Mac系统下Fish Shell无法运行nvm的解决方法咨询

问题 #

通过Brew安装Fish Shell后，按照指引将以下bash代码添加到~/.config/fish/config.fish和~/.zprofile中：

export NVM_DIR="$HOME/.nvm"
[ -s "/opt/homebrew/opt/nvm/nvm.sh" ] && \. "/opt/homebrew/opt/nvm/nvm.sh"  # This loads nvm
[ -s "/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm" ] && \. "/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm"  # This loads nvm bash_completion

在普通终端（bash/zsh）中nvm可正常运行，但在Fish Shell中提示fish: Unknown command: nvm，执行source ~/.config/fish/config.fish时出现以下错误：

/opt/homebrew/Cellar/nvm/0.39.3/libexec/nvm.sh (line 386): Unexpected ')' found, expecting '}'
    *[!/]*/)
           ^
from sourcing file /opt/homebrew/Cellar/nvm/0.39.3/libexec/nvm.sh
    called on line 3 of file /opt/homebrew/opt/nvm/nvm.sh
from sourcing file /opt/homebrew/opt/nvm/nvm.sh
    called on line 6 of file ~/.config/fish/config.fish
from sourcing file ~/.config/fish/config.fish
.: Error while reading file '/opt/homebrew/Cellar/nvm/0.39.3/libexec/nvm.sh'
/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm (line 5): Missing end to balance this if statement
if ! command -v nvm &> /dev/null; then
^^
from sourcing file /opt/homebrew/opt/nvm/etc/bash_completion.d/nvm
    called on line 7 of file ~/.config/fish/config.fish
from sourcing file ~/.config/fish/config.fish
.: Error while reading file '/opt/homebrew/opt/nvm/etc/bash_completion.d/nvm'

需要解决如何在Fish Shell中正常运行nvm的问题。

解决方案 #

错误原因 #

nvm的启动脚本nvm.sh和补全脚本是Bash专属语法，Fish Shell的语法规则与Bash不兼容，直接source这些脚本会触发语法错误，导致nvm无法加载。

方法一：使用bass工具兼容Bash脚本 #

bass是一个Fish工具，能在Fish环境中运行Bash脚本并同步环境变量：

1. 先安装bass：

brew install bass

2. 删除~/.config/fish/config.fish中之前添加的三行Bash代码，替换为：

set -x NVM_DIR "$HOME/.nvm"
bass source /opt/homebrew/opt/nvm/nvm.sh --no-use

3. 重启Fish Shell，即可正常使用nvm命令。

方法二：安装Fish专用的nvm插件 #

使用Fish包管理器安装专为Fish适配的nvm插件，无需依赖Bash脚本：

1. 若未安装Fish包管理器fisher，通过Brew安装：

brew install fisher

2. 安装nvm插件：

fisher install jorgebucaran/nvm.fish

3. 重启Fish Shell后，直接使用nvm命令即可，无需额外配置。

内容的提问来源于stack exchange，提问作者Pikk