Allow passing arguments/options/flags to subtasks

[bartsmykla]

Problem

Mise doesn’t currently support passing dynamic arguments, options, or flags from a main task to its subtasks. This makes it difficult to create workflows where all subtasks share a common argument, like a policy name.

Here are possible approaches to solve this:

Inline argument substitution

["generate:policy"]
depends = [
    "generate:tools:policy-gen",
    "generate:policy:core-resources {{ arg(name='policy-name') }}",
    "generate:policy:other-resources {{ arg(name='policy-name') }}",
]

["generate:policy:core-resources"]
depends = ["generate:tools:policy-gen"]

run = """
echo "Generating core resources for {{ arg(name='policy-name') }}"
"""

["generate:policy:other-resources"]
depends = [
    "generate:tools:policy-gen",
    "generate:policy:core-resources {{ arg(name='policy-name') }}",
]

run = """
echo "Generating other resources for {{ arg(name='policy-name') }}"
"""

Automatic argument passing

["generate:policy"]
pass_args_to_depends = true  # Automatically pass arguments to subtasks

depends = ["generate:tools:policy-gen", "generate:policy:core-resources", "generate:policy:other-resources"]

["generate:policy:core-resources"]
depends = ["generate:tools:policy-gen"]

run = """
echo "Generating core resources for {{ arg(name='policy-name') }}"
"""

["generate:policy:other-resources"]
depends = ["generate:tools:policy-gen", "generate:policy:core-resources"]

run = """
echo "Generating other resources for {{ arg(name='policy-name') }}"
"""

Using environment variables from parent task

["generate:policy"]
env.POLICY_NAME = "{{ arg(name='policy-name') }}"

depends = ["generate:tools:policy-gen", "generate:policy:core-resources", "generate:policy:other-resources"]

["generate:policy:core-resources"]
depends = ["generate:tools:policy-gen"]

run = """
echo "Generating core resources for {{ env.POLICY_NAME }}"
"""

["generate:policy:other-resources"]
depends = ["generate:tools:policy-gen", "generate:policy:core-resources"]

run = """
echo "Generating other resources for {{ env.POLICY_NAME }}"
"""

Expected Behavior

When running:

mise run generate:policy circuit-breaker

All subtasks should receive the circuit-breaker argument. Expected output:

Generating core resources for circuit-breaker
Generating other resources for circuit-breaker

Benefits

• Makes workflows easier by reducing repeated code when subtasks use the same arguments
• Lets you pass arguments dynamically to adjust subtask behavior
• Keeps tasks cleaner and simpler to manage

[jdx]

I don't think this is necessary. You can just set an environment variable like this:

[tasks."generate:policy"]
run = "POLICY_NAME=circuit-breaker mise run generate:tools:policy-gen ::: generate:policy:core-resources ::: generate:policy:other-resources"