prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Error about `--user` and `--target` flag when installing xbuildenv
  I sometimes get following error while installing xbuild environment:
  
  ```bash
  $ pyodide build .
  Downloading xbuild environment
  Installing xbuild environment
    stderr:
      ERROR: Can not combine '--user' and '--target'
  
      [notice] A new release of pip available: 22.3.1 -> 23.0
      [notice] To update, run: /home/gitpod/.pyenv/versions/3.10.2/bin/python -m pip install --upgrade pip
  ```
  
  It happens here, which installs host site packages:
  
  https://github.com/pyodide/pyodide/blob/7cc1058358242a5a9012edbb8163d86a860a1a28/pyodide-build/pyodide_build/install_xbuildenv.py#L50-L57
  
  I think we need to add `--no-user` flag explicitly to prevent this error.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `pyodide-build/pyodide_build/install_xbuildenv.py`
  Content:
  ```
  1 import argparse
  2 import json
  3 import shutil
  4 import subprocess
  5 from pathlib import Path
  6 from urllib.request import urlopen, urlretrieve
  7 
  8 from .common import exit_with_stdio, get_make_flag, get_pyodide_root
  9 from .create_pypa_index import create_pypa_index
  10 from .logger import logger
  11 
  12 
  13 def make_parser(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:
  14     parser.description = (
  15         "Install xbuild env.\n\n"
  16         "The installed environment is the same as the one that would result from\n"
  17         "`PYODIDE_PACKAGES='scipy' make` except that it is much faster.\n"
  18         "The goal is to enable out-of-tree builds for binary packages that depend\n"
  19         "on numpy or scipy.\n"
  20         "Note: this is a private endpoint that should not be used outside of the Pyodide Makefile."
  21     )
  22     parser.add_argument("--download", action="store_true", help="Download xbuild env")
  23     parser.add_argument("xbuildenv", type=str, nargs=1)
  24     return parser
  25 
  26 
  27 def download_xbuildenv(version: str, xbuildenv_path: Path) -> None:
  28     from shutil import rmtree, unpack_archive
  29     from tempfile import NamedTemporaryFile
  30 
  31     logger.info("Downloading xbuild environment")
  32     rmtree(xbuildenv_path, ignore_errors=True)
  33     with NamedTemporaryFile(suffix=".tar") as f:
  34         urlretrieve(
  35             f"https://github.com/pyodide/pyodide/releases/download/{version}/xbuildenv-{version}.tar.bz2",
  36             f.name,
  37         )
  38         unpack_archive(f.name, xbuildenv_path)
  39 
  40 
  41 def install_xbuildenv(version: str, xbuildenv_path: Path) -> None:
  42     logger.info("Installing xbuild environment")
  43     xbuildenv_path = xbuildenv_path / "xbuildenv"
  44     pyodide_root = get_pyodide_root()
  45     xbuildenv_root = xbuildenv_path / "pyodide-root"
  46     host_site_packages = xbuildenv_root / Path(
  47         get_make_flag("HOSTSITEPACKAGES")
  48     ).relative_to(pyodide_root)
  49     host_site_packages.mkdir(exist_ok=True, parents=True)
  50     result = subprocess.run(
  51         [
  52             "pip",
  53             "install",
  54             "-t",
  55             host_site_packages,
  56             "-r",
  57             xbuildenv_path / "requirements.txt",
  58         ],
  59         capture_output=True,
  60         encoding="utf8",
  61     )
  62     if result.returncode != 0:
  63         exit_with_stdio(result)
  64     # Copy the site-packages-extras (coming from the cross-build-files meta.yaml
  65     # key) over the site-packages directory with the newly installed packages.
  66     shutil.copytree(
  67         xbuildenv_path / "site-packages-extras", host_site_packages, dirs_exist_ok=True
  68     )
  69     cdn_base = f"https://cdn.jsdelivr.net/pyodide/v{version}/full/"
  70     if (xbuildenv_root / "repodata.json").exists():
  71         repodata_bytes = (xbuildenv_root / "repodata.json").read_bytes()
  72     else:
  73         repodata_url = cdn_base + "repodata.json"
  74         with urlopen(repodata_url) as response:
  75             repodata_bytes = response.read()
  76     repodata = json.loads(repodata_bytes)
  77     version = repodata["info"]["version"]
  78     create_pypa_index(repodata["packages"], xbuildenv_root, cdn_base)
  79 
  80 
  81 def main(args: argparse.Namespace) -> None:
  82     from . import __version__
  83 
  84     xbuildenv_path = Path(args.xbuildenv[0])
  85     version = __version__
  86     if args.download:
  87         download_xbuildenv(version, xbuildenv_path)
  88     install_xbuildenv(version, xbuildenv_path)
  89
  ```
  --- 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/pyodide-build/pyodide_build/install_xbuildenv.py b/pyodide-build/pyodide_build/install_xbuildenv.py
  --- a/pyodide-build/pyodide_build/install_xbuildenv.py
  +++ b/pyodide-build/pyodide_build/install_xbuildenv.py
  @@ -51,6 +51,7 @@
           [
               "pip",
               "install",
  +            "--no-user",
               "-t",
               host_site_packages,
               "-r",
  
