prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  -f does not work as expected in rio-warp
  Running on a preexisting file
  
  ```
  » rio warp tests/data/RGB.byte.tif /tmp/hi.tif
  Error: Could not open file : file exists and won't be overwritten without use of the `-f` or `-o` options.
  ```
  
  Then
  
  ```
  » rio warp tests/data/RGB.byte.tif /tmp/hi.tif -f
  Error: -f option requires an argument
  ```
  
  But
  
  ```
  rio warp tests/data/RGB.byte.tif /tmp/hi.tif --force-overwrite
  ```
  
  Works.
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `rasterio/rio/helpers.py`
  Content:
  ```
  1 """
  2 Helper objects used by multiple CLI commands.
  3 """
  4 
  5 import json
  6 import os
  7 
  8 from rasterio.errors import FileOverwriteError
  9 
  10 
  11 def coords(obj):
  12     """Yield all coordinate coordinate tuples from a geometry or feature.
  13     From python-geojson package."""
  14     if isinstance(obj, (tuple, list)):
  15         coordinates = obj
  16     elif 'geometry' in obj:
  17         coordinates = obj['geometry']['coordinates']
  18     else:
  19         coordinates = obj.get('coordinates', obj)
  20     for e in coordinates:
  21         if isinstance(e, (float, int)):
  22             yield tuple(coordinates)
  23             break
  24         else:
  25             for f in coords(e):
  26                 yield f
  27 
  28 
  29 def write_features(
  30         fobj, collection, sequence=False, geojson_type='feature', use_rs=False,
  31         **dump_kwds):
  32     """Read an iterator of (feat, bbox) pairs and write to file using
  33     the selected modes."""
  34     # Sequence of features expressed as bbox, feature, or collection.
  35     if sequence:
  36         for feat in collection():
  37             xs, ys = zip(*coords(feat))
  38             bbox = (min(xs), min(ys), max(xs), max(ys))
  39             if use_rs:
  40                 fobj.write(u'\u001e')
  41             if geojson_type == 'feature':
  42                 fobj.write(json.dumps(feat, **dump_kwds))
  43             elif geojson_type == 'bbox':
  44                 fobj.write(json.dumps(bbox, **dump_kwds))
  45             else:
  46                 fobj.write(
  47                     json.dumps({
  48                         'type': 'FeatureCollection',
  49                         'bbox': bbox,
  50                         'features': [feat]}, **dump_kwds))
  51             fobj.write('\n')
  52     # Aggregate all features into a single object expressed as
  53     # bbox or collection.
  54     else:
  55         features = list(collection())
  56         if geojson_type == 'bbox':
  57             fobj.write(json.dumps(collection.bbox, **dump_kwds))
  58         elif geojson_type == 'feature':
  59             fobj.write(json.dumps(features[0], **dump_kwds))
  60         else:
  61             fobj.write(json.dumps({
  62                 'bbox': collection.bbox,
  63                 'type': 'FeatureCollection',
  64                 'features': features},
  65                 **dump_kwds))
  66         fobj.write('\n')
  67 
  68 
  69 def resolve_inout(input=None, output=None, files=None, force_overwrite=False):
  70     """Resolves inputs and outputs from standard args and options.
  71 
  72     :param input: a single input filename, optional.
  73     :param output: a single output filename, optional.
  74     :param files: a sequence of filenames in which the last is the
  75         output filename.
  76     :param force_overwrite: whether to force overwriting the output
  77         file, bool.
  78     :return: the resolved output filename and input filenames as a
  79         tuple of length 2.
  80 
  81     If provided, the :param:`output` file may be overwritten. An output
  82     file extracted from :param:`files` will not be overwritten unless
  83     :param:`force_overwrite` is `True`.
  84     """
  85     resolved_output = output or (files[-1] if files else None)
  86     force_overwrite = output is not None or force_overwrite
  87     if not force_overwrite and resolved_output and os.path.exists(
  88             resolved_output):
  89         raise FileOverwriteError(
  90             "file exists and won't be overwritten without use of the "
  91             "`-f` or `-o` options.")
  92     resolved_inputs = (
  93         [input] if input else [] +
  94         list(files[:-1 if not output else None]) if files else [])
  95     return resolved_output, resolved_inputs
  96 
  97 
  98 def to_lower(ctx, param, value):
  99     """Click callback, converts values to lowercase."""
