uv plugin rewrites non-python shebangs
Metadata
Current evaluation
uv plugin rewrites all executable shebangs, corrupting staged package scripts such as dpkg-maintscript-helper; valid bug with clear reproducer, no fix yet.
Suggested action: keep open
Reason: The issue is a valid, clearly scoped bug: rockcraft/plugins/uv_plugin.py uses `sed -i "1 s|^#\!.*$|...|"`, which rewrites every executable's shebang, unlike craft-parts' base implementation that restricts rewriting to `PARTS_PYTHON_VENV_INTERP_PATH`. The reproducer and log show `/usr/bin/dpkg-maintscript-helper` rewritten to `#!/bin/python3`, causing dpkg failures.
Evaluated by: mr-cal-bot
Impact:
70
Quick Win:
42
Complexity:
25
Confidence:
85
Actionability:
80
Issue body
### Bug Description
The `uv` plugin rewrites shebangs for all scripts. It unintentionally modifies scripts included by staged packages.
This is a problem because the uv plugin needs `python3-venv` as a stage package, which brings in dpkg-related shell scripts.
It's also a problem if another part includes stage packages with similar dependencies, because the contents will no longer be identical and they will conflict.
### To Reproduce
Build a rock using the uv plugin that calls `apt install`.
See [here](https://github.com/mr-cal/rockcraft/commit/f0a4fc85edec43e4ce39a90f12b0a9ad534a87eb) for a reproducer.
### Environment
rockcraft 1.11.0
### rockcraft.yaml
```yaml
name: test-uv
base: ubuntu@24.04
version: '0.1'
summary: hello
description: hello
platforms:
amd64:
parts:
test-uv:
plugin: uv
source: src
build-snaps:
- astral-uv
stage-packages:
- python3-venv
```
### Relevant log output
```shell
> docker run --rm plugin-uv exec test-uv
...
Selecting previously unselected package linux-libc-dev:amd64.
Preparing to unpack .../64-linux-libc-dev_6.8.0-60.63_amd64.deb ...
Unpacking linux-libc-dev:amd64 (6.8.0-60.63) ...
Selecting previously unselected package libcrypt-dev:amd64.
Preparing to unpack .../65-libcrypt-dev_1%3a4.4.36-4build1_amd64.deb ...
File "/usr/bin/dpkg-maintscript-helper", line 63
preinst)
^
SyntaxError: closing parenthesis ')' does not match opening parenthesis '[' on line 45
dpkg: error processing archive /tmp/apt-dpkg-install-YeVPuW/65-libcrypt-dev_1%3a4.4.36-4build1_amd64.deb (--unpack):
new libcrypt-dev:amd64 package pre-installation script subprocess returned error exit status 1
File "/usr/bin/dpkg-maintscript-helper", line 63
preinst)
^
SyntaxError: closing parenthesis ')' does not match opening parenthesis '[' on line 45
dpkg: error while cleaning up:
new libcrypt-dev:amd64 package post-removal script subprocess returned error exit status 1
Selecting previously unselected package rpcsvc-proto.
Preparing to unpack .../66-rpcsvc-proto_1.4.2-0ubuntu7_amd64.deb ...
Unpacking rpcsvc-proto (1.4.2-0ubuntu7) ...
Selecting previously unselected package libc6-dev:amd64.
Preparing to unpack .../67-libc6-dev_2.39-0ubuntu8.4_amd64.deb ...
Unpacking libc6-dev:amd64 (2.39-0ubuntu8.4) ...
Selecting previously unselected package libheif-plugin-aomenc:amd64.
Preparing to unpack .../68-libheif-plugin-aomenc_1.17.6-1ubuntu4.1_amd64.deb ...
Unpacking libheif-plugin-aomenc:amd64 (1.17.6-1ubuntu4.1) ...
Selecting previously unselected package manpages-dev.
Preparing to unpack .../69-manpages-dev_6.7-2_all.deb ...
Unpacking manpages-dev (6.7-2) ...
Errors were encountered while processing:
/tmp/apt-dpkg-install-YeVPuW/25-cpp_4%3a13.2.0-7ubuntu1_amd64.deb
/tmp/apt-dpkg-install-YeVPuW/27-fonts-dejavu-core_2.37-8_all.deb
/tmp/apt-dpkg-install-YeVPuW/28-fontconfig-config_2.15.0-1.1ubuntu2_amd64.deb
/tmp/apt-dpkg-install-YeVPuW/65-libcrypt-dev_1%3a4.4.36-4build1_amd64.deb
> docker run --rm test-uv exec head -n5 /usr/bin/dpkg-maintscript-helper
#!/bin/python3
#
# Copyright © 2007, 2011-2015 Guillem Jover <guillem@debian.org>
# Copyright © 2010 Raphaël Hertzog <hertzog@debian.org>
# Copyright © 2008 Joey Hess <joeyh@debian.org>
```
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| ~deepseek/deepseek-pro-latest |
Impact:
70
Quick Win:
42
Complexity:
25
Confidence:
85
Actionability:
80
|
keep open | uv plugin rewrites all executable shebangs, corrupting staged package scripts such as dpkg-maintscript-helper; valid bug with clear reproducer, no fix yet. | |
| qwen/qwen3.6-35b-a3b |
Impact:
70
Quick Win:
34
Complexity:
40
Confidence:
80
Actionability:
80
|
keep open | uv plugin rewrites shebangs for all executable files, corrupting non-Python shell scripts from stage-packages like dpkg-maintscript-helper | |
| qwen/qwen3.8-27b |
Impact:
55
Quick Win:
33
Staleness:
75
Complexity:
40
Confidence:
70
Support Request:
5
|
needs triage | uv plugin rewrites shebangs on all executable files (including non-Python shell scripts from stage packages), breaking dpkg maintainer scripts. Bug still present in code; no maintainer response or labels in 460 days. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
90
Complexity:
40
Confidence:
85
Support Request:
5
|
needs triage | The uv plugin incorrectly rewrites non-Python shebangs in staged packages, causing script execution errors. The report lacks labels and maintainer response, remaining unassessed for over a year. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
95
Complexity:
40
Confidence:
85
Support Request:
10
|
needs triage | The uv plugin incorrectly rewrites shebangs for non-Python scripts, breaking staged packages like python3-venv. Unassessed, no maintainer comments or labels after over a year. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
95
Complexity:
45
Confidence:
85
Support Request:
5
|
close stale | The uv plugin incorrectly rewrites shebangs for non-Python scripts, breaking dpkg-related shell scripts. The issue remains unlabelled and has been inactive for over a year with no maintainer response. |
Update history
No update history recorded yet.
Related work
-
Related To:
canonical/snapcraft#680
(confidence 70%)
Historical snapcraft PR for Python plugin shebang rewriting; relevant context but not a fix for the uv plugin bug.
Related issues
No related issues found above the similarity threshold.