[FL-3956] CLI autocomplete and other sugar (#4115)

* feat: FuriThread stdin

* ci: fix f18

* feat: stdio callback context

* feat: FuriPipe

* POTENTIALLY EXPLOSIVE pipe welding

* fix: non-explosive welding

* Revert welding

* docs: furi_pipe

* feat: pipe event loop integration

* update f18 sdk

* f18

* docs: make doxygen happy

* fix: event loop not triggering when pipe attached to stdio

* fix: partial stdout in pipe

* allow simultaneous in and out subscription in event loop

* feat: vcp i/o

* feat: cli ansi stuffs and history

* feat: more line editing

* working but slow cli rewrite

* restore previous speed after 4 days of debugging 🥲

* fix: cli_app_should_stop

* fix: cli and event_loop memory leaks

* style: remove commented out code

* ci: fix pvs warnings

* fix: unit tests, event_loop crash

* ci: fix build

* ci: silence pvs warning

* feat: cli gpio

* ci: fix formatting

* Fix memory leak during event loop unsubscription

* Event better memory leak fix

* feat: cli completions

* Merge remote-tracking branch 'origin/dev' into portasynthinca3/3928-cli-threads

* merge fixups

* temporarily exclude speaker_debug app

* pvs and unit tests fixups

* feat: commands in fals

* move commands out of flash, code cleanup

* ci: fix errors

* fix: run commands in buffer when stopping session

* speedup cli file transfer

* fix f18

* separate cli_shell into modules

* fix pvs warning

* fix qflipper refusing to connect

* remove temp debug logs

* remove erroneous conclusion

* Fix memory leak during event loop unsubscription

* Event better memory leak fix

* unit test for the fix

* improve thread stdio callback signatures

* pipe stdout timeout

* update api symbols

* fix f18, formatting

* fix pvs warnings

* increase stack size, hope to fix unit tests

* cli completions

* more key combos

* cli: revert flag changes

* cli: fix formatting

* cli, fbt: loopback perf benchmark

* thread, event_loop: subscribing to thread flags

* cli: signal internal events using thread flags, improve performance

* fix f18, formatting

* event_loop: fix crash

* storage_cli: increase write_chunk buffer size again

* cli: explanation for order=0

* thread, event_loop: thread flags callback refactor

* cli: increase stack size

* cli: rename cli_app_should_stop -> cli_is_pipe_broken_or_is_etx_next_char

* cli: use plain array instead of mlib for history

* cli: prepend file name to static fns

* cli: fix formatting

* cli_shell: increase stack size

* fix merge

* fix merge

* cli_shell: fix autocomplete up/down logic

* cli_shell: don't add empty line to history

* cli_shell: fix history recall

* cli_shell: find manually typed command in history

* cli_shell: different up/down completions navigation

* fix formatting

* cli_shell: fix memory leak

* cli_shell: silence pvs warning

* test_pipe: fix race condition

* storage_cli: terminate on pipe broken

---------

Co-authored-by: Georgii Surkov <georgii.surkov@outlook.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/debug/unit_tests/tests/pipe/pipe_test.c

@@ -70,10 +70,9 @@ static void on_data_arrived(PipeSide* pipe, void* context) {
 }
 
 static void on_space_freed(PipeSide* pipe, void* context) {
+    UNUSED(pipe);
     AncillaryThreadContext* ctx = context;
     ctx->flag |= TestFlagSpaceFreed;
-    const char* message = "Hi!";
-    pipe_send(pipe, message, strlen(message));
 }
 
 static void on_became_broken(PipeSide* pipe, void* context) {
@@ -119,16 +118,10 @@ MU_TEST(pipe_test_event_loop) {
     size_t size = pipe_receive(alice, buffer_1, strlen(message));
     buffer_1[size] = 0;
 
