How to evaluate expression result with batch commands

Asked May 08 '18 at 22:34

Active May 09 '18 at 15:10

Viewed 509 times

In the batch file I wrote, I want to login to aws ecr to pull down docker images. To login, I need to run

aws ecr get-login --region=xxx

which returns

docker login {login-credential}

The actual commands to login. So I need to evaluate the result of aws ecr get-login --region=xxx.

In shell script, I can just put the expression inside ${ ... }, but how do I do this in batch file?

ps. I tried call aws ecr get-login --region=xxx, but that didn't seem to work.

asked May 08 '18 at 22:34

Anna Morning

How is this related to Windows [tag:batch-file]s? – aschipfl May 08 '18 at 23:33
Perhaps use stdin i.e. `aws ecr get-login --region=xxx < reply.txt` which reads answers from the file *reply.txt*. – michael_heath May 09 '18 at 00:09
Possible duplicate of [Batch equivalent of Bash backticks](https://stackoverflow.com/questions/2768608/batch-equivalent-of-bash-backticks) – Simone Zabberoni May 09 '18 at 15:07
thumbs up, thanks guys! I think Simone's answer might be what I'm looking for. – Anna Morning May 15 '18 at 17:28

0 Answers0