feat: introduce exit code failure option for db update check (#1463)

Signed-off-by: Felix Becker <git@felixbecker.name>
Signed-off-by: Christopher Phillips <christopher.phillips@anchore.com>
Signed-off-by: Keith Zantow <kzantow@gmail.com>
Co-authored-by: Christopher Phillips <christopher.phillips@anchore.com>
Co-authored-by: Keith Zantow <kzantow@gmail.com>

cmd/grype/cli/commands/db_check.go

@@ -2,6 +2,7 @@ package commands
 
 import (
  "fmt"
+ "os"
 
  "github.com/spf13/cobra"
 
@@ -11,6 +12,10 @@ import (
  "github.com/anchore/grype/internal/bus"
 )
 
+const (
+ exitCodeOnDBUpgradeAvailable = 100
+)
+
 func DBCheck(app clio.Application) *cobra.Command {
  opts := dbOptionsDefault(app.ID())
 
@@ -51,5 +56,7 @@ func runDBCheck(opts options.Database) error {
  fmt.Printf("Updated DB URL: %s\n", updateDBEntry.URL.String())
  fmt.Println("You can run 'grype db update' to update to the latest db")
 
+ os.Exit(exitCodeOnDBUpgradeAvailable) //nolint:gocritic
+
  return nil
 }