  100     return value.lower()
  101
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/rasterio/rio/helpers.py b/rasterio/rio/helpers.py
  --- a/rasterio/rio/helpers.py
  +++ b/rasterio/rio/helpers.py
  @@ -88,7 +88,7 @@
               resolved_output):
           raise FileOverwriteError(
               "file exists and won't be overwritten without use of the "
  -            "`-f` or `-o` options.")
  +            "`--force-overwrite` or `--output` options.")
       resolved_inputs = (
           [input] if input else [] +
           list(files[:-1 if not output else None]) if files else [])
  
verification_info: {"golden_diff": "diff --git a/rasterio/rio/helpers.py b/rasterio/rio/helpers.py\n--- a/rasterio/rio/helpers.py\n+++ b/rasterio/rio/helpers.py\n@@ -88,7 +88,7 @@\n             resolved_output):\n         raise FileOverwriteError(\n             \"file exists and won't be overwritten without use of the \"\n-            \"`-f` or `-o` options.\")\n+            \"`--force-overwrite` or `--output` options.\")\n     resolved_inputs = (\n         [input] if input else [] +\n         list(files[:-1 if not output else None]) if files else [])\n", "issue": "-f does not work as expected in rio-warp\nRunning on a preexisting file\n\n```\n\u00bb rio warp tests/data/RGB.byte.tif /tmp/hi.tif\nError: Could not open file : file exists and won't be overwritten without use of the `-f` or `-o` options.\n```\n\nThen\n\n```\n\u00bb rio warp tests/data/RGB.byte.tif /tmp/hi.tif -f\nError: -f option requires an argument\n```\n\nBut\n\n```\nrio warp tests/data/RGB.byte.tif /tmp/hi.tif --force-overwrite\n```\n\nWorks.\n\n", "before_files": [{"content": "\"\"\"\nHelper objects used by multiple CLI commands.\n\"\"\"\n\nimport json\nimport os\n\nfrom rasterio.errors import FileOverwriteError\n\n\ndef coords(obj):\n    \"\"\"Yield all coordinate coordinate tuples from a geometry or feature.\n    From python-geojson package.\"\"\"\n    if isinstance(obj, (tuple, list)):\n        coordinates = obj\n    elif 'geometry' in obj:\n        coordinates = obj['geometry']['coordinates']\n    else:\n        coordinates = obj.get('coordinates', obj)\n    for e in coordinates:\n        if isinstance(e, (float, int)):\n            yield tuple(coordinates)\n            break\n        else:\n            for f in coords(e):\n                yield f\n\n\ndef write_features(\n        fobj, collection, sequence=False, geojson_type='feature', use_rs=False,\n        **dump_kwds):\n    \"\"\"Read an iterator of (feat, bbox) pairs and write to file using\n    the selected modes.\"\"\"\n    # Sequence of features expressed as bbox, feature, or collection.\n    if sequence:\n        for feat in collection():\n            xs, ys = zip(*coords(feat))\n            bbox = (min(xs), min(ys), max(xs), max(ys))\n            if use_rs:\n                fobj.write(u'\\u001e')\n            if geojson_type == 'feature':\n                fobj.write(json.dumps(feat, **dump_kwds))\n            elif geojson_type == 'bbox':\n                fobj.write(json.dumps(bbox, **dump_kwds))\n            else:\n                fobj.write(\n                    json.dumps({\n                        'type': 'FeatureCollection',\n                        'bbox': bbox,\n                        'features': [feat]}, **dump_kwds))\n            fobj.write('\\n')\n    # Aggregate all features into a single object expressed as\n    # bbox or collection.\n    else:\n        features = list(collection())\n        if geojson_type == 'bbox':\n            fobj.write(json.dumps(collection.bbox, **dump_kwds))\n        elif geojson_type == 'feature':\n            fobj.write(json.dumps(features[0], **dump_kwds))\n        else:\n            fobj.write(json.dumps({\n                'bbox': collection.bbox,\n                'type': 'FeatureCollection',\n                'features': features},\n                **dump_kwds))\n        fobj.write('\\n')\n\n\ndef resolve_inout(input=None, output=None, files=None, force_overwrite=False):\n    \"\"\"Resolves inputs and outputs from standard args and options.\n\n    :param input: a single input filename, optional.\n    :param output: a single output filename, optional.\n    :param files: a sequence of filenames in which the last is the\n        output filename.\n    :param force_overwrite: whether to force overwriting the output\n        file, bool.\n    :return: the resolved output filename and input filenames as a\n        tuple of length 2.