git_fetch.go

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"net/http"
	"os"
)

var token = flag.String("token", os.Getenv("GITHUB_TOKEN"), "Github Token (see: https://github.com/settings/tokens)")
var slug = flag.String("slug", "", "Github Repo Slug (ex: bign8/games)")
var file = flag.String("file", "", "File to fetch")

func main() {
	flag.Parse()
	if *slug == "" {
		fmt.Println("no repo slug provided")
	}
	if *file == "" {
		fmt.Println("no file provided")
	}
	if *slug == "" || *file == "" {
		flag.Usage()
		os.Exit(1)
	}
	client := &http.Client{}
	req, err := http.NewRequest("GET", "https://api.github.com/repos/"+*slug+"/contents/"+*file, nil)
	if err != nil {
		panic(err)
	}
	req.Header.Add("Authorization", "token "+*token)
	res, err := client.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	obj := struct {
		Content []byte `json:"content"`
	}{}
	if err = json.NewDecoder(res.Body).Decode(&obj); err != nil {
		panic(err)
	}
	fmt.Println(string(obj.Content))
}