Fix --header-lines unaffected by --with-nth

man/man1/fzf.1

@@ -260,10 +260,14 @@ automatically truncated when the number of the lines exceeds the value.
 .TP
 .BI "--header-file=" "FILE"
 The content of the file will be printed as the sticky header. The file can
-span multiple lines and can contain ANSI color codes.
+span multiple lines and can contain ANSI color codes. The lines in the file are
+displayed from top to bottom regardless of \fB--reverse\fR, and are
+not affected by \fB--with-nth\fR.
 .TP
 .BI "--header-lines=" "N"
-The first N lines of the input are treated as the sticky header.
+The first N lines of the input are treated as the sticky header. When
+\fB--with-nth\fR is set, the lines are transformed just like the other
+lines that follow.
 .SS Scripting
 .TP
 .BI "-q, --query=" "STR"

src/core.go

@@ -104,13 +104,13 @@ func Run(opts *Options) {
 		})
 	} else {
 		chunkList = NewChunkList(func(data *string, index int) *Item {
+			tokens := Tokenize(data, opts.Delimiter)
+			trans := Transform(tokens, opts.WithNth)
 			if len(header) < opts.HeaderLines {
-				header = append(header, *data)
+				header = append(header, *joinTokens(trans))
 				eventBox.Set(EvtHeader, header)
 				return nil
 			}
-			tokens := Tokenize(data, opts.Delimiter)
-			trans := Transform(tokens, opts.WithNth)
 			item := Item{
 				text:     joinTokens(trans),
 				origText: data,

test/test_go.rb

@@ -688,6 +688,18 @@ class TestGoFZF < TestBase
     assert_equal '', readonce.chomp
   end
 
+  def test_header_lines_with_nth
+    tmux.send_keys "seq 100 | #{fzf "--header-lines 5 --with-nth 1,1,1,1,1"}", :Enter
+    tmux.until do |lines|
+      lines[-2].include?('95/95') &&
+      lines[-3] == '  11111' &&
+      lines[-7] == '  55555' &&
+      lines[-8] == '> 66666'
+    end
+    tmux.send_keys :Enter
+    assert_equal '6', readonce.chomp
+  end
+
   def test_header_file
     tmux.send_keys "seq 100 | #{fzf "--header-file <(head -5 #{__FILE__})"}", :Enter
     header = File.readlines(__FILE__).take(5).map(&:strip)
@@ -698,7 +710,7 @@ class TestGoFZF < TestBase
   end
 
   def test_header_file_reverse
-    tmux.send_keys "seq 100 | #{fzf "--header-file <(head -5 #{__FILE__}) --reverse"}", :Enter
+    tmux.send_keys "seq 100 | #{fzf "--header-file=<(head -5 #{__FILE__}) --reverse"}", :Enter
     header = File.readlines(__FILE__).take(5).map(&:strip)
     tmux.until do |lines|
       lines[1].include?('100/100') &&