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这个问题发生在激活 idf 环境的时候，环境正常激活了，但也报出了这一串异常。
$ get_idf
Setting IDF_PATH to '/opt/esp-idf'
Detecting the Python interpreter
Checking "python" ...
Python 3.9.7
"python" has been detected
Adding ESP-IDF tools to PATH...
Using Python interpreter in /home/kearney/.espressif/python_env/idf4.3_py3.9_env/bin/python
Checking if Python packages are up to date...
Python requirements from /opt/esp-idf/requirements.txt are satisfied.
Added the following directories to PATH:
/opt/esp-idf/components/esptool_py/esptool
/opt/esp-idf/components/espcoredump
/opt/esp-idf/components/partition_table
/opt/esp-idf/components/app_update
/home/kearney/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/bin
/home/kearney/.espressif/tools/xtensa-esp32s2-elf/esp-2020r3-8.4.0/xtensa-esp32s2-elf/bin
/home/kearney/.espressif/tools/xtensa-esp32s3-elf/esp-2020r3-8.4.0/xtensa-esp32s3-elf/bin
/home/kearney/.espressif/tools/riscv32-esp-elf/1.24.0.123_64eb9ff-8.4.0/riscv32-esp-elf/bin
/home/kearney/.espressif/tools/esp32ulp-elf/2.28.51-esp-20191205/esp32ulp-elf-binutils/bin
/home/kearney/.espressif/tools/esp32s2ulp-elf/2.28.51-esp-20191205/esp32s2ulp-elf-binutils/bin
/home/kearney/.espressif/tools/openocd-esp32/v0.10.0-esp32-20210401/openocd-esp32/bin
/home/kearney/.espressif/python_env/idf4.3_py3.9_env/bin
/opt/esp-idf/tools
Done! You can now compile ESP-IDF projects.
Go to the project directory and run:
idf.py build
Traceback (most recent call last):
File "/opt/esp-idf/tools/idf.py", line 812, in <module>
main()
File "/opt/esp-idf/tools/idf.py", line 730, in main
cli(sys.argv[1:], prog_name=PROG, complete_var='_IDF.PY_COMPLETE')
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/core.py", line 1137, in __call__
return self.main(*args, **kwargs)
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/core.py", line 1057, in main
self._main_shell_completion(extra, prog_name, complete_var)
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/core.py", line 1132, in _main_shell_completion
rv = shell_complete(self, ctx_args, prog_name, complete_var, instruction)
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/shell_completion.py", line 45, in shell_complete
echo(comp.source())
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/shell_completion.py", line 324, in source
self._check_version()
File "/home/kearney/.espressif/python_env/idf4.3_py3.9_env/lib/python3.9/site-packages/click/shell_completion.py", line 319, in _check_version
raise RuntimeError(
RuntimeError: Couldn't detect Bash version, shell completion is not supported.
【问题解决】RuntimeError: Couldn‘t detect Bash version, shell completion is not supported… 麟枫 2021-08-06 给出了一种临时解决办法： 修改shell_completion.py 里305行那的两行代码
output = subprocess.run(["bash", "-c", "echo $BASH_VERSION"], stdout=subprocess.PIPE)
match = re.search(r"(\d)\.(\d)\.\d", output.stdout.decode())
原来的代码（shell_completion.py L302-L321）是这样的
def _check_version(self) -> None:
import subprocess
output = subprocess.run(["bash", "--version"], stdout=subprocess.PIPE)
match = re.search(r"version (\d)\.(\d)\.\d", output.stdout.decode())
if match is not None:
major, minor = match.groups()
if major < "4" or major == "4" and minor < "4":
raise RuntimeError(
_(
"Shell completion is not supported for Bash"
" versions older than 4.4."
)
)
else:
raise RuntimeError(
_("Couldn't detect Bash version, shell completion is not supported.")
)
可以从源码中看出这个问题抛出异常是因为没有检测到 bash 的版本号，然而我已经安装了最新版的 bash，而且通过 L305 行的 bash --version 是可以获取到版本号的，再看一下代码抛出异常的原因是 match 为 None,也就是说 L306 没有检测到 bash 的版本号，为什么呢？？通过下面的输出对比一下就知道了，它的版本号校验是通过检测 version 后面的数字，然而我使用的是中文环境，所以它一定不会检测到版本。
$ bash --version
GNU bash，版本 5.1.8(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2020 Free Software Foundation, Inc.
许可证 GPLv3+: GNU GPL 许可证第三版或者更新版本 <http://gnu.org/licenses/gpl.html>
本软件是自由软件，您可以自由地更改和重新发布。
在法律许可的情况下特此明示，本软件不提供任何担保。
那解决办法其实也比较简单，需要将这个语言环境变量设置为英文，短期方案是临时设置语言环境变量为英文 export LANG=en_US；中长期方案一是修改系统语言为英文，中长期方案二是把环境修改设置到启动命令中 alias get_idf='export LANG=en_US && . /opt/esp-idf/export.sh'，永久解决方案是反馈该问题到上游,主线已经合并解决方案，下一个稳定版发布即可永久解决该问题。
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