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grype/DEVELOPING.md
Alex Goodman b2715ffdba
Update high level docs (#162) 
* move dev section to separate doc; generally update readme

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* remove line breaks from docs

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
2020-09-25 14:06:10 -04:00

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Developing

There are a few useful things to know before diving into the codebase. This project depends on a few things being available like a vulnerability database, which you might want to create manually instead of retrieving a released version.

Getting started

After cloning do the following:

  1. run make bootstrap to download go mod dependencies, create the /.tmp dir, and download helper utilities.
  2. run make to run linting, tests, and other verifications to make certain everything is working alright.

Checkout make help to see what other actions you can take.

Inspecting the database

The currently supported database format is Sqlite3. Install sqlite3 in your system and ensure that the sqlite3 executable is available in your path. Ask grype about the location of the database, which will be different depending on the operating system:

$ go run main.go db status
Location:  /Users/alfredo/Library/Caches/grype/db
Built:  2020-07-31 08:18:29 +0000 UTC
Current DB Version:  1
Require DB Version:  1
Status: Valid

The database is located within the XDG_CACHE_HOME path. To verify the database filename, list that path:

# OSX-specific path
$ ls -alh  /Users/alfredo/Library/Caches/grype/db
total 445392
drwxr-xr-x  4 alfredo  staff   128B Jul 31 09:27 .
drwxr-xr-x  3 alfredo  staff    96B Jul 31 09:27 ..
-rw-------  1 alfredo  staff   139B Jul 31 09:27 metadata.json
-rw-r--r--  1 alfredo  staff   217M Jul 31 09:27 vulnerability.db

Next, open the vulnerability.db with sqlite3:

$ sqlite3 /Users/alfredo/Library/Caches/grype/db/vulnerability.db

To make the reporting from Sqlite3 easier to read, enable the following:

sqlite> .mode column
sqlite> .headers on

List the tables:

sqlite> .tables
id                      vulnerability           vulnerability_metadata

In this example you retrieve a specific vulnerability from the nvd namespace:

sqlite> select * from vulnerability where (namespace="nvd" and package_name="libvncserver") limit 1;
id             record_source  package_name  namespace   version_constraint  version_format  cpes                                                         proxy_vulnerabilities
-------------  -------------  ------------  ----------  ------------------  --------------  -----------------------------------------------------------  ---------------------
CVE-2006-2450                 libvncserver  nvd         = 0.7.1             unknown         ["cpe:2.3:a:libvncserver:libvncserver:0.7.1:*:*:*:*:*:*:*"]  []