uv does not recognize dependencies declared in script

[bongomachine]

Howdy and thanks for a great piece of software! I'm not sure if this is a bug or if I'm simply doing things wrong. Anyway..

When I run the following piece of python:

# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "cyclonedds ==0.11.0",
# ]

# [tool.uv]
# index-strategy = "unsafe-best-match"

# [tool.uv.sources]
# cyclonedds = { git = "https://github.com/eclipse-cyclonedds/cyclonedds-python.git", rev = "080dfd4b26e4c4dc2529694ef9cf9589750360c1" }

# ///


import cyclonedds as dds

print("Hello, World!")

With command: CYCLONEDDS_HOME=~/.local uv -v run test.py

I get the following error:

DEBUG uv 0.3.4
DEBUG No project found; searching for Python interpreter
DEBUG Searching for Python interpreter in managed installations or system path
DEBUG Searching for managed installations at `~/.local/share/uv/python`
DEBUG Found `cpython-3.12.3-linux-x86_64-gnu` at `/usr/bin/python3` (search path)
DEBUG Using Python 3.12.3 interpreter at: /usr/bin/python3
DEBUG Running `python test.py`
Traceback (most recent call last):
  File "~/tmp/test.py", line 15, in <module>
    import cyclonedds as dds
ModuleNotFoundError: No module named 'cyclonedds'

However, if I run the following: uv venv && CYCLONEDDS_HOME=~/.local uv pip install git+https://github.com/eclipse-cyclonedds/cyclonedds-pytho n@080dfd4b26e4c4dc2529694ef9cf9589750360c1 && uv run test.py, everything works.

As stated earlier, this might be the intended behavior, but I'm not sure.

• The current uv platform.
  Linux (x86_64) Ubuntu 24.04

• The current uv version (uv --version).
  uv 0.3.4

[charliermarsh]

I agree that this should work, at least from the above description.

[zanieb]

I presume the problem here is that we're not respecting [tool.uv.sources]? Or are we not installing cyclonedds at all? Kind of looks like the latter...

[charliermarsh]

The problem is the break in the script -- try this:

# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "cyclonedds ==0.11.0",
# ]
#
# [tool.uv]
# index-strategy = "unsafe-best-match"
#
# [tool.uv.sources]
# cyclonedds = { git = "https://github.com/eclipse-cyclonedds/cyclonedds-python.git", rev = "080dfd4b26e4c4dc2529694ef9cf9589750360c1" }
#
# ///


import cyclonedds as dds

print("Hello, World!")

[charliermarsh]

I need to review the spec to see what the correct behavior is.

[zanieb]

Ah gotcha... I wonder if we can / should warn here? We could document it, at least.

[charliermarsh]

Okay, it is correct to reject that per the spec:

Every line between these two lines (# /// TYPE and # ///) MUST be a comment starting with #. If there are characters after the # then the first character MUST be a space.

But I think we should warn if we see # /// script but don't identify a script?

[bongomachine]

The problem is the break in the script -- try this:

# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "cyclonedds ==0.11.0",
# ]
#
# [tool.uv]
# index-strategy = "unsafe-best-match"
#
# [tool.uv.sources]
# cyclonedds = { git = "https://github.com/eclipse-cyclonedds/cyclonedds-python.git", rev = "080dfd4b26e4c4dc2529694ef9cf9589750360c1" }
#
# ///


import cyclonedds as dds

print("Hello, World!")

That worked! Thanks!

FYI: The break was introduced when I first ran the following command: CYCLONEDDS_HOME=~/.local uv add --script test.py git+https://github.com/eclipse-cyclonedds/cyclonedds-python.git --rev 080dfd4b26e4c4dc2529694ef9cf9589750360c1. (And then I added index-strategy and explicit version while debugging).

[charliermarsh]

Ohh nice, now that is a bug!