prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Command in autogenerated requirements.txt can be shortened
  When I run `pip-compile`, my requirements.txt has
  
  ```
  #
  # This file is autogenerated by pip-compile
  # To update, run:
  #
  #    pip-compile --output-file requirements.txt requirements.in
  #
  ```
  
  But I think the `--output-file requirements.txt` can just be dropped (for brevity) when the written file itself is named `requirements.txt`.
  
  I'm recommending this because `pip-compile` already goes ahead and modifies `requirements.txt` when no options are specified. Thoughts?
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `piptools/writer.py`
  Content:
  ```
  1 import os
  2 from itertools import chain
  3 
  4 from ._compat import ExitStack
  5 from .click import unstyle
  6 from .io import AtomicSaver
  7 from .logging import log
  8 from .utils import comment, dedup, format_requirement, key_from_req, UNSAFE_PACKAGES
  9 
  10 
  11 class OutputWriter(object):
  12     def __init__(self, src_files, dst_file, dry_run, emit_header, emit_index,
  13                  emit_trusted_host, annotate, generate_hashes,
  14                  default_index_url, index_urls, trusted_hosts, format_control,
  15                  allow_unsafe):
  16         self.src_files = src_files
  17         self.dst_file = dst_file
  18         self.dry_run = dry_run
  19         self.emit_header = emit_header
  20         self.emit_index = emit_index
  21         self.emit_trusted_host = emit_trusted_host
  22         self.annotate = annotate
  23         self.generate_hashes = generate_hashes
  24         self.default_index_url = default_index_url
  25         self.index_urls = index_urls
  26         self.trusted_hosts = trusted_hosts
  27         self.format_control = format_control
  28         self.allow_unsafe = allow_unsafe
  29 
  30     def _sort_key(self, ireq):
  31         return (not ireq.editable, str(ireq.req).lower())
  32 
  33     def write_header(self):
  34         if self.emit_header:
  35             yield comment('#')
  36             yield comment('# This file is autogenerated by pip-compile')
  37             yield comment('# To update, run:')
  38             yield comment('#')
  39             custom_cmd = os.environ.get('CUSTOM_COMPILE_COMMAND')
  40             if custom_cmd:
  41                 yield comment('#    {}'.format(custom_cmd))
  42             else:
  43                 params = []
  44                 if not self.emit_index:
  45                     params += ['--no-index']
  46                 if not self.emit_trusted_host:
  47                     params += ['--no-emit-trusted-host']
  48                 if not self.annotate:
  49                     params += ['--no-annotate']
  50                 if self.generate_hashes:
  51                     params += ["--generate-hashes"]
  52                 if self.allow_unsafe:
  53                     params += ["--allow-unsafe"]
  54                 params += ['--output-file', self.dst_file]
  55                 params += self.src_files
  56                 yield comment('#    pip-compile {}'.format(' '.join(params)))
  57             yield comment('#')
  58 
  59     def write_index_options(self):
  60         if self.emit_index:
  61             for index, index_url in enumerate(dedup(self.index_urls)):
  62                 if index_url.rstrip('/') == self.default_index_url:
  63                     continue
  64                 flag = '--index-url' if index == 0 else '--extra-index-url'
  65                 yield '{} {}'.format(flag, index_url)
  66 
  67     def write_trusted_hosts(self):
  68         if self.emit_trusted_host:
  69             for trusted_host in dedup(self.trusted_hosts):
  70                 yield '--trusted-host {}'.format(trusted_host)
  71 
  72     def write_format_controls(self):
  73         for nb in dedup(self.format_control.no_binary):
  74             yield '--no-binary {}'.format(nb)
  75         for ob in dedup(self.format_control.only_binary):
  76             yield '--only-binary {}'.format(ob)
  77 
  78     def write_flags(self):
  79         emitted = False
  80         for line in chain(self.write_index_options(),
  81                           self.write_trusted_hosts(),
  82                           self.write_format_controls()):
  83             emitted = True
  84             yield line
  85         if emitted:
  86             yield ''
  87 
  88     def _iter_lines(self, results, unsafe_requirements, reverse_dependencies,
  89                     primary_packages, markers, hashes):
  90         for line in self.write_header():
  91             yield line
  92         for line in self.write_flags():
  93             yield line
  94 