-    char buffer_2[16];
-    const char* expected_reply = "Hi!";
-    size = pipe_receive(alice, buffer_2, strlen(expected_reply));
-    buffer_2[size] = 0;
-
     pipe_free(alice);
     furi_thread_join(thread);
 
     mu_assert_string_eq(message, buffer_1);
-    mu_assert_string_eq(expected_reply, buffer_2);
     mu_assert_int_eq(
         TestFlagDataArrived | TestFlagSpaceFreed | TestFlagBecameBroken,
         furi_thread_get_return_code(thread));

applications/services/cli/application.fam

@@ -6,6 +6,7 @@ App(
     sources=[
         "cli.c",
         "shell/cli_shell.c",
+        "shell/cli_shell_completions.c",
         "shell/cli_shell_line.c",
         "cli_commands.c",
         "cli_command_gpio.c",

applications/services/cli/shell/cli_shell.c

@@ -4,6 +4,7 @@
 #include "../cli_i.h"
 #include "../cli_commands.h"
 #include "cli_shell_line.h"
+#include "cli_shell_completions.h"
 #include <stdio.h>
 #include <furi_hal_version.h>
 #include <m-array.h>
@@ -17,11 +18,13 @@
 #define ANSI_TIMEOUT_MS 10
 
 typedef enum {
+    CliShellComponentCompletions,
     CliShellComponentLine,
     CliShellComponentMAX, //<! do not use
 } CliShellComponent;
 
 CliShellKeyComboSet* component_key_combo_sets[] = {
+    [CliShellComponentCompletions] = &cli_shell_completions_key_combo_set,
     [CliShellComponentLine] = &cli_shell_line_key_combo_set,
 };
 static_assert(CliShellComponentMAX == COUNT_OF(component_key_combo_sets));
@@ -158,6 +161,8 @@ static CliShell* cli_shell_alloc(PipeSide* pipe) {
     pipe_install_as_stdio(cli_shell->pipe);
 
     cli_shell->components[CliShellComponentLine] = cli_shell_line_alloc(cli_shell);
+    cli_shell->components[CliShellComponentCompletions] = cli_shell_completions_alloc(
+        cli_shell->cli, cli_shell, cli_shell->components[CliShellComponentLine]);
 
     cli_shell->event_loop = furi_event_loop_alloc();
     cli_shell->ansi_parsing_timer = furi_event_loop_timer_alloc(
@@ -172,6 +177,7 @@ static CliShell* cli_shell_alloc(PipeSide* pipe) {
 }
 
 static void cli_shell_free(CliShell* cli_shell) {
+    cli_shell_completions_free(cli_shell->components[CliShellComponentCompletions]);
     cli_shell_line_free(cli_shell->components[CliShellComponentLine]);
 
     pipe_detach_from_event_loop(cli_shell->pipe);

