fix cli cmds panics

Signed-off-by: Mustafa Elbehery <melbeher@redhat.com>

cmd/bbolt/main.go

@@ -60,6 +60,9 @@ var (
 
 	// ErrKeyNotFound is returned when a key is not found.
 	ErrKeyNotFound = errors.New("key not found")
+
+	// ErrNotEnoughArgs is returned with a cmd is being executed with fewer arguments.
+	ErrNotEnoughArgs = errors.New("not enough arguments")
 )
 
 func main() {
@@ -908,6 +911,11 @@ func (cmd *keysCommand) Run(args ...string) error {
 
 	// Require database path and bucket.
 	relevantArgs := fs.Args()
+	if len(relevantArgs) < 2 {
+		err := fmt.Errorf("Error: %w.\n", ErrNotEnoughArgs)
+		fmt.Fprintln(cmd.Stderr, cmd.Usage())
+		return err
+	}
 	path, buckets := relevantArgs[0], relevantArgs[1:]
 	if path == "" {
 		return ErrPathRequired
@@ -993,6 +1001,11 @@ func (cmd *getCommand) Run(args ...string) error {
 
 	// Require database path, bucket and key.
 	relevantArgs := fs.Args()
+	if len(relevantArgs) < 3 {
+		err := fmt.Errorf("Error: %w.\n", ErrNotEnoughArgs)
+		fmt.Fprintln(cmd.Stderr, cmd.Usage())
+		return err
+	}
 	path, buckets := relevantArgs[0], relevantArgs[1:len(relevantArgs)-1]
 	key, err := parseBytes(relevantArgs[len(relevantArgs)-1], parseFormat)
 	if err != nil {

cmd/bbolt/main_test.go

@@ -397,6 +397,60 @@ func TestCompactCommand_Run(t *testing.T) {
 	}
 }
 
+func TestCommands_Run_NoArgs(t *testing.T) {
+	testCases := []struct {
+		name      string
+		cmd       string
+		expErr    error
+		expStdErr string
+	}{
+		{
+			name:   "get",
+			cmd:    "get",
+			expErr: main.ErrNotEnoughArgs,
+			expStdErr: `usage: bolt get PATH [BUCKET..] KEY
+
+Print the value of the given key in the given (sub)bucket.
+
+Additional options include:
+
+	--format
+		Output format. One of: auto|ascii-encoded|hex|bytes|redacted (default=auto)
+	--parse-format
+		Input format (of key). One of: ascii-encoded|hex (default=ascii-encoded)"
+
+`,
+		},
+		{
+			name:   "keys",
+			cmd:    "keys",
+			expErr: main.ErrNotEnoughArgs,
+			expStdErr: `usage: bolt keys PATH [BUCKET...]
+
+Print a list of keys in the given (sub)bucket.
+=======
+
+Additional options include:
+
+	--format
+		Output format. One of: auto|ascii-encoded|hex|bytes|redacted (default=auto)
+
+Print a list of keys in the given bucket.
+
+`,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			m := NewMain()
+			err := m.Run(tc.cmd)
+			require.ErrorIs(t, err, main.ErrNotEnoughArgs)
+			require.Equal(t, tc.expStdErr, m.Stderr.String())
+		})
+	}
+}
+
 func fillBucket(b *bolt.Bucket, prefix []byte) error {
 	n := 10 + rand.Intn(50)
 	for i := 0; i < n; i++ {