  95         unsafe_requirements = {r for r in results if r.name in UNSAFE_PACKAGES} if not unsafe_requirements else unsafe_requirements  # noqa
  96         packages = {r for r in results if r.name not in UNSAFE_PACKAGES}
  97 
  98         packages = sorted(packages, key=self._sort_key)
  99 
  100         for ireq in packages:
  101             line = self._format_requirement(
  102                 ireq, reverse_dependencies, primary_packages,
  103                 markers.get(key_from_req(ireq.req)), hashes=hashes)
  104             yield line
  105 
  106         if unsafe_requirements:
  107             unsafe_requirements = sorted(unsafe_requirements, key=self._sort_key)
  108             yield ''
  109             yield comment('# The following packages are considered to be unsafe in a requirements file:')
  110 
  111             for ireq in unsafe_requirements:
  112                 req = self._format_requirement(ireq,
  113                                                reverse_dependencies,
  114                                                primary_packages,
  115                                                marker=markers.get(key_from_req(ireq.req)),
  116                                                hashes=hashes)
  117                 if not self.allow_unsafe:
  118                     yield comment('# {}'.format(req))
  119                 else:
  120                     yield req
  121 
  122     def write(self, results, unsafe_requirements, reverse_dependencies,
  123               primary_packages, markers, hashes):
  124         with ExitStack() as stack:
  125             f = None
  126             if not self.dry_run:
  127                 f = stack.enter_context(AtomicSaver(self.dst_file))
  128 
  129             for line in self._iter_lines(results, unsafe_requirements, reverse_dependencies,
  130                                          primary_packages, markers, hashes):
  131                 log.info(line)
  132                 if f:
  133                     f.write(unstyle(line).encode('utf-8'))
  134                     f.write(os.linesep.encode('utf-8'))
  135 
  136     def _format_requirement(self, ireq, reverse_dependencies, primary_packages, marker=None, hashes=None):
  137         ireq_hashes = (hashes if hashes is not None else {}).get(ireq)
  138 
  139         line = format_requirement(ireq, marker=marker, hashes=ireq_hashes)
  140 
  141         if not self.annotate or key_from_req(ireq.req) in primary_packages:
  142             return line
  143 
  144         # Annotate what packages this package is required by
  145         required_by = reverse_dependencies.get(ireq.name.lower(), [])
  146         if required_by:
  147             annotation = ", ".join(sorted(required_by))
  148             line = "{:24}{}{}".format(
  149                 line,
  150                 " \\\n    " if ireq_hashes else "  ",
  151                 comment("# via " + annotation))
  152         return line
  153
  ```
  --- 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/piptools/writer.py b/piptools/writer.py
  --- a/piptools/writer.py
  +++ b/piptools/writer.py
  @@ -1,8 +1,9 @@
   import os
  +import sys
   from itertools import chain
   
   from ._compat import ExitStack
  -from .click import unstyle
  +from .click import unstyle, get_os_args
   from .io import AtomicSaver
   from .logging import log
   from .utils import comment, dedup, format_requirement, key_from_req, UNSAFE_PACKAGES
  @@ -40,20 +41,9 @@
               if custom_cmd:
                   yield comment('#    {}'.format(custom_cmd))
               else:
  -                params = []
  -                if not self.emit_index:
  -                    params += ['--no-index']
  -                if not self.emit_trusted_host:
  -                    params += ['--no-emit-trusted-host']
  -                if not self.annotate:
  -                    params += ['--no-annotate']
  -                if self.generate_hashes:
  -                    params += ["--generate-hashes"]
  -                if self.allow_unsafe:
  -                    params += ["--allow-unsafe"]
  -                params += ['--output-file', self.dst_file]
  -                params += self.src_files
  -                yield comment('#    pip-compile {}'.format(' '.join(params)))
  +                prog = os.path.basename(sys.argv[0])
  +                args = ' '.join(get_os_args())
  +                yield comment('#    {prog} {args}'.format(prog=prog, args=args))
               yield comment('#')
   
       def write_index_options(self):
  
