问题
I am getting crazy to achieve this very simple task.
I need to set an Output Variable in an Azure CLI task on Visual Studio Team Services, because next task in the Release definition will be executed according to the value of this variable.
I wrote this simple code
call az extension add --name azure-cli-iot-ext
call echo ##vso[task.setvariable variable=iotEdgeExists;]$(az iot hub query -n $(iotHub) -q "select * from devices.modules where devices.deviceId ='$(iotEdge)'")
which works, but not as exepected, in fact when I read the Ouput Variable in the next Azure CLI task and I try to print it on the screen I get the command string instead of the output...
call echo"$(az iot hub query -n <IOT_HUB> -q "select * from devices.modules where devices.deviceId ='<IOT_EDGE>'")"
What am I doing wrong?
回答1:
Refer to this code below:
call {your command}>tmpFile1
set /p myvar= < tmpFile1
echo "##vso[task.setvariable variable=testvar;]%myvar%"
or
FOR /F "tokens=* USEBACKQ" %%F IN (`{your command}`) DO (
SET var=%%F
)
echo "##vso[task.setvariable variable=testvar;]%var%"
Mechaflash's answer in How to set commands output as a variable in a batch file
回答2:
If using Azure CLI version 2.*, you can use a powershell command rather than batch script wizardry. Microsoft's documentation found here
For example if you needed access token to update azure database it would look like so:
$token= & az account get-access-token --resource=https://database.windows.net --query accessToken
Write-Output("##vso[task.setvariable variable=sqlToken;]$token")
回答3:
Inspired from the answer above but with some variation.
Works in an Azure CLI task on a Hosted Ubuntu agent in Microsoft DevOps as of July 2019.
This example runs an az command to fetch the full resource name of a storage account and sets it in the variable _StorageAccountNameVar for use in another pipeline task.
myvar=`az storage account list -g MyResourceGroup --query "[?contains(name, 'config')].name" -o tsv`
echo $myvar
echo "##vso[task.setvariable variable=_StorageAccountNameVar;]$myvar"
来源：https://stackoverflow.com/questions/49282998/set-output-variable-in-azure-cli-task-on-vsts