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https://github.com/dreamyguy/gitlogg
๐พ ๐งฎ ๐คฏ Parse the 'git log' of multiple repos to 'JSON'
https://github.com/dreamyguy/gitlogg
data-mining git git-log json json-parser multiple-repositories repository-mining repository-utilities statistics
Last synced: 22 days ago
JSON representation
๐พ ๐งฎ ๐คฏ Parse the 'git log' of multiple repos to 'JSON'
- Host: GitHub
- URL: https://github.com/dreamyguy/gitlogg
- Owner: dreamyguy
- License: mit
- Created: 2013-03-06T17:54:27.000Z (almost 12 years ago)
- Default Branch: master
- Last Pushed: 2023-07-07T15:03:40.000Z (over 1 year ago)
- Last Synced: 2024-08-05T17:38:18.175Z (4 months ago)
- Topics: data-mining, git, git-log, json, json-parser, multiple-repositories, repository-mining, repository-utilities, statistics
- Language: JavaScript
- Homepage:
- Size: 16.8 MB
- Stars: 130
- Watchers: 9
- Forks: 27
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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- awesome-hacking-lists - dreamyguy/gitlogg - ๐พ ๐งฎ ๐คฏ Parse the 'git log' of multiple repos to 'JSON' (JavaScript)
README
> _Parse the 'git log' of one or several 'git' repositories into a sanitised and distributable 'JSON' file._
[](https://github.com/dreamyguy/gitlogg/blob/master/LICENSE) [](https://github.com/dreamyguy/gitlogg-api) [](https://github.com/dreamyguy/gitinsight)
## Why?
`git log` is a wonderful tool. However its output can be not only surprisingly inconsistent, but also long, difficult to scan and to distribute.
**Gitlogg** sanitises the `git log` and outputs it to `JSON`, a format that can easily be consumed by other applications. As long as the repositories being scanned are kept up to date, **Gitlogg** will return fresh data every time it runs.
#### **Gitlogg** addresses the following challenges:
* `git log` can only be used on a repository at a time.
* `git log` can't be easily consumed by other applications in its original format.
* `git log` doesn't return **impact**, which is the cumulative change brought by a single commit. Very interesting graphs can be built with that data, as shown on [sidhree.com][1].
* Fields that allow user input, like `subject`, need to be sanitised to be consumed.
* File changes shown under `--stat` or `--shortstat` are currently not available as placeholders under `--pretty=format:`, and it is cumbersome to get commit logs to output neatly in single lines - with stats.
* It is hard to retrieve commits made on a specific but generic moment, like "11pm"; at the "27th minute" of an hour; on a "Sunday"; on "March"; on "GMT -5"; on the "53rd second of a minute".
* Some commits don't have stats, and that can cause the structure of the output to break, making it harder to distribute it.
#### Script execution feedback
**Gitlogg** is not a very complex application, but I still made an effort to provide some feedback on what is happening under the hood. Below are some screenshots of dialogs one can expect to see while executing it:
> **รh nรธes!** The path to the folder containing all repositories *does not exist!*
> **รh nรธes!** The path to the folder containing all repositories *exists, but is empty!*
> **Success!** `JSON` parsed, based on **9** different repositories with a total of **25,537** commits.
Note that I've included two huge repos _(*react* & *react-native*, that have 7,813 & 10,065 commits respectively at the time of this writting)_ for the sake of demonstration. The resulting parsed `JSON` file has 715,040 lines. All that done in less than 25 seconds.
_I have successfully compiled **`470`** repositories at once_ (all repos under the organization I work for). Then I got these specs:
* `gitlogg.tmp` generated in `154s` (`~2.57mins`)
* `JSON` output parsed in `2792ms`
* `JSON` file size: `121,5MB`
* Commits processed: `118,117`
* Parsed `JSON` file, lines: `3,307,280`
## Getting started
**Gitlogg** requires [NodeJS][2] and [BabelJS][3].
1. Install `NodeJS` (visit [their page][2] to find the right install for your system).
2. Run `npm run setup`. That will:
* Install `BabelJS` globally by running `npm install babel-cli -g`.
