From 50c46b1b6e2e0c08ef3988a405406ab0a72c4d17 Mon Sep 17 00:00:00 2001
From: Ian Fijolek <ian@iamthefij.com>
Date: Tue, 1 Dec 2020 20:27:50 -0800
Subject: [PATCH] Add slog and less verbose logging by default

---
 go.mod  |  1 +
 go.sum  |  2 ++
 main.go | 21 ++++++++++++---------
 3 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/go.mod b/go.mod
index 70cd15a..5491c42 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/iamthefij/tag-notifier
 go 1.15
 
 require (
+	git.iamthefij.com/iamthefij/slog v0.0.0-20201202020306-f6ae8b7d5a96
 	github.com/containerd/containerd v1.4.3 // indirect
 	github.com/docker/distribution v2.7.1+incompatible // indirect
 	github.com/docker/docker v17.12.0-ce-rc1.0.20200916142827-bd33bbf0497b+incompatible
diff --git a/go.sum b/go.sum
index 05a8a23..a6a4f29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+git.iamthefij.com/iamthefij/slog v0.0.0-20201202020306-f6ae8b7d5a96 h1:uIr3Bz44Unzft7f2mUsYiF/wFB4lrCl82GUFfIlZCd4=
+git.iamthefij.com/iamthefij/slog v0.0.0-20201202020306-f6ae8b7d5a96/go.mod h1:1RUj4hcCompZkAxXCRfUX786tb3cM/Zpkn97dGfUfbg=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Microsoft/go-winio v0.4.15 h1:qkLXKzb1QoVatRyd/YlXZ/Kg0m5K3SPuoD82jjSOaBc=
 github.com/Microsoft/go-winio v0.4.15/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
diff --git a/main.go b/main.go
index b07b88e..f599d3b 100644
--- a/main.go
+++ b/main.go
@@ -12,6 +12,7 @@ import (
 	"strconv"
 	"strings"
 
+	"git.iamthefij.com/iamthefij/slog"
 	dockerTypes "github.com/docker/docker/api/types"
 	dockerClient "github.com/docker/docker/client"
 )
@@ -184,9 +185,10 @@ func getNewerTags(current ImageTag) ([]ImageTag, error) {
 }
 
 func main() {
-	flag.StringVar(&registryBaseURL, "registry-url", registryBaseURL, "base url of the registry you want to check against")
+	flag.StringVar(&defaultRegistryBaseURL, "registry-url", defaultRegistryBaseURL, "base url of the registry you want to check against")
 	flag.IntVar(&maxPages, "max-pages", maxPages, "max number of pages to retrieve from registry")
 	var showVersion = flag.Bool("version", false, "display the version and exit")
+	flag.BoolVar(&slog.DebugLevel, "debug", false, "show debug logs")
 	flag.Parse()
 
 	// Print version if asked
@@ -212,23 +214,24 @@ func main() {
 		images[container.Image] = true
 	}
 	for image := range images {
-		fmt.Printf("[%s] Checking for updates...\n", image)
+		slog.Debug("[%s] Checking for updates...", image)
 		it, err := ParseImageTag(image)
 		if err != nil {
-			fmt.Printf("[%s] Can't parse tag: %v\n", image, err)
+			slog.Debug("[%s] Can't parse tag: %v", image, err)
 			continue
 		}
 		newerTags, err := getNewerTags(it)
-		if err != nil {
-			fmt.Printf("[%s] Panic getting new tags: %v\n", image, err)
-			panic(err)
-		}
+		slog.PanicOnErr(err, "[%s] failed getting new tags", image)
 		if len(newerTags) == 0 {
-			fmt.Printf("[%s] No newer versions found\n", image)
+			slog.Debug("[%s] No newer versions found", image)
 			continue
 		}
 		hasUpdate = true
-		fmt.Printf("[%s] Newer version found. Recommend update to %s\n", image, newerTags[0].ImageTag)
+		if slog.DebugLevel {
+			slog.Info("[%s] Newer version found! Recommended update to %s", image, newerTags[0].ImageTag)
+		} else {
+			fmt.Printf("[%s] Newer version found! Recommended update to %s\n", image, newerTags[0].ImageTag)
+		}
 	}
 
 	if hasUpdate {