main.go

package main

import (
	"archive/tar"
	"bytes"
	"compress/bzip2"
	"context"
	"encoding/json"
	"flag"
	"fmt"
	"io"
	"log"
	"net/http"
	"net/url"
	"regexp"
	"strings"
	"sync"
	"time"
)

var (
	flagBaseURL       string
	flagListen        string
	flagGitlabHost    string
	flagGitlabProject string
)

type GLAssetLink struct {
	ID      int64  `json:"id"`
	Name    string `json:"name"`
	TagName string `json:"tag_name"`
	URL     string `json:"url"`
}

type GLRelease struct {
	Name       string    `json:"name"`
	TagName    string    `json:"tag_name"`
	ReleasedAt time.Time `json:"released_at"`
	Assets     struct {
		Links []GLAssetLink `json:"links"`
	} `json:"assets"`
}

func getReleases(ctx context.Context) ([]GLRelease, error) {
	path := fmt.Sprintf("https://%s/api/v4/projects/%s/releases?order_by=created_at", flagGitlabHost, url.PathEscape(flagGitlabProject))
	req, err := http.NewRequestWithContext(ctx, "GET", path, nil)
	if err != nil {
		return nil, fmt.Errorf("when building request: %w", err)
	}
	res, err := http.DefaultTransport.RoundTrip(req)
	if err != nil {
		return nil, fmt.Errorf("when performing request: %w", err)
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		return nil, fmt.Errorf("invalid response code %d", res.StatusCode)
	}

	var releases []GLRelease
	j := json.NewDecoder(res.Body)
	err = j.Decode(&releases)
	if err != nil {
		return nil, fmt.Errorf("when performing request: %w", err)
	}
	return releases, nil
}

type req struct {
	getReleases chan []GLRelease