* Install all the local dependencies, through `npm install`.
* Create the directory in which all repos to be parsed to `JSON` will be at (only on **Simple Mode**).
* Create the directories expected by the scripts that output files.
## The `JSON` output
The output will look like this (first commit for **Font Awesome**):
[
{
"repository": "Font-Awesome",
"commit_nr": 1,
"commit_hash": "7ed221e28df1745a20009329033ac690ef000575",
"author_name": "Dave Gandy",
"author_email": "[email protected]",
"author_date": "Fri Feb 17 09:27:26 2012 -0500",
"author_date_relative": "4 years, 3 months ago",
"author_date_unix_timestamp": "1329488846",
"author_date_iso_8601": "2012-02-17 09:27:26 -0500",
"subject": "first commit",
"subject_sanitized": "first-commit",
"stats": " 1 file changed, 0 insertions(+), 0 deletions(-)",
"time_hour": 9,
"time_minutes": 27,
"time_seconds": 26,
"time_gmt": "-0500",
"date_day_week": "Fri",
"date_month_day": 17,
"date_month_name": "Feb",
"date_month_number": 2,
"date_year": "2012",
"date_iso_8601": "2012-02-17",
"files_changed": 1,
"insertions": 0,
"deletions": 0,
"impact": 0
},
{
(...)
},
{
(...)
}
]
Note that many `git log` fields were not printed here, but that's only because I've commented out some of them in the **gitlogg-parse-json.js** script. All the fields below are available. Fields marked with a `*` are either non-standard or not available as placeholders on `--pretty=format:`:
* repository
* commit_nr
commit_hash
commit_hash_abbreviated
tree_hash
tree_hash_abbreviated
parent_hashes
parent_hashes_abbreviated
author_name
author_name_mailmap
author_email
author_email_mailmap
author_date
author_date_RFC2822
author_date_relative
author_date_unix_timestamp
author_date_iso_8601
author_date_iso_8601_strict
committer_name
committer_name_mailmap
committer_email
committer_email_mailmap
committer_date
committer_date_RFC2822
committer_date_relative
committer_date_unix_timestamp
committer_date_iso_8601
committer_date_iso_8601_strict
ref_names
ref_names_no_wrapping
encoding
subject
subject_sanitized
commit_notes
* stats
* time_hour
* time_minutes
* time_seconds
* time_gmt
* date_day_week
* date_month_day
* date_month_name
* date_month_number
* date_year
* date_iso_8601
* files_changed
* insertions
* deletions
* impact
## Creating the `JSON` file
There are two modes and they are basically the same, except that the **Simple Mode** doesn't require configuration. The **Advanced Mode** requires one to set the absolute path to the directory containing all the repositories you'd like to parse to a single `JSON` file.
#### Simple Mode
To simplify the generation process to a point that no configuration is required, follow this directory structure:
gitlogg/ <== This repository's root
โโโ scripts/
โย ย โโโ colors.sh
โย ย โโโ gitlogg-generate-log.sh
โย ย โโโ gitlogg-parse-json.js
โย ย โโโ gitlogg.sh
โโโ _repos/ <== Copy/place/keep your repositories under the folder "_repos/"
โโโ repo1
โโโ repo2
โโโ repo3
โโโ repo4
1. Copy the all the repositories you wish to parse to `JSON` to the `_repos/` folder, as shown above.
2. Granted that you are within the `gitlogg` folder (this repo's root), run:
$ npm run gitlogg
#### Advanced Mode
To generate the `JSON` file based on repositories in any other location, you'll have to define the path to the folder that contains all your repositories.
1. Open [`gitlogg-generate-log.sh`](https://github.com/dreamyguy/gitlogg/blob/master/scripts/gitlogg-generate-log.sh#L4) with an editor of your choice and edit the `yourpath` variable:
# define the absolute path to the directory that contains all your repositories
yourpath=/absolute/system/path/to/directory/that/contains/all/your/repositories/
_**Tip:** drag the folder that contain your repositories to a terminal window, and you'll get the absolute system path to that folder._
2. Granted that you are within the `gitlogg` folder (this repo's root), run:
$ npm run gitlogg
#### Parallel Processing
The parallel processing that was released on [v0.1.8](https://github.com/dreamyguy/gitlogg/tree/v0.1.8) had problems with `xargs` and was temporarily removed. The issue is being dealt with through [pull-request #16](https://github.com/dreamyguy/gitlogg/pull/16).
