Update documentation to show SPDX support (anchore#452)

wagoodman · web-flow · commit fee74d57b87f · 2021-07-01T14:52:57.000Z
* add docs for spdx support

Signed-off-by: Alex Goodman &lt;alex.goodman@anchore.com&gt;

* copy updates for format options

Signed-off-by: Alex Goodman &lt;alex.goodman@anchore.com&gt;
diff --git a/README.md b/README.md
@@ -83,7 +83,9 @@ syft packages <image> -o <format>
 Where the `format`s available are:
 - `json`: Use this to get as much information out of Syft as possible!
 - `text`: A row-oriented, human-and-machine-friendly output.
-- `cyclonedx`: A XML report conforming to the [CycloneDX 1.2](https://cyclonedx.org/) specification.
+- `cyclonedx`: A XML report conforming to the [CycloneDX 1.2 specification](https://cyclonedx.org/specification/overview/).
+- `spdx`: A tag-value formatted report conforming to the [SPDX 2.2 specification](https://spdx.github.io/spdx-spec/).
+- `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
diff --git a/cmd/packages.go b/cmd/packages.go
@@ -28,7 +28,9 @@ import (
 const (
 	packagesExample = `  {{.appName}} {{.command}} alpine:latest                a summary of discovered packages
   {{.appName}} {{.command}} alpine:latest -o json        show all possible cataloging details
-  {{.appName}} {{.command}} alpine:latest -o cyclonedx   show a CycloneDX SBOM
+  {{.appName}} {{.command}} alpine:latest -o cyclonedx   show a CycloneDX formatted SBOM
+  {{.appName}} {{.command}} alpine:latest -o spdx        show a SPDX 2.2 tag-value formatted SBOM
+  {{.appName}} {{.command}} alpine:latest -o spdx-json   show a SPDX 2.2 JSON formatted SBOM
   {{.appName}} {{.command}} alpine:latest -vv            show verbose debug information
 
   Supports the following image sources:
