Improve documentation (#525)

* Make installation methods more obvious

Signed-off-by: Dan Luhring <dan.luhring@anchore.com>

* Create linkable section headers

Signed-off-by: Dan Luhring <dan.luhring@anchore.com>

* Add badge for joining Slack

Signed-off-by: Dan Luhring <dan.luhring@anchore.com>

* Document requirement for signed commits

Signed-off-by: Dan Luhring <dan.luhring@anchore.com>
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Dan Luhring 2021-10-04 09:29:27 -04:00 committed by GitHub
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# Contributing to `syft`
# Contributing to Syft
If you are looking to contribute to this project and want to open a Github pull request ("PR"), there are a few guidelines of what we are looking for in patches. Make sure you go through this document and ensure that your code proposal is aligned.
If you are looking to contribute to this project and want to open a GitHub pull request ("PR"), there are a few guidelines of what we are looking for in patches. Make sure you go through this document and ensure that your code proposal is aligned.
## Sign your work
## Sign off your work
The `sign-off` is an added line at the end of the explanation for the commit, certifying that you wrote it or otherwise have the right to submit it as an open-source patch. By submitting a contribution, you agree to be bound by the terms of the DCO Version 1.1 and Apache License Version 2.0.
Signing a commit certifies the below Developer's Certificate of Origin (DCO):
Signing off a commit certifies the below Developer's Certificate of Origin (DCO):
```text
Developer's Certificate of Origin 1.1
@ -51,13 +51,13 @@ $ git config --global user.name "John Doe"
$ git config --global user.email "john.doe@example.com"
```
Creating a signed commit is then possible with `-s`:
Creating a signed-off commit is then possible with `-s` or `--signoff`:
```text
$ git commit -s -m "this is a commit message"
```
To double check if the commit was signed, look at the log output:
To double-check that the commit was signed-off, look at the log output:
```text
$ git log -1
@ -82,6 +82,11 @@ Date: Mon Aug 1 11:27:13 2020 -0400
[//]: # (TODO: PR title and description)
## Sign your commits
To ensure the authenticity and integrity of code contributions, **we require that all commits are signed**. Signing commits proves that your commits were truly created by you, as the holder of a private key.
Configuring git to sign your commits is a straightforward process. To get set up, see [GitHub's documentation on signing commits](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits).
## Test your changes

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[![Validations](https://github.com/anchore/syft/actions/workflows/validations.yaml/badge.svg)](https://github.com/anchore/syft/actions/workflows/validations.yaml)
[![Go Report Card](https://goreportcard.com/badge/github.com/anchore/syft)](https://goreportcard.com/report/github.com/anchore/syft)
[![GitHub release](https://img.shields.io/github/release/anchore/syft.svg)](https://github.com/anchore/syft/releases/latest)
[![License: Apache-2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/anchore/syft/blob/main/LICENSE)
[![GitHub go.mod Go version](https://img.shields.io/github/go-mod/go-version/anchore/syft.svg)](https://github.com/anchore/syft)
[![License: Apache-2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/anchore/syft/blob/main/LICENSE)
[![Slack Invite](https://img.shields.io/badge/Slack-Join-blue?logo=slack)](https://anchore.com/slack)
A CLI tool and go library for generating a Software Bill of Materials (SBOM) from container images and filesystems. Exceptional for vulnerability detection when used with a scanner tool like [Grype](https://github.com/anchore/grype).
@ -28,6 +29,27 @@ Well have free swag, giveaways, snacks, and sips. Space will be limited, so m
If you encounter an issue, please [let us know using the issue tracker](https://github.com/anchore/syft/issues).
## Installation
### Recommended
```bash
curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin
```
...or, you can specify a release version and destination directory for the installation:
```
curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b <DESTINATION_DIR> <RELEASE_VERSION>
```
### Homebrew
```bash
brew tap anchore/syft
brew install syft
```
**Note**: Currently, Syft is built only for macOS and Linux.
## Getting started
To generate an SBOM for a Docker or OCI image:
@ -47,7 +69,10 @@ To include software from all image layers in the SBOM, regardless of its presenc
syft packages <image> --scope all-layers
```
### Supported sources
Syft can generate a SBOM from a variety of sources:
```
# catalog a container image archive (from the result of `docker image save ...`, `podman save ...`, or `skopeo copy` commands)
syft packages path/to/image.tar
@ -57,6 +82,7 @@ syft packages path/to/dir
```
Sources can be explicitly provided with a scheme:
```
docker:yourrepo/yourimage:tag use images from the Docker daemon
docker-archive:path/to/yourimage.tar use a tarball from disk for archives created from "docker save"
@ -66,7 +92,10 @@ dir:path/to/yourproject read directly from a path on disk (any di
registry:yourrepo/yourimage:tag pull image directly from a registry (no container runtime required)
```
### Output formats
The output format for Syft is configurable as well:
```
syft packages <image> -o <format>
```
@ -79,23 +108,6 @@ Where the `format`s available are:
- `spdx-json`: A JSON report conforming to the [SPDX 2.2 JSON Schema](https://github.com/spdx/spdx-spec/blob/v2.2/schemas/spdx-schema.json).
- `table`: A columnar summary (default).
## Installation
**Recommended (macOS and Linux)**
```bash
# install the latest version to /usr/local/bin
curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin
# install a specific version into a specific dir
curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b <SOME_BIN_PATH> <RELEASE_VERSION>
```
**Homebrew (macOS)**
```bash
brew tap anchore/syft
brew install syft
```
## Configuration
Configuration search paths: