Merge pull request #27132 from NotSoFancyName/interface-completion

cmd: add autocomplete for network create --interface-name flag

cmd/podman/common/completion.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"fmt"
 	"io/fs"
+	"net"
 	"os"
 	"path"
 	"path/filepath"
@@ -1880,6 +1881,20 @@ func AutocompleteNetworkFilters(cmd *cobra.Command, args []string, toComplete st
 	return completeKeyValues(toComplete, kv)
 }
 
+// AutocompleteNetworkInterfaceNames - Autocomplete network create --interface-name options.
+func AutocompleteNetworkInterfaceNames(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		cobra.CompErrorln(err.Error())
+		return nil, cobra.ShellCompDirectiveDefault
+	}
+	interfaceNames := make([]string, 0, len(interfaces))
+	for _, iface := range interfaces {
+		interfaceNames = append(interfaceNames, iface.Name)
+	}
+	return interfaceNames, cobra.ShellCompDirectiveNoFileComp
+}
+
 // AutocompleteVolumeFilters - Autocomplete volume ls --filter options.
 func AutocompleteVolumeFilters(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 	local := func(_ string) ([]string, cobra.ShellCompDirective) {

cmd/podman/networks/create.go

@@ -85,7 +85,7 @@ func networkCreateFlags(cmd *cobra.Command) {
 
 	interfaceFlagName := "interface-name"
 	flags.StringVar(&networkCreateOptions.InterfaceName, interfaceFlagName, "", "interface name which is used by the driver")
-	_ = cmd.RegisterFlagCompletionFunc(interfaceFlagName, completion.AutocompleteNone)
+	_ = cmd.RegisterFlagCompletionFunc(interfaceFlagName, common.AutocompleteNetworkInterfaceNames)
 
 	flags.BoolVar(&networkCreateOptions.DisableDNS, "disable-dns", false, "disable dns plugin")
 

test/system/600-completion.bats

@@ -422,3 +422,11 @@ function _check_no_suggestions() {
 
     _check_completion_end NoFileComp
 }
+
+@test "podman network create --interface-name" {
+    run_completion network create --interface-name l
+
+    assert "$output" =~ '.*lo.*' "Loopback interface should be present by default"
+
+    _check_completion_end NoFileComp
+}