applications/services/cli/shell/cli_shell_completions.c

@@ -0,0 +1,362 @@
+#include "cli_shell_completions.h"
+
+ARRAY_DEF(CommandCompletions, FuriString*, FURI_STRING_OPLIST); // -V524
+#define M_OPL_CommandCompletions_t() ARRAY_OPLIST(CommandCompletions)
+
+struct CliShellCompletions {
+    Cli* cli;
+    CliShell* shell;
+    CliShellLine* line;
+    CommandCompletions_t variants;
+    size_t selected;
+    bool is_displaying;
+};
+
+#define COMPLETION_COLUMNS        3
+#define COMPLETION_COLUMN_WIDTH   "30"
+#define COMPLETION_COLUMN_WIDTH_I 30
+
+/**
+ * @brief Update for the completions menu
+ */
+typedef enum {
+    CliShellCompletionsActionOpen,
+    CliShellCompletionsActionClose,
+    CliShellCompletionsActionUp,
+    CliShellCompletionsActionDown,
+    CliShellCompletionsActionLeft,
+    CliShellCompletionsActionRight,
+    CliShellCompletionsActionSelect,
+    CliShellCompletionsActionSelectNoClose,
+} CliShellCompletionsAction;
+
+typedef enum {
+    CliShellCompletionSegmentTypeCommand,
+    CliShellCompletionSegmentTypeArguments,
+} CliShellCompletionSegmentType;
+
+typedef struct {
+    CliShellCompletionSegmentType type;
+    size_t start;
+    size_t length;
+} CliShellCompletionSegment;
+
+// ==========
+// Public API
+// ==========
+
+CliShellCompletions* cli_shell_completions_alloc(Cli* cli, CliShell* shell, CliShellLine* line) {
+    CliShellCompletions* completions = malloc(sizeof(CliShellCompletions));
+
+    completions->cli = cli;
+    completions->shell = shell;
+    completions->line = line;
+    CommandCompletions_init(completions->variants);
+
+    return completions;
+}
+
+void cli_shell_completions_free(CliShellCompletions* completions) {
+    CommandCompletions_clear(completions->variants);
+    free(completions);
+}
+
+// =======
+// Helpers
+// =======
+
+CliShellCompletionSegment cli_shell_completions_segment(CliShellCompletions* completions) {
+    furi_assert(completions);
+    CliShellCompletionSegment segment;
+
+    FuriString* input = furi_string_alloc_set(cli_shell_line_get_editing(completions->line));
+    furi_string_left(input, cli_shell_line_get_line_position(completions->line));
+
+    // find index of first non-space character
+    size_t first_non_space = 0;
+    while(1) {
+        size_t ret = furi_string_search_char(input, ' ', first_non_space);
+        if(ret == FURI_STRING_FAILURE) break;
+        if(ret - first_non_space > 1) break;
+        first_non_space++;
+    }
+
+    size_t first_space_in_command = furi_string_search_char(input, ' ', first_non_space);
+
+    if(first_space_in_command == FURI_STRING_FAILURE) {
+        segment.type = CliShellCompletionSegmentTypeCommand;
+        segment.start = first_non_space;
+        segment.length = furi_string_size(input) - first_non_space;
+    } else {
+        segment.type = CliShellCompletionSegmentTypeArguments;
+        segment.start = 0;
+        segment.length = 0;
+        // support removed, might reimplement in the future
+    }
+
+    furi_string_free(input);
+    return segment;
+}
+
+void cli_shell_completions_fill_variants(CliShellCompletions* completions) {
+    furi_assert(completions);
+    CommandCompletions_reset(completions->variants);
+
+    CliShellCompletionSegment segment = cli_shell_completions_segment(completions);
+    FuriString* input = furi_string_alloc_set(cli_shell_line_get_editing(completions->line));
+    furi_string_right(input, segment.start);
+    furi_string_left(input, segment.length);
+
+    if(segment.type == CliShellCompletionSegmentTypeCommand) {
+        CliCommandTree_t* commands = cli_get_commands(completions->cli);
+        for
+            M_EACH(registered_command, *commands, CliCommandTree_t) {
+                FuriString* command_name = *registered_command->key_ptr;
+                if(furi_string_start_with(command_name, input)) {
+                    CommandCompletions_push_back(completions->variants, command_name);
+                }
+            }
+
+    } else {
+        // support removed, might reimplement in the future
+    }
+
+    furi_string_free(input);
+}
+
+static size_t cli_shell_completions_rows_at_column(CliShellCompletions* completions, size_t x) {
+    size_t completions_size = CommandCompletions_size(completions->variants);
+    size_t n_full_rows = completions_size / COMPLETION_COLUMNS;
+    size_t n_cols_in_last_row = completions_size % COMPLETION_COLUMNS;
+    size_t n_rows_at_x = n_full_rows + ((x >= n_cols_in_last_row) ? 0 : 1);
+    return n_rows_at_x;
+}
+
+void cli_shell_completions_render(
+    CliShellCompletions* completions,
+    CliShellCompletionsAction action) {
+    furi_assert(completions);
+    if(action == CliShellCompletionsActionOpen) furi_check(!completions->is_displaying);
+    if(action == CliShellCompletionsActionClose) furi_check(completions->is_displaying);
+
