how to increment and save variable in azure devops pipeline

Question

Anyone know how can I increment the value of a variable under some conditions, (for example only if the pipeline succeeded) and save it for next build?

Example:
I set a variable: number=5.
If the pipeline succeeded and job number 2 ran, I want number=6 on the next build.

Is this possible?

Please explain what you are trying to accomplish by doing this. — Daniel Mann, Jul 25 '22 at 19:57
Increment version - I need to increase the last digit of the version, but only if the pipeline succeeded, so cannot use counter. — Linux Dev, Jul 25 '22 at 20:24
Why not use something like GitVersion to manage generating valid semver automatically? — Daniel Mann, Jul 26 '22 at 13:13

score 0 · Accepted Answer · edited Jul 28 '22 at 01:40

0

You can set the value of your variable by using following command:

Bash

echo "##vso[task.setvariable variable=number;]newValue"

PowerShell

Write-Host "##vso[task.setvariable variable=number;]newValue"

Basically, your number will be set to the newValue after running this command.

edited Jul 28 '22 at 01:40

Jeremy Caney

7,102
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answered Jul 26 '22 at 19:33

Baris Gokcan

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1

Will this save the value of the variable for the next build? – Linux Dev Jul 27 '22 at 06:58
It does not work for me, the value is simply reset to 5 with the variable declaration in the next run. You probably need to work with git or a text file to increase the version number – Huondui Mar 30 '23 at 10:33

score -1 · Answer 2 · answered Jul 26 '22 at 02:14

how to increment and save variable in azure devops pipeline

Since you could not use the counter, you could try to use the REST API Definitions - Update to update the variable:

PUT https://dev.azure.com/{organization}/{project}/_apis/build/definitions/{definitionId}?api-version=5.0

The test scripts:

$url = "https://dev.azure.com/{organization}/{project}/_apis/build/definitions/{definitionId}?api-version=6.0"

Write-Host "URL: $url"
$pipeline = Invoke-RestMethod -Uri $url -Headers @{
    Authorization = "Bearer $env:SYSTEM_ACCESSTOKEN"
}
Write-Host "Pipeline = $($pipeline | ConvertTo-Json -Depth 100)"

$counter = [int]$pipeline.variables.Test.value

$counter++

$pipeline.variables.Test.value = $counter

####****************** update the modified object **************************
$json = @($pipeline) | ConvertTo-Json -Depth 99


$updatedef = Invoke-RestMethod -Uri $url -Method Put -Body $json -ContentType "application/json" -Headers @{Authorization = "Bearer $env:SYSTEM_ACCESSTOKEN"}

write-host "==========================================================" 
Write-host "The value of Varialbe 'Test' is updated to" $updatedef.variables.Test.value

Note: We neeed to declare the variable type as int before we can use ++

$counter = [int]$pipeline.variables.Test.value

$counter++

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how to increment and save variable in azure devops pipeline

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