[FIX][pyoutline] Compact frame range layer

[anton-ubi]

Summary

Large frame ranges could fail to launch because pyoutline serialized a layer's range as a fully enumerated, comma-separated frame list, which could overflow Cuebot's fixed-width database column. Frames are now grouped into compact "start-end" spans instead.

Description

Layer.get_frame_range() now compacts the layer's frame list into "start-end" spans wherever frames are contiguous (e.g. 1000-1800 instead of 1000,1001,1002,...,1800), instead of writing out every frame number. Order and duplicates are preserved exactly as before; only the string representation changes.

As a second line of defense, layer.str_range and layer.str_cmd are widened from VARCHAR(4000) to text, so a range or command that is still long even after compaction (many non-contiguous frames, or a long, path-heavy command) no longer risks hitting the column limit either.

Rationale

A job's layer range gets serialized into the job spec and stored in layer.str_range, a VARCHAR(4000) column. For a layer with a large, fully enumerated frame list, that string can exceed 4000 characters, which rolls back the job launch with an unhelpful error:

grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
    status = StatusCode.INTERNAL
    details = "Failed to launch and add job: Incorrect result size: expected 1, actual 0"
>

This reproduces reliably around 800-801 four-digit frames (800 * 5 - 1 = 3999 chars fits, 801 * 5 - 1 = 4004 doesn't), which lines up with the column size. Users hit this on jobs with a few thousand frames and had no workaround other than splitting the job into smaller ranges.

Minimal repro (fails on master, passes with this fix):

import opencue
import outline

ol = outline.Outline("example_job", frame_range="1000-1800")
layer = outline.Layer("render", command=["echo", "Hello, World!"], range="1000-1800")
ol.add_layer(layer)

outline.cuerun.launch(ol, use_pycuerun=False)

801 frames (1000-1800) is enough to push the enumerated range past 4000 characters and fail the launch; 1000-1799 (800 frames) succeeds.

The failure only shows up when both the outline and the layer are given the overflowing range, as above. Giving it to only one of them does not trigger it, e.g.:

ol = outline.Outline("example_job", frame_range="1000-1800")
layer = outline.Layer("render", command=["echo", "Hello, World!"])
ol.add_layer(layer)

outline.cuerun.launch(ol, use_pycuerun=False)

Layer.get_frame_range() only enumerates a frame-by-frame intersection, and serializes that enumerated result, when both a layer range and an outline range are set. When only one is set, the layer returns that range's string as given, without ever enumerating it.

Compacting contiguous runs into spans keeps the common case (one large, mostly-contiguous range) well under the limit without changing frame order or count, both of which matter: frame order becomes each frame's dispatch order on the Cuebot side, and chunking groups frames by their position in the list, not by numeric adjacency.

Changes

• Add compact_frame_range() and wire it into Layer.get_frame_range(), replacing the fully enumerated frame list with a compact one.
• Remove a branch in Layer.get_frame_range() that normalized the intersected frame set (sorted and deduped it) and returned that normalized string instead of the raw intersection whenever the two matched. Both paths always produce the same output once serialized, so the check added nothing and is replaced by a single compact_frame_range() call.
• Widen layer.str_range and layer.str_cmd to text (migration V48__increase_layer_range_size.sql).

Summary by CodeRabbit

• New Features

  • Frame ranges are now displayed compactly, combining consecutive frames into spans while preserving order and duplicates.
  • Large frame ranges can be stored and exported without truncation or unnecessary enumeration.

• Bug Fixes

  • Improved handling of contiguous and non-contiguous frame ranges in layer data and Cue exports.

• Tests

  • Added coverage for large, compact, unordered, duplicate, and empty frame ranges.

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• VERSION.in

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📝 Walkthrough

Walkthrough

The change adds compact frame-range formatting, applies it to layer intersections, tests Cue serialization of large ranges, changes PostgreSQL layer range columns to text, and updates the version to 1.31.

Changes

Compact layer frame ranges

Layer / File(s)	Summary
Range formatter pyoutline/outline/util.py, pyoutline/tests/test_util.py	Adds compact_frame_range and tests contiguous, non-contiguous, ordered, and duplicate frames.
Layer integration pyoutline/outline/layer.py, pyoutline/tests/test_layer.py	Uses the formatter for intersected frame ranges and updates range expectations.
Cue and database support pyoutline/tests/backend/test_cue.py, cuebot/src/main/resources/conf/ddl/postgres/migrations/V48__increase_layer_range_size.sql	Tests serialization of 1001-2301 and changes layer.str_range and layer.str_cmd to text.
Version update VERSION.in	Updates the version from 1.30 to 1.31.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 50ff8

The change compacts large frame ranges and removes database length limits for stored ranges and commands; no actionable merge-blocking risk remains beyond normal checks and review.

Suggested reviewers: lithorus, diegotavares, ramonfigueiredo

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the pyoutline fix for compacting frame ranges, which is the primary change in the pull request.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Inline comments:
In
`@cuebot/src/main/resources/conf/ddl/postgres/migrations/V48__increase_layer_range_size.sql`:
- Around line 9-10: Update VERSION.in to increment the project minor version for
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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 2de7f7ae-2374-4948-b7ba-16b862da7ef3

📥 Commits

Reviewing files that changed from the base of the PR and between 1cea9a8 and d8731a5.

📒 Files selected for processing (6)

• cuebot/src/main/resources/conf/ddl/postgres/migrations/V48__increase_layer_range_size.sql
• pyoutline/outline/layer.py
• pyoutline/outline/util.py
• pyoutline/tests/backend/test_cue.py
• pyoutline/tests/test_layer.py
• pyoutline/tests/test_util.py