reveille 0.1.0

A CLI tool that generates self-contained HTML performance reports from local Git repositories.

Reveille

A CLI tool that generates self-contained HTML performance reports from local Git repositories.

Reveille reads your repository's Git history and produces a single portable .html file containing interactive visualisations of contributor activity, commit trends, code volume, and repository health — with no server, no external API calls, and no configuration beyond the command itself. Open the output in any browser, share it over email, or drop it into a Confluence page without modification.

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Contents

• Overview
• Installation
• Quickstart
• CLI Reference
• Output Description
• Contributor Ranking System
• Configuration
• Documentation
• Development Setup
• Running Tests
• Contributing
• Changelog
• Licence

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Overview

Reveille is designed for developers, engineering managers, and technical leads who need a production-grade, shareable retrospective from any Git repository — without configuring infrastructure or connecting to external services.

What it produces:

• Contribution heatmaps showing commit activity by day and hour
• Commit frequency histograms and rolling activity timelines
• Per-contributor breakdowns covering commits, lines added and removed, and active day counts
• A structured ranking table assigning each contributor a tier designation based on weighted activity metrics
• Repository health indicators including bus factor, activity recency, and consistency scores

Design constraints that are non-negotiable:

• The output is always a single .html file. No directories, no asset folders, no dependencies.
• The file must open in any modern browser with no internet connection. All JavaScript, CSS, and chart data are embedded inline.
• No external CDN calls. No iframes. No cookies. No tracking.
• The output aesthetic is formal and stakeholder-ready. No emojis. No casual language. Typography is clean and readable.

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Installation

Reveille requires Python 3.11 or later.

Install from PyPI:

pip install reveille

Install with pipx (recommended for CLI tools):

pipx install reveille

Verify the installation:

reveille --version

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Quickstart

Navigate to any Git repository on your machine and run:

cd /path/to/your/repository
reveille generate

Reveille reads the local Git history and writes a report to the current directory. The output file is named reveille-report.html by default. Open it in any browser.

Generate a report for a specific date range:

reveille generate --since 2024-01-01 --until 2024-12-31

Write the output to a specific path:

reveille generate --output /tmp/q4-report.html

Specify the repository path explicitly:

reveille generate --repo /path/to/repository

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CLI Reference

reveille generate

Generates the HTML performance report for the target repository.

Flag	Short	Type	Default	Description
--repo	-r	PATH	. (current directory)	Path to the Git repository root. Must contain a .git directory.
--output	-o	PATH	./reveille-report.html	Path for the generated HTML file. Parent directories must exist.
--since		DATE	Repository creation date	Include only commits on or after this date. Accepts YYYY-MM-DD.
--until		DATE	Today	Include only commits on or before this date. Accepts YYYY-MM-DD.
--branch	-b	TEXT	Default branch	Analyse commits reachable from this branch only.
--exclude-author		TEXT	None	Exclude a contributor by name or email. Repeatable.
--min-commits		INT	1	Exclude contributors with fewer than this many commits in the analysis window.
--title		TEXT	Repository name	Override the report title displayed in the HTML output.
--no-ranking		Flag	Off	Omit the contributor ranking table from the output.
--config	-c	PATH	None	Path to a TOML configuration file. CLI flags take precedence over config file values.

reveille version

Prints the installed version string and exits.

reveille validate

Validates that the target path is a readable Git repository and that the analysis window contains at least one commit. Exits with a non-zero status code if validation fails. Useful for CI integration.

reveille validate --repo /path/to/repository

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Output Description

The generated HTML file is structured as a formal report with the following sections.

Repository Summary — Name, remote URL if present, default branch, total commits in the analysis window, unique contributors, date range, and report generation timestamp.

Activity Heatmap — A calendar-style matrix showing commit frequency by day across the analysis window. Modelled on GitHub's contribution graph but scoped to the repository and time range specified.

Commit Timeline — A rolling line chart showing commit volume per week over the analysis window. Highlights periods of high and low activity.