+    char prompt[64];
+    cli_shell_line_format_prompt(completions->line, prompt, sizeof(prompt));
+
+    if(action == CliShellCompletionsActionOpen) {
+        cli_shell_completions_fill_variants(completions);
+        completions->selected = 0;
+
+        if(CommandCompletions_size(completions->variants) == 1) {
+            cli_shell_completions_render(completions, CliShellCompletionsActionSelectNoClose);
+            return;
+        }
+
+        // show completions menu (full re-render)
+        printf("\n\r");
+        size_t position = 0;
+        for
+            M_EACH(completion, completions->variants, CommandCompletions_t) {
+                if(position == completions->selected) printf(ANSI_INVERT);
+                printf("%-" COMPLETION_COLUMN_WIDTH "s", furi_string_get_cstr(*completion));
+                if(position == completions->selected) printf(ANSI_RESET);
+                if((position % COMPLETION_COLUMNS == COMPLETION_COLUMNS - 1) &&
+                   position != CommandCompletions_size(completions->variants)) {
+                    printf("\r\n");
+                }
+                position++;
+            }
+
+        if(!position) {
+            printf(ANSI_FG_RED "no completions" ANSI_RESET);
+        }
+
+        size_t total_rows = (position / COMPLETION_COLUMNS) + 1;
+        printf(
+            ANSI_ERASE_DISPLAY(ANSI_ERASE_FROM_CURSOR_TO_END) ANSI_CURSOR_UP_BY("%zu")
+                ANSI_CURSOR_HOR_POS("%zu"),
+            total_rows,
+            strlen(prompt) + cli_shell_line_get_line_position(completions->line) + 1);
+
+        completions->is_displaying = true;
+
+    } else if(action == CliShellCompletionsActionClose) {
+        // clear completions menu
+        printf(
+            ANSI_CURSOR_HOR_POS("%zu") ANSI_ERASE_DISPLAY(ANSI_ERASE_FROM_CURSOR_TO_END)
+                ANSI_CURSOR_HOR_POS("%zu"),
+            strlen(prompt) + furi_string_size(cli_shell_line_get_selected(completions->line)) + 1,
+            strlen(prompt) + cli_shell_line_get_line_position(completions->line) + 1);
+        completions->is_displaying = false;
+
+    } else if(
+        action == CliShellCompletionsActionUp || action == CliShellCompletionsActionDown ||
+        action == CliShellCompletionsActionLeft || action == CliShellCompletionsActionRight) {
+        if(CommandCompletions_empty_p(completions->variants)) return;
+
+        // move selection
+        size_t completions_size = CommandCompletions_size(completions->variants);
+        size_t old_selection = completions->selected;
+        int n_columns = (completions_size >= COMPLETION_COLUMNS) ? COMPLETION_COLUMNS :
+                                                                   completions_size;
+        int selection_unclamped = old_selection;
+        if(action == CliShellCompletionsActionLeft) {
+            selection_unclamped--;
+        } else if(action == CliShellCompletionsActionRight) {
+            selection_unclamped++;
+        } else {
+            int selection_x = old_selection % COMPLETION_COLUMNS;
+            int selection_y_unclamped = old_selection / COMPLETION_COLUMNS;
+            if(action == CliShellCompletionsActionUp) selection_y_unclamped--;
+            if(action == CliShellCompletionsActionDown) selection_y_unclamped++;
+            size_t selection_y = 0;
+            if(selection_y_unclamped < 0) {
+                selection_x = CLAMP_WRAPAROUND(selection_x - 1, n_columns - 1, 0);
+                selection_y =
+                    cli_shell_completions_rows_at_column(completions, selection_x) - 1; // -V537
+            } else if(
+                (size_t)selection_y_unclamped >
+                cli_shell_completions_rows_at_column(completions, selection_x) - 1) {
+                selection_x = CLAMP_WRAPAROUND(selection_x + 1, n_columns - 1, 0);
+                selection_y = 0;
+            } else {
+                selection_y = selection_y_unclamped;
+            }
+            selection_unclamped = (selection_y * COMPLETION_COLUMNS) + selection_x;
+        }
+        size_t new_selection = CLAMP_WRAPAROUND(selection_unclamped, (int)completions_size - 1, 0);
+        completions->selected = new_selection;
+
+        if(new_selection != old_selection) {
+            // determine selection coordinates relative to top-left of suggestion menu
+            size_t old_x = (old_selection % COMPLETION_COLUMNS) * COMPLETION_COLUMN_WIDTH_I;
+            size_t old_y = old_selection / COMPLETION_COLUMNS;
+            size_t new_x = (new_selection % COMPLETION_COLUMNS) * COMPLETION_COLUMN_WIDTH_I;
+            size_t new_y = new_selection / COMPLETION_COLUMNS;
+            printf("\n\r");
+
+            // print old selection in normal colors
+            if(old_y) printf(ANSI_CURSOR_DOWN_BY("%zu"), old_y);
+            printf(ANSI_CURSOR_HOR_POS("%zu"), old_x + 1);
