metrics for Python, C, C++, Go and Javascript code (plugins for pylint, pytest-cov, and git available)
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Project description
metrics
The original idea of metrics was a platform that can be extended with many different metrics. At the time I will focus only on SLOC and McCabe complexity metrics. metrics is build in a way to support many, many languages supported languages. Currently we test support for Python, C, C++, Go and JavaScript.
The SLOC metric counts the lines but excludes empty lines and comments. This is sometimes referred to as the source lines of code (SLOC). In literature this is often also referred as physical lines of code. I simplified it to something which to my understanding is the common denominator for the metric packages I looked into (CCCC, SLOCCount, PyMetrics, Eclipse-Metrics, Ohcount).
installation
metrics is released as a Python package so you can apply the std. Python mechanism for installation:
$ pip install metrics
Some plugins are available to collect information from a typical development environment. If you have a similar environment you can install them as well in one go:
$ pip install metrics metrics.bumpversion metrics.gitinfo metrics.pylint metrics.pytest-cov
Sample use
Get an overview on a package (number of files, used languages, and metrics):
$ metrics **/*
Metrics Summary:
Files Language SLOC Comment McCabe
----- ------------------------------ ----------- ------- ------
6 C 14 3 0
3 C++ 1114 236 108
1 INI 5 0 0
2 Java 27 8 1
3 JavaScript 1453 54 169
1 markdown 7 0 0
18 Python 1038 425 238
11 Text only 0 0 0
----- ------------------------------ ----------- ------- ------
45 Total 3658 726 516
Note how you can use glob file pattern or a list of files…
Usage help:
$ metrics --help Options: --version show program's version number and exit -h, --help show this help message and exit -f IN_FILE_LIST, --files=IN_FILE_LIST File containing list of path names to modules for analysis. -q, --quiet suppress normal summary output to stdout. (Default is False) --format=OUTPUT_FORMAT_STR Choose an output format for a parser to read. Valid choices: xml, csv, json
Get a detailed report:
$ metrics -q --format=csv metrics/metrics.py
filename,sloc,comments,ratio_comment_to_code,mccabe,language
metrics/metrics.py,21,14,0.67,1,Python
Same detailed report but output to csv file:
$ metrics -q --format=csv metrics/metrics.py > output.csv
Plugins for metrics
Some plugins are available to collect information from a typical development environment. Please visit the plugin page for details:
Sample “.metrics” file results (with plugins installed)
{ "build": { "active_branch": "master", "committed_datetime": "2018-04-28T12:19:14+02:00", "committed_ts": 1524910754, "committers": [ "mark" ], "origin": "git@github.com:markfink/metrics.gitinfo.git", "sha": "4c355c2f6ffef88252e565f6ef5006468e410187", "sha_start": "f7ba6f27ee8c34991acd3cd6ef14c8bd6ed9c34e", "summary": "Bump version: 0.0.4 \u2192 0.0.5", "version": "0.0.5" }, "files": { "metrics_gitinfo/__init__.py": { "age_days": 25.81871527777778, "block_positions": [], "change_frequency": 6, "comments": 1, "committers_count": 1, "language": "Python", "lines_added": [ 3 ], "lines_deleted": [ 3 ], "mccabe": 0, "pylint_score": 5.0, "ratio_comment_to_code": 0.5, "sloc": 2, "test_coverage": 0.0, "test_missing": "2-3" }, "metrics_gitinfo/file_info.py": { "age_days": 0.01931712962962963, "block_positions": [ { "end": 17, "name": "get_file_info", "start": 5, "type": "Function" } ], "change_frequency": 1, "comments": 4, "committers_count": 1, "language": "Python", "mccabe": 1, "pylint_score": 10.0, "ratio_comment_to_code": 0.44, "sloc": 9, "test_coverage": 0.0, "test_missing": "2-17" }, "metrics_gitinfo/git_diff_muncher.py": { "age_days": 24.06056712962963, "block_positions": [ { "end": 17, "name": "GitDiffError", "start": 10, "type": "Class" }, { "end": 81, "name": "parse_diff_lines", "start": 18, "type": "Function" }, { "end": 111, "name": "_parse_hunk_line", "start": 82, "type": "Function" } ], "change_frequency": 1, "comments": 50, "committers_count": 1, "language": "Python", "mccabe": 15, "pylint_score": 9.56, "ratio_comment_to_code": 1.02, "sloc": 49, "test_coverage": 0.0, "test_missing": "2-129" }, "metrics_gitinfo/gitinfo.py": { "age_days": 25.81871527777778, "block_positions": [ { "end": 17, "name": "get_file_processors", "start": 13, "type": "Function" }, { "end": 22, "name": "get_build_processors", "start": 18, "type": "Function" }, { "end": 113, "methods": [ { "end": 35, "name": "_get_commits_contained", "start": 31, "type": "Function" }, { "end": 41, "name": "_get_source_target", "start": 36, "type": "Function" }, { "end": 56, "name": "_extract_info", "start": 52, "type": "Function" }, { "end": 88, "name": "reset", "start": 84, "type": "Function" }, { "end": 105, "name": "process_file", "start": 89, "type": "Function" }, { "end": 108, "name": "get_metrics", "start": 106, "type": "Function" }, { "end": 113, "name": "get_build_metrics", "start": 109, "type": "Function" } ], "name": "GitMetric", "start": 23, "type": "Class" } ], "change_frequency": 7, "comments": 9, "committers_count": 1, "language": "Python", "lines_added": [ 96 ], "lines_deleted": [ 66, 94, 97 ], "mccabe": 8, "pylint_score": 9.06, "ratio_comment_to_code": 0.11, "sloc": 83, "test_coverage": 0.0, "test_missing": "2-113" }, "tests/__init__.py": { "age_days": 24.099988425925925, "block_positions": [ { "end": 10, "name": "here", "start": 9, "type": "Function" } ], "change_frequency": 1, "comments": 1, "committers_count": 1, "language": "Python", "mccabe": 0, "pylint_score": 3.33, "ratio_comment_to_code": 0.17, "sloc": 6, "test_coverage": 83.33, "test_missing": "10" }, "tests/test_metrics_gitinfo.py": { "age_days": 22.091909722222223, "block_positions": [ { "end": 19, "name": "tempfolder", "start": 11, "type": "Function" }, { "end": 29, "name": "test_metrics_gitinfo_no_git_repo", "start": 20, "type": "Function" }, { "end": 39, "name": "test_metrics_gitinfo", "start": 30, "type": "Function" }, { "end": 47, "name": "test_metrics_gitinfo_no_lastrun", "start": 40, "type": "Function" } ], "change_frequency": 1, "comments": 2, "committers_count": 1, "language": "Python", "mccabe": 6, "pylint_score": 4.64, "ratio_comment_to_code": 0.07, "sloc": 29, "test_coverage": 100.0 } } }
Acknowledgements
- codebase originally based on grop.py by Jurgen Hermann (2001)
- also based on PyMetrics by Reg. Charney to do Python complexity measurements (2007)
- we use some sample programming language files for the test cases from Ohcount and Firefox
License
Copyright (c) 2017, 2018 Fink Labs GmbH and others. metrics is released under the MIT License (see MIT_LICENSE).
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