minor CHORE warn when github secondary rate limit is reached and tell…

… about when it will continue (#12)

internal/github/client.go

@@ -23,7 +23,10 @@ func NewClient(ctx context.Context, ghToken string) (*Client, error) {
 	tc := oauth2.NewClient(ctx, ts)
 	// use a rate limiter to handle better the github api limit
 	// focuses on the secondary limit: https://github.com/google/go-github#rate-limiting
-	rateLimiter, err := github_ratelimit.NewRateLimitWaiterClient(tc.Transport)
+	rateLimiter, err := github_ratelimit.NewRateLimitWaiterClient(
+		tc.Transport,
+		github_ratelimit.WithLimitDetectedCallback(LogOnLimitDetected),
+	)
 	if err != nil {
 		return nil, err
 	}

internal/github/ratelimit.go

@@ -0,0 +1,11 @@
+package github
+
+import (
+	"gha-file-sync/internal/log"
+
+	"github.com/gofri/go-github-ratelimit/github_ratelimit"
+)
+
+func LogOnLimitDetected(ctx *github_ratelimit.CallbackContext) {
+	log.Warnf("secondary rate limit detected, will continue at %v", ctx.SleepUntil)
+}