+            printf(
+                "%-" COMPLETION_COLUMN_WIDTH "s",
+                furi_string_get_cstr(
+                    *CommandCompletions_cget(completions->variants, old_selection)));
+            if(old_y) printf(ANSI_CURSOR_UP_BY("%zu"), old_y);
+            printf(ANSI_CURSOR_HOR_POS("1"));
+
+            // print new selection in inverted colors
+            if(new_y) printf(ANSI_CURSOR_DOWN_BY("%zu"), new_y);
+            printf(ANSI_CURSOR_HOR_POS("%zu"), new_x + 1);
+            printf(
+                ANSI_INVERT "%-" COMPLETION_COLUMN_WIDTH "s" ANSI_RESET,
+                furi_string_get_cstr(
+                    *CommandCompletions_cget(completions->variants, new_selection)));
+
+            // return cursor
+            printf(ANSI_CURSOR_UP_BY("%zu"), new_y + 1);
+            printf(
+                ANSI_CURSOR_HOR_POS("%zu"),
+                strlen(prompt) + furi_string_size(cli_shell_line_get_selected(completions->line)) +
+                    1);
+        }
+
+    } else if(action == CliShellCompletionsActionSelectNoClose) {
+        // insert selection into prompt
+        CliShellCompletionSegment segment = cli_shell_completions_segment(completions);
+        FuriString* input = cli_shell_line_get_selected(completions->line);
+        FuriString* completion =
+            *CommandCompletions_cget(completions->variants, completions->selected);
+        furi_string_replace_at(
+            input, segment.start, segment.length, furi_string_get_cstr(completion));
+        printf(
+            ANSI_CURSOR_HOR_POS("%zu") "%s" ANSI_ERASE_LINE(ANSI_ERASE_FROM_CURSOR_TO_END),
+            strlen(prompt) + 1,
+            furi_string_get_cstr(input));
+
+        int position_change = (int)furi_string_size(completion) - (int)segment.length;
+        cli_shell_line_set_line_position(
+            completions->line,
+            MAX(0, (int)cli_shell_line_get_line_position(completions->line) + position_change));
+
+    } else if(action == CliShellCompletionsActionSelect) {
+        cli_shell_completions_render(completions, CliShellCompletionsActionSelectNoClose);
+        cli_shell_completions_render(completions, CliShellCompletionsActionClose);
+
+    } else {
+        furi_crash();
+    }
+
+    fflush(stdout);
+}
+
+// ==============
+// Input handlers
+// ==============
+
+static bool hide_if_open_and_continue_handling(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellCompletions* completions = context;
+    if(completions->is_displaying)
+        cli_shell_completions_render(completions, CliShellCompletionsActionClose);
+    return false; // process other home events
+}
+
+static bool key_combo_cr(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellCompletions* completions = context;
+    if(!completions->is_displaying) return false;
+    cli_shell_completions_render(completions, CliShellCompletionsActionSelect);
+    return true;
+}
+
+static bool key_combo_up_down(CliKeyCombo combo, void* context) {
+    CliShellCompletions* completions = context;
+    if(!completions->is_displaying) return false;
+    cli_shell_completions_render(
+        completions,
+        (combo.key == CliKeyUp) ? CliShellCompletionsActionUp : CliShellCompletionsActionDown);
+    return true;
+}
+
+static bool key_combo_left_right(CliKeyCombo combo, void* context) {
+    CliShellCompletions* completions = context;
+    if(!completions->is_displaying) return false;
+    cli_shell_completions_render(
+        completions,
+        (combo.key == CliKeyLeft) ? CliShellCompletionsActionLeft :
+                                    CliShellCompletionsActionRight);
+    return true;
+}
+
+static bool key_combo_tab(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellCompletions* completions = context;
+    cli_shell_completions_render(
+        completions,
+        completions->is_displaying ? CliShellCompletionsActionRight :
+                                     CliShellCompletionsActionOpen);
+    return true;
+}
+
+static bool key_combo_esc(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellCompletions* completions = context;
+    if(!completions->is_displaying) return false;
+    cli_shell_completions_render(completions, CliShellCompletionsActionClose);
+    return true;
+}
+
+CliShellKeyComboSet cli_shell_completions_key_combo_set = {
+    .fallback = hide_if_open_and_continue_handling,
+    .count = 7,
+    .records =
+        {
+            {{CliModKeyNo, CliKeyCR}, key_combo_cr},
+            {{CliModKeyNo, CliKeyUp}, key_combo_up_down},
+            {{CliModKeyNo, CliKeyDown}, key_combo_up_down},
+            {{CliModKeyNo, CliKeyLeft}, key_combo_left_right},
+            {{CliModKeyNo, CliKeyRight}, key_combo_left_right},
+            {{CliModKeyNo, CliKeyTab}, key_combo_tab},
+            {{CliModKeyNo, CliKeyEsc}, key_combo_esc},
+        },
+};

