can_wizard/main/console_task.c

#include "console_task.h"
#include <stdio.h>
#include <string.h>
#include "esp_system.h"
#include "linenoise/linenoise.h"
#include "esp_log.h"
#include "esp_console.h"
#include "fs.h"
#include "esp_err.h"

#define PROMPT_STR "[root@can_wiz ~]$ "

static const char* TAG = "console task";


void console_task(void* arg) {
    
    /* Prompt to be printed before each line.
     * This can be customized, made dynamic, etc.
     */
    const char* prompt = LOG_COLOR_E PROMPT_STR LOG_RESET_COLOR;

    printf("\n"
           "Type 'help' to get the list of commands.\n"
           "Use UP/DOWN arrows to navigate through command history.\n"
           "Press TAB when typing command name to auto-complete.\n"
           "Ctrl+C will terminate the console environment.\n");

    /* Figure out if the terminal supports escape sequences */
    int probe_status = linenoiseProbe();
    if (probe_status) { /* zero indicates success */
        printf("\n"
               "Your terminal application does not support escape sequences.\n"
               "Line editing and history features are disabled.\n"
               "On Windows, try using Putty instead.\n");
        linenoiseSetDumbMode(1);
#if CONFIG_LOG_COLORS
        /* Since the terminal doesn't support escape sequences,
         * don't use color codes in the prompt.
         */
        prompt = PROMPT_STR;
#endif // CONFIG_LOG_COLORS
    }

    
    /* Main loop */
    while (true) {
        /* Get a line using linenoise.
         * The line is returned when ENTER is pressed.
         */
        char* line = linenoise(prompt);
        if (line == NULL) { /* Break on EOF or error */
            break;
        }
        /* Add the command to the history if not empty*/
        if (strlen(line) > 0) {
            linenoiseHistoryAdd(line);
            /* Save command history to filesystem */
            linenoiseHistorySave(HISTORY_PATH);
        }

        /* Try to run the command */
        int ret;
        esp_err_t err = esp_console_run(line, &ret);
        if (err == ESP_ERR_NOT_FOUND) {
            printf("Unrecognized command\n");
        } else if (err == ESP_ERR_INVALID_ARG) {
            // command was empty
        } else if (err == ESP_OK && ret != ESP_OK) {
            printf("Command returned non-zero error code: 0x%x (%s)\n", ret, esp_err_to_name(ret));
        } else if (err != ESP_OK) {
            printf("Internal error: %s\n", esp_err_to_name(err));
        }
        /* linenoise allocates line buffer on the heap, so need to free it */
        linenoiseFree(line);
    }

    ESP_LOGE(TAG, "Error or end-of-input, terminating console");
    esp_console_deinit();
}