\n\n    If provided, the :param:`output` file may be overwritten. An output\n    file extracted from :param:`files` will not be overwritten unless\n    :param:`force_overwrite` is `True`.\n    \"\"\"\n    resolved_output = output or (files[-1] if files else None)\n    force_overwrite = output is not None or force_overwrite\n    if not force_overwrite and resolved_output and os.path.exists(\n            resolved_output):\n        raise FileOverwriteError(\n            \"file exists and won't be overwritten without use of the \"\n            \"`-f` or `-o` options.\")\n    resolved_inputs = (\n        [input] if input else [] +\n        list(files[:-1 if not output else None]) if files else [])\n    return resolved_output, resolved_inputs\n\n\ndef to_lower(ctx, param, value):\n    \"\"\"Click callback, converts values to lowercase.\"\"\"\n    return value.lower()\n", "path": "rasterio/rio/helpers.py"}], "after_files": [{"content": "\"\"\"\nHelper objects used by multiple CLI commands.\n\"\"\"\n\nimport json\nimport os\n\nfrom rasterio.errors import FileOverwriteError\n\n\ndef coords(obj):\n    \"\"\"Yield all coordinate coordinate tuples from a geometry or feature.\n    From python-geojson package.\"\"\"\n    if isinstance(obj, (tuple, list)):\n        coordinates = obj\n    elif 'geometry' in obj:\n        coordinates = obj['geometry']['coordinates']\n    else:\n        coordinates = obj.get('coordinates', obj)\n    for e in coordinates:\n        if isinstance(e, (float, int)):\n            yield tuple(coordinates)\n            break\n        else:\n            for f in coords(e):\n                yield f\n\n\ndef write_features(\n        fobj, collection, sequence=False, geojson_type='feature', use_rs=False,\n        **dump_kwds):\n    \"\"\"Read an iterator of (feat, bbox) pairs and write to file using\n    the selected modes.\"\"\"\n    # Sequence of features expressed as bbox, feature, or collection.\n    if sequence:\n        for feat in collection():\n            xs, ys = zip(*coords(feat))\n            bbox = (min(xs), min(ys), max(xs), max(ys))\n            if use_rs:\n                fobj.write(u'\\u001e')\n            if geojson_type == 'feature':\n                fobj.write(json.dumps(feat, **dump_kwds))\n            elif geojson_type == 'bbox':\n                fobj.write(json.dumps(bbox, **dump_kwds))\n            else:\n                fobj.write(\n                    json.dumps({\n                        'type': 'FeatureCollection',\n                        'bbox': bbox,\n                        'features': [feat]}, **dump_kwds))\n            fobj.write('\\n')\n    # Aggregate all features into a single object expressed as\n    # bbox or collection.\n    else:\n        features = list(collection())\n        if geojson_type == 'bbox':\n            fobj.write(json.dumps(collection.bbox, **dump_kwds))\n        elif geojson_type == 'feature':\n            fobj.write(json.dumps(features[0], **dump_kwds))\n        else:\n            fobj.write(json.dumps({\n                'bbox': collection.bbox,\n                'type': 'FeatureCollection',\n                'features': features},\n                **dump_kwds))\n        fobj.write('\\n')\n\n\ndef resolve_inout(input=None, output=None, files=None, force_overwrite=False):\n    \"\"\"Resolves inputs and outputs from standard args and options.\n\n    :param input: a single input filename, optional.\n    :param output: a single output filename, optional.\n    :param files: a sequence of filenames in which the last is the\n        output filename.\n    :param force_overwrite: whether to force overwriting the output\n        file, bool.\n    :return: the resolved output filename and input filenames as a\n        tuple of length 2.\n\n    If provided, the :param:`output` file may be overwritten. An output\n    file extracted from :param:`files` will not be overwritten unless\n    :param:`force_overwrite` is `True`.\n    \"\"\"\n    resolved_output = output or (files[-1] if files else None)\n    force_overwrite = output is not None or force_overwrite\n    if not force_overwrite and resolved_output and os.path.exists(\n            resolved_output):\n        raise FileOverwriteError(\n            \"file exists and won't be overwritten without use of the \"\n            \"`--force-overwrite` or `--output` options.\")\n    resolved_inputs = (\n        [input] if input else [] +\n        list(files[:-1 if not output else None]) if files else [])\n    return resolved_output, resolved_inputs\n\n\ndef to_lower(ctx, param, value):\n    \"\"\"Click callback, converts values to lowercase.\"\"\"\n    return value.lower()\n", "path": "rasterio/rio/helpers.py"}]}