Add support for abbreviated commands on interative command like

Support commands like "top10" or "web5"

internal/driver/interactive.go

@@ -218,7 +218,20 @@ func parseCommandLine(input []string) ([]string, variables, error) {
 	cmd, args := input[:1], input[1:]
 	name := cmd[0]
 
-	c := pprofCommands[cmd[0]]
+	c := pprofCommands[name]
+	if c == nil {
+		// Attempt splitting digits on abbreviated commands (eg top10)
+		for i := len(name); i > 0; i-- {
+			if !strings.ContainsAny(name[i-1:i], "0123456789") {
+				if n, d := name[:i], name[i:]; n != "" && d != "" {
+					cmd[0], args = n, append([]string{d}, args...)
+					name = n
+					c = pprofCommands[n]
+				}
+				break
+			}
+		}
+	}
 	if c == nil {
 		return nil, nil, fmt.Errorf("Unrecognized command: %q", name)
 	}

internal/driver/interactive_test.go

@@ -247,6 +247,16 @@ func TestInteractiveCommands(t *testing.T) {
 				"ignore":    "ignore",
 			},
 		},
+		{
+			"top10 --cum focus1 -ignore focus2",
+			map[string]string{
+				"functions": "true",
+				"nodecount": "10",
+				"cum":       "true",
+				"focus":     "focus1|focus2",
+				"ignore":    "ignore",
+			},
+		},
 		{
 			"dot",
 			map[string]string{
@@ -288,14 +298,23 @@ func TestInteractiveCommands(t *testing.T) {
 				"output":    "out",
 			},
 		},
+		{
+			"999",
+			nil, // Error
+		},
 	}
 
 	for _, tc := range testcases {
 		cmd, vars, err := parseCommandLine(strings.Fields(tc.input))
-		vars = applyCommandOverrides(cmd, vars)
+		if tc.want == nil && err != nil {
+			// Error expected
+			continue
+		}
 		if err != nil {
 			t.Errorf("failed on %q: %v", tc.input, err)
+			continue
 		}
+		vars = applyCommandOverrides(cmd, vars)
 
 		for n, want := range tc.want {
 			if got := vars[n].stringValue(); got != want {