verification_info: {"golden_diff": "diff --git a/piptools/writer.py b/piptools/writer.py\n--- a/piptools/writer.py\n+++ b/piptools/writer.py\n@@ -1,8 +1,9 @@\n import os\n+import sys\n from itertools import chain\n \n from ._compat import ExitStack\n-from .click import unstyle\n+from .click import unstyle, get_os_args\n from .io import AtomicSaver\n from .logging import log\n from .utils import comment, dedup, format_requirement, key_from_req, UNSAFE_PACKAGES\n@@ -40,20 +41,9 @@\n             if custom_cmd:\n                 yield comment('#    {}'.format(custom_cmd))\n             else:\n-                params = []\n-                if not self.emit_index:\n-                    params += ['--no-index']\n-                if not self.emit_trusted_host:\n-                    params += ['--no-emit-trusted-host']\n-                if not self.annotate:\n-                    params += ['--no-annotate']\n-                if self.generate_hashes:\n-                    params += [\"--generate-hashes\"]\n-                if self.allow_unsafe:\n-                    params += [\"--allow-unsafe\"]\n-                params += ['--output-file', self.dst_file]\n-                params += self.src_files\n-                yield comment('#    pip-compile {}'.format(' '.join(params)))\n+                prog = os.path.basename(sys.argv[0])\n+                args = ' '.join(get_os_args())\n+                yield comment('#    {prog} {args}'.format(prog=prog, args=args))\n             yield comment('#')\n \n     def write_index_options(self):\n", "issue": "Command in autogenerated requirements.txt can be shortened\nWhen I run `pip-compile`, my requirements.txt has\r\n\r\n```\r\n#\r\n# This file is autogenerated by pip-compile\r\n# To update, run:\r\n#\r\n#    pip-compile --output-file requirements.txt requirements.in\r\n#\r\n```\r\n\r\nBut I think the `--output-file requirements.txt` can just be dropped (for brevity) when the written file itself is named `requirements.txt`.\r\n\r\nI'm recommending this because `pip-compile` already goes ahead and modifies `requirements.txt` when no options are specified. Thoughts?\n", "before_files": [{"content": "import os\nfrom itertools import chain\n\nfrom ._compat import ExitStack\nfrom .click import unstyle\nfrom .io import AtomicSaver\nfrom .logging import log\nfrom .utils import comment, dedup, format_requirement, key_from_req, UNSAFE_PACKAGES\n\n\nclass OutputWriter(object):\n    def __init__(self, src_files, dst_file, dry_run, emit_header, emit_index,\n                 emit_trusted_host, annotate, generate_hashes,\n                 default_index_url, index_urls, trusted_hosts, format_control,\n                 allow_unsafe):\n        self.src_files = src_files\n        self.dst_file = dst_file\n        self.dry_run = dry_run\n        self.emit_header = emit_header\n        self.emit_index = emit_index\n        self.emit_trusted_host = emit_trusted_host\n        self.annotate = annotate\n        self.generate_hashes = generate_hashes\n        self.default_index_url = default_index_url\n        self.index_urls = index_urls\n        self.trusted_hosts = trusted_hosts\n        self.format_control = format_control\n        self.allow_unsafe = allow_unsafe\n\n    def _sort_key(self, ireq):\n        return (not ireq.editable, str(ireq.req).lower())\n\n    def write_header(self):\n        if self.emit_header:\n            yield comment('#')\n            yield comment('# This file is autogenerated by pip-compile')\n            yield comment('# To update, run:')\n            yield comment('#')\n            custom_cmd = os.environ.get('CUSTOM_COMPILE_COMMAND')\n            if custom_cmd:\n                yield comment('#    {}'.format(custom_cmd))\n            else:\n                params = []\n                if not self.emit_index:\n                    params += ['--no-index']\n                if not self.emit_trusted_host:\n                    params += ['--no-emit-trusted-host']\n                if not self.annotate:\n                    params += ['--no-annotate']\n                if self.generate_hashes:\n                    params += [\"--generate-hashes\"]\n                if self.allow_unsafe:\n                    params += [\"--allow-unsafe\"]\n                params += ['--output-file', self.dst_file]\n                params += self.src_files\n                yield comment('#    pip-compile {}'.format(' '.join(params)))\n            yield comment('#')\n\n    def write_index_options(self):\n        if self.emit_index:\n            for index, index_url in enumerate(dedup(self.index_urls)):\n                if index_url.rstrip('/') == self.default_index_url:\n                    continue\n                flag = '--index-url' if index == 0 else '--extra-index-url'\n                yield '{} {}'.format(flag, index_url)\n\n    def write_trusted_hosts(self):\n        if self.emit_trusted_host:\n            for trusted_host in dedup(self.trusted_hosts):\n                yield '--trusted-host {}'.format(trusted_host)\n\n    