From 271a97847e51d8f2b95b9d101e7762747d335fd0 Mon Sep 17 00:00:00 2001
From: Sorin Neacsu <sorin.neacsu@gmail.com>
Date: Wed, 6 Dec 2017 07:25:51 -0800
Subject: [PATCH] console: admin.clearHistory() command

---
 console/console.go  | 8 ++++++++
 console/prompter.go | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/console/console.go b/console/console.go
index c42c9bfbb3..aa9562cfc6 100644
--- a/console/console.go
+++ b/console/console.go
@@ -192,6 +192,7 @@ func (c *Console) init(preload []string) error {
 	if obj := admin.Object(); obj != nil { // make sure the admin api is enabled over the interface
 		obj.Set("sleepBlocks", bridge.SleepBlocks)
 		obj.Set("sleep", bridge.Sleep)
+		obj.Set("clearHistory", c.clearHistory)
 	}
 	// Preload any JavaScript files before starting the console
 	for _, path := range preload {
@@ -216,6 +217,13 @@ func (c *Console) init(preload []string) error {
 	return nil
 }
 
+func (c *Console) clearHistory() {
+	c.history = nil
+	c.prompter.ClearHistory()
+	os.Remove(c.histPath)
+	fmt.Fprintf(c.printer, "history cleared\n")
+}
+
 // consoleOutput is an override for the console.log and console.error methods to
 // stream the output into the configured output stream instead of stdout.
 func (c *Console) consoleOutput(call otto.FunctionCall) otto.Value {
diff --git a/console/prompter.go b/console/prompter.go
index 6acbfb0e25..ea03694d41 100644
--- a/console/prompter.go
+++ b/console/prompter.go
@@ -51,6 +51,9 @@ type UserPrompter interface {
 	// if and only if the prompt to append was a valid command.
 	AppendHistory(command string)
 
+	// ClearHistory clears the entire history
+	ClearHistory()
+
 	// SetWordCompleter sets the completion function that the prompter will call to
 	// fetch completion candidates when the user presses tab.
 	SetWordCompleter(completer WordCompleter)
@@ -158,6 +161,11 @@ func (p *terminalPrompter) AppendHistory(command string) {
 	p.State.AppendHistory(command)
 }
 
+// ClearHistory clears the entire history
+func (p *terminalPrompter) ClearHistory() {
+	p.State.ClearHistory()
+}
+
 // SetWordCompleter sets the completion function that the prompter will call to
 // fetch completion candidates when the user presses tab.
 func (p *terminalPrompter) SetWordCompleter(completer WordCompleter) {