Added new entry for Plot output plugin doc. Fixes #2142.

[eschabell]

Added new entry for Plot output plugin doc. Fixes #2142.

Updates Summary.md to list new plot.md output plugin doc.

Summary by CodeRabbit

• Documentation
  • Added comprehensive documentation for the Plot output plugin, including configuration parameters, output format specifications, error handling behavior, command-line usage, configuration file examples, and detailed gnuplot integration examples.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

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📥 Commits

Reviewing files that changed from the base of the PR and between e4dc7ed and 7184d48.

📒 Files selected for processing (1)

• pipeline/outputs/plot.md (1 hunks)

Walkthrough

Documentation added for the Plot output plugin to the Outputs section. One reference entry added to SUMMARY.md and a new comprehensive documentation file created at pipeline/outputs/plot.md describing configuration, usage, output format, error handling, and workflow examples.

Changes

Cohort / File(s)	Change summary
Summary reference SUMMARY.md	Added single-line entry for Plot output plugin positioned after Parseable and before PostgreSQL
Plot plugin documentation pipeline/outputs/plot.md	New file documenting GNU Plot-compatible output plugin including configuration parameters (File, Key), two-column space-separated output format, error handling behavior, CLI and config file usage examples, gnuplot workflow with sample script, and behavioral notes

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

• Verify configuration parameters and defaults match actual plugin implementation
• Validate example configurations (YAML and fluent-bit.conf snippets) for accuracy
• Confirm gnuplot script example produces expected output format
• Check documentation formatting consistency with other output plugin docs

Poem

🐰 A plot takes shape, data flows true,
From timestamps dancing in columns new,
Gnuplot awaits our documented way,
The carrot of clarity wins the day! 📈✨

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Added new entry for Plot output plugin doc' accurately and specifically describes the main change of adding Plot plugin documentation.
Linked Issues check	✅ Passed	The PR successfully fulfills issue #2142 by adding Plot output plugin documentation and updating Summary.md as required.
Out of Scope Changes check	✅ Passed	All changes are directly related to the linked issue: new plot.md documentation file and Summary.md update for the Plot output plugin.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (2)

pipeline/outputs/plot.md (2)

7-7: Apply optional style improvements per repository conventions.

The pipeline flags two style recommendations on this line. While non-blocking in "Chill" mode, aligning with repository conventions is beneficial:

1. Replace "allows you to" with "lets you" (FluentBit.WordList).
2. Note: "gnuplot" spelling warnings are false positives; gnuplot is the correct tool name and should not be changed.

Apply this diff:

- The _Plot_ output plugin generates data files in a format compatible with [GNU Plot](http://www.gnuplot.info/) (gnuplot), a command-line graphing tool. This plugin allows you to export your telemetry data for visualization and analysis using gnuplot.
+ The _Plot_ output plugin generates data files in a format compatible with [GNU Plot](http://www.gnuplot.info/) (gnuplot), a command-line graphing tool. This plugin lets you export your telemetry data for visualization and analysis using gnuplot.

---

123-123: Simplify redundant phrasing (optional).

The phrase "PNG image file" is redundant; "PNG" alone is sufficient since PNG stands for Portable Network Graphics.

Apply this diff:

- This will generate a PNG image file showing the CPU usage over time.
+ This will generate a PNG image showing the CPU usage over time.

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between bf673c6 and e4dc7ed.

📒 Files selected for processing (2)

• SUMMARY.md (1 hunks)
• pipeline/outputs/plot.md (1 hunks)

🧰 Additional context used

🪛 GitHub Actions: Lint PRs

pipeline/outputs/plot.md

[error] 104-104: FluentBit.Latin: Use 'for example' instead of 'e.g.,'.

---

[warning] 7-7: FluentBit.Spelling: Spelling check: 'gnuplot'?

---

[warning] 7-7: FluentBit.WordList: Use 'lets you' instead of 'allows you to'.

---

[warning] 7-7: FluentBit.Spelling: Spelling check: 'gnuplot'?

---

[warning] 15-15: FluentBit.Contractions: Feel free to use 'can't' instead of 'cannot'.

---

[warning] 20-20: FluentBit.Spelling: Spelling check: 'gnuplot'?

---

[warning] 30-30: FluentBit.Contractions: Feel free to use 'it's' instead of 'it is'.

---

[warning] 32-32: FluentBit.Contractions: Feel free to use 'isn't' instead of 'is not'.

---

[warning] 32-32: FluentBit.Contractions: Feel free to use 'isn't' instead of 'is not'.

---

[warning] 86-86: FluentBit.Spelling: Spelling check: 'gnuplot'?

---

[warning] 117-117: FluentBit.Spelling: Spelling check: 'gnuplot'?

🪛 GitHub Check: runner / vale

pipeline/outputs/plot.md

[failure] 130-130:
[vale] reported by reviewdog 🐶
[FluentBit.Latin] Use 'for example' instead of 'e.g.,'.