def write_format_controls(self):\n        for nb in dedup(self.format_control.no_binary):\n            yield '--no-binary {}'.format(nb)\n        for ob in dedup(self.format_control.only_binary):\n            yield '--only-binary {}'.format(ob)\n\n    def write_flags(self):\n        emitted = False\n        for line in chain(self.write_index_options(),\n                          self.write_trusted_hosts(),\n                          self.write_format_controls()):\n            emitted = True\n            yield line\n        if emitted:\n            yield ''\n\n    def _iter_lines(self, results, unsafe_requirements, reverse_dependencies,\n                    primary_packages, markers, hashes):\n        for line in self.write_header():\n            yield line\n        for line in self.write_flags():\n            yield line\n\n        unsafe_requirements = {r for r in results if r.name in UNSAFE_PACKAGES} if not unsafe_requirements else unsafe_requirements  # noqa\n        packages = {r for r in results if r.name not in UNSAFE_PACKAGES}\n\n        packages = sorted(packages, key=self._sort_key)\n\n        for ireq in packages:\n            line = self._format_requirement(\n                ireq, reverse_dependencies, primary_packages,\n                markers.get(key_from_req(ireq.req)), hashes=hashes)\n            yield line\n\n        if unsafe_requirements:\n            unsafe_requirements = sorted(unsafe_requirements, key=self._sort_key)\n            yield ''\n            yield comment('# The following packages are considered to be unsafe in a requirements file:')\n\n            for ireq in unsafe_requirements:\n                req = self._format_requirement(ireq,\n                                               reverse_dependencies,\n                                               primary_packages,\n                                               marker=markers.get(key_from_req(ireq.req)),\n                                               hashes=hashes)\n                if not self.allow_unsafe:\n                    yield comment('# {}'.format(req))\n                else:\n                    yield req\n\n    def write(self, results, unsafe_requirements, reverse_dependencies,\n              primary_packages, markers, hashes):\n        with ExitStack() as stack:\n            f = None\n            if not self.dry_run:\n                f = stack.enter_context(AtomicSaver(self.dst_file))\n\n            for line in self._iter_lines(results, unsafe_requirements, reverse_dependencies,\n                                         primary_packages, markers, hashes):\n                log.info(line)\n                if f:\n                    f.write(unstyle(line).encode('utf-8'))\n                    f.write(os.linesep.encode('utf-8'))\n\n    def _format_requirement(self, ireq, reverse_dependencies, primary_packages, marker=None, hashes=None):\n        ireq_hashes = (hashes if hashes is not None else {}).get(ireq)\n\n        line = format_requirement(ireq, marker=marker, hashes=ireq_hashes)\n\n        if not self.annotate or key_from_req(ireq.req) in primary_packages:\n            return line\n\n        # Annotate what packages this package is required by\n        required_by = reverse_dependencies.get(ireq.name.lower(), [])\n        if required_by:\n            annotation = \", \".join(sorted(required_by))\n            line = \"{:24}{}{}\".format(\n                line,\n                \" \\\\\\n    \" if ireq_hashes else \"  \",\n                comment(\"# via \" + annotation))\n        return line\n", "path": "piptools/writer.py"}], "after_files": [{"content": "import os\nimport sys\nfrom itertools import chain\n\nfrom ._compat import ExitStack\nfrom .click import unstyle, get_os_args\nfrom .io import AtomicSaver\nfrom .logging import log\nfrom .utils import comment, dedup, format_requirement, key_from_req, UNSAFE_PACKAGES\n\n\nclass OutputWriter(object):\n    def __init__(self, src_files, dst_file, dry_run, emit_header, emit_index,\n                 emit_trusted_host, annotate, generate_hashes,\n                 default_index_url, index_urls, trusted_hosts, format_control,\n                 allow_unsafe):\n        self.src_files = src_files\n        self.dst_file = dst_file\n        self.dry_run = dry_run\n        self.emit_header = emit_header\n        self.emit_index = emit_index\n        self.emit_trusted_host = emit_trusted_host\n        self.annotate = annotate\n        self.generate_hashes = generate_hashes\n        self.default_index_url = default_index_url\n        self.index_urls = index_urls\n        self.trusted_hosts = trusted_hosts\n        self.format_control = format_control\n        self.allow_unsafe = allow_unsafe\n\n    def _sort_key(self, ireq):\n        return (not ireq.editable, str(ireq.req).lower())\n\n    