refactor: update renovate to update rust version

[joaolfp]

Summary by CodeRabbit

• Chores
  • Configured automated updates for the Rust toolchain via Renovate, ensuring timely version bumps and reducing manual maintenance.
  • Maintains existing commit message format while adding smarter detection of Rust version changes.
  • No user-facing behavior changes.

[coderabbitai]

Walkthrough

Introduced a regex-based Renovate custom manager in .github/renovate.json to detect and update Rust channel versions from rust-toolchain.toml using GitHub releases. Existing commit message settings remain unchanged.

Changes

Cohort / File(s)	Summary
Renovate configuration \.github/renovate.json	Added customManagers array with a regex manager targeting `/^

Sequence Diagram(s)

sequenceDiagram
  participant Renovate
  participant Repo
  participant GitHubReleases as GitHub Releases (rust-lang/rust)
  participant PR as PR

  Renovate->>Repo: Scan files
  Note over Renovate,Repo: Custom manager matches rust-toolchain.toml
  Renovate->>Repo: Read channel = "X.Y[.Z]"
  Renovate->>GitHubReleases: Fetch latest Rust releases
  GitHubReleases-->>Renovate: Release tags (versions)
  Renovate->>Renovate: Compare channel vs latest
  alt Update available
    Renovate->>Repo: Update channel value
    Renovate->>PR: Open PR with commitMessageTopic
  else Up-to-date
    Renovate-->>Repo: No action
  end

Loading

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nibble configs, ears a-twitch with cheer,
A regex hop finds Rustly versions here.
From toolchain trails to release burrows bright,
I bump the channel, tidy and light.
Thump-thump—Renovate hums through the night. 🐇✨

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch structure/update-renovate

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

.github/renovate.json (1)

15-15: Optional: clearer commit message topic.

If you prefer human-friendly subjects over owner/repo names, consider:

-  "commitMessageTopic": "{{depName}} to v{{newVersion}}",
+  "commitMessageTopic": "Rust toolchain to v{{newVersion}}",

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 21cf2aa and 89586b5.

📒 Files selected for processing (1)

• .github/renovate.json (1 hunks)

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• GitHub Check: build
• GitHub Check: Summary
• GitHub Check: build

🔇 Additional comments (1)

.github/renovate.json (1)

16-29: Fix invalid Renovate custom manager keys and dep name (config currently ineffective).

• Replace managerFilePatterns with fileMatch (no literal slashes).
• Drop packageNameTemplate; set "depNameTemplate": "rust-lang/rust".
• Enforce three-part versions in matchStrings and add "versioningTemplate": "semver".

   "customManagers": [
     {
       "customType": "regex",
-      "depNameTemplate": "rust",
-      "packageNameTemplate": "rust-lang/rust",
+      "depNameTemplate": "rust-lang/rust",
       "datasourceTemplate": "github-releases",
-      "managerFilePatterns": [
-        "/(^|/)rust-toolchain\\.toml$/"
-      ],
+      "fileMatch": [
+        "(^|/)rust-toolchain\\.toml$"
+      ],
       "matchStrings": [
-        "channel\\s*=\\s*\"(?<currentValue>\\d+\\.\\d+(\\.\\d+)?)\""
+        "channel\\s*=\\s*\"(?<currentValue>\\d+\\.\\d+\\.\\d+)\""
       ],
+      "versioningTemplate": "semver"
     }
   ]

Validate after configuring a GitHub token:

export RENOVATE_TOKEN=<your_token>
npx -y renovate@latest validate .github/renovate.json