GitMiner

Copyright (c) 2011-2012 by IBM and the University of Nebraska-Lincoln

By Patrick Wagstrom <patrick@wagstrom.net> and Corey Jergenson <corey.jergensen@gmail.com>

This project is from a joint research project between IBM Research and the University of Nebraska-Lincoln. Under the terms of that agreement all output from this project must be distributed under the terms of the [Apache License][license].

Compilation

This project uses Apache Maven to manage all dependencies and versioning. The simplest way to get going is to run the following command:

mvn clean compile package assembly:single

Configuration

GitMiner has many different properties that can be set to alter the behavior of the program. The following is a simple configuration file that will be enough to get you going. Copy this data to a file and name it something like configuration.properties in the root directory of your GitMiner install.

net.wagstrom.research.github.login=YOURGITHUBLOGIN
net.wagstrom.research.github.password=YOURGITHUBPASSWORD
net.wagstrom.research.github.email=YOUREMAILADDRESS

net.wagstrom.research.github.dbengine=neo4j
net.wagstrom.research.github.dburl=graph.db

net.wagstrom.research.github.projects=pridkett/gitminer

Alternatively, you may authenticate by using an OAuth token to be configured as follows in lieu of giving login and password.

net.wagstrom.research.github.token=YOUROAUTHTOKEN

See http://developer.github.com/v3/oauth/ for more information.

If you plan on using the Git Repository loading functionality then you'll need to set the following options that are specific to that functionality. In the future these options will be merged together, but for right now you'll just need to repeat them.

edu.unl.cse.git.dbengine=neo4j
edu.unl.cse.git.dburl=graph.db
edu.unl.cse.git.repositories=pridkett/gitminer

Execution

Execution of GitMiner is a two step process that consists of first using the GitHub API to download project data and then later using git directly to process project source code commits. The configuration file created in the last step has all the settings you'll need for stages.

To begin, run GitMiner so it downloads data from using the GitHub API:

./gitminer.sh -c configuration.properties

Next, use the repository loader functions of GitMiner to download the source code history for the projects.

./repo-loader.sh -c configuration.properties

Configuration Parameters

For the most part we have attempted to provide sensible defaults for configuration parameters, however some parameters must have their values set for the tool to function.

• name: net.wagstrom.research.github.login<br> default: no default<br> description: this parameter must be set. On October 14, 2012 [GitHub changed the way their API works][gh-api-limit] and reduced the number of anonymous API requests to 60/hour. With this parameter set you can get as many as 5000 requests an hour. Without this parameter GitMiner will just refuse to run.

• name: net.wagstrom.research.github.password<br> default: no default<br> description: the companion to net.wagstrom.research.github.login.

• name: net.wagstrom.research.github.token<br> default: no default<br> description: this can be set instead of login and password to authenticate with GitHub using the given OAuth token as documented on http://developer.github.com/v3/oauth/.

• name: net.wagstrom.research.github.email<br> default: no default<br> description: this is your email address. GitHub has requested that all clients using the API provide additional mechanisms to identify themselves via the user-agent. One of the ways that GitMiner accomplishes this is by putting your email address in the user-agent string. Please be nice and set this value accordingly.

• name: net.wagstrom.research.github.projects<br> default: no default<br> description: a comma separated list of projects to begin spidering. For example rails/rails,pridkett/gitminer,tinkerpop/blueprints.

• name: net.wagstrom.research.github.users<br> default: no default<br> description: a comma separated list of users to spider. For example pridkett,jurgns,dhh.

• name: net.wagstrom.research.github.organizations<br> default: no default<br> description: a comma separated list of organizations to spider. For example, 37signals,tinkerpop.

• name: net.wagstrom.research.github.refreshTime<br> default: 0.0<br> description: minimum number of days since the last update to download information about a user or other element again. For most purposes you can probably set this much higher. This will GREATLY speed up your crawls if you set it to a high value.

• name: net.wagstrom.research.github.apiThrottle.maxCalls.v3<br> default 4980<br> description: The maximum number of calls via the GitHub v3 API in a given time period. Use this to rate limit under what the API says. I typically set this value to 4980 or something like that to avoid problems when I hit API limits. If the value is 0 then this is ignored.

• name: net.wagstrom.research.github.apiThrottle.maxCallsInterval.v3<br> default: 3600<br> description: Time period (in seconds) to make the maximum number of calls using the v3 GitHub API. Previously some APIs allowed 60calls/min and others 5000/hr, but the API didn't set this. Now it seems to always be 5000/hr, so this is generally set to 3600.

• name: net.wagstrom.research.github.miner.repositories<br> default: true<br> description: a true/false parameter on whether or not to download data for the projects specified in net.wagstrom.research.github.users property.

• name: net.wagstrom.research.github.miner.repositories.collaborators<br> default: true<br> description: a true/false parameter on whether or not to downlaod data for the collaborators listed for each project.

• name: net.wagstrom.research.github.miner.repositories.contributors<br> default: true<br> description: a true/false parameter on whether or not to download data for the contributors listed for each project.

• name: net.wagstrom.research.github.miner.repositories.watchers<br> default: true<br> description: a true/false parameter for whether or not to download data for the watchers listed for each project.

• name: net.wagstrom.research.github.miner.repositories.forks<br> default: true<br> description: a true/false parameter for whether or not to download data about forks for each project.

• name: net.wagstrom.research.github.miner.repositories.issues<br> default: true<br> description: a true/false parameter for whether or not to download data about issues for each project.

• name: net.wagstrom.research.github.miner.repositories.pullrequests<br> default: true<br> description: a true/false parameter for whether or not to download data about pull requests for each project.

• name: net.wagstrom.research.github.miner.repositories.users<br> default: true<br> description: a true/false parameter for whether or not to download all the data about all the users for each project. FIXME: I'm not certain off the top of my head about what interplay this has with other settings above.

• name: net.wagstrom.research.github.miner.users.events<br> default: true<br> description: a true/false parameter for whether or not to download the public events stream for each user mined.

• name: net.wagstrom.research.github.miner.users.gists<br> default: true<br> description: a true/false parameter for whether or not to download the set of gists for each user mined.

• name: net.wagstrom.research.github.miner.users<br> default: true<br> description: a true/false parameter for whether or not to download any information for the users listed in net.wagstrom.research.github.users.

• name: net.wagstrom.research.github.miner.organizations<br> default: true<br> description: a true/false parameter for whether or not to download any information for the organizations listed in net.wagstrom.research.github.organizations.

• name: net.wagstrom.research.github.miner.gists<br> default: true<br> description: a true/false parameter for whether or not to download any gists at all.

• name: net.wagstrom.research.github.dbengine<br> default: neo4j<br> description: the name of the [Blueprints][blueprints] database backend to use. Right now this has only been tested on neo4j, orientdb, and tinkergraph. This feature is dependent on the features present in [govscigraph][govscigraph].

• name: net.wagstrom.research.github.dburl<br> default: github.db<br> description: the URL of the database to save to. For neo4j this is simply the directory where the database exists.

Java Options

In some cases, for some repositories, substantial java memory is required.
In these cases, setting the java memory as follows seems to work. *this fixes ISSUE 34

export JAVA_OPTIONS="-Xms12g -Xmx12g"

sample data

If you'd like to see the output of gitminer without having to execute it, we have made two full datasets available on github.

• [gitminer-data-rails][gitminer-data-rails]: a scrape of the rails ecosystem from the month of May 2012
• [gitminer-data-tinkerpop][gitminer-data-tinkerpop]: a scrape of the projects in the tinkerpop stack from the month of May 2012

[gh-api-limit]: