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1. task-bot

   added

   state: needs triageWaiting to be triaged by a maintainer.Waiting to be triaged by a maintainer.

   on Jun 26, 2023
2. vctls commented on Oct 24, 2023

   

   vctls

   on Oct 24, 2023

   Last edited by vctls

   More actions

   Just noticed that global dynamic variables are evaluated each time a task is run.
   This can indeed become a performance problem. It could at least be documented.

   I don't see many workarounds in the meantime.
   Commands that take time should not be used in global dynamic variables but rather sub-commands or task dependencies.
   Or, you could add conditions in the expression itself. Local variables aren't available, but, for example, the TASK variable is:

   vars:
     FOO:
       sh: |-
         {{ if .TASK | contains "bar" }}sleep 2 && echo baz{{end}}

   This is kind of ugly and cumbersome, but can be used with task namespaces in order to confine the problem to the tasks that actually need that variable.
   I suppose long running command results could also be cached, when possible.
3. user2410 commented on Jun 2, 2025

   

   user2410

   on Jun 2, 2025

   More actions

   I have been using this workaround for the issue.

   version: '3'
   
   vars:
     MASTER_IP_CMD: |
       awk '/ master /{print $1}' ./machines.txt
   
   tasks:
     build:
       desc: "Build the cluster"
       cmds:
         - ...
         - vagrant up # This produces ./machines.txt
         - ...
   
     certs:gen:
       desc: "Generate certificates for components"
       vars:
         MASTER_IP:
           sh: |
             {{.MASTER_IP_CMD}}
       cmds:
         # Your commands here
   
     dist:certs:
       desc: "Distribute certificates to VMs"
       vars:
         MASTER_IP:
           sh: |
             {{.MASTER_IP_CMD}}
       cmds:
         # Your commands here

   Because the MASTER_IP variable is only available after vagrant up, resolving the global variable before running task build will result in error.
   This workaround avoids evaluating the global dynamic variable by storing the command as a plain string, deferring its execution until a task runs and actually needs it.
4. trulede

   added the

   feature

   issue type on Dec 8, 2025
5. trulede

   added

   area: variablesChanges related to variables.Changes related to variables.

   and removed

   state: needs triageWaiting to be triaged by a maintainer.Waiting to be triaged by a maintainer.

   on Dec 8, 2025
6. kota65535

   added a commit that references this issue on Sep 4, 2026

   feat(config): add cache to reuse a dynamic var output (#403)

   ...

   f2461b0