verification_info: {"golden_diff": "diff --git a/pyodide-build/pyodide_build/install_xbuildenv.py b/pyodide-build/pyodide_build/install_xbuildenv.py\n--- a/pyodide-build/pyodide_build/install_xbuildenv.py\n+++ b/pyodide-build/pyodide_build/install_xbuildenv.py\n@@ -51,6 +51,7 @@\n         [\n             \"pip\",\n             \"install\",\n+            \"--no-user\",\n             \"-t\",\n             host_site_packages,\n             \"-r\",\n", "issue": "Error about `--user` and `--target` flag when installing xbuildenv\nI sometimes get following error while installing xbuild environment:\r\n\r\n```bash\r\n$ pyodide build .\r\nDownloading xbuild environment\r\nInstalling xbuild environment\r\n  stderr:\r\n    ERROR: Can not combine '--user' and '--target'\r\n\r\n    [notice] A new release of pip available: 22.3.1 -> 23.0\r\n    [notice] To update, run: /home/gitpod/.pyenv/versions/3.10.2/bin/python -m pip install --upgrade pip\r\n```\r\n\r\nIt happens here, which installs host site packages:\r\n\r\nhttps://github.com/pyodide/pyodide/blob/7cc1058358242a5a9012edbb8163d86a860a1a28/pyodide-build/pyodide_build/install_xbuildenv.py#L50-L57\r\n\r\nI think we need to add `--no-user` flag explicitly to prevent this error.\n", "before_files": [{"content": "import argparse\nimport json\nimport shutil\nimport subprocess\nfrom pathlib import Path\nfrom urllib.request import urlopen, urlretrieve\n\nfrom .common import exit_with_stdio, get_make_flag, get_pyodide_root\nfrom .create_pypa_index import create_pypa_index\nfrom .logger import logger\n\n\ndef make_parser(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:\n    parser.description = (\n        \"Install xbuild env.\\n\\n\"\n        \"The installed environment is the same as the one that would result from\\n\"\n        \"`PYODIDE_PACKAGES='scipy' make` except that it is much faster.\\n\"\n        \"The goal is to enable out-of-tree builds for binary packages that depend\\n\"\n        \"on numpy or scipy.\\n\"\n        \"Note: this is a private endpoint that should not be used outside of the Pyodide Makefile.\"\n    )\n    parser.add_argument(\"--download\", action=\"store_true\", help=\"Download xbuild env\")\n    parser.add_argument(\"xbuildenv\", type=str, nargs=1)\n    return parser\n\n\ndef download_xbuildenv(version: str, xbuildenv_path: Path) -> None:\n    from shutil import rmtree, unpack_archive\n    from tempfile import NamedTemporaryFile\n\n    logger.info(\"Downloading xbuild environment\")\n    rmtree(xbuildenv_path, ignore_errors=True)\n    with NamedTemporaryFile(suffix=\".tar\") as f:\n        urlretrieve(\n            f\"https://github.com/pyodide/pyodide/releases/download/{version}/xbuildenv-{version}.tar.bz2\",\n            f.name,\n        )\n        unpack_archive(f.name, xbuildenv_path)\n\n\ndef install_xbuildenv(version: str, xbuildenv_path: Path) -> None:\n    logger.info(\"Installing xbuild environment\")\n    xbuildenv_path = xbuildenv_path / \"xbuildenv\"\n    pyodide_root = get_pyodide_root()\n    xbuildenv_root = xbuildenv_path / \"pyodide-root\"\n    host_site_packages = xbuildenv_root / Path(\n        get_make_flag(\"HOSTSITEPACKAGES\")\n    ).relative_to(pyodide_root)\n    host_site_packages.mkdir(exist_ok=True, parents=True)\n    result = subprocess.run(\n        [\n            \"pip\",\n            \"install\",\n            \"-t\",\n            host_site_packages,\n            \"-r\",\n            xbuildenv_path / \"requirements.txt\",\n        ],\n        capture_output=True,\n        encoding=\"utf8\",\n    )\n    if result.returncode != 0:\n        exit_with_stdio(result)\n    # Copy the site-packages-extras (coming from the cross-build-files meta.yaml\n    # key) over the site-packages directory with the newly installed packages.