feat(run): support -- separator to pass extra args to typed-arg tasks#5569
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ruben-arts merged 9 commits intoprefix-dev:mainfrom Mar 3, 2026
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When a task defines typed `args`, all CLI values are matched against
those definitions and any extras caused a `TooManyArguments` error.
This adds support for the standard `--` separator: everything after
`--` is forwarded verbatim to the underlying command, regardless of
the task's `args` definition.
pixi run pytest tests/unit -- -v --tb=short --maxfail=5
For tasks without typed args (FreeFormArgs), `--` is preserved and
passed through unchanged so programs that use `--` themselves
(e.g. `git log -- somefile`) continue to work.
Implementation:
- Add `ArgValues::TypedArgsWithExtra(Vec<TypedArg>, Vec<String>)` variant
to represent typed args combined with extra passthrough args
- Parse `--` separator in `TaskGraph::from_cmd_args` before arg resolution
- Update script generation in `ExecutableTask` to append extra args
- Add four unit tests covering the new behaviour
- Document the feature in the CLI reference and advanced tasks guide
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
… task name or arg
Hofer-Julian
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Mar 3, 2026
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Hofer-Julian
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The docs weren't completely accurate and I found some small improvements in the code.
Looks great to me, awesome work Ruben!
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Description
Before we wouldn't be able to tell things to a task with args anymore, this PR would allow for users to use the
--to tell pixi to split it up and still allow the trailing args like normal. e.g.:pixi run test -- -v --tb=short --maxfail=5The logic is:
If the run command is a pixi task, split of the first
--and use everything behind that as trailing args.If the run command is not a pixi task, forward the
--to the command.Related: #4208
How Has This Been Tested?
Tested it locally.
AI Disclosure
Tools: Claude
Checklist:
schema/model.py.