https://github.com/mweibel/lcov-result-merger

Merges multiple lcov results into one
https://github.com/mweibel/lcov-result-merger

Last synced: 1 day ago
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Merges multiple lcov results into one

• Host: GitHub
• URL: https://github.com/mweibel/lcov-result-merger
• Owner: mweibel
• License: mit
• Created: 2013-05-01T13:26:28.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2024-05-17T11:39:09.000Z (5 months ago)
• Last Synced: 2024-09-07T11:36:45.607Z (26 days ago)
• Language: JavaScript
• Size: 269 KB
• Stars: 100
• Watchers: 8
• Forks: 22
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE

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README

        
# LCOV Result Merger

[![npm version](https://badge.fury.io/js/lcov-result-merger.svg)](https://badge.fury.io/js/lcov-result-merger)

[![Build Status](https://travis-ci.org/mweibel/lcov-result-merger.png)](https://travis-ci.org/mweibel/lcov-result-merger)

[![Coverage Status](https://coveralls.io/repos/github/mweibel/lcov-result-merger/badge.svg?branch=master)](https://coveralls.io/github/mweibel/lcov-result-merger?branch=master)

[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg)](http://standardjs.com/)

[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)

When you have multiple test suites for the same application you still want to

have the code coverage across all testsuites.

This tool will handle this for you.

# Usage

```bash

./node_modules/.bin/lcov-result-merger 'FILE_PATTERN' ['OUTPUT_FILE']

```

# Examples

## Use stdout

1. Generate LCOV Code Coverage into different files, e.g. `build/coverage/coverage_X.log`

2. Run `./node_modules/.bin/lcov-result-merger 'build/coverage/coverage_*.log'`

3. Use the stdout to pipe it to e.g. [Coveralls](http://coveralls.io)

4. Done.

## Use merged output file

1. Generate LCOV Code Coverage into different files, e.g. `build/coverage/coverage_X.log`

2. Run `./node_modules/.bin/lcov-result-merger 'build/coverage/coverage_*.log' 'target/coverage/coverage_merged.log'`

3. Done. Enjoy your merged file.

## Prepend source file paths

Modify source file paths to be relative to the working directory that the merge operation was run in. Useful in

monorepos where each child package gathers its own metrics.

```bash

./node_modules/.bin/lcov-result-merger 'FILE_PATTERN' ['OUTPUT_FILE'] --prepend-source-files

```

Since coverage output is rarely written directly into the project root, use `--prepend-path-fix` to describe the

relative path between the lcov file and the project root. The default simply points to one directory up, "..", which

works well for common tools such as [NYC](https://github.com/istanbuljs/nyc) that write to a `/coverage` directory.

```bash

./node_modules/.bin/lcov-result-merger 'FILE_PATTERN' ['OUTPUT_FILE'] --prepend-source-files --prepend-path-fix "../src"

```