\n    shutil.copytree(\n        xbuildenv_path / \"site-packages-extras\", host_site_packages, dirs_exist_ok=True\n    )\n    cdn_base = f\"https://cdn.jsdelivr.net/pyodide/v{version}/full/\"\n    if (xbuildenv_root / \"repodata.json\").exists():\n        repodata_bytes = (xbuildenv_root / \"repodata.json\").read_bytes()\n    else:\n        repodata_url = cdn_base + \"repodata.json\"\n        with urlopen(repodata_url) as response:\n            repodata_bytes = response.read()\n    repodata = json.loads(repodata_bytes)\n    version = repodata[\"info\"][\"version\"]\n    create_pypa_index(repodata[\"packages\"], xbuildenv_root, cdn_base)\n\n\ndef main(args: argparse.Namespace) -> None:\n    from . import __version__\n\n    xbuildenv_path = Path(args.xbuildenv[0])\n    version = __version__\n    if args.download:\n        download_xbuildenv(version, xbuildenv_path)\n    install_xbuildenv(version, xbuildenv_path)\n", "path": "pyodide-build/pyodide_build/install_xbuildenv.py"}], "after_files": [{"content": "import argparse\nimport json\nimport shutil\nimport subprocess\nfrom pathlib import Path\nfrom urllib.request import urlopen, urlretrieve\n\nfrom .common import exit_with_stdio, get_make_flag, get_pyodide_root\nfrom .create_pypa_index import create_pypa_index\nfrom .logger import logger\n\n\ndef make_parser(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:\n    parser.description = (\n        \"Install xbuild env.\\n\\n\"\n        \"The installed environment is the same as the one that would result from\\n\"\n        \"`PYODIDE_PACKAGES='scipy' make` except that it is much faster.\\n\"\n        \"The goal is to enable out-of-tree builds for binary packages that depend\\n\"\n        \"on numpy or scipy.\\n\"\n        \"Note: this is a private endpoint that should not be used outside of the Pyodide Makefile.\"\n    )\n    parser.add_argument(\"--download\", action=\"store_true\", help=\"Download xbuild env\")\n    parser.add_argument(\"xbuildenv\", type=str, nargs=1)\n    return parser\n\n\ndef download_xbuildenv(version: str, xbuildenv_path: Path) -> None:\n    from shutil import rmtree, unpack_archive\n    from tempfile import NamedTemporaryFile\n\n    logger.info(\"Downloading xbuild environment\")\n    rmtree(xbuildenv_path, ignore_errors=True)\n    with NamedTemporaryFile(suffix=\".tar\") as f:\n        urlretrieve(\n            f\"https://github.com/pyodide/pyodide/releases/download/{version}/xbuildenv-{version}.tar.bz2\",\n            f.name,\n        )\n        unpack_archive(f.name, xbuildenv_path)\n\n\ndef install_xbuildenv(version: str, xbuildenv_path: Path) -> None:\n    logger.info(\"Installing xbuild environment\")\n    xbuildenv_path = xbuildenv_path / \"xbuildenv\"\n    pyodide_root = get_pyodide_root()\n    xbuildenv_root = xbuildenv_path / \"pyodide-root\"\n    host_site_packages = xbuildenv_root / Path(\n        get_make_flag(\"HOSTSITEPACKAGES\")\n    ).relative_to(pyodide_root)\n    host_site_packages.mkdir(exist_ok=True, parents=True)\n    result = subprocess.run(\n        [\n            \"pip\",\n            \"install\",\n            \"--no-user\",\n            \"-t\",\n            host_site_packages,\n            \"-r\",\n            xbuildenv_path / \"requirements.txt\",\n        ],\n        capture_output=True,\n        encoding=\"utf8\",\n    )\n    if result.returncode != 0:\n        exit_with_stdio(result)\n    # Copy the site-packages-extras (coming from the cross-build-files meta.yaml\n    # key) over the site-packages directory with the newly installed packages.\n    shutil.copytree(\n        xbuildenv_path / \"site-packages-extras\", host_site_packages, dirs_exist_ok=True\n    )\n    cdn_base = f\"https://cdn.jsdelivr.net/pyodide/v{version}/full/\"\n    if (xbuildenv_root / \"repodata.json\").exists():\n        repodata_bytes = (xbuildenv_root / \"repodata.json\").read_bytes()\n    else:\n        repodata_url = cdn_base + \"repodata.json\"\n        with urlopen(repodata_url) as response:\n            repodata_bytes = response.read()\n    repodata = json.loads(repodata_bytes)\n    version = repodata[\"info\"][\"version\"]\n    create_pypa_index(repodata[\"packages\"], xbuildenv_root, cdn_base)\n\n\ndef main(args: argparse.Namespace) -> None:\n    from . import __version__\n\n    xbuildenv_path = Path(args.xbuildenv[0])\n    version = __version__\n    if args.download:\n        download_xbuildenv(version, xbuildenv_path)\n    install_xbuildenv(version, xbuildenv_path)\n", "path": "pyodide-build/pyodide_build/install_xbuildenv.py"}]}