How to check if programm installed with cmd

Question

@echo off 
color 06
title created by AAIE
@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "[System.Net.ServicePointManager]::SecurityProtocol = 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"
choco install youtube-dl
set /p input="Enter Link For Playlist:" 
set /p index="Enter Index For videos Seprated by ',':"
mkdir playlist_videos
cd playlist_videos
youtube-dl --playlist-items %index% %input%

how can I check if choco or youtube_dl is installed in windows or not or the main question what is the conditions i need to check if it true then use commands directly if not installed then it will install them and use the same commands

if for instance choco is in the path, you can do where choco. If it is not in path, then you'll need to recursively search for it which can take a little longer where /R %systemroot% choco.exe — user7818749
– user7818749, Commented Dec 2, 2021 at 13:05
i don't want to ask i user i want to check automaticly when run batch file if choco and youtube-dl is install if not install them so how can i dont that @KJ — Golden_hacker_1
– Golden_hacker_1, Commented Dec 2, 2021 at 13:07
@Gerhard but how can i check if this file exist what should type in batch file i know the command now but how should i check if it return true or false in batch file — Golden_hacker_1
– Golden_hacker_1, Commented Dec 2, 2021 at 13:12
@KJ i know what you mean but i need it work fast not ask user about anything just work — Golden_hacker_1
– Golden_hacker_1, Commented Dec 2, 2021 at 13:13
here's an example using conditional operators. (where choco)>nul 2>&1 && echo Choco installed || echo Choco not installed — user7818749
– user7818749, Commented Dec 2, 2021 at 13:20

score 1 · Accepted Answer · 2021-12-02 13:49:17Z

1

Here are some examples using where to locate and perform actions based on the result:

@echo off
(where choco.exe)>nul 2>&1
if errorlevel 1 (
    echo Choco not installed. Installing now..
    @"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "[System.Net.ServicePointManager]::SecurityProtocol = 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"
)

choco install youtube-dl
set /p input="Enter Link For Playlist:" 
set /p index="Enter Index For videos Seprated by ',':"
mkdir playlist_videos
cd playlist_videos
youtube-dl --playlist-items %index% %input%

or by using conditional operators:

@echo off
(where choco.exe)>nul 2>&1 && goto :installed || goto :install
:install
@"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "[System.Net.ServicePointManager]::SecurityProtocol = 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"

:installed
choco install youtube-dl
set /p input="Enter Link For Playlist:" 
set /p index="Enter Index For videos Seprated by ',':"
mkdir playlist_videos
cd playlist_videos
youtube-dl --playlist-items %index% %input%

Note these are straight forward examples, there are no error handling built in, like what happens if coco install fails, etc.

As per your question on 2>&1 >nul

stdout (seen as 1> when redirecting) is the output stream of a command where stderr (seen as 2> when redirecting.)

When doing >nul or > file.txt we are effectively redirecting the output of a command to nul (not seen on console) or to a file (logging purpose) but not everything goes to the stdout stream by default. so we need to redirect stderr stream to stdout, then redirect stdout to nul or a file.

You can obviously also redirect independently.

commandname 1>out.log 2>error.log

edited Dec 2, 2021 at 13:49

answered Dec 2, 2021 at 13:32

user7818749

Sign up to request clarification or add additional context in comments.

3 Comments

Golden_hacker_1 Over a year ago

but what &1 and 2 represent in this code ?? @Gerhard

user7818749 Over a year ago

exactly what I said. We are redirecting the output of the where command to nul so that it is not displayed in the console. We don't want to see that, we simply want to know if it is installed or not.

Golden_hacker_1 Over a year ago

thanks a lot for your help now i understand sorry for wasting your time @Gerhard

Collectives™ on Stack Overflow

How to check if programm installed with cmd

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related