Golang实现基于关键词的文本过滤

要实现基于关键词（年份）的文本过滤，可以解析git输出，提取日期信息并进行比较。以下是修改后的代码：

package main

import (
	"fmt"
	"os/exec"
	"strconv"
	"strings"
	"time"
)

func filterBranchesByYear(output string, targetYear int) []string {
	var filtered []string
	lines := strings.Split(output, "\n")
	
	for _, line := range lines {
		if line == "" {
			continue
		}
		
		// 移除单引号并分割日期和分支名
		line = strings.Trim(line, "'")
		parts := strings.Split(line, "\t")
		if len(parts) < 2 {
			continue
		}
		
		// 解析日期字符串
		dateStr := parts[0]
		date, err := time.Parse("Mon Jan 2 15:04:05 2006 -0700", dateStr)
		if err != nil {
			// 尝试另一种格式（没有时区信息的情况）
			date, err = time.Parse("Mon Jan 2 15:04:05 2006", dateStr)
			if err != nil {
				continue
			}
		}
		
		// 检查年份是否早于目标年份
		if date.Year() < targetYear {
			filtered = append(filtered, line)
		}
	}
	
	return filtered
}

func branches() {
	out, err := exec.Command("git", "branch", "-a", "--sort=-committerdate", "--column", "--format='%(committerdate)%09%(refname:short)'").Output()

	if err != nil {
		fmt.Println("Couldn't find any branches in the repository")
		return
	}

	str1 := string(out)
	
	// 过滤早于2022年的分支
	filtered := filterBranchesByYear(str1, 2022)
	
	fmt.Println("Branches older than 2022:")
	for _, branch := range filtered {
		fmt.Println(branch)
	}
}

func main() {
	fmt.Printf("1. CHECK ALL BRANCHES: ")
	branches()
}

或者，如果你想要更通用的关键词过滤功能，这里有一个基于关键词列表的版本：

package main

import (
	"fmt"
	"os/exec"
	"strings"
)

func filterByKeywords(output string, keywords []string) []string {
	var filtered []string
	lines := strings.Split(output, "\n")
	
	for _, line := range lines {
		if line == "" {
			continue
		}
		
		// 检查是否包含任何关键词
		for _, keyword := range keywords {
			if strings.Contains(line, keyword) {
				filtered = append(filtered, line)
				break
			}
		}
	}
	
	return filtered
}

func branches() {
	out, err := exec.Command("git", "branch", "-a", "--sort=-committerdate", "--column", "--format='%(committerdate)%09%(refname:short)'").Output()

	if err != nil {
		fmt.Println("Couldn't find any branches in the repository")
		return
	}

	str1 := string(out)
	
	// 使用年份作为关键词过滤
	keywords := []string{"2021", "2020", "2019", "2018", "2017"}
	filtered := filterByKeywords(str1, keywords)
	
	fmt.Println("Branches with specified years:")
	for _, branch := range filtered {
		fmt.Println(branch)
	}
}

func main() {
	fmt.Printf("1. CHECK ALL BRANCHES: ")
	branches()
}

第一个版本使用时间解析进行精确的年份比较，第二个版本使用简单的字符串包含检查。根据你的具体需求选择合适的方法。