Raw Output:
{"message": "[FluentBit.Latin] Use 'for example' instead of 'e.g.,'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 130, "column": 40}}}, "severity": "ERROR"}

---

[failure] 104-104:
[vale] reported by reviewdog 🐶
[FluentBit.Latin] Use 'for example' instead of 'e.g.,'.

Raw Output:
{"message": "[FluentBit.Latin] Use 'for example' instead of 'e.g.,'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 104, "column": 29}}}, "severity": "ERROR"}

---

[warning] 88-88:
[vale] reported by reviewdog 🐶
[FluentBit.Spelling] Spelling check: 'gnuplot'?

Raw Output:
{"message": "[FluentBit.Spelling] Spelling check: 'gnuplot'?", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 88, "column": 61}}}, "severity": "INFO"}

---

[warning] 86-86:
[vale] reported by reviewdog 🐶
[FluentBit.Spelling] Spelling check: 'gnuplot'?

Raw Output:
{"message": "[FluentBit.Spelling] Spelling check: 'gnuplot'?", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 86, "column": 23}}}, "severity": "INFO"}

---

[warning] 32-32:
[vale] reported by reviewdog 🐶
[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.

Raw Output:
{"message": "[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 32, "column": 110}}}, "severity": "INFO"}

---

[warning] 32-32:
[vale] reported by reviewdog 🐶
[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.

Raw Output:
{"message": "[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 32, "column": 84}}}, "severity": "INFO"}

---

[warning] 30-30:
[vale] reported by reviewdog 🐶
[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.

Raw Output:
{"message": "[FluentBit.Contractions] Feel free to use 'isn't' instead of 'is not'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 30, "column": 94}}}, "severity": "INFO"}

---

[warning] 20-20:
[vale] reported by reviewdog 🐶
[FluentBit.Spelling] Spelling check: 'gnuplot'?

Raw Output:
{"message": "[FluentBit.Spelling] Spelling check: 'gnuplot'?", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 20, "column": 70}}}, "severity": "INFO"}

---

[warning] 15-15:
[vale] reported by reviewdog 🐶
[FluentBit.Contractions] Feel free to use 'can't' instead of 'cannot'.

Raw Output:
{"message": "[FluentBit.Contractions] Feel free to use 'can't' instead of 'cannot'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 15, "column": 131}}}, "severity": "INFO"}

---

[warning] 7-7:
[vale] reported by reviewdog 🐶
[FluentBit.Spelling] Spelling check: 'gnuplot'?

Raw Output:
{"message": "[FluentBit.Spelling] Spelling check: 'gnuplot'?", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 7, "column": 243}}}, "severity": "INFO"}

---

[warning] 7-7:
[vale] reported by reviewdog 🐶
[FluentBit.WordList] Use 'lets you' instead of 'allows you to'.

Raw Output:
{"message": "[FluentBit.WordList] Use 'lets you' instead of 'allows you to'.", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 7, "column": 165}}}, "severity": "INFO"}

---

[warning] 7-7:
[vale] reported by reviewdog 🐶
[FluentBit.Spelling] Spelling check: 'gnuplot'?

Raw Output:
{"message": "[FluentBit.Spelling] Spelling check: 'gnuplot'?", "location": {"path": "pipeline/outputs/plot.md", "range": {"start": {"line": 7, "column": 113}}}, "severity": "INFO"}

🪛 LanguageTool

pipeline/outputs/plot.md

[style] ~123-~123: This phrase is redundant (‘G’ stands for ‘graphic’). Use simply “PNG”.
Context: ...uplot plot.gp ``` This will generate a PNG image file showing the CPU usage over time. ...

(ACRONYM_TAUTOLOGY)

---

[style] ~130-~130: This wording can make your sentence hard to follow. Try rephrasing for improved clarity.
Context: ...f the output file cannot be opened (e.g., due to permissions), the plugin automatically ...

(DUE_TO_BECAUSE)

🔇 Additional comments (2)

SUMMARY.md (1)

208-208: LGTM! Correct placement and formatting.

The Plot entry is properly positioned alphabetically between Parseable and PostgreSQL, follows the established format, and links to the new documentation file.

pipeline/outputs/plot.md (1)

1-131: Content structure and accuracy look good.

The documentation is well-organized, covers all essential aspects of the Plot output plugin (configuration, output format, usage examples), and includes a practical gnuplot workflow. The examples are clear and actionable. Note that other linting warnings flagged by the pipeline (contraction preferences and gnuplot spelling) are stylistic in nature and can be addressed as optional improvements per repository conventions if desired.

To ensure this documentation accurately reflects the Plot plugin behavior, please verify:

• The two configuration parameters (File and Key) and their defaults match the plugin source (plugins/out_plot/plot.c).
• The output format (space-separated timestamp-value pairs) is correct.
• The fallback-to-STDOUT behavior and append-mode file handling are accurate.

If available, you may want to cross-reference the actual plugin implementation to confirm no discrepancies.

[eschabell]

AI review completed, merging.