def write_header(self):\n        if self.emit_header:\n            yield comment('#')\n            yield comment('# This file is autogenerated by pip-compile')\n            yield comment('# To update, run:')\n            yield comment('#')\n            custom_cmd = os.environ.get('CUSTOM_COMPILE_COMMAND')\n            if custom_cmd:\n                yield comment('#    {}'.format(custom_cmd))\n            else:\n                prog = os.path.basename(sys.argv[0])\n                args = ' '.join(get_os_args())\n                yield comment('#    {prog} {args}'.format(prog=prog, args=args))\n            yield comment('#')\n\n    def write_index_options(self):\n        if self.emit_index:\n            for index, index_url in enumerate(dedup(self.index_urls)):\n                if index_url.rstrip('/') == self.default_index_url:\n                    continue\n                flag = '--index-url' if index == 0 else '--extra-index-url'\n                yield '{} {}'.format(flag, index_url)\n\n    def write_trusted_hosts(self):\n        if self.emit_trusted_host:\n            for trusted_host in dedup(self.trusted_hosts):\n                yield '--trusted-host {}'.format(trusted_host)\n\n    def write_format_controls(self):\n        for nb in dedup(self.format_control.no_binary):\n            yield '--no-binary {}'.format(nb)\n        for ob in dedup(self.format_control.only_binary):\n            yield '--only-binary {}'.format(ob)\n\n    def write_flags(self):\n        emitted = False\n        for line in chain(self.write_index_options(),\n                          self.write_trusted_hosts(),\n                          self.write_format_controls()):\n            emitted = True\n            yield line\n        if emitted:\n            yield ''\n\n    def _iter_lines(self, results, unsafe_requirements, reverse_dependencies,\n                    primary_packages, markers, hashes):\n        for line in self.write_header():\n            yield line\n        for line in self.write_flags():\n            yield line\n\n        unsafe_requirements = {r for r in results if r.name in UNSAFE_PACKAGES} if not unsafe_requirements else unsafe_requirements  # noqa\n        packages = {r for r in results if r.name not in UNSAFE_PACKAGES}\n\n        packages = sorted(packages, key=self._sort_key)\n\n        for ireq in packages:\n            line = self._format_requirement(\n                ireq, reverse_dependencies, primary_packages,\n                markers.get(key_from_req(ireq.req)), hashes=hashes)\n            yield line\n\n        if unsafe_requirements:\n            unsafe_requirements = sorted(unsafe_requirements, key=self._sort_key)\n            yield ''\n            yield comment('# The following packages are considered to be unsafe in a requirements file:')\n\n            for ireq in unsafe_requirements:\n                req = self._format_requirement(ireq,\n                                               reverse_dependencies,\n                                               primary_packages,\n                                               marker=markers.get(key_from_req(ireq.req)),\n                                               hashes=hashes)\n                if not self.allow_unsafe:\n                    yield comment('# {}'.format(req))\n                else:\n                    yield req\n\n    def write(self, results, unsafe_requirements, reverse_dependencies,\n              primary_packages, markers, hashes):\n        with ExitStack() as stack:\n            f = None\n            if not self.dry_run:\n                f = stack.enter_context(AtomicSaver(self.dst_file))\n\n            for line in self._iter_lines(results, unsafe_requirements, reverse_dependencies,\n                                         primary_packages, markers, hashes):\n                log.info(line)\n                if f:\n                    f.write(unstyle(line).encode('utf-8'))\n                    f.write(os.linesep.encode('utf-8'))\n\n    def _format_requirement(self, ireq, reverse_dependencies, primary_packages, marker=None, hashes=None):\n        ireq_hashes = (hashes if hashes is not None else {}).get(ireq)\n\n        line = format_requirement(ireq, marker=marker, hashes=ireq_hashes)\n\n        if not self.annotate or key_from_req(ireq.req) in primary_packages:\n            return line\n\n        # Annotate what packages this package is required by\n        required_by = reverse_dependencies.get(ireq.name.lower(), [])\n        if required_by:\n            annotation = \", \".join(sorted(required_by))\n            line = \"{:24}{}{}\".format(\n                line,\n                \" \\\\\\n    \" if ireq_hashes else \"  \",\n                comment(\"# via \" + annotation))\n        return line\n", "path": "piptools/writer.py"}]}