Az cli add additional new line into string output

[chinadragon0515]

For command like
az k8s-extension show
--cluster-type connectedClusters
--cluster-name $clusterName
--resource-group $groupName
--name $extensionName
--query id
--output tsv > id.txt

If we open id.txt, we can see it has string with additional new line, and this is some for other commands like az monitor related cli.

This will cause some issue when to use these output.

Expected behavior, no new line for single string output.

[ghost]

Thank you for your feedback. This has been routed to the support team for assistance.

[kairu-ms]

It seems -o tsv will add a newline at the end of output.

[kairu-ms]

This part of logic is in knack. @jiasli Could you have a look. Thanks. https://github.com/microsoft/knack/blob/d407b81d451d36c6ca1baeb3cd067a3f1275cb85/knack/output.py#L231-L258

[chinadragon0515]

this is a breaking changes and cause all the doc which has base64 encoding will not work for customer, can we make this as high priority?

[jiasli]

--output tsv outputting a value with \n has been the design of Azure CLI since its birth.

tsv stands for tab-separated values, so each item is considered a row. There is no "single string", but only list with single row. Actually during Bash variable assignment, the trailing new line is removed automatically:

$ name=$(az group show -n clitest.rg6i4hl6iakg --query name --output tsv)
$ echo -n $name; echo something more
clitest.rg6i4hl6iakgsomething more

https://www.gnu.org/software/bash/manual/bash.html#Command-Substitution

Bash performs the expansion by executing command in a subshell environment and replacing the command substitution with the standard output of the command, with any trailing newlines deleted.

You are seeing this issue because your are running Azure CLI installed on Windows via WSL:

$ which az
/mnt/c/Program Files (x86)/Microsoft SDKs/Azure/CLI2/wbin/az

This hits issue:

• When calling native application, carriage return \r in the output should be removed microsoft/WSL#7248
• Carriage return \r being appended to the output #13573

To solve it, please follow https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-linux?pivots=apt to install Azure CLI in WSL Ubuntu, so that Linux az is called:

$ which az
/usr/bin/az

[jiasli]

BTW, you may check what's actually in the variable using a very simply Python script:

$ python3 -c "import sys; print(sys.argv)" $name
['-c', 'clitest.rg6i4hl6iakg\r']

Note the \r in $name.