This tutorial helps you use the bootstrap command to create a new project for a Java code base.
In this tutorial you will create a snapshot to allow you to analyze the Apache Maven code base. Apache Maven is a software project management and comprehension tool.
The tutorial covers basic use of the
odasa bootstrap tool to retrieve source files, start code analysis and export a snapshot of the project.
Time needed: 10–15 minutes
This tutorial assumes:
- You have installed Semmle's analysis software—see Installing Semmle Core.
- You have set up the environment for Semmle Core—see Setting up the environment.
- You have installed Git and added it to your path – see http://git-scm.com/book/en/Getting-Started-Installing-Git.
- You have installed the JDK. The JRE is not sufficient to build Maven.
- You have installed Apache Maven – see http://maven.apache.org/download.cgi.
Create a new project with odasa bootstrap
The quickest way to create a new Semmle analysis project is to use the
odasa bootstrap command. The bootstrap tool steps you through the process and generates configuration files that you can reuse later. The process described here gives the steps required to analyze a particular Java project built using Maven. Other projects will require different responses to some of the bootstrap prompts.
The bootstrap tool's on-screen instructions indicate what you should enter at each step. However, the first time you run it, you may find it useful to refer to the following procedure for some additional information.
Open a command console.
- Change to the directory where Semmle Core is installed – for example,
- Make sure the environment is set up correctly:
Linux and OS X:
See Setting up the environment.
Enter the following command to start the bootstrap tool:
The tool guides you through the rest of the process. The remainder of the steps provided below give some additional guidance that you may find useful the first time you run the bootstrap tool.
For additional on-screen information, enter
?at any of the prompts.
Project languageThe Maven project is written in Java.
- Make sure to enter a lowercase
jfor Java and not an uppercase
- The languages listed here depend on your Semmle license and the version of the Semmle software you have installed. You may, therefore, see a different selection of languages than the list shown here.
- Make sure to enter a lowercase
The Maven project uses Git as the version control system for its source code.
The Maven project stores its source code in GitHub.
bootstraptool with the URL of the repository makes it possible to automatically download the latest version of the software each time an analysis is triggered.
Press Enter without specifying a branch name.
The bootstrap tool will default to cloning the code from the "master" branch for the project.
When you run Semmle analysis, the software determines which files to analyze (and which libraries are needed) by monitoring the build process. The system therefore needs to be able to build the code. You can tell the
bootstraptool that you want to use a specific build tool (
Otherto specify another tool). If you choose one of these options, subsequent steps will ask you to provide the specifics of the build instructions for the tool you have chosen.
Alternatively, you can let the
autoBuildtool work out the build instructions for you.
We will use
autoBuildto build the code for us.
autoBuildis designed to make project configuration easy and should be your first choice as the build command for Java projects.
Creating a snapshot
You have now supplied all the information needed for the project file that is used each time a snapshot is generated. You can now go ahead and create a snapshot.
This tells the bootstrap tool that you want to clone the current Maven source files from GitHub and generate files needed to build a Semmle snapshot. This command will be run at the end of the bootstrap process.
Running a set of analyses
This tells the bootstrap tool that you want to run a set of queries to analyze the snapshot. This command will be run at the end of the bootstrap process.
Specifying an analysis suite
If you press Enter without specifying a suite the bootstrap tool will run the standard set of Java queries.
Alternatively, you can tell the bootstrap tool to run the same queries that are run on LGTM by specifying the LGTM query suite for Java:
Exporting the database archive
This tells the bootstrap tool to create a zip archive containing a snapshot in your project directory. This command will be run at the end of the bootstrap process.
The bootstrap tool now:
- Clones the current Maven source files from GitHub, and generates files needed to build the snapshot.
- Indexes the code base, builds a snapshot, performs Java analysis, and saves the results of the analysis in a SARIF results file in the project directory.
- Exports the snapshot as a zip archive. You can use this snapshot to run queries in your IDE, for example using the QL for Eclipse plugin.
Completing these operations will take a few minutes.
When the bootstrap tool finishes, it displays a message like this:
Now you can view the analysis results in a SARIF viewer, or import the snapshot database into your IDE and run additional analyses.
If error messages are reported, you can investigate the problem by reviewing the log files:
Before rerunning the bootstrap process, enable prototyping mode. This will help with any further troubleshooting you need to do.
Spend some time investigating the analysis of the Maven code base. This will help you familiarize yourself with the standard rules available for Java analysis.
Query the snapshot in your IDE
If you install a QL plugin or extension, you can easily write custom queries to analyze snapshots and view the results directly in your IDE.
Create more snapshots
Use the bootstrap tool to create a project for your own code base.
Work through the tutorial on advanced project creation to see some examples of the available configuration options.