runOnStartup watch option

docs/config/index.md

@@ -34,6 +34,7 @@ You can override this using the [`--config` flag or `CONFIG` env var with `serve
       schedule: "0 */6 * * *"
       jitter: 30s
       firstCheckNotif: false
+      runOnStartup: true
 
     notif:
       amqp:
@@ -129,6 +130,7 @@ All configuration from file can be transposed into environment variables. As an
       schedule: "0 */6 * * *"
       jitter: 30s
       firstCheckNotif: false
+      runOnStartup: true
 
     notif:
       gotify:
@@ -183,6 +185,7 @@ Can be transposed to:
     DIUN_WATCH_SCHEDULE=0 */6 * * *
     DIUN_WATCH_JITTER=30s
     DIUN_WATCH_FIRSTCHECKNOTIF=false
+    DIUN_WATCH_RUNONSTARTUP=true
 
     DIUN_NOTIF_GOTIFY_ENDPOINT=http://gotify.foo.com
     DIUN_NOTIF_GOTIFY_TOKEN=Token123456

docs/config/watch.md

@@ -8,6 +8,7 @@ watch:
   schedule: "0 */6 * * *"
   jitter: 30s
   firstCheckNotif: false
+  runOnStartup: true
   compareDigest: true
   healthchecks:
     baseURL: https://hc-ping.com/
@@ -76,6 +77,19 @@ Send notification at the very first analysis of an image. (default `false`)
 !!! abstract "Environment variables"
     * `DIUN_WATCH_FIRSTCHECKNOTIF`
 
+### `runOnStartup`
+
+Check for updates on startup. (default `true`)
+
+!!! example "Config file"
+    ```yaml
+    watch:
+      runOnStartup: true
+    ```
+
+!!! abstract "Environment variables"
+    * `DIUN_WATCH_RUNONSTARTUP`
+
 ### `compareDigest`
 
 Compare the digest of an image with the registry before downloading the image manifest. It is strongly

internal/app/diun.go

@@ -103,8 +103,9 @@ func (di *Diun) Start() error {
 		}
 	}()
 
-	// Run on startup
-	di.Run()
+	if *di.cfg.Watch.RunOnStartup {
+		di.Run()
+	}
 
 	// Init scheduler if defined
 	if len(di.cfg.Watch.Schedule) == 0 {

internal/config/config_test.go

@@ -1,8 +1,6 @@
 package config_test
 
 import (
-	"fmt"
-	"os"
 	"strings"
 	"testing"
 	"time"
@@ -54,6 +52,7 @@ func TestLoadFile(t *testing.T) {
 					Schedule:        "*/30 * * * *",
 					Jitter:          utl.NewDuration(30 * time.Second),
 					FirstCheckNotif: utl.NewTrue(),
+					RunOnStartup:    utl.NewFalse(),
 					CompareDigest:   utl.NewTrue(),
 					Healthchecks: &model.Healthchecks{
 						BaseURL: "https://hc-ping.com/",
@@ -247,8 +246,6 @@ for <code>{{ .Entry.Manifest.Platform }}</code> platform.
 }
 
 func TestLoadEnv(t *testing.T) {
-	defer UnsetEnv("DIUN_")
-
 	testCases := []struct {
 		desc     string
 		cfg      string
@@ -372,12 +369,10 @@ func TestLoadEnv(t *testing.T) {
 	for _, tt := range testCases {
 		tt := tt
 		t.Run(tt.desc, func(t *testing.T) {
-			UnsetEnv("DIUN_")
-
 			if tt.environ != nil {
 				for _, environ := range tt.environ {
 					n := strings.SplitN(environ, "=", 2)
-					os.Setenv(n[0], n[1])
+					t.Setenv(n[0], n[1])
 				}
 			}
 
