libpod: include names-generator.go

In the moby/moby, the namesgenerator is internal. We still want to
depend on it, so this commit copies it from moby/moby to our code-base.

The good thing is the file is frozen upstream, so no more changes are
going to appear in it.

Fixes: #27536.

Signed-off-by: Jan Kaluza <jkaluza@redhat.com>

Author: jankaluza

go.mod

@@ -22,7 +22,6 @@ require (
 	github.com/cyphar/filepath-securejoin v0.6.1
 	github.com/digitalocean/go-qemu v0.0.0-20250212194115-ee9b0668d242
 	github.com/docker/distribution v2.8.3+incompatible
-	github.com/docker/docker v28.5.2+incompatible
 	github.com/docker/go-connections v0.6.0
 	github.com/docker/go-plugins-helpers v0.0.0-20240701071450-45e2431495c8
 	github.com/docker/go-units v0.5.0
@@ -110,6 +109,7 @@ require (
 	github.com/digitalocean/go-libvirt v0.0.0-20220804181439-8648fbde413e // indirect
 	github.com/disiqueira/gotree/v3 v3.0.2 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
+	github.com/docker/docker v28.5.2+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.9.5 // indirect
 	github.com/ebitengine/purego v0.9.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect

…er/pkg/namesgenerator/names-generator.go libpod/namesgenerator/names-generator.govendor/github.com/docker/docker/pkg/namesgenerator/names-generator.go renamed to libpod/namesgenerator/names-generator.go vendor/github.com/docker/docker/pkg/namesgenerator/names-generator.go renamed to libpod/namesgenerator/names-generator.go

@@ -1,3 +1,8 @@
+// This file has been copied from
+// https://github.com/moby/moby/tree/a52171f5eeb6e553e7c4744abf6b722962b2aca4/internal/namesgenerator.
+// It is licensed under the Apache License 2.0.
+// See https://github.com/moby/moby/blob/a52171f5eeb6e553e7c4744abf6b722962b2aca4/LICENSE.
+//
 // Package namesgenerator generates random names.
 //
 // This package is officially "frozen" - no new additions will be accepted.
@@ -263,7 +268,7 @@ var (
 		// David Lee Chaum - American computer scientist and cryptographer. Known for his seminal contributions in the field of anonymous communication. https://en.wikipedia.org/wiki/David_Chaum
 		"chaum",
 
-		// Pafnuty Chebyshev - Russian mathematician. He is known fo his works on probability, statistics, mechanics, analytical geometry and number theory https://en.wikipedia.org/wiki/Pafnuty_Chebyshev
+		// Pafnuty Chebyshev - Russian mathematician. He is known for his works on probability, statistics, mechanics, analytical geometry and number theory https://en.wikipedia.org/wiki/Pafnuty_Chebyshev
 		"chebyshev",
 
 		// Joan Clarke - Bletchley Park code breaker during the Second World War who pioneered techniques that remained top secret for decades. Also an accomplished numismatist https://en.wikipedia.org/wiki/Joan_Clarke
@@ -793,7 +798,7 @@ var (
 		// Dorothy Vaughan was a NASA mathematician and computer programmer on the SCOUT launch vehicle program that put America's first satellites into space - https://en.wikipedia.org/wiki/Dorothy_Vaughan
 		"vaughan",
 
-		// Cédric Villani - French mathematician, won Fields Medal, Fermat Prize and Poincaré Price for his work in differential geometry and statistical mechanics. https://en.wikipedia.org/wiki/C%C3%A9dric_Villani
+		// Cédric Villani - French mathematician, won Fields Medal, Fermat Prize and Poincaré Prize for his work in differential geometry and statistical mechanics. https://en.wikipedia.org/wiki/C%C3%A9dric_Villani
 		"villani",
 
 		// Sir Mokshagundam Visvesvaraya - is a notable Indian engineer.  He is a recipient of the Indian Republic's highest honour, the Bharat Ratna, in 1955. On his birthday, 15 September is celebrated as Engineer's Day in India in his memory - https://en.wikipedia.org/wiki/Visvesvaraya

libpod/namesgenerator/names-generator_test.go

@@ -0,0 +1,40 @@
+// This file has been copied from
+// https://github.com/moby/moby/tree/a52171f5eeb6e553e7c4744abf6b722962b2aca4/internal/namesgenerator.
+// It is licensed under the Apache License 2.0.
+// See https://github.com/moby/moby/blob/a52171f5eeb6e553e7c4744abf6b722962b2aca4/LICENSE.
+
+package namesgenerator
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestNameFormat(t *testing.T) {
+	name := GetRandomName(0)
+	if !strings.Contains(name, "_") {
+		t.Fatalf("Generated name does not contain an underscore")
+	}
+	if strings.ContainsAny(name, "0123456789") {
+		t.Fatalf("Generated name contains numbers!")
+	}
+}
+
+func TestNameRetries(t *testing.T) {
+	name := GetRandomName(1)
+	if !strings.Contains(name, "_") {
+		t.Fatalf("Generated name does not contain an underscore")
+	}
+	if !strings.ContainsAny(name, "0123456789") {
+		t.Fatalf("Generated name doesn't contain a number")
+	}
+}
+
+func BenchmarkGetRandomName(b *testing.B) {
+	b.ReportAllocs()
+	var out string
+	for b.Loop() {
+		out = GetRandomName(5)
+	}
+	b.Log("Last result:", out)
+}

libpod/runtime.go

@@ -19,14 +19,14 @@ import (
 	"github.com/containers/podman/v6/libpod/define"
 	"github.com/containers/podman/v6/libpod/events"
 	"github.com/containers/podman/v6/libpod/lock"
+	"github.com/containers/podman/v6/libpod/namesgenerator"
 	"github.com/containers/podman/v6/libpod/plugin"
 	"github.com/containers/podman/v6/libpod/shutdown"
 	"github.com/containers/podman/v6/pkg/domain/entities"
 	"github.com/containers/podman/v6/pkg/domain/entities/reports"
 	"github.com/containers/podman/v6/pkg/rootless"
 	"github.com/containers/podman/v6/pkg/systemd"
 	"github.com/containers/podman/v6/pkg/util"
-	"github.com/docker/docker/pkg/namesgenerator"
 	"github.com/hashicorp/go-multierror"
 	jsoniter "github.com/json-iterator/go"
 	spec "github.com/opencontainers/runtime-spec/specs-go"

vendor/modules.txt

@@ -251,7 +251,6 @@ github.com/docker/docker/api/types/swarm/runtime
 github.com/docker/docker/api/types/versions
 github.com/docker/docker/pkg/homedir
 github.com/docker/docker/pkg/jsonmessage
-github.com/docker/docker/pkg/namesgenerator
 github.com/docker/docker/pkg/stdcopy
 # github.com/docker/docker-credential-helpers v0.9.5
 ## explicit; go 1.21