## The parsed `JSON` file
> Two files will be generated when running `npm run gitlogg`: **`_tmp/gitlogg.tmp`** and **`_output/gitlogg.json`**.
gitlogg/ <== This repository's root
โโโ scripts/
โย ย โโโ colors.sh
โย ย โโโ gitlogg-generate-log.sh
โย ย โโโ gitlogg-parse-json.js
โย ย โโโ gitlogg.sh
โโโ _output/
โย ย โโโ gitlogg.json <== The parsed 'JSON', what we're all after. It's parsed from 'gitlogg.tmp'
โโโ _tmp/
โโโ gitlogg.tmp <== The processed 'git log'
Two files were necessary because of the nature of the script, that loops through all subdirectories and outputs the `git log` for all valid `git` repositories. Once that loop is done, a valid `JSON` file (`gitlogg.json`) is generated out of `gitlogg.tmp`.
`gitlogg.tmp` is just a temporary file from which `gitlogg.json` bases itself on. In case the parsing fails `gitlogg.tmp` can come in handy for debugging.
## Further Notes
#### Debugging
I've created error messages with suggested solutions, to help you get past the most common issues.
However, `git log`'s output can break while it's being processed. That's most certainly caused by fields that allow user input, like _commit messages_. These fields may contain characters (like `\r`) that crash with those reserved for the generation of `gitlogg.tmp`, namely `\n`.
Efforts have been made to mitigate errors by sanitizing characters that have caused errors before, but it might still happen in some edge cases. If it does happen, have a look at the generated `gitlogg.tmp` and see if the expected structure (which is obvious) breaks. Once you have identified the line, have a closer look at the commit and look for an unusual character.
Post an issue with a link to a _gist_ containing your broken `gitlogg.tmp` and I will try to reproduce the error.
#### Documentation
Documentation is done either by:
* Commit messages,
* Commit comments,
* Code comments,
* `README.md` files, like this one.
Some of the initial commits were done deliberately to show what one gets with short commands like `$ git log`. From that initial state commits keep on introducing simplicity or complexity to the code, depending on the work flow. That in itself is a form of documentation. In other words, if you're really that interested in details, there are plenty to be had in the code itself and in its own progressive enhancement.
#### License
[MIT](LICENSE)
#### Disclaimer
This project is by no means the smartest way to parse a `git log` to `JSON`, nor does it aim at becoming so. It is simply a _learn-by-doing_ project in which I experiment with commands available on OSX's Terminal and whatever else I find along the way.
**Gitlogg** was built and tested on OSX. Though an effort has been done to make it cross-platform, there could be errors on other systems.
It's certainly not harmful to your repositories and it won't change any data in it. Having said that, it's served _raw_ and _'as is'_. You may get support, but don't expect it nor take it for granted.
#### Known Issues
There are _no known issues_ at this point. The parallelization that was introduced on [v0.1.8](https://github.com/dreamyguy/gitlogg/tree/v0.1.8) had issues with `xargs`, so its introduction was temporarily reverted until the problem has been dealt with through [pull-request #16](https://github.com/dreamyguy/gitlogg/pull/16). [v0.1.9](https://github.com/dreamyguy/gitlogg/tree/v0.1.9) was released to revert those changes.
The [javascript](https://github.com/dreamyguy/gitlogg/tree/javascript) branch is a very fine piece of programming; you should definitely check it out. I haven't tested it extensively, but found a few issues, which are reported in the [issue tracker](https://github.com/dreamyguy/gitlogg/issues).
The current version [v0.2.1](https://github.com/dreamyguy/gitlogg/tree/v0.2.1) is still quite stable after all these years, with no known issues. Try it! :sparkles:
#### Release History
* 2018-07-12 [v0.2.1](https://github.com/dreamyguy/gitlogg/tree/v0.2.1) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.2.0...v0.2.1)
* Use `ศ` instead of `\0` when replacing `\n` during the extraction of `git log`. `\0` is not as reliable as it seemed.