@@ -394,8 +389,6 @@ func TestLoadEnv(t *testing.T) {
 }
 
 func TestLoadMixed(t *testing.T) {
-	defer UnsetEnv("DIUN_")
-
 	testCases := []struct {
 		desc     string
 		cfg      string
@@ -497,12 +490,10 @@ for <code>{{ .Entry.Manifest.Platform }}</code> platform.
 	for _, tt := range testCases {
 		tt := tt
 		t.Run(tt.desc, func(t *testing.T) {
-			UnsetEnv("DIUN_")
-
 			if tt.environ != nil {
 				for _, environ := range tt.environ {
 					n := strings.SplitN(environ, "=", 2)
-					os.Setenv(n[0], n[1])
+					t.Setenv(n[0], n[1])
 				}
 			}
 
@@ -532,61 +523,8 @@ func TestValidation(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			cfg, err := config.Load(tt.cfg)
 			require.NoError(t, err)
-
-			dec, err := env.Encode("DIUN_", cfg)
+			_, err = env.Encode("DIUN_", cfg)
 			require.NoError(t, err)
-			for _, value := range dec {
-				fmt.Printf(`%s=%s\n`, value.Name, value.Default)
-			}
 		})
 	}
 }
-
-func UnsetEnv(prefix string) (restore func()) {
-	before := map[string]string{}
-
-	for _, e := range os.Environ() {
-		if !strings.HasPrefix(e, prefix) {
-			continue
-		}
-
-		parts := strings.SplitN(e, "=", 2)
-		before[parts[0]] = parts[1]
-
-		os.Unsetenv(parts[0])
-	}
-
-	return func() {
-		after := map[string]string{}
-
-		for _, e := range os.Environ() {
-			if !strings.HasPrefix(e, prefix) {
-				continue
-			}
-
-			parts := strings.SplitN(e, "=", 2)
-			after[parts[0]] = parts[1]
-
-			// Check if the envar previously existed
-			v, ok := before[parts[0]]
-			if !ok {
-				// This is a newly added envar with prefix, zap it
-				os.Unsetenv(parts[0])
-				continue
-			}
-
-			if parts[1] != v {
-				// If the envar value has changed, set it back
-				os.Setenv(parts[0], v)
-			}
-		}
-
-		// Still need to check if there have been any deleted envars
-		for k, v := range before {
-			if _, ok := after[k]; !ok {
-				// k is not present in after, so we set it.
-				os.Setenv(k, v)
-			}
-		}
-	}
-}

internal/config/fixtures/config.test.yml

@@ -6,6 +6,7 @@ watch:
   schedule: "*/30 * * * *"
   jitter: 30s
   firstCheckNotif: true
+  runOnStartup: false
   compareDigest: true
   healthchecks:
     baseURL: https://hc-ping.com/

internal/model/watch.go

@@ -12,6 +12,7 @@ type Watch struct {
 	Schedule        string         `yaml:"schedule,omitempty" json:"schedule,omitempty"`
 	Jitter          *time.Duration `yaml:"jitter,omitempty" json:"jitter,omitempty" validate:"required"`
 	FirstCheckNotif *bool          `yaml:"firstCheckNotif,omitempty" json:"firstCheckNotif,omitempty" validate:"required"`
+	RunOnStartup    *bool          `yaml:"runOnStartup,omitempty" json:"runOnStartup,omitempty" validate:"required"`
 	CompareDigest   *bool          `yaml:"compareDigest,omitempty" json:"compareDigest,omitempty" validate:"required"`
 	Healthchecks    *Healthchecks  `yaml:"healthchecks,omitempty" json:"healthchecks,omitempty"`
 }
@@ -28,5 +29,6 @@ func (s *Watch) SetDefaults() {
 	s.Workers = 10
 	s.Jitter = utl.NewDuration(30 * time.Second)
 	s.FirstCheckNotif = utl.NewFalse()
+	s.RunOnStartup = utl.NewTrue()
 	s.CompareDigest = utl.NewTrue()
 }