Suggestion: move default values to a more accessible place

[aqeelat]

Would it be a good idea to create an object called DefaultFlagValues and add the values below to it? It took me a while to figure out the default interval

argocd-image-updater/cmd/run.go

Lines 221 to 247 in 720f495

	runCmd.Flags().StringVar(&cfg.ApplicationsAPIKind, "applications-api", env.GetStringVal("APPLICATIONS_API", applicationsAPIKindK8S), "API kind that is used to manage Argo CD applications ('kubernetes' or 'argocd')")
	runCmd.Flags().StringVar(&cfg.ClientOpts.ServerAddr, "argocd-server-addr", env.GetStringVal("ARGOCD_SERVER", ""), "address of ArgoCD API server")
	runCmd.Flags().BoolVar(&cfg.ClientOpts.GRPCWeb, "argocd-grpc-web", env.GetBoolVal("ARGOCD_GRPC_WEB", false), "use grpc-web for connection to ArgoCD")
	runCmd.Flags().BoolVar(&cfg.ClientOpts.Insecure, "argocd-insecure", env.GetBoolVal("ARGOCD_INSECURE", false), "(INSECURE) ignore invalid TLS certs for ArgoCD server")
	runCmd.Flags().BoolVar(&cfg.ClientOpts.Plaintext, "argocd-plaintext", env.GetBoolVal("ARGOCD_PLAINTEXT", false), "(INSECURE) connect without TLS to ArgoCD server")
	runCmd.Flags().StringVar(&cfg.ClientOpts.AuthToken, "argocd-auth-token", "", "use token for authenticating to ArgoCD (unsafe - consider setting ARGOCD_TOKEN env var instead)")
	runCmd.Flags().BoolVar(&cfg.DryRun, "dry-run", false, "run in dry-run mode. If set to true, do not perform any changes")
	runCmd.Flags().DurationVar(&cfg.CheckInterval, "interval", 2*time.Minute, "interval for how often to check for updates")
	runCmd.Flags().StringVar(&cfg.LogLevel, "loglevel", env.GetStringVal("IMAGE_UPDATER_LOGLEVEL", "info"), "set the loglevel to one of trace|debug|info|warn|error")
	runCmd.Flags().StringVar(&kubeConfig, "kubeconfig", "", "full path to kubernetes client configuration, i.e. ~/.kube/config")
	runCmd.Flags().IntVar(&cfg.HealthPort, "health-port", 8080, "port to start the health server on, 0 to disable")
	runCmd.Flags().IntVar(&cfg.MetricsPort, "metrics-port", 8081, "port to start the metrics server on, 0 to disable")
	runCmd.Flags().BoolVar(&once, "once", false, "run only once, same as specifying --interval=0 and --health-port=0")
	runCmd.Flags().StringVar(&cfg.RegistriesConf, "registries-conf-path", defaultRegistriesConfPath, "path to registries configuration file")
	runCmd.Flags().BoolVar(&disableKubernetes, "disable-kubernetes", false, "do not create and use a Kubernetes client")
	runCmd.Flags().IntVar(&cfg.MaxConcurrency, "max-concurrency", 10, "maximum number of update threads to run concurrently")
	runCmd.Flags().StringVar(&cfg.ArgocdNamespace, "argocd-namespace", "", "namespace where ArgoCD runs in (current namespace by default)")
	runCmd.Flags().StringSliceVar(&cfg.AppNamePatterns, "match-application-name", nil, "patterns to match application name against")
	runCmd.Flags().StringVar(&cfg.AppLabel, "match-application-label", "", "label selector to match application labels against")
	runCmd.Flags().BoolVar(&warmUpCache, "warmup-cache", true, "whether to perform a cache warm-up on startup")
	runCmd.Flags().StringVar(&cfg.GitCommitUser, "git-commit-user", env.GetStringVal("GIT_COMMIT_USER", "argocd-image-updater"), "Username to use for Git commits")
	runCmd.Flags().StringVar(&cfg.GitCommitMail, "git-commit-email", env.GetStringVal("GIT_COMMIT_EMAIL", "[email protected]"), "E-Mail address to use for Git commits")
	runCmd.Flags().StringVar(&cfg.GitCommitSigningKey, "git-commit-signing-key", env.GetStringVal("GIT_COMMIT_SIGNING_KEY", ""), "GnuPG key ID or path to Private SSH Key used to sign the commits")
	runCmd.Flags().StringVar(&cfg.GitCommitSigningMethod, "git-commit-signing-method", env.GetStringVal("GIT_COMMIT_SIGNING_METHOD", "openpgp"), "Method used to sign Git commits ('openpgp' or 'ssh')")
	runCmd.Flags().BoolVar(&cfg.GitCommitSignOff, "git-commit-sign-off", env.GetBoolVal("GIT_COMMIT_SIGN_OFF", false), "Whether to sign-off git commits")
	runCmd.Flags().StringVar(&commitMessagePath, "git-commit-message-path", defaultCommitTemplatePath, "Path to a template to use for Git commit messages")
	runCmd.Flags().BoolVar(&cfg.DisableKubeEvents, "disable-kube-events", env.GetBoolVal("IMAGE_UPDATER_KUBE_EVENTS", false), "Disable kubernetes events")

[chengfang]

While adding such an object makes it more descriptive, but it also creates another indirection. The current code block is a bit dense, but with a good IDE, it shouldn't look too bad.