feat: add ignore-policy option to filter vulnerabilities (#48)

* feat: add ignore-policy option to filter vulnerabilities

* fix: format README

README.md

@@ -291,6 +291,7 @@ Following inputs can be used as `step.with` keys:
 | `skip-dirs`       | String  |                                   | Comma separated list of directories where traversal is skipped |
 | `cache-dir`      | String  |                                    | Cache directory                               |
 | `timeout`        | String  | `2m0s`                             | Scan timeout duration                         |
+| `ignore-policy`  | String  |                                    | Filter vulnerabilities with OPA rego language |
 
 [release]: https://github.com/aquasecurity/trivy-action/releases/latest
 [release-img]: https://img.shields.io/github/release/aquasecurity/trivy-action.svg?logo=github

action.yaml

@@ -57,6 +57,10 @@ inputs:
     description: 'timeout (default 2m0s)'
     required: false
     default: ''
+  ignore-policy:
+    description: 'filter vulnerabilities with OPA rego language'
+    required: false
+    default: ''
 runs:
   using: 'docker'
   image: "Dockerfile"
@@ -75,3 +79,4 @@ runs:
     - '-l ${{ inputs.input }}'
     - '-m ${{ inputs.cache-dir }}'
     - '-n ${{ inputs.timeout }}'
+    - '-o ${{ inputs.ignore-policy }}'

entrypoint.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-while getopts "a:b:c:d:e:f:g:h:i:j:k:l:m:n:" o; do
+while getopts "a:b:c:d:e:f:g:h:i:j:k:l:m:n:o:" o; do
    case "${o}" in
        a)
          export scanType=${OPTARG}
@@ -44,6 +44,9 @@ while getopts "a:b:c:d:e:f:g:h:i:j:k:l:m:n:" o; do
        n)
          export timeout=${OPTARG}
        ;;
+       o)
+         export ignorePolicy=${OPTARG}
+       ;;
   esac
 done
 
@@ -92,6 +95,9 @@ fi
 if [ $timeout ];then
   ARGS="$ARGS --timeout $timeout"
 fi
+if [ $ignorePolicy ];then
+  ARGS="$ARGS --ignore-policy $ignorePolicy"
+fi
 
 echo "Running trivy with options: " --no-progress "${ARGS}" "${artifactRef}"
 trivy ${scanType} --no-progress $ARGS ${artifactRef}