Add --add-ignore-paths flag to artifact commands

The existing --ignore-paths flag replaces the built-in default exclude
list (VCS files and common ignored extensions), which forces users to
re-specify every default when they only need to add one extra pattern.

This change introduces --add-ignore-paths for push/build/diff artifact,
which appends its values to whichever ignore set is currently in effect
(defaults when --ignore-paths is omitted, or the user override when it
is provided). --ignore-paths semantics are unchanged.

Signed-off-by: Ruslan Shaydullin <shaydullin.r.d@outlook.com>
Assisted-by: claude-code/claude-opus-4-7

cmd/flux/push_artifact.go

@@ -109,6 +109,7 @@ type pushArtifactFlags struct {
 	creds           string
 	provider        flags.SourceOCIProvider
 	ignorePaths     []string
+	addIgnorePaths  []string
 	annotations     []string
 	output          string
 	debug           bool
@@ -132,6 +133,7 @@ func init() {
 	pushArtifactCmd.Flags().StringVar(&pushArtifactArgs.creds, "creds", "", "credentials for OCI registry in the format <username>[:<password>] if --provider is generic")
 	pushArtifactCmd.Flags().Var(&pushArtifactArgs.provider, "provider", pushArtifactArgs.provider.Description())
 	pushArtifactCmd.Flags().StringSliceVar(&pushArtifactArgs.ignorePaths, "ignore-paths", excludeOCI, "set paths to ignore in .gitignore format")
+	pushArtifactCmd.Flags().StringSliceVar(&pushArtifactArgs.addIgnorePaths, "add-ignore-paths", nil, "additional paths to ignore in .gitignore format (appended to --ignore-paths)")
 	pushArtifactCmd.Flags().StringArrayVarP(&pushArtifactArgs.annotations, "annotations", "a", nil, "Set custom OCI annotations in the format '<key>=<value>'")
 	pushArtifactCmd.Flags().StringVarP(&pushArtifactArgs.output, "output", "o", "",
 		"the format in which the artifact digest should be printed, can be 'json' or 'yaml'")
@@ -286,7 +288,7 @@ func pushArtifactCmdRun(cmd *cobra.Command, args []string) error {
 	ociClient := oci.NewClient(opts)
 	digestURL, err := ociClient.Push(ctx, url, path,
 		oci.WithPushMetadata(meta),
-		oci.WithPushIgnorePaths(pushArtifactArgs.ignorePaths...),
+		oci.WithPushIgnorePaths(composeIgnorePaths(pushArtifactArgs.ignorePaths, pushArtifactArgs.addIgnorePaths)...),
 	)
 	if err != nil {
 		return fmt.Errorf("pushing artifact failed: %w", err)