命令 output 设置为变量

Question

I've been trying to make a script that installs the current nvidia driver, I've gone pretty far but there's one thing missing

I'm trying to use nvidia-smi to find the driver version and here's the command output

C:\>nvidia-smi --query-gpu=driver_version --format=csv
driver_version
457.30

I've been trying to set 457.30 in %driver% here's what I got so far

FOR /F "tokens=* skip=1" %%g IN ('nvidia-smi --query-gpu=driver_version --format=csv') do (SET "driver=%%g")

I also tried a combination with findstr but that ended up being a disaster

for /F "tokens=* skip=1" %%g in ('nvidia-smi --query-gpu=driver_version --format=csv ^| findstr "."') do set driver=%%g

In any case, %%g and %driver% return as empty .

echo %driver% 

returns

C:\>echo
ECHO is on.

Any ideas?

Thank you for your cooperation.

Answer 1

Your variable isn't getting set because right now your nvidia-smi command is throwing an error (to stdout, curiously) but skip=1 is skipping over it so there's nothing left to set the variable to.

= is one of the default delimiters for strings and so both of the = symbols in your command need to be escaped for your query to be executed correctly.

@echo off
for /F "delims=" %%g IN ('nvidia-smi --query-gpu^=driver_version --format^=csv ^| find "."') do set "driver=%%g"
echo %driver%