Add init support for nitro

[je-vv]

This merge request is meant to add support for nitro init system, just like dinit and others. It should address issue #47

[coderabbitai]

Walkthrough

Added Nitro init tooling detection to detect_init() in resolvconf.in: when /etc/nitro exists and nitroctl is available, RESTARTCMD is set to a conditional snippet that uses nitroctl pidof $1 and only runs nitroctl restart $1 if the service is reported running.

Changes

Cohort / File(s)	Summary
Nitro Init Detection resolvconf.in	Inserted Nitro detection into detect_init() fallback chain (checks /etc/nitro and nitroctl); sets RESTARTCMD to a conditional shell snippet that runs nitroctl restart $1 only when nitroctl pidof $1 indicates the service is running.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Add init support for nitro' directly and clearly summarizes the main change: adding support for the nitro init system.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The pull request description accurately relates to the changeset, describing the addition of nitro init system support to match existing init systems like dinit.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@resolvconf.in`:
- Around line 478-479: The new RESTARTCMD assignment currently invokes "nitroctl
restart $1" unconditionally; change it to first check service liveness with
"nitroctl pidof $1" (or equivalent) and only call "nitroctl restart $1" when
pidof reports the service is running, otherwise do nothing (preserve the
no-op/silent-failure behavior defined for -r); update the RESTARTCMD binding so
it performs the pidof check and conditional restart to avoid returning non-zero
when the service is absent or stopped.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: cb3262a5-c788-49ae-8b65-541968b8f53f

📥 Commits

Reviewing files that changed from the base of the PR and between 6489889 and 6756529.

📒 Files selected for processing (1)

• resolvconf.in