From ffe3107397b0b88cfd8b2fe512dc9cf59e234c4f Mon Sep 17 00:00:00 2001
From: Sven Woldt <sven.woldt@shell.com>
Date: Sat, 8 Apr 2023 20:33:37 +0200
Subject: [PATCH 1/3] deduplicate list

---
 common.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/common.go b/common.go
index a85b025..06b6113 100644
--- a/common.go
+++ b/common.go
@@ -125,9 +125,30 @@ func (s *State) WriteHistory(w io.Writer) (num int, err error) {
 		}
 		num++
 	}
+	s.history = deduplicateList(s.history)
 	return num, nil
 }
 
+// deduplicateList map to keep track of encountered strings.
+// If not, it adds it to the result slice and sets the encountered flag for that item to true.
+// If it has already been encountered, it skips and moves to the next item.
+// Returns slice with all duplicates removed.
+func deduplicateList(items []string) []string {
+	var (
+		ok     = map[string]bool{}
+		result = []string{}
+	)
+
+	for _, item := range items {
+		if !ok[item] {
+			ok[item] = true
+			result = append(result, item)
+		}
+	}
+
+	return result
+}
+
 // AppendHistory appends an entry to the scrollback history. AppendHistory
 // should be called iff Prompt returns a valid command.
 func (s *State) AppendHistory(item string) {

From 281e96323aeba7fdb2d871a37d027c574c4cc3b7 Mon Sep 17 00:00:00 2001
From: Sven Woldt <sven.woldt@shell.com>
Date: Sat, 8 Apr 2023 20:41:27 +0200
Subject: [PATCH 2/3] fix invoke

---
 common.go | 2 +-
 go.mod    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/common.go b/common.go
index 06b6113..62ae3b3 100644
--- a/common.go
+++ b/common.go
@@ -117,6 +117,7 @@ func (s *State) ReadHistory(r io.Reader) (num int, err error) {
 func (s *State) WriteHistory(w io.Writer) (num int, err error) {
 	s.historyMutex.RLock()
 	defer s.historyMutex.RUnlock()
+	s.history = deduplicateList(s.history)
 
 	for _, item := range s.history {
 		_, err := fmt.Fprintln(w, item)
@@ -125,7 +126,6 @@ func (s *State) WriteHistory(w io.Writer) (num int, err error) {
 		}
 		num++
 	}
-	s.history = deduplicateList(s.history)
 	return num, nil
 }
 
diff --git a/go.mod b/go.mod
index a246b2d..3a33173 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/peterh/liner
+module github.com/go-dockly/liner
 
 require (
 	github.com/mattn/go-runewidth v0.0.3

From ee07260f2e587aed0881c4154d58bf90a1feaa96 Mon Sep 17 00:00:00 2001
From: Sven Woldt <sven.woldt@shell.com>
Date: Sat, 8 Apr 2023 20:43:39 +0200
Subject: [PATCH 3/3] deduplicate list

---
 go.mod | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/go.mod b/go.mod
index 3a33173..a246b2d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/go-dockly/liner
+module github.com/peterh/liner
 
 require (
 	github.com/mattn/go-runewidth v0.0.3