1 files changed, 80 insertions, 0 deletions
diff --git a/linesScanner.go b/linesScanner.go
new file mode 100644
index 0000000..6677b45
--- /dev/null
+++ b/linesScanner.go
@@ -0,0 +1,80 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
+package gitpb
+
+import (
+	"fmt"
+	sync "sync"
+)
+
+// taken from autogenpb. this should be in some generic library or just in GO
+// var allTheLines *LinesScanner
+
+// newLinesScanner initializes a new LinesScanner iterator with a slice of strings.
+func NewLinesScanner(things []string) *LinesScanner {
+	return &LinesScanner{things: things}
+}
+
+// LinesScanner provides an iterator over a slice of strings, allowing for
+// sequential access and the ability to un-scan (step back).
+type LinesScanner struct {
+	sync.Mutex
+
+	things []string
+	index  int
+}
+
+// Scan advances the iterator to the next line. It returns false if there are
+// no more lines.
+func (it *LinesScanner) Scan() bool {
+	if it.index >= len(it.things) {
+		return false
+	}
+	it.Lock()
+	it.index++
+	it.Unlock()
+	return true
+}
+
+// UnScan moves the iterator back one line. It returns false if the iterator
+// is already at the beginning.
+func (it *LinesScanner) UnScan() bool {
+	if it.index < 1 {
+		it.index = 0
+		return false
+	}
+	it.Lock()
+	it.index--
+	it.Unlock()
+	return true
+}
+
+// NextRaw returns the current line from the scanner without any modification.
+func (it *LinesScanner) NextRaw() string {
+	if it.index-1 == len(it.things) {
+		fmt.Println("Next() error in LinesScanner", it.index)
+	}
+	return it.things[it.index-1]
+}
+
+func (it *LinesScanner) Err() error {
+	return nil
+}
+
+// alias as some scanners use Text()
+func (it *LinesScanner) Text() string {
+	return it.Next()
+}
+
+// Next returns the current line from the scanner with leading and trailing
+// whitespace removed.
+func (it *LinesScanner) Next() string {
+	if it.index-1 == len(it.things) {
+		fmt.Println("Next() error in LinesScanner", it.index)
+	}
+	// out := commentPreprocessor(it.things[it.index-1])
+	out := it.things[it.index-1]
+	return out
+	// return out
+}