跨语言项目环境变量管理：GVM模式的通用实践

#!/bin/bash
export MY_PROJECT_VAR="This is my project specific value"
export DATABASE_URL="postgres://user:pass@host:port/db"
echo "Activated myproject environment."

#!/bin/bash
unset MY_PROJECT_VAR
unset DATABASE_URL
echo "Deactivated myproject environment."

# 存储当前激活的项目名称，用于deactivate
_active_project_name=""

# 通用的项目激活函数
function workon() {
    if [ -z "$1" ]; then
        echo "Usage: workon <project_name> [go_version]"
        return 1
    fi

    local project_name=$1
    local go_version=${2:-go1.21} # 默认Go版本，可根据项目指定

    # 检查项目目录是否存在
    local project_path="$HOME/Projects/$project_name" # 假设所有项目都在此目录下
    if [ ! -d "$project_path" ]; then
        echo "Error: Project directory '$project_path' not found."
        return 1
    fi

    # 检查并执行项目的去激活脚本（如果当前有项目激活）
    if [ -n "$_active_project_name" ]; then
        echo "Deactivating previous project: $_active_project_name"
        deactivate
    fi

    # 切换Go版本 (GVM部分)
    echo "Switching Go version to $go_version..."
    gvm use "$go_version" || { echo "Failed to switch Go version to $go_version"; return 1; }

    # 激活项目特定的环境变量
    local setup_script="$project_path/env_setup.sh"
    if [ -f "$setup_script" ]; then
        echo "Sourcing project setup script: $setup_script"
        source "$setup_script"
    else
        echo "Warning: No env_setup.sh found for $project_name at $setup_script"
    fi

    _active_project_name="$project_name"
    export PROJECT_ROOT="$project_path" # 设置一个通用的项目根目录变量
    echo "Successfully activated project: $project_name (Go $go_version)"
}

# 通用的项目去激活函数
function deactivate() {
    if [ -z "$_active_project_name" ]; then
        echo "No project currently active."
        return 0
    fi

    local project_path="$HOME/Projects/$_active_project_name"
    local teardown_script="$project_path/env_teardown.sh"

    # 执行项目的去激活脚本
    if [ -f "$teardown_script" ]; then
        echo "Sourcing project teardown script: $teardown_script"
        source "$teardown_script"
    else
        echo "Warning: No env_teardown.sh found for $_active_project_name at $teardown_script"
    fi

    # 清除通用的项目根目录变量
    unset PROJECT_ROOT

    # 可以选择切换回默认的Go版本或系统Go版本
    # gvm use system # 切换回系统Go版本
    # gvm use go1.21 --default # 切换回某个默认Go版本

    echo "Deactivated project: $_active_project_name"
    _active_project_name=""
}

# 激活 myproject 项目，并使用 Go 1.20
workon myproject go1.20

# 此时，MY_PROJECT_VAR 和 DATABASE_URL 环境变量已被设置
echo $MY_PROJECT_VAR
echo $DATABASE_URL
echo $PROJECT_ROOT

# 进行项目开发...

# 去激活当前项目
deactivate

# 此时，MY_PROJECT_VAR 和 DATABASE_URL 环境变量已被清除
echo $MY_PROJECT_VAR
echo $DATABASE_URL