applications/services/cli/shell/cli_shell_completions.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <furi.h>
+#include <m-array.h>
+#include "cli_shell_i.h"
+#include "cli_shell_line.h"
+#include "../cli.h"
+#include "../cli_i.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct CliShellCompletions CliShellCompletions;
+
+CliShellCompletions* cli_shell_completions_alloc(Cli* cli, CliShell* shell, CliShellLine* line);
+
+void cli_shell_completions_free(CliShellCompletions* completions);
+
+extern CliShellKeyComboSet cli_shell_completions_key_combo_set;
+
+#ifdef __cplusplus
+}
+#endif

applications/services/cli/shell/cli_shell_line.c

@@ -65,6 +65,64 @@ void cli_shell_line_ensure_not_overwriting_history(CliShellLine* line) {
     }
 }
 
+size_t cli_shell_line_get_line_position(CliShellLine* line) {
+    return line->line_position;
+}
+
+void cli_shell_line_set_line_position(CliShellLine* line, size_t position) {
+    line->line_position = position;
+}
+
+// =======
+// Helpers
+// =======
+
+typedef enum {
+    CliCharClassWord,
+    CliCharClassSpace,
+    CliCharClassOther,
+} CliCharClass;
+
+typedef enum {
+    CliSkipDirectionLeft,
+    CliSkipDirectionRight,
+} CliSkipDirection;
+
+CliCharClass cli_shell_line_char_class(char c) {
+    if((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_') {
+        return CliCharClassWord;
+    } else if(c == ' ') {
+        return CliCharClassSpace;
+    } else {
+        return CliCharClassOther;
+    }
+}
+
+size_t
+    cli_shell_line_skip_run(FuriString* string, size_t original_pos, CliSkipDirection direction) {
+    if(furi_string_size(string) == 0) return original_pos;
+    if(direction == CliSkipDirectionLeft && original_pos == 0) return original_pos;
+    if(direction == CliSkipDirectionRight && original_pos == furi_string_size(string))
+        return original_pos;
+
+    int8_t look_offset = (direction == CliSkipDirectionLeft) ? -1 : 0;
+    int8_t increment = (direction == CliSkipDirectionLeft) ? -1 : 1;
+    int32_t position = original_pos;
+    CliCharClass start_class =
+        cli_shell_line_char_class(furi_string_get_char(string, position + look_offset));
+
+    while(true) {
+        position += increment;
+        if(position < 0) break;
+        if(position >= (int32_t)furi_string_size(string)) break;
+        if(cli_shell_line_char_class(furi_string_get_char(string, position + look_offset)) !=
+           start_class)
+            break;
+    }
+
+    return MAX(0, position);
+}
+
 // ==============
 // Input handlers
 // ==============
@@ -87,13 +145,32 @@ static bool cli_shell_line_input_cr(CliKeyCombo combo, void* context) {
 
