fix new reverse search behavior when existing buffer is non-empty

stdlib/REPL/src/History/prompt.jl

@@ -62,7 +62,7 @@ Initialize a custom REPL prompt tied to `events` using the existing `term`.
 Returns a tuple `(term, prompt, istate, pstate)` ready for
 input handling and display.
 """
-function create_prompt(events::Channel{Symbol}, term, prefix::String = "\e[90m")
+function create_prompt(events::Channel{Symbol}, term, prefix::String = "\e[90m", initial_query::String = "")
     prompt = REPL.LineEdit.Prompt(
         PROMPT_TEXT, # prompt
         prefix, "\e[0m", # prompt_prefix, prompt_suffix
@@ -78,6 +78,9 @@ function create_prompt(events::Channel{Symbol}, term, prefix::String = "\e[90m")
     interface = REPL.LineEdit.ModalInterface([prompt])
     istate = REPL.LineEdit.init_state(term, interface)
     pstate = istate.mode_state[prompt]
+    if !isempty(initial_query)
+        write(pstate.input_buffer, initial_query)
+    end
     (; term, prompt, istate, pstate)
 end
 

stdlib/REPL/src/History/search.jl

@@ -8,12 +8,15 @@ Launch the interactive REPL history search interface.
 Spawns prompt and display tasks, waits for user confirm or abort,
 and returns the final selection (if any).
 """
-function runsearch(histfile::HistoryFile, term, prefix::String = "\e[90m")
+function runsearch(histfile::HistoryFile, term, prefix::String = "\e[90m", initial_query::String = "")
     update!(histfile)
     events = Channel{Symbol}(Inf)
-    pspec = create_prompt(events, term, prefix)
+    pspec = create_prompt(events, term, prefix, initial_query)
     ptask = @spawn runprompt!(pspec, events)
     dtask = @spawn run_display!(pspec, events, histfile.records)
+    if !isempty(initial_query)
+        push!(events, :edit)
+    end
     wait(ptask)
     fullselection(fetch(dtask))
 end

stdlib/REPL/src/LineEdit.jl

@@ -2700,14 +2700,15 @@ function history_search(mistate::MIState)
     mimode = mode(mistate)
     mimode.hist.last_mode = mimode
     mimode.hist.last_buffer = copy(buffer(mistate))
+    initial_query = input_string(state(mistate))
     mistate.mode_state[mimode] =
         deactivate(mimode, state(mistate), termbuf, term)
     prefix = if mimode.prompt_prefix isa Function
         mimode.prompt_prefix()
     else
         mimode.prompt_prefix
     end
-    result = histsearch(mimode.hist.history, term, prefix)
+    result = histsearch(mimode.hist.history, term, prefix, initial_query)
     mimode = if isnothing(result.mode)
         mistate.current_mode
     else
@@ -2720,7 +2721,10 @@ function history_search(mistate::MIState)
     mistate.current_mode = mimode
     activate(mimode, state(mistate, mimode), termbuf, term)
     commit_changes(term, termbuf)
-    edit_insert(pstate, result.text)
+    if !isempty(result.text)
+        edit_clear(buffer(pstate))
+        edit_insert(pstate, result.text)
+    end
     refresh_multi_line(mistate)
     nothing
 end