Rename "container" to "image"

- Updated `wwctl upgrade` to handle updates
- Maintained `.Container` and `.ContainerName` in tstruct
- Added `ContainerName()` methods to node and profile objects
- Added `--container`, `-C` aliases to wwctl commands (`<node|profile> <add|set>`)
- Added `wwctl container` alias
- Added support for `container_exit.sh` if `image_exit.sh` is not found

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/image/exec/main_test.go

@@ -0,0 +1,106 @@
+package exec
+
+import (
+	"bytes"
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/warewulf/warewulf/internal/pkg/testenv"
+	"github.com/warewulf/warewulf/internal/pkg/warewulfd"
+)
+
+func mockChildCmd(cmd *cobra.Command, args []string) error {
+	child := exec.Command("/usr/bin/echo", args...)
+	child.Stdin = cmd.InOrStdin()
+	child.Stdout = cmd.OutOrStdout()
+	child.Stderr = cmd.ErrOrStderr()
+	return child.Run()
+}
+
+func Test_Exec(t *testing.T) {
+	env := testenv.New(t)
+	defer env.RemoveAll()
+	env.MkdirAll("/var/lib/warewulf/chroots/test/rootfs")
+	childCommandFunc = mockChildCmd
+	defer func() {
+		childCommandFunc = runChildCmd
+	}()
+	warewulfd.SetNoDaemon()
+
+	tests := []struct {
+		name   string
+		args   []string
+		stdout string
+		build  bool
+	}{
+		{
+			name:   "plain test",
+			args:   []string{"test", "/bin/true"},
+			stdout: `--loglevel 20 image exec __child test -- /bin/true`,
+			build:  true,
+		},
+		{
+			name:   "test with --bind",
+			args:   []string{"test", "--bind", "/tmp", "/bin/true"},
+			stdout: `--loglevel 20 image exec __child test --bind /tmp -- /bin/true`,
+			build:  true,
+		},
+		{
+			name:   "test with --node",
+			args:   []string{"test", "--node", "node1", "/bin/true"},
+			stdout: `--loglevel 20 image exec __child test --node node1 -- /bin/true`,
+			build:  true,
+		},
+		{
+			name:   "test with --build=false",
+			args:   []string{"test", "--build=false", "/bin/true"},
+			stdout: `--loglevel 20 image exec __child test -- /bin/true`,
+			build:  false,
+		},
+		{
+			name:   "test with --node and --bind",
+			args:   []string{"test", "--bind", "/tmp", "--node", "node1", "/bin/true"},
+			stdout: `--loglevel 20 image exec __child test --bind /tmp --node node1 -- /bin/true`,
+			build:  true,
+		},
+		{
+			name:   "test with complex command",
+			args:   []string{"test", "/bin/bash", "echo 'hello'"},
+			stdout: `--loglevel 20 image exec __child test -- /bin/bash echo 'hello'`,
+			build:  true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			defer func() {
+				binds = []string{}
+				nodeName = ""
+				Build = true
+				SyncUser = false
+				os.Remove(env.GetPath("/srv/warewulf/image/test.img"))
+				os.Remove(env.GetPath("/srv/warewulf/image/test.img.gz"))
+			}()
+			cmd := GetCommand()
+			cmd.SetArgs(tt.args)
+			out := bytes.NewBufferString("")
+			err := bytes.NewBufferString("")
+			cmd.SetOut(out)
+			cmd.SetErr(err)
+			assert.NoError(t, cmd.Execute())
+			assert.NotEmpty(t, out.String())
+			assert.Contains(t, out.String(), tt.stdout)
+			if tt.build {
+				assert.FileExists(t, env.GetPath("/srv/warewulf/image/test.img"))
+				assert.FileExists(t, env.GetPath("/srv/warewulf/image/test.img.gz"))
+			} else {
+				assert.NoFileExists(t, env.GetPath("/srv/warewulf/image/test.img"))
+				assert.NoFileExists(t, env.GetPath("/srv/warewulf/image/test.img.gz"))
+			}
+		})
+	}
+}