fix: Fix problem matcher (#14)

* Add problem matcher

* Fix loading tar file from artifacts

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "daily"
+- package-ecosystem: "docker"
+  directory: "/"
+  schedule:
+    interval: "daily"

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
           name: action-image
 
       - name: Load image into docker context
-        run: docker load -i action-image/action.tar
+        run: docker load -i action.tar
 
       - name: Get Image Name
         id: image_name

Dockerfile

@@ -1,6 +1,6 @@
 FROM hadolint/hadolint:v1.17.5-alpine
 
-COPY LICENSE README.md /
-
-ENTRYPOINT [ "hadolint" ]
+COPY LICENSE README.md problem-matcher.json /
+COPY hadolint.sh /usr/local/bin/hadolint.sh
 
+ENTRYPOINT [ "/usr/local/bin/hadolint.sh" ]

hadolint.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# The problem-matcher definition must be present in the repository
+# checkout (outside the Docker container running hadolint). We create
+# a temporary folder and copy problem-matcher.json to it and make it
+# readable.
+TMP_FOLDER=$(mktemp -d -p .)
+cp /problem-matcher.json "${TMP_FOLDER}"
+chmod -R a+rX "${TMP_FOLDER}"
+trap "rm -rf \"${TMP_FOLDER}\"" EXIT
+
+echo "::add-matcher::${TMP_FOLDER}/problem-matcher.json"
+
+hadolint "$@"

problem-matcher.json

@@ -0,0 +1,15 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "hadolint",
+      "pattern": [
+        {
+          "regexp": "(.*)\\:(\\d+)\\s(.*)",
+          "file": 1,
+          "line": 2,
+          "message": 3
+        }
+      ]
+    }
+  ]
+}