Backport long comment fix

[zendern]

Link to Issue or Message thread

LabAutomationAndScreening/copier-pulumi-project#30

Why is this change necessary?

We had a preview that was very very long breaking the limit that is allowed by Github comments.

How does this change address the issue?

Backports the fix that we added to the copier-pulumi-project

What side effects does this change have?

Fixes if previews get too long

Summary by CodeRabbit

Release Notes

Improvements

• Pulumi deployment preview comments in pull requests now feature improved output formatting and handling
• Large deployment previews gracefully truncate when exceeding size limits while providing links to view complete logs
• Enhanced preview comment generation and delivery mechanism for increased reliability

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

The Pulumi ephemeral deploy action workflow was refactored to replace an external action for capturing Pulumi CLI output with an inline shell script. The new approach collects output into a variable, formats it as Markdown, writes it to a temporary file with size constraints, and posts the file to pull request comments instead of direct inline messages.

Changes

Cohort / File(s)	Summary
Pulumi Ephemeral Deploy Action template/template/.github/actions/pulumi_ephemeral_deploy/action.yml.jinja-base	Modified CLI output capture mechanism: replaced external action with inline shell script that constructs Markdown-formatted preview, implements 65,535 byte truncation threshold with fallback message and link, and writes to temporary file for PR comment posting.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• Pulumi preview and new helper action to save on job executions #123: Modifies the same Pulumi ephemeral deploy action steps and addresses Pulumi preview output capture and PR posting mechanisms.

Suggested reviewers

• ejfine

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Backport long comment fix' is directly related to the main change, which involves backporting a fix for handling long Pulumi preview comments that exceed GitHub's limits.
Description check	✅ Passed	The pull request description covers the required sections from the template with appropriate content: issue link, clear motivation, explanation of the fix, and side effects. Only the testing section is missing but is non-critical.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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