CycloneDX CocoaPods (Objective-C/Swift)

The CycloneDX CocoaPods Gem creates a valid CycloneDX software bill-of-material document from all CocoaPods project dependencies. CycloneDX is a lightweight BoM specification that is easily created, human readable, and simple to parse.

Installation

From RubyGems

% gem install cyclonedx-cocoapods

From Source

First, clone/copy the source code from GitHub. Then in the source code directory run these commands (substituting the actual version number for x.x.x):

gem build cyclonedx-cocoapods.gemspec
gem install cyclonedx-cocoapods-x.x.x.gem

Building from source requires Ruby 2.4.0 or newer.

Compatibility

cyclonedx-cocoapods aims to produce SBOMs according to the latest CycloneDX specification, which currently is 1.5. You can use the CycloneDX CLI to convert between multiple BOM formats or specification versions.

Usage

Generates a BOM with the given parameters. BOM component metadata is only generated if the component's name, version, and type are provided using the --name, --version, and --type parameters.
[version <version_number>]

USAGE
  cyclonedx-cocoapods [options]

OPTIONS
        --[no-]verbose               Show verbose debugging output
    -h, --help                       Show help message

  BOM Generation
    -p, --path path                  Path to CocoaPods project directory (default: current directory)
    -o, --output bom_file_path       Path to output the bom.xml file to (default: "bom.xml")
    -b, --bom-version bom_version    Version of the generated BOM (default: "1")
    -x, --exclude-test-targets       Eliminate Podfile targets whose name contains the word "test"
    -s, --shortened-strings length   Trim author, publisher, and purl to <length> characters; this may cause data loss but can improve compatibility with other systems

  Component Metadata
    -n, --name name                  (If specified version and type are also required) Name of the component for which the BOM is generated
    -v, --version version            Version of the component for which the BOM is generated
    -t, --type type                  Type of the component for which the BOM is generated (one of application|framework|library|container|operating-system|device|firmware|file)
    -g, --group group                Group of the component for which the BOM is generated

Output: BoM file at specified location, ./bom.xml if not specified

Example

% cyclonedx-cocoapods --path /path/to/cocoapods/project --output /path/to/bom.xml --version 6 

Specific example

This repo contains a file named example_bom.xml that was generated with this tool.

It represents the open source PodsUpdater application. The PodsUpdater code was checked out, then these two commands were run in the checked out code directory.

% pod install
% cyclonedx-cocoapods -n "kizitonwose/PodsUpdater" -v 1.0.3 -t application --output example_bom.xml

A Note About CocoaPod Subspecs

Many CocoaPods make use of subspec functionality. Podfiles can require whole pods, or just subspecs; pods themselves may require whole pods or subspecs of other pods. In complex projects such as React Native apps this often results in a single pod being included as a dependency multiple times as several of its subspecs are included individually.

cyclonedx-cocoapods works properly with this, and adds a dependency in the BOM output for each subspec that is required by the Podfile and throughout the chain of dependencies. Each subspec will only appear once in the BOM file. This gives you granular detail in the BOM of which subspecs of which pods are used. This is easiest seen with an example.

The Podfile

target 'SampleProject' do
  pod 'SamplePod/firstsubspec'
  pod 'SamplePod/secondsubspec'
end

If the SamplePod is at v2.1, running cyclonedx-cocoapods on this will output a BOM file with two component dependencies:

• pkg:cocoapods/[email protected]#firstsubspec at https://github.com/example/SamplePod
• pkg:cocoapods/[email protected]#secondsubspec at https://github.com/example/SamplePod

Dependency Track (DT) is a tool that many organizations use to help automate SBOM related tasks. When uploading an SBOM that contains multiple subspecs from the same pod, or a single subspec alongside the complete pod dependency, the initial upload will indicate a number of dependencies equal to the number of component objects within the BOM. However, DT analysis then looks for unique repositories in use which will merge all of the subspecs of a particular pod into a single entry. On later uploads to DT of the same or similar BOM it will indicate just the number of unique repositories.

Uploading the above SamplePod BOM file to DT will initially see two dependencies. Later analysis by DT notices that both dependencies resolve to the same repository, so DT will then only show a single dependency.

Contributing

To set up for local development, make a fork of this repo, make a branch on your fork named after the issue or workflow you are improving, checkout your branch, then run bundle install.

Right to Contribute

This project runs the DCO checker to validate that the code author has the right to submit the code they are contributing to the project. Please verify that you do have the right to contribute, then when running git commit add the -s flag to automatically add the proper Signed-off-by line to the commit message.

Pull requests

Before submitting your pull request, please do the following:

• Run rake spec and make sure all the tests pass. If you are adding new commands or features, they must include tests. If you are changing functionality, update the tests or add new tests as needed.
• Add a note to the CHANGELOG describing what you changed.
• Make your pull request. If it is related to an issue, add a link to the issue in the description.

Copyright & License

Permission to modify and redistribute is granted under the terms of the Apache 2.0 license. See the LICENSE file for the full license.