     FuriString* command = cli_shell_line_get_selected(line);
     furi_string_trim(command);
+    if(furi_string_empty(command)) {
+        cli_shell_line_prompt(line);
+        return true;
+    }
+
     FuriString* command_copy = furi_string_alloc_set(command);
 
-    if(line->history_position > 0) {
+    if(line->history_position == 0) {
+        for(size_t i = 1; i < line->history_entries; i++) {
+            if(furi_string_cmp(line->history[i], command) == 0) {
+                line->history_position = i;
+                command = cli_shell_line_get_selected(line);
+                furi_string_trim(command);
+                break;
+            }
+        }
+    }
+
     // move selected command to the front
+    if(line->history_position > 0) {
+        size_t pos = line->history_position;
+        size_t len = line->history_entries;
         memmove(
-            &line->history[1], &line->history[0], line->history_position * sizeof(FuriString*));
-        line->history[0] = command;
+            &line->history[pos], &line->history[pos + 1], (len - pos - 1) * sizeof(FuriString*));
+        furi_string_move(line->history[0], command);
+        line->history_entries--;
     }
 
     // insert empty command
@@ -109,7 +186,7 @@ static bool cli_shell_line_input_cr(CliKeyCombo combo, void* context) {
 
     // execute command
     printf("\r\n");
-    if(!furi_string_empty(command_copy)) cli_shell_execute_command(line->shell, command_copy);
+    cli_shell_execute_command(line->shell, command_copy);
     furi_string_free(command_copy);
 
     cli_shell_line_prompt(line);
@@ -199,7 +276,57 @@ static bool cli_shell_line_input_bksp(CliKeyCombo combo, void* context) {
     return true;
 }
 
-static bool cli_shell_line_input_fallback(CliKeyCombo combo, void* context) {
+static bool cli_shell_line_input_ctrl_l(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellLine* line = context;
+    // clear screen
+    FuriString* command = cli_shell_line_get_selected(line);
+    char prompt[64];
+    cli_shell_line_format_prompt(line, prompt, sizeof(prompt));
+    printf(
+        ANSI_ERASE_DISPLAY(ANSI_ERASE_ENTIRE) ANSI_ERASE_SCROLLBACK_BUFFER ANSI_CURSOR_POS(
+            "1", "1") "%s%s" ANSI_CURSOR_HOR_POS("%zu"),
+        prompt,
+        furi_string_get_cstr(command),
+        strlen(prompt) + line->line_position + 1 /* 1-based column indexing */);
+    fflush(stdout);
+    return true;
+}
+
+static bool cli_shell_line_input_ctrl_left_right(CliKeyCombo combo, void* context) {
+    CliShellLine* line = context;
+    // skip run of similar chars to the left or right
+    FuriString* selected_line = cli_shell_line_get_selected(line);
+    CliSkipDirection direction = (combo.key == CliKeyLeft) ? CliSkipDirectionLeft :
+                                                             CliSkipDirectionRight;
+    line->line_position = cli_shell_line_skip_run(selected_line, line->line_position, direction);
+    printf(
+        ANSI_CURSOR_HOR_POS("%zu"), cli_shell_line_prompt_length(line) + line->line_position + 1);
+    fflush(stdout);
+    return true;
+}
+
+static bool cli_shell_line_input_ctrl_bksp(CliKeyCombo combo, void* context) {
+    UNUSED(combo);
+    CliShellLine* line = context;
+    // delete run of similar chars to the left
+    cli_shell_line_ensure_not_overwriting_history(line);
+    FuriString* selected_line = cli_shell_line_get_selected(line);
+    size_t run_start =
+        cli_shell_line_skip_run(selected_line, line->line_position, CliSkipDirectionLeft);
+    furi_string_replace_at(selected_line, run_start, line->line_position - run_start, "");
+    line->line_position = run_start;
+    printf(
+        ANSI_CURSOR_HOR_POS("%zu") "%s" ANSI_ERASE_LINE(ANSI_ERASE_FROM_CURSOR_TO_END)
+            ANSI_CURSOR_HOR_POS("%zu"),
+        cli_shell_line_prompt_length(line) + line->line_position + 1,
+        furi_string_get_cstr(selected_line) + run_start,
+        cli_shell_line_prompt_length(line) + run_start + 1);
+    fflush(stdout);
+    return true;
+}
+
+static bool cli_shell_line_input_normal(CliKeyCombo combo, void* context) {
     CliShellLine* line = context;
     if(combo.modifiers != CliModKeyNo) return false;
     if(combo.key < CliKeySpace || combo.key >= CliKeyDEL) return false;
@@ -220,8 +347,8 @@ static bool cli_shell_line_input_fallback(CliKeyCombo combo, void* context) {
 }
 
