使用 pip 安装新包时 zsh 文件存在错误

Question

我在 mac，并在终端上用 prezto 设置了 zsh。我有一个使用 virtualenv 包装器的 python 项目。一切正常，但是当我使用 pip 安装新包并想将其冻结在现有的 requirements.txt 文件中时，zsh 说：

zsh: file exists: requirements

我运行的命令是：pip freeze > requirements.txt 我的zshrc文件如下：

if [[ -s "${ZDOTDIR:-$HOME}/.zprezto/init.zsh" ]]; then
  source "${ZDOTDIR:-$HOME}/.zprezto/init.zsh"
fi

# Customize to your needs...
export PATH=$PATH:$HOME/bin


ZSH_THEME="steeef"

plugins=(git django colored-man themes colorize github jira vagrant virtualenvwrapper pip python brew osx zsh-syntax-highlighting history-substring-search)

# export WORKON_HOME=$HOME/.virtuale    nvs
# source /usr/local/bin/virtualenvwrapper.sh

export PATH=$PATH:/usr/local/mysql/bin

export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
export WORKON_HOME=$HOME/.virtualenvs
PATH=$PATH:~/bin
export PATH
# source ~/.bash_profile
# export M2_HOME=~/maven-3.3.9
# export M2=$M2_HOME/bin
export PATH=$M2:$PATH
export JAVA_HOME=
source /usr/local/bin/virtualenvwrapper.sh
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

export PATH=$PATH:/Applications/Postgres.app/Contents/Versions/9.6/bin
export PATH="/usr/local/opt/coreutils/libexec/gnubin:$PATH"

我可以知道这里可能出了什么问题吗？

谢谢

Answer 1

这可能是因为您在 zsh shell

中的 CLOBBER 选项

CLOBBER (+C, ksh: +C) <D>
Allows ‘>’ redirection to truncate existing files. Otherwise ‘>!’ or ‘>|’ must be used to
truncate a file.

If the option is not set, and the option APPEND_CREATE is also not set, ‘>>!’ or ‘>>|’ must be used to create a file. If either option is set, ‘>>’ may be used.

所以只需在您的 .zshrc 中添加一行即可使它在您的所有会话中生效。

setopt clobber

（或）在 re-direction 上进行破坏以作为 pip freeze >! requirements.txt

>! word
Same as >, except that the file is truncated to zero length if it exists, even if 
CLOBBER is unset.

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