find all S3 objects without tags

Question

Hello,  
  
Considering the following Windows 10 bash command from a .bat file (using AWS CLI), that finds all the S3 keys for specified (tagKey,tagValue), could you please specify the command to get all the S3 keys without any tag ?  
```
for /f "tokens=*" %%a in ('aws s3api list-objects-v2 --bucket  --prefix  --no-cli-auto-prompt --query Contents[*].[Key] --output text') do (
	for /f "tokens=*" %%b in ('aws s3api get-object-tagging --bucket  --key %%a --no-cli-auto-prompt --query TagSet[?"Key==''&&Value==''"].Key --output text') do (
		@echo %%a >> 
	)
)
```
Thank you,  
Mihai ADAM

Answer

Please see the more clear syntax
```
for /f "tokens=*" %%a in ('aws s3api list-objects-v2 --bucket  --prefix  --no-cli-auto-prompt --query Contents[*].[Key] --output text') do (
	for /f "tokens=*" %%b in ('aws s3api get-object-tagging --bucket  --key %%a --no-cli-auto-prompt --query "TagSet[0]==null" --output text') do (
		if %%b==True @echo %%a >> 
	)
)
```

Answer

If you want to test if object doesn't have any tags you can test if TagSet[0] is null.

```
% aws s3api get-object-tagging --bucket BUCKET --key OBJECT
{
    "TagSet": []
}
% aws s3api get-object-tagging --bucket BUCKET --key OBJECT --query 'TagSet[0]==`null`'
true
```

As your original script was listing all the tag, but now you'd only want to list object name when there is no tags, you can replace inner for -loop with simple if -cmd than will print object name (%%a) when above cmd return true. Not being Windows professional I will leave the syntax of script for you as an exercise ;-)

find all S3 objects without tags

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