Conditions in yaml pipeline like "eq" and "ne" is not working

Question

I have created a pipeline build variable "svctag" and assigned its value to blank (empty string). Now trying to execute below script inside a job in yaml file. Every time it prints "svctag is not blank". Not sure what I am doing wrong. Please help.

- ${{ if eq('$(svctag)', '') }}:
   - script: echo 'svctag is blank'
- ${{ if ne('$(svctag)', '') }}:
   - script: echo 'svctag is not blank'

Answer 1

As I know, this format is only applied in YAML template. Now, the issue is the variable called method you are using is not correct.

You should use the format variables['svctag'] instead of $(svctag) to access the variable which declared previously while you using YAML.

So, you should change your script as

  - ${{ if eq(variables['svctag'], '') }}:
    - script: echo it is true 
  - ${{ if ne(variables['svctag'], '') }}:
    - script: echo it is false

Here is the output on my side.

---

Another solution is define svctag under parameters:

parameters:
  svctag: '' 

Then use parameters with step:

  steps:
  - ${{ if eq(parameters.svctag, '') }}:
    - script: echo it is true
  - ${{ if ne(parameters.svctag, '') }}:
    - script: echo it is false

Note: Please use parameters.svctag.