Adds problem-matcher (#20)

* Adds problem-matcher

* Fix issue

* match as group 1

* use message

* Limit output

* remove testfile

.github/problem-matcher.json

@@ -0,0 +1,22 @@
+{
+    "problemMatcher": [
+      {
+        "owner": "shellcheck",
+        "pattern": [
+          {
+              "regexp": "^In\\s(.+)\\sline\\s(\\d+):$",
+              "file": 1,
+              "line": 2
+          },
+          {
+            "regexp": ".*"
+          },
+          {
+              "regexp": "(SC\\d+):\\s(.+)$",
+              "code": 1,
+              "message": 2
+          }
+      ]
+      }
+    ]
+  }

runaction

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+## Enable problem matcher
+echo "::add-matcher::.github/problem-matcher.json"
+
 cd "$GITHUB_WORKSPACE" || exit 1
 
 declare statuscode

testfiles/ignore/ignore.sh

@@ -1,3 +1,5 @@
 #!/bin/sh
 
-echo $test
+echo $test $test
+
+echo $test2