跨语言项目环境变量管理：GVM的灵活应用与实践

bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)

# 例如，对于Bash用户
[[ -s "$HOME/.gvm/scripts/gvm" ]] && source "$HOME/.gvm/scripts/gvm"

source ~/.bashrc # 或 source ~/.zshrc

#!/bin/bash
export MY_CUSTOM_VAR="This is a project-specific value"
export ANOTHER_PATH="/opt/myproject/bin:$PATH"
echo "Project environment variables loaded."

#!/bin/bash
echo "Pre-activation script for myproject executed."
# 可以在这里执行一些项目启动前的检查或准备工作

#!/bin/bash
echo "Post-deactivation script for myproject executed."
# 可以在这里执行一些项目清理或收尾工作

# 存储当前激活的项目路径，用于 deactivate
_CURRENT_PROJECT_ENV=""
_ORIGINAL_PATH="$PATH" # 备份原始PATH

# workon 函数：激活项目环境
function workon() {
    local project_path="$1"
    local go_version="$2"

    if [ -z "$project_path" ]; then
        echo "Usage: workon <project_path> [go_version]"
        return 1
    fi

    if [ ! -d "$project_path" ]; then
        echo "Error: Project path '$project_path' does not exist."
        return 1
    fi

    # 切换到项目目录
    cd "$project_path" || return 1
    echo "Working on project: $(basename "$project_path")"

    # 设置Go版本 (如果指定)
    if [ -n "$go_version" ]; then
        gvm use "$go_version" || { echo "Error: Failed to use Go version '$go_version'."; return 1; }
        echo "Go version set to: $(go version)"
    else
        echo "No specific Go version provided. Using current GVM/system default."
    fi

    # 备份当前环境，以便 deactivate 时恢复
    _CURRENT_PROJECT_ENV=$(pwd)
    export _ORIGINAL_PATH="$PATH" # 每次workon都更新原始PATH备份，以防多次workon

    # 执行 preactivate 脚本
    if [ -f ".preactivate.sh" ]; then
        source ".preactivate.sh"
    fi

    # 加载项目环境变量
    if [ -f ".project_env.sh" ]; then
        source ".project_env.sh"
        echo "Project-specific environment variables loaded from .project_env.sh."
    fi
}

# deactivate 函数：停用项目环境
function deactivate() {
    if [ -z "$_CURRENT_PROJECT_ENV" ]; then
        echo "No project environment is currently active."
        return 1
    fi

    echo "Deactivating project environment for: $(basename "$_CURRENT_PROJECT_ENV")"

    # 执行 postdeactivate 脚本
    if [ -f "$_CURRENT_PROJECT_ENV/.postdeactivate.sh" ]; then
        source "$_CURRENT_PROJECT_ENV/.postdeactivate.sh"
    fi

    # 清理通过 .project_env.sh 设置的环境变量
    # 注意：这里需要手动反向操作，或者只unset那些明确知道的变量
    # 更健壮的方法是，在workon时记录所有变更，deactivate时回滚。
    # 为简化示例，我们只unset MY_CUSTOM_VAR和恢复PATH
    unset MY_CUSTOM_VAR
    export PATH="$_ORIGINAL_PATH" # 恢复原始PATH

    # 切换回系统默认Go版本或清除GVM设置 (可选，根据需求)
    # gvm use system # 如果你希望deactivate后总是回到系统Go
    # 或者只是清除当前GVM的PATH设置，让它回到未激活状态
    # GVM没有直接的“deactivate”功能，通常是切换到另一个版本或系统版本

    # 清除当前项目环境标记
    _CURRENT_PROJECT_ENV=""
    echo "Project environment deactivated."
}

source ~/.bashrc # 或 source ~/.zshrc