Add completion for `--security-opt`

Signed-off-by: Harald Albers <github@albersweb.de>

cli/command/container/completion.go

@@ -68,6 +68,7 @@ func addCompletions(cmd *cobra.Command, dockerCLI completion.APIClientProvider)
 	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
 	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
 	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
+	_ = cmd.RegisterFlagCompletionFunc("security-opt", completeSecurityOpt)
 	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)
 	_ = cmd.RegisterFlagCompletionFunc("storage-opt", completeStorageOpt)
 	_ = cmd.RegisterFlagCompletionFunc("ulimit", completeUlimit)
@@ -122,6 +123,32 @@ func completePid(dockerCLI completion.APIClientProvider) func(cmd *cobra.Command
 	}
 }
 
+// completeSecurityOpt implements shell completion for the `--security-opt` option of `run` and `create`.
+// The completion is partly composite.
+func completeSecurityOpt(_ *cobra.Command, _ []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	if len(toComplete) > 0 && strings.HasPrefix("apparmor=", toComplete) { //nolint:gocritic // not swapped, matches partly typed "apparmor="
+		return []string{"apparmor="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if len(toComplete) > 0 && strings.HasPrefix("label", toComplete) { //nolint:gocritic // not swapped, matches partly typed "label"
+		return []string{"label="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if strings.HasPrefix(toComplete, "label=") {
+		if strings.HasPrefix(toComplete, "label=d") {
+			return []string{"label=disable"}, cobra.ShellCompDirectiveNoFileComp
+		}
+		labels := []string{"disable", "level:", "role:", "type:", "user:"}
+		return prefixWith("label=", labels), cobra.ShellCompDirectiveNoSpace | cobra.ShellCompDirectiveNoFileComp
+	}
+	// length must be > 1 here so that completion of "s" falls through.
+	if len(toComplete) > 1 && strings.HasPrefix("seccomp", toComplete) { //nolint:gocritic // not swapped, matches partly typed "seccomp"
+		return []string{"seccomp="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if strings.HasPrefix(toComplete, "seccomp=") {
+		return []string{"seccomp=unconfined"}, cobra.ShellCompDirectiveNoFileComp
+	}
+	return []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"}, cobra.ShellCompDirectiveNoFileComp
+}
+
 // completeStorageOpt implements shell completion for the `--storage-opt` option  of `run` and `create`.
 func completeStorageOpt(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
 	return []string{"size="}, cobra.ShellCompDirectiveNoSpace

cli/command/container/completion_test.go

@@ -73,6 +73,59 @@ func TestCompleteRestartPolicies(t *testing.T) {
 	assert.Check(t, is.DeepEqual(values, expected))
 }
 
+func TestCompleteSecurityOpt(t *testing.T) {
+	tests := []struct {
+		toComplete          string
+		expectedCompletions []string
+		expectedDirective   cobra.ShellCompDirective
+	}{
+		{
+			toComplete:          "",
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "apparmor=",
+			expectedCompletions: []string{"apparmor="},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace,
+		},
+		{
+			toComplete:          "label=",
+			expectedCompletions: []string{"label=disable", "label=level:", "label=role:", "label=type:", "label=user:"},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace | cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete: "s",
+			// We do not filter matching completions but delegate this task to the shell script.
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "se",
+			expectedCompletions: []string{"seccomp="},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace,
+		},
+		{
+			toComplete:          "seccomp=",
+			expectedCompletions: []string{"seccomp=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "sy",
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.toComplete, func(t *testing.T) {
+			completions, directive := completeSecurityOpt(nil, nil, tc.toComplete)
+			assert.Check(t, is.DeepEqual(completions, tc.expectedCompletions))
+			assert.Check(t, is.Equal(directive, tc.expectedDirective))
+		})
+	}
+}
+
 func TestCompleteSignals(t *testing.T) {
 	values, directives := completeSignals(nil, nil, "")
 	assert.Check(t, is.Equal(directives&cobra.ShellCompDirectiveNoFileComp, cobra.ShellCompDirectiveNoFileComp), "Should not perform file completion")