Update Developer Guide with CRYPTROOT_AUTOUNLOCK info

[sashasimkin]

Added note about CRYPTROOT_AUTOUNLOCK storing the encryption key.

for armbian/build#8805

[coderabbitai]

Walkthrough

This pull request adds documentation for a new CRYPTROOT_AUTOUNLOCK parameter in the Developer Guide's build switches documentation. The parameter is configured under the CRYPTROOT_PASSPHRASE/CRYPTROOT_PARAMETERS section and defaults to "no". When set to "yes" it permits unattended root filesystem unlocking and allows the CRYPTROOT_PASSPHRASE to be omitted. An additional bullet notes that CRYPTROOT_AUTOUNLOCK stores the encryption key in /etc/rootfs.key (misspelling preserved from the diff).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Pre-merge checks and finishing touches

❌ 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%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The pull request title "Update Developer Guide with CRYPTROOT_AUTOUNLOCK info" is fully aligned with the changeset. The raw summary confirms that the only modified file is docs/Developer-Guide_Build-Switches.md, where documentation for CRYPTROOT_AUTOUNLOCK was added, including its default value and functionality for unattended unlocking. The title is concise, specific, and clearly communicates the primary change to someone reviewing the commit history.
Description Check	✅ Passed	The pull request description is directly related to the changeset. It states "Added note about CRYPTROOT_AUTOUNLOCK storing the encryption key," which aligns with the raw summary indicating that a bullet note was added explaining that CRYPTROOT_AUTOUNLOCK stores the encryption key in /etc/rootfs.key. While the description is brief, it conveys relevant information about the change and includes a reference to the related build repository pull request for context.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📥 Commits

Reviewing files that changed from the base of the PR and between 8ec589f and f5b6cdb.

📒 Files selected for processing (1)

• docs/Developer-Guide_Build-Switches.md (2 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• docs/Developer-Guide_Build-Switches.md

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

Disabled knowledge base sources:

• Jira integration is disabled by default for public repositories

You can enable these sources in your CodeRabbit configuration.

📥 Commits

Reviewing files that changed from the base of the PR and between d918a4f and 8ec589f.

📒 Files selected for processing (1)

• docs/Developer-Guide_Build-Switches.md (2 hunks)

🔇 Additional comments (1)

docs/Developer-Guide_Build-Switches.md (1)

211-211: Documentation addition looks good.

Line 211 correctly documents the CRYPTROOT_AUTOUNLOCK parameter with a clear explanation of its default value and purpose. The formatting is consistent with adjacent parameters in the code block.