gnodet opened a new issue, #12645: URL: https://github.com/apache/maven/issues/12645
## Context PR #12572 (Build Report Foundation) introduced `mvnlog`, a CLI tool that renders build reports as formatted terminal output. While the terminal output is functional, a web-based viewer would provide a much richer experience for exploring build reports. ## Proposal Add a `--web` flag to `mvnlog` that starts a lightweight local HTTP server serving an interactive build report viewer: ```bash mvnlog --web # starts on localhost, auto-opens browser mvnlog --web --port 8080 # custom port ``` ## Implementation Plan ### Server (Java — zero external dependencies) Use the JDK built-in `com.sun.net.httpserver.HttpServer` (available since Java 6, no additional dependencies): - **`/`** — serves a single HTML page with inlined CSS + vanilla JS (bundled as a classpath resource) - **`/api/report`** — returns the raw `build-report.json` content - **`/api/reports`** — lists available build reports - **Auto-open** — `java.awt.Desktop.browse(URI)` to open the browser - **Self-terminating** — shuts down after 30 minutes of inactivity, or Ctrl+C - **Port selection** — try default port, fall back to random available port if busy ### Frontend (single HTML file — no build step, no framework) A single `report.html` resource bundled in the Maven distribution, containing: #### Header - Status badge (SUCCESS/FAILURE) with color - Maven version, Java version, start time, total duration - Goals executed, thread count #### Module Timeline (Gantt chart) - Horizontal bars showing parallel module builds - Color-coded by status (green/red/gray) - Hover for duration details - Click to expand mojo breakdown #### Mojo Detail Panel - Click a module → see individual mojo executions - Duration bars with proportional sizing - Phase grouping (compile, test, package, etc.) - Expandable log output per mojo #### Problems Panel - Filterable by severity (ERROR/WARN/INFO) - Searchable by message text - Each problem shows: key, source, suggestion (clickable), documentation URL (clickable link) - Sortable by severity, source, key #### Failures Panel - Stack traces with syntax highlighting - Module and mojo context - Collapsible for long traces #### Log Viewer - Full build log with virtual scrolling (for large logs) - Level-based filtering (ERROR/WARN/INFO/DEBUG) - Module-scoped filtering - Text search with highlighting ### Design Principles - **No npm, no webpack, no React** — vanilla HTML/CSS/JS only, bundled as a single file - **Responsive** — works on mobile (check build status from phone) - **Dark/light mode** — respects `prefers-color-scheme` - **Accessible** — proper ARIA roles, keyboard navigation - **Offline** — everything inlined, no CDN dependencies - **Small** — target < 50KB for the HTML resource ## Non-Goals (for this issue) - Real-time streaming of ongoing builds (future enhancement) - Multi-build comparison/history (future enhancement) - Persistent server mode (future enhancement) - Remote access / authentication (future enhancement) ## Depends on - #12572 (Build Report Foundation) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
