Files
fleet/changes/41470-python-script-only-followups
Carlo a442d7af3a Python script-only packages: follow-on QA fixes (#50143)
**Related issues:** Resolves #50068, Resolves #50106, Resolves #50107,
Resolves #50108, Resolves #50110, Resolves #50114

Follow-on fixes from QA of #41470 (Python script-only packages):

- Software-installer validation errors are action-neutral, so the Add
and Edit flows each show the correct single verb, and the
unsupported-file error names a content/format mismatch instead of
blaming the extension (#50068, #50107).
- `.py` packages accept `setup_experience_platform` (`darwin`/`linux`),
matching `.sh` (#50106).
- A failed-to-run install script (exit code `-1`) now renders a
diagnostic instead of empty output, and orbit surfaces the underlying
execve error (#50108).
- The install-rejection message for `.sh`/`.py` packages says "macOS and
Linux hosts" instead of "linux" (#50110).
- Orbit writes each script's temp file with an extension matching its
shebang (`.py`/`.sh`/`.ps1`), so tracebacks reference the right file
type (#50114).

# Checklist for submitter

- [x] Changes file added for user-visible changes in `changes/`.

## Testing

- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually

## fleetd/orbit/Fleet Desktop

- [x] If the change applies to only one platform, confirmed that
`runtime.GOOS` is used as needed to isolate changes.
- [x] Verified compatibility with the latest released version of Fleet
(orbit-only change; the server↔agent `SoftwareInstallDetails` contract
is unchanged).


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Improved installer validation and rejection messaging for
unsupported/invalid package contents (including correcting “add” vs
“edit” wording and avoiding duplicated phrasing).
* Added clearer diagnostics when install scripts fail to start
(including empty output cases).
* Corrected handling of script-only packages so Python scripts use the
proper script type/extension, reducing misleading tracebacks.
* Updated platform availability messaging so `.sh`/`.py` packages
display macOS+Linux support.
* **New Features**
* Python script-only packages can now specify macOS and Linux setup
experience platforms.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-07-30 14:40:24 -04:00

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- Fixed the "Add software" error for a file whose contents don't match a supported installer format — it no longer says "Couldn't edit software" on an add and no longer implies the file extension is the problem.
- Fixed software installer validation errors reporting the wrong action verb (add vs. edit).
- Allowed `.py` script-only packages to be assigned a `setup_experience_platform` (`darwin` or `linux`), matching `.sh`.
- Added a diagnostic message when an install script can't be run (exit code -1) — e.g. when the interpreter in its shebang is missing on the host — instead of reporting no output.
- Fixed the install rejection message for `.sh`/`.py` script packages to say they can be installed on macOS and Linux hosts, rather than Linux only.
- Fixed `.py` package install scripts being written to the host with a `.sh` extension, which produced misleading Python tracebacks.