* The main idea here is to use a character that occurs as seldom as possible - preferably never in `git` context.
* `ศ` (Yogh) is an old English character. If that gives problems, I'll try `ฦฟ` (Wynn), another abandoned English char.
* 2018-07-11 [v0.2.0](https://github.com/dreamyguy/gitlogg/tree/v0.2.0) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.9...v0.2.0)
* Improve console output readability
* Simplify `JSON` format.
* Reduce filesize of output `JSON`, in some scenarios quite dramatically
* Make it importable into `MongoDB`, which is what is being used on **gitlogg-api**
* Use `\0` instead of `รฒ` when replacing `\n` during the extraction of `git log`.
* The main idea here is to use a character that occurs as seldom as possible - preferably never in `git` context.
* 2016-12-15 [v0.1.9](https://github.com/dreamyguy/gitlogg/tree/v0.1.9) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.8...v0.1.9)
* Remove parallelization of processes until the problem with `xargs` has been dealt with.
* 2016-12-14 [v0.1.8](https://github.com/dreamyguy/gitlogg/tree/v0.1.8) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.7...v0.1.8)
* Parse `JSON` through a read/write stream, so we get around the 268MB `Node`'s buffer limitation.
* This limited the whole operation to a number between 173,500 and 174,000 commits.
* Parallelize the generation of `git log` for multiple repos, optionally passing number of processes as a CLI argument.
* Mitigate encoding problems caused by `ISO-8859-1` characters not being properly encoded to `UTF-8`.
* 2016-11-21 [v0.1.7](https://github.com/dreamyguy/gitlogg/tree/v0.1.7) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.6...v0.1.7)
* Better readability for 'Release History'
* Correct url to logo, so it also renders outside Github
* Rename sub-folder 'gitlogg' to 'scripts' to avoid confusion
* Simplify initial setup and running of 'gitlogg'
* Set vars instead of hardcoding values
* Separate scripts from output files
* Introduce 'Debugging' as a 'Further Notes' item
* Tip on how to get the absolute system path to a directory
* Introduce 'View Changes' links under 'Release History'
* 2016-11-19 [v0.1.6](https://github.com/dreamyguy/gitlogg/tree/v0.1.6) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.5...v0.1.6)
* Introduce `commit_nr`, a commit count within each repo
* Show how many repos are about to be processed on console
* Show what repo is being processed on console
* Replace carriage return with space
* 2016-06-12 [v0.1.5](https://github.com/dreamyguy/gitlogg/tree/v0.1.5) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.4...v0.1.5)
* Introduce logo
* Correct wrong reference to 'yourpath'
* Output numbers instead of strings
* 2016-05-23 [v0.1.4](https://github.com/dreamyguy/gitlogg/tree/v0.1.4) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.3...v0.1.4)
* Fix a bug that would break the output in some rare cases
* 2016-05-21 [v0.1.3](https://github.com/dreamyguy/gitlogg/tree/v0.1.3) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.2...v0.1.3)
* Even better error handling
* 2016-05-21 [v0.1.2](https://github.com/dreamyguy/gitlogg/tree/v0.1.2) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.1...v0.1.2)
* Better error handling
* 2016-05-21 [v0.1.1](https://github.com/dreamyguy/gitlogg/tree/v0.1.1) - [View Changes](https://github.com/dreamyguy/gitlogg/compare/v0.1.0...v0.1.1)
* The 'gitlogg' release, the node-based JSON generation
* 2016-05-20 [v0.1.0](https://github.com/dreamyguy/gitlogg/tree/v0.1.0)
* The 'git-log-to-json' release, now considered legacy
-------------
> _Brought to you by [Wallace Sidhrรฉe][1]._
[1]: http://sidhree.com/ "Wallace Sidhrรฉe"
[2]: https://nodejs.org/en/ "NodeJS"
[3]: https://babeljs.io/ "BabelJS"