Archive."""
+    from templateflow.conf import update as _update
+
+    click.echo(
+        f'Successfully updated local TemplateFlow Archive: {TF_HOME}.'
+        if _update()
+        else 'TemplateFlow Archive not updated.'
+    )
+
+
+@main.command()
+@entity_opts()
+@click.argument('template', type=click.Choice(TEMPLATE_LIST))
+def ls(template, **kwargs):
+    """List the assets corresponding to template and optional filters."""
+    entities = {k: _nulls(v) for k, v in kwargs.items() if v != ''}
+    click.echo(
+        '\n'.join(f'{match}' for match in api.ls(template, **entities))
+    )
+
+
+@main.command()
+@entity_opts()
+@click.argument('template', type=click.Choice(TEMPLATE_LIST))
+def get(template, **kwargs):
+    """Fetch the assets corresponding to template and optional filters."""
+    entities = {k: _nulls(v) for k, v in kwargs.items() if v != ''}
+    click.echo(
+        '\n'.join(f'{match}' for match in api.get(template, **entities))
+    )
+
+
+if __name__ == '__main__':
+    """ Install entry-point """
+    main()

templateflow/conf/bids.py

@@ -23,7 +23,7 @@
 """Extending pyBIDS for querying TemplateFlow."""
 from bids.layout import BIDSLayout, add_config_paths
 
-from . import load_data
+from templateflow.conf import load_data
 
 add_config_paths(templateflow=load_data('config.json'))