Contributor Summary Table — A ranked table listing each contributor with their commit count, lines added, lines removed, net line delta, active days, most recent commit date, and assigned tier designation.

Per-Contributor Activity Charts — Commit frequency histograms for each contributor showing their distribution of activity across the analysis window.

Repository Health Indicators — Bus factor estimate (minimum number of contributors accounting for 50% of commits), longest inactive streak, activity recency score, and contributor retention across the window.

All charts are rendered with Plotly and are fully interactive — hover states, zoom, pan, and legend toggling are available without any external dependencies.

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Contributor Ranking System

Reveille assigns each contributor a tier designation based on a weighted composite of four metrics.

Metric	Default Weight
Commit volume	30%
Lines contributed (additions + deletions)	25%
Activity consistency (active days / total days)	25%
Recency (decay-weighted recent activity)	20%

Weights are configurable. See Configuration.

The composite score maps to the following tier designations, applied relative to the contributor population in the analysis window.

Tier	Designation	Composite Score Percentile
I	Private	0 – 20th
II	Corporal	21st – 40th
III	Sergeant	41st – 60th
IV	Lieutenant	61st – 75th
V	Captain	76th – 88th
VI	Major	89th – 95th
VII	Commander	96th – 100th

Tier boundaries and weights are documented defaults and are fully reproducible from the source. Changing the weights changes the scores but not the tier logic. Tiers are always relative to the contributor population within the analysis window, not absolute thresholds.

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Configuration

Reveille accepts a TOML configuration file for parameters that are cumbersome to pass on the command line on every invocation.

Create a file named reveille.toml at the repository root or pass the path explicitly with --config.

[report]
title = "Engineering Performance Report — Q4 2024"
output = "./reports/q4-2024.html"
branch = "main"
since = "2024-10-01"
until = "2024-12-31"

[filters]
min_commits = 2
exclude_authors = [
    "dependabot[bot]",
    "github-actions[bot]",
]

[ranking]
enabled = true
weights = { commits = 0.30, lines = 0.25, consistency = 0.25, recency = 0.20 }

CLI flags always take precedence over configuration file values. The configuration file is entirely optional — all values have defaults.

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Documentation

A full operational reference is available at docs/USER_GUIDE.md. It covers every CLI flag and its interaction effects, every TOML key with annotated examples, the ranking algorithm in plain language, how to interpret each section of the generated report, and practical patterns for common use cases.

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Development Setup

Prerequisites: Python 3.11 or later, git.

git clone [e-mail]:varaprasadchilakanti/reveille.git
cd reveille
poetry install

Verify the environment:

poetry run reveille --version
poetry run mypy src/
poetry run ruff check src/

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Running Tests

pytest

With coverage report:

pytest --cov=reveille --cov-report=term-missing

Type checking only:

mypy src/

Linting only:

ruff check src/

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Contributing

Contributions are welcome. Before opening a pull request, please read the following.

Reporting issues. Use GitHub Issues. Include the output of reveille --version, the operating system, Python version, and a minimal reproduction case. If the issue involves a specific repository, a sanitised git log --oneline covering the relevant range is sufficient — do not include source code.

Proposing changes. Open an issue before starting significant work. This avoids duplication and ensures the direction is aligned before effort is invested.

Submitting pull requests. All pull requests must target the main branch. The CI pipeline runs ruff, mypy, and pytest on every pull request. All three must pass. New public functions require docstrings. New behaviour requires tests. The output contract — single self-contained HTML file, no external calls, formal aesthetic — is non-negotiable and must be preserved in every contribution.

Code style. Ruff handles linting and import ordering. Mypy runs in strict mode. Type annotations are required on every function signature. Early returns are preferred over nested conditionals throughout.

Commit messages. Follow the Conventional Commits specification: feat:, fix:, docs:, refactor:, test:, chore:. Scope is optional but encouraged, e.g. feat(ranking): add recency decay weighting.

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Changelog

See CHANGELOG.md for the full release history. Reveille follows Keep a Changelog format and Semantic Versioning 2.0.

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Licence

Reveille is released under the MIT Licence.