Rename generateDOTofCFG to generatePdfOfCfg, install graphviz

[mernst]

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• dataflow/src/main/java/org/checkerframework/dataflow/cfg/visualize/CFGVisualizeLauncher.java

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📝 Walkthrough

Walkthrough

CFGVisualizeLauncher renames its visualization methods from generateDOTofCFG variants to generatePdfOfCfg variants. Internal analysis paths and the BusyExpression test call site use the new names. Method signatures, parameters, bodies, arguments, and control flow remain unchanged.

Priority: ⬇️ Low

Change: Refactor

Merge Risk: 🔵 Low · up to 11f8c

Downstream callers using the old method may fail to compile after release without appropriate documentation and versioning; this is a bounded release-metadata follow-up.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 2 files.
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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Actionable comments posted: 1

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Inline comments:
In
`@dataflow/src/main/java/org/checkerframework/dataflow/cfg/visualize/CFGVisualizeLauncher.java`:
- Line 204: Document the public API rename from generateDOTofCFG to
generatePdfOfCfg in the changelog as an intentional breaking change, and apply
the required minor-version bump for the release. Keep the renamed
generatePdfOfCfg API unchanged and do not add a deprecated forwarding overload.

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📒 Files selected for processing (16)

• checker/bin-devel/Dockerfile-contents-ubuntu-base.m4
• checker/bin-devel/Dockerfile-contents-ubuntu-plus.m4
• checker/bin-devel/Dockerfile-ubuntu-jdk17
• checker/bin-devel/Dockerfile-ubuntu-jdk17-plus
• checker/bin-devel/Dockerfile-ubuntu-jdk21
• checker/bin-devel/Dockerfile-ubuntu-jdk21-plus
• checker/bin-devel/Dockerfile-ubuntu-jdk25
• checker/bin-devel/Dockerfile-ubuntu-jdk25-plus
• checker/bin-devel/Dockerfile-ubuntu-jdk26
• checker/bin-devel/Dockerfile-ubuntu-jdk26-plus
• checker/bin-devel/Dockerfile-ubuntu-jdkbase
• checker/bin-devel/Dockerfile-ubuntu-jdkplus
• checker/bin-devel/Dockerfile-ubunturolling-jdkbase
• checker/bin-devel/Dockerfile-ubunturolling-jdkplus
• dataflow/src/main/java/org/checkerframework/dataflow/cfg/visualize/CFGVisualizeLauncher.java
• dataflow/src/test/java/busyexpr/BusyExpression.java

💤 Files with no reviewable changes (1)

• checker/bin-devel/Dockerfile-contents-ubuntu-plus.m4

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