feat: 完成github代理核心功能

Author: gclm

.gitignore

@@ -1,11 +1,9 @@
-### Example user template template
-### Example user template
-
 # IntelliJ project files
 .idea
 *.iml
 out
 gen
+
 ### Go template
 # Binaries for programs and plugins
 *.exe

go.mod

@@ -0,0 +1,5 @@
+module gh
+
+go 1.17
+
+require github.com/creack/pty v1.1.17

go.sum

@@ -0,0 +1,2 @@
+github.com/creack/pty v1.1.17 h1:QeVUsEDNrLBW4tMgZHvxy18sKtr6VI492kBhUfhDJNI=
+github.com/creack/pty v1.1.17/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=

main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"fmt"
+	"github.com/creack/pty"
+	"io"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+)
+
+func isWindows() bool {
+	flag := runtime.GOOS == "windows"
+	return flag
+}
+
+func execCommand(cmd string) {
+	args := [2]string{
+		"bash", "-c",
+	}
+	if isWindows() {
+		args[0] = "cmd"
+		args[1] = "/C"
+	}
+	c := exec.Command(args[0], args[1], cmd)
+	f, err := pty.Start(c)
+	if err != nil {
+		panic(err)
+	}
+	_, err = io.Copy(os.Stdout, f)
+	if err != nil {
+		return
+	}
+}
+
+func githubProxy() {
+	var cmds = os.Args[1:]
+	for i := 1; i < len(cmds); i++ {
+		cmd := cmds[i]
+		if strings.Contains(cmd, "https://github.com") {
+			cmds[i] = strings.ReplaceAll(cmd, "https://github.com", "https://ghproxy.com/https://github.com")
+		}
+
+		if strings.Contains(cmd, "https://raw.githubusercontent.com") {
+			cmds[i] = strings.ReplaceAll(cmd, "https://raw.githubusercontent.com", "https://ghproxy.com/https://raw.githubusercontent.com")
+		}
+
+		if strings.Contains(cmd, "https://gist.github.com") {
+			cmds[i] = strings.ReplaceAll(cmd, "https://gist.github.com", "https://ghproxy.com/https://gist.github.com")
+		}
+	}
+
+	cmd := strings.Join(cmds, " ")
+	fmt.Printf("👉 : %v\n", cmd)
+	execCommand(cmd)
+}
+
+func main() {
+	githubProxy()
+}