Conda in Windows under MSYS2 and Zsh 的问题解决

在Window11上使用git bash 安装zsh，并配置p10k主题，主要问题就是prompt中无法显示conda env；conda activate/deactivate 命令不能正常使用；

总结其实就是一个核心问题，\r,\n,\r\n的区别；

Errors likes these：

(eval):11: parse error near ^M

\r被解析成了^M，导致路径错误，如下：/c/Users/joaom/Miniconda3/Scripts/conda.exe^M

~
❯ conda activate base

~ [base]
❯ conda deactivate

__conda_activate:13: no such file or directory: /c/Users/joaom/Miniconda3/Scripts/conda.exe^M

或者，conda init 无效：

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
If using 'conda activate' from a batch script, change your
invocation to 'CALL conda.bat activate'.

To initialize your shell, run

    $ conda init <SHELL_NAME>

Currently supported shells are:
  - bash
  - cmd.exe
  - fish
  - tcsh
  - xonsh
  - zsh
  - powershell

See 'conda init --help' for more information and options.

IMPORTANT: You may need to close and restart your shell after running 'conda init'.

或者一些其他的报错，是关于window 和 unix编码的问题。

参考；

Conda in Windows under MSYS2 and Zsh line ending problems · Issue #9922 · conda/conda (github.com)

Conda activate UnicodeEncodeError if non-ascii characters present in bash prompt · Issue #7876 · conda/conda (github.com)

尝试过程：

1. >>> conda initialize >>>

   # !! Contents within this block are managed by 'conda init' !!
   #if [ -f '/d/Anaconda3/Scripts/conda.exe' ]; then
   #    eval "$('/d/Anaconda3/Scripts/conda.exe' 'shell.zsh' 'hook')"
   #fi
   
   # temp solution
   . /d/Anaconda3/etc/profile.d/conda.sh
   # <<< conda initialize <<<

2. 使用大佬分享的conda.sh文件；

   export CONDA_EXE=$(echo '/cygdrive/c/Users/karp/anaconda3/Scripts/conda.exe' | tr -d '\r')
   export _CE_M=''
   export _CE_CONDA=''
   export CONDA_PYTHON_EXE='C:\Users\karp\anaconda3\python.exe'
   
   # Copyright (C) 2012 Anaconda, Inc
   # SPDX-License-Identifier: BSD-3-Clause
   
   __add_sys_prefix_to_path() {
       # In dev-mode CONDA_EXE is python.exe and on Windows
       # it is in a different relative location to condabin.
       if [ -n "${_CE_CONDA}" ] && [ -n "${WINDIR+x}" ]; then
           SYSP=$(\dirname "${CONDA_EXE}")
           SYSP=$(echo ${SYSP} | tr -d '\r')
       else
           SYSP=$(\dirname "${CONDA_EXE}")
           SYSP=$(\dirname "${SYSP}")
           SYSP=$(echo ${SYSP} | tr -d '\r')
       fi
   if [ -n "${WINDIR+x}" ]; then
       PATH="${SYSP}/bin:${PATH}"
       PATH="${SYSP}/Scripts:${PATH}"
       PATH="${SYSP}/Library/bin:${PATH}"
       PATH="${SYSP}/Library/usr/bin:${PATH}"
       PATH="${SYSP}/Library/mingw-w64/bin:${PATH}"
       PATH="${SYSP}:${PATH}"
       PATH=$(echo ${PATH} | tr -d '\r')
   else
       PATH="${SYSP}/bin:${PATH}"
       PATH=$(echo ${PATH} | tr -d '\r')
   fi
   \export PATH
   }
   
   __conda_exe() (
       __add_sys_prefix_to_path
       $(echo "$CONDA_EXE" | tr -d '\r') $_CE_M $_CE_CONDA $(echo "$@" | tr -d '\r')
   )
   
   __conda_hashr() {
       if [ -n "${ZSH_VERSION:+x}" ]; then
           \rehash
       elif [ -n "${POSH_VERSION:+x}" ]; then
           :  # pass
       else
           \hash -r
       fi
   }
   
   __conda_activate() {
       if [ -n "${CONDA_PS1_BACKUP:+x}" ]; then
           # Handle transition from shell activated with conda <= 4.3 to a subsequent activation
           # after conda updated to >= 4.4. See issue #6173.
           PS1="$CONDA_PS1_BACKUP"
           PS1=$(echo ${PS1} | tr -d '\r')
           \unset CONDA_PS1_BACKUP
       fi
       \local ask_conda
       ask_conda="$(PS1="${PS1:-}" __conda_exe shell.posix "$@")" || \return
       ask_conda=$(echo ${ask_conda} | tr -d '\r')
       \eval "$ask_conda"
       __conda_hashr
   }
   
   __conda_reactivate() {
       \local ask_conda
       ask_conda="$(PS1="${PS1:-}" __conda_exe shell.posix reactivate)" || \return
       ask_conda=$(echo ${ask_conda} | tr -d '\r')
       \eval "$ask_conda"
       __conda_hashr
   }
   
   conda() {
       \local cmd="${1-__missing__}"
       case "$cmd" in
           activate|deactivate)
               __conda_activate $(echo "$@" | tr -d '\r')
               ;;
           install|update|upgrade|remove|uninstall)
               __conda_exe $(echo "$@" | tr -d '\r') || \return
               __conda_reactivate
               ;;
           *)
               __conda_exe $(echo "$@" | tr -d '\r')
               ;;
       esac
   }
   
   if [ -z "${CONDA_SHLVL+x}" ]; then
       \export CONDA_SHLVL=0
       # In dev-mode CONDA_EXE is python.exe and on Windows
       # it is in a different relative location to condabin.
       if [ -n "${_CE_CONDA:+x}" ] && [ -n "${WINDIR+x}" ]; then
           PATH="$(\dirname "$CONDA_EXE")/condabin${PATH:+":${PATH}"}"
       else
           PATH="$(\dirname "$(\dirname "$CONDA_EXE")")/condabin${PATH:+":${PATH}"}"
       fi
       \export PATH
   # We're not allowing PS1 to be unbound. It must at least be set.
   # However, we're not exporting it, which can cause problems when starting a second shell
   # via a first shell (i.e. starting zsh from bash).
   if [ -z "${PS1+x}" ]; then
       PS1=
   fi
   fi

目前仍然存在的问题是：

虽然conda activate/deactivate 命令不报错了，但是非base的虚拟环境并未完全激活；

如下，base env 正常，但其他的env 就不行；（注意*，表示当前激活环境）

❯ conda activate base
❯ conda env list
# conda environments:
#
base                  *  D:\Anaconda3
d2l                      D:\Anaconda3\envs\d2l

非base env 的情况：（并未激活；）

❯ conda activate d2l
❯ conda env list
# conda environments:
#
base                     D:\Anaconda3
d2l                      D:\Anaconda3\envs\d2l

后来又找到：https://github.com/conda/conda/issues/9922#issuecomment-1361695031

完美解决。

❯ conda activate d2l
❯ conda env list
# conda environments:
#
base                     D:\Anaconda3
d2l                   *  D:\Anaconda3\envs\d2l