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https://github.com/thegeeklab/github-releases-notifier.git
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Add all Go source files
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80
main.go
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80
main.go
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package main
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import (
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"context"
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"os"
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"strings"
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"time"
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"github.com/alexflint/go-arg"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/joho/godotenv"
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"github.com/shurcooL/githubql"
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"golang.org/x/oauth2"
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)
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// Config of env and args
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type Config struct {
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GithubToken string `arg:"env:GITHUB_TOKEN"`
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Interval time.Duration `arg:"env:INTERVAL"`
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LogLevel string `arg:"env:LOG_LEVEL"`
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Repositories []string `arg:"-r,separate"`
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SlackHook string `arg:"env:SLACK_HOOK"`
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}
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// Token returns an oauth2 token or an error.
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func (c Config) Token() *oauth2.Token {
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return &oauth2.Token{AccessToken: c.GithubToken}
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}
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func main() {
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_ = godotenv.Load()
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c := Config{
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Interval: time.Hour,
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LogLevel: "info",
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}
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arg.MustParse(&c)
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logger := log.NewJSONLogger(log.NewSyncWriter(os.Stdout))
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logger = log.With(logger,
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"ts", log.DefaultTimestampUTC,
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"caller", log.Caller(5),
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)
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level.SetKey("severity")
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switch strings.ToLower(c.LogLevel) {
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case "debug":
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logger = level.NewFilter(logger, level.AllowDebug())
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case "warn":
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logger = level.NewFilter(logger, level.AllowWarn())
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case "error":
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logger = level.NewFilter(logger, level.AllowError())
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default:
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logger = level.NewFilter(logger, level.AllowInfo())
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}
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tokenSource := oauth2.StaticTokenSource(c.Token())
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client := oauth2.NewClient(context.Background(), tokenSource)
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checker := &Checker{
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logger: logger,
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client: githubql.NewClient(client),
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}
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releases := make(chan Repository)
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go checker.Run(c.Interval, c.Repositories, releases)
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slack := SlackSender{Hook: c.SlackHook}
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level.Info(logger).Log("msg", "waiting for new releases")
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for repository := range releases {
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if err := slack.Send(repository); err != nil {
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level.Warn(logger).Log(
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"msg", "failed to send release to messenger",
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"err", err,
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)
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continue
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}
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}
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}
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15
release.go
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15
release.go
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package main
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import (
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"net/url"
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"time"
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)
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// Release of a repository tagged via GitHub.
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type Release struct {
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ID string
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Name string
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Description string
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URL url.URL
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PublishedAt time.Time
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}
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135
releasechecker.go
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135
releasechecker.go
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package main
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/shurcooL/githubql"
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)
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// Checker has a githubql client to run queries and also knows about
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// the current repositories releases to compare against.
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type Checker struct {
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logger log.Logger
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client *githubql.Client
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releases map[string]Repository
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}
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// Run the queries and comparisons for the given repositories in a given interval.
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func (c *Checker) Run(interval time.Duration, repositories []string, releases chan<- Repository) {
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if c.releases == nil {
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c.releases = make(map[string]Repository)
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}
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for {
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for _, repoName := range repositories {
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s := strings.Split(repoName, "/")
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owner, name := s[0], s[1]
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nextRepo, err := c.query(owner, name)
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if err != nil {
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level.Warn(c.logger).Log(
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"msg", "failed to query the repository's releases",
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"owner", owner,
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"name", name,
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"err", err,
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)
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continue
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}
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// For debugging uncomment this next line
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//releases <- nextRepo
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currRepo, ok := c.releases[repoName]
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// We've queried the repository for the first time.
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// Saving the current state to compare with the next iteration.
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if !ok {
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c.releases[repoName] = nextRepo
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continue
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}
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if nextRepo.Release.PublishedAt.After(currRepo.Release.PublishedAt) {
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releases <- nextRepo
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c.releases[repoName] = nextRepo
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} else {
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level.Debug(c.logger).Log(
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"msg", "no new release for repository",
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"owner", owner,
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"name", name,
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)
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}
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}
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time.Sleep(interval)
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}
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}
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// This should be improved in the future to make batch requests for all watched repositories at once
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// TODO: https://github.com/shurcooL/githubql/issues/17
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func (c *Checker) query(owner, name string) (Repository, error) {
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var query struct {
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Repository struct {
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ID githubql.ID
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Name githubql.String
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Description githubql.String
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URL githubql.URI
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Releases struct {
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Edges []struct {
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Node struct {
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ID githubql.ID
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Name githubql.String
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Description githubql.String
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URL githubql.URI
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PublishedAt githubql.DateTime
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}
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}
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} `graphql:"releases(last: 1)"`
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} `graphql:"repository(owner: $owner, name: $name)"`
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}
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variables := map[string]interface{}{
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"owner": githubql.String(owner),
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"name": githubql.String(name),
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}
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if err := c.client.Query(context.Background(), &query, variables); err != nil {
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return Repository{}, err
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}
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repositoryID, ok := query.Repository.ID.(string)
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if !ok {
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return Repository{}, fmt.Errorf("can't convert repository id to string: %v", query.Repository.ID)
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}
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if len(query.Repository.Releases.Edges) == 0 {
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return Repository{}, fmt.Errorf("can't find any releases for %s/%s", owner, name)
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}
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latestRelease := query.Repository.Releases.Edges[0].Node
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releaseID, ok := latestRelease.ID.(string)
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if !ok {
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return Repository{}, fmt.Errorf("can't convert release id to string: %v", query.Repository.ID)
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}
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return Repository{
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ID: repositoryID,
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Name: string(query.Repository.Name),
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Owner: owner,
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Description: string(query.Repository.Description),
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URL: *query.Repository.URL.URL,
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Release: Release{
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ID: releaseID,
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Name: string(latestRelease.Name),
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Description: string(latestRelease.Description),
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URL: *latestRelease.URL.URL,
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PublishedAt: latestRelease.PublishedAt.Time,
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},
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}, nil
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}
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13
repository.go
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13
repository.go
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package main
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import "net/url"
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// Repository on GitHub.
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type Repository struct {
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ID string
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Name string
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Owner string
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Description string
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URL url.URL
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Release Release
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}
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62
slack.go
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62
slack.go
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package main
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"time"
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)
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type SlackSender struct {
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Hook string
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}
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type slackPayload struct {
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Username string `json:"username"`
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IconEmoji string `json:"icon_emoji"`
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Text string `json:"text"`
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}
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func (s *SlackSender) Send(repository Repository) error {
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payload := slackPayload{
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Username: "GitHub Releases",
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IconEmoji: ":github:",
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Text: fmt.Sprintf(
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"<%s|%s/%s>: <%s|%s> released",
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repository.URL.String(),
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repository.Owner,
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repository.Name,
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repository.Release.URL.String(),
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repository.Release.Name,
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),
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}
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payloadData, err := json.Marshal(payload)
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if err != nil {
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return err
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}
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req, err := http.NewRequest(http.MethodPost, s.Hook, bytes.NewReader(payloadData))
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Millisecond)
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defer cancel()
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req.WithContext(ctx)
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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body, _ := ioutil.ReadAll(resp.Body)
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return fmt.Errorf("request didn't respond with 200 OK: %s, %s", resp.Status, body)
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}
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return nil
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}
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