如何从 shell 脚本中确认 aws cloudformation validate-template 命令？

Question

I want to validate cloud formation template from shell script.

I use aws cloudformation validate-tempate command:

aws cloudformation validate-template --template-body file://template.yaml

But the output of the command is a colon (:) that wait for a confirmation after execution. How can I confirm it and check the status code of a command?

I tried yes command but it did not work:

yes q | aws cloudformation validate-template --template-body file://template.yaml

Answer 1

I can't reproduce the column (:) behavior you describing. Here is the expected output and status code check.

aws cloudformation validate-template --template-body file://good-template.yaml
... dump of the template
echo $?
0 //status is OK

aws cloudformation validate-template --template-body file://bad-template.yaml
An error occurred (ValidationError) when calling the ValidateTemplate operation: Template format error: JSON not well-formed. (line 615, column 1)
echo $?
255 //status is error

Answer 2

aws cloudformation validate-template doesn't validate much. I'd recommend trying the CloudFormation Linter , which will catch many more issues before deploying. The Visual Studio Code extension can show all of those errors inline while authoring templates as well