sway exec 与 cli 中的相同命令执行的操作不同

Question

我编写了一个Python程序来处理使用notify-send向dunst发送通知。我知道有更好的选择，但我想自己做。 这是我的程序，位于 /home/theo/Repos/volumebar-dunst

import os
import json
import time
import sys

global name, standard_ttl, standard_ttl_s
data_path = 'data.json'
name = 'Volume Control'
standard_ttl = 1000
standard_ttl_s = standard_ttl / 1000

def get_timestanp():
    return int(round(time.time(), 0))

def get_volume_master():
    command = 'awk -F"[][]" \'/Left:/ { print $2 }\' <(amixer sget Master)'
    return os.popen(f'{command}').read().strip()

def get_if_muted():
    command = "amixer get Master | grep 'Left:' | awk -F'[][]' '{print $4}'"
    returnstate =  os.popen(command).read().strip()
    if returnstate == "off":
        return True
    else:
        return False

def data_exists(data_path):
    if not os.path.exists(data_path):
        data = {"message" : {"last_called" : get_timestanp(), "last_message_id" : 0, "volume" : get_volume_master()},
                "mute" : {"state" : get_if_muted()}}
        save_data(data)

def save_data(data):
    with open('data.json', 'w') as file:
        json.dump(data, file)

def load_data(data_path):
    data_exists(data_path)
    with open(data_path, 'r') as file:
        return json.load(file)

def cli_command(command):
    return os.popen(f'{command}').read().strip()

def notify(message="No message provided.", id=0, ttl=standard_ttl):
    return_data = os.popen(f'notify-send -t {ttl} -r {id} -p "{name}" "{message}"').read().strip()
    print(return_data)
    return return_data

def main():
    args = sys.argv
    data = load_data(data_path)
    if len(args) == 1:
       notify("Error: No arguments provided. Please provide an argument.")
       return
    
    # check if the argument is valid
    if not (args[1] == "raise" or args[1] == "lower" or args[1] == "mute"):
        notify("Error: Invalid argument provided. Please provide a valid argument.")
        return
    
    # do if argument raise
    if args[1] == "raise":
        cli_command(f'amixer set Master {args[2]}+')

        if get_timestanp() - data['message']['last_called'] <= standard_ttl_s:
            return_data = notify(f'Volume raised from {data["message"]["volume"]} to {get_volume_master()}', data['message']['last_message_id'])
        else:
            return_data = notify(f'Volume raised from {data["message"]["volume"]} to {get_volume_master()}')
        # update the data
        data['message']['volume'] = get_volume_master()
        data['message']['last_message_id'] = return_data.strip() 
        data['message']['last_called'] = get_timestanp()
        save_data(data)

    # do if argument lower
    elif args[1] == "lower":
        cli_command(f'amixer set Master {args[2]}-')

        if get_timestanp() - data['message']['last_called'] <= standard_ttl_s:
            return_data = notify(f'Volume lowered from {data["message"]["volume"]} to {get_volume_master()}', data['message']['last_message_id'])
        else:
            return_data = notify(f'Volume lowered from {data["message"]["volume"]} to {get_volume_master()}')
        # update the data
        data['message']['volume'] = get_volume_master()
        data['message']['last_message_id'] = return_data.strip()
        data['message']['last_called'] = get_timestanp()
        save_data(data)

    # do if argument mute
    elif args[1] == "mute":
        if data['mute']['state']:
            cli_command('amixer set Master unmute')
            
            if (get_timestanp() - data['message']['last_called'] <= standard_ttl_s):
                return_data = notify('Unmuted', data['message']['last_message_id'])
            else:
                return_data = notify('Unmuted')

            # update the data
            data['message']['last_message_id'] = return_data.strip()
            data['mute']['state'] = False
            data['message']['last_called'] = get_timestanp()
            save_data(data)
        elif not data['mute']['state']:
            cli_command('amixer set Master mute')
            
            if (get_timestanp() - data['message']['last_called'] <= standard_ttl_s):
                return_data = notify('Muted', data['message']['last_message_id'])
            else:
                return_data = notify('Muted')

            # update the data
            data['message']['last_message_id'] = return_data.strip()
            data['mute']['state'] = True
            data['message']['last_called'] = get_timestanp()
            save_data(data)
        else:
            notify("Error: Something went wrong.")

main()

当我从命令行运行程序时，例如：

/home/theo/Repos/volumebar-dunst/bin/python /home/theo/Repos/volumebar-dunst/main.py raise 10%

会弹出一条通知，说明应该说什么。 但是如果我尝试使用

home/theo/.config/sway/config

中设置的按键绑定来触发它，即：

    # sound
    # amixer set Master 10%+
    bindsym XF86AudioRaiseVolume exec "/home/theo/Repos/volumebar-dunst/bin/python /home/theo/Repos/volumebar-dunst/main.py raise 10%"
    # amixer set Master 10%-
    bindsym XF86AudioLowerVolume exec "/home/theo/Repos/volumebar-dunst/bin/python /home/theo/Repos/volumebar-dunst/main.py lower 10%"
    # amixer set Master mute/unmute 
    bindsym XF86AudioMute exec "/home/theo/Repos/volumebar-dunst/bin/python /home/theo/Repos/volumebar-dunst/main.py mute"

它只是到达 python 脚本的一部分，其中向 cli 发送命令，例如使用 raise 来提高音量

    # do if argument raise
    if args[1] == "raise":
        cli_command(f'amixer set Master {args[2]}+')

此后似乎出现错误或只是退出程序。但最后的调整仍然进行。 令我不安的是，我和 sway 执行的同一个命令似乎做了不同的事情，我不明白为什么。

为了尝试解决这个问题，我尝试记录 sway 执行的程序的行为，并且它会发送通知，直到执行

cli_command(f'amixer set Master {args[2]}+')

为止。之后程序似乎崩溃了。不幸的是我在网上没有找到任何相关信息。

Answer 1

错误只是，sway 在 /home/theo 中运行命令，并且 data.json 文件保存在 /home/theo/Repos/volumebar-control 中。通过将 swayconfig 中的命令设置为：

bindsym examplekey exec "cd /home/theo/Repos/volumebar-control && bin/python main.py

，脚本将在正确的目录中执行，并找到 data.json 文件。