 CliShellKeyComboSet cli_shell_line_key_combo_set = {
-    .fallback = cli_shell_line_input_fallback,
-    .count = 10,
+    .fallback = cli_shell_line_input_normal,
+    .count = 14,
     .records =
         {
             {{CliModKeyNo, CliKeyETX}, cli_shell_line_input_ctrl_c},
@@ -234,5 +361,9 @@ CliShellKeyComboSet cli_shell_line_key_combo_set = {
             {{CliModKeyNo, CliKeyEnd}, cli_shell_line_input_end},
             {{CliModKeyNo, CliKeyBackspace}, cli_shell_line_input_bksp},
             {{CliModKeyNo, CliKeyDEL}, cli_shell_line_input_bksp},
+            {{CliModKeyNo, CliKeyFF}, cli_shell_line_input_ctrl_l},
+            {{CliModKeyCtrl, CliKeyLeft}, cli_shell_line_input_ctrl_left_right},
+            {{CliModKeyCtrl, CliKeyRight}, cli_shell_line_input_ctrl_left_right},
+            {{CliModKeyNo, CliKeyETB}, cli_shell_line_input_ctrl_bksp},
         },
 };

applications/services/cli/shell/cli_shell_line.h

@@ -24,6 +24,10 @@ void cli_shell_line_format_prompt(CliShellLine* line, char* buf, size_t length);
 
 void cli_shell_line_prompt(CliShellLine* line);
 
+size_t cli_shell_line_get_line_position(CliShellLine* line);
+
+void cli_shell_line_set_line_position(CliShellLine* line, size_t position);
+
 /**
  * @brief If a line from history has been selected, moves it into the active line
  */

applications/services/storage/storage_cli.c

@@ -321,9 +321,11 @@ static void storage_cli_write_chunk(PipeSide* pipe, FuriString* path, FuriString
             uint8_t* buffer = malloc(buffer_size);
 
             while(need_to_read) {
-                size_t read_this_time = pipe_receive(pipe, buffer, MIN(buffer_size, need_to_read));
-                size_t wrote_this_time = storage_file_write(file, buffer, read_this_time);
+                size_t to_read_this_time = MIN(buffer_size, need_to_read);
+                size_t read_this_time = pipe_receive(pipe, buffer, to_read_this_time);
+                if(read_this_time != to_read_this_time) break;
 
+                size_t wrote_this_time = storage_file_write(file, buffer, read_this_time);
                 if(wrote_this_time != read_this_time) {
                     storage_cli_print_error(storage_file_get_error(file));
                     break;