Use VSCode plugin's problem matchers

.github/elixir.json

@@ -1,29 +1,44 @@
 {
   "problemMatcher": [
     {
-      "owner": "elixir",
+      "owner": "elixir-mixCompileError",
+      "severity": "error",
       "pattern": [
         {
-          "regexp": "^(\\*\\* \\(.*\\) )?((.:)?[^:]*):(\\d+)(:(\\d+))?: (.*)$",
+          "regexp": "^\\*\\* \\((\\w+)\\) (.*):(\\d+): (.*)$",
           "file": 2,
-          "line": 4,
+          "location": 3,
-          "column": 6,
+          "message": 0
-          "message": 7
         }
       ]
     },
     {
-      "owner": "elixir-warning",
+      "owner": "elixir-mixCompileWarning",
+      "severity": "warning",
       "pattern": [
         {
-          "regexp": "^(warning: (.*))$",
+          "regexp": "^warning: (.*)$",
-          "message": 2
+          "message": 1
         },
         {
-          "regexp": "^(  )((.:)?[^:]*):(\\d+)(:(\\d+))?$",
+          "regexp": "^  (.*):(\\d+).*$",
-          "file": 2,
+          "file": 1,
-          "line": 4,
+          "location": 2
-          "column": 6
+        }
+      ]
+    },
+    {
+      "owner": "elixir-mixTestFailure",
+      "severity": "error",
+      "pattern": [
+        {
+          "regexp": "^\\s*\\d+\\) (.*)$",
+          "message": 1
+        },
+        {
+          "regexp": "^\\s*(.*):(\\d+)$",
+          "file": 1,
+          "location": 2
         }
       ]
     }

MATCHER_NOTICE.md

@@ -0,0 +1,24 @@
+Problem matchers in [elixir.json](.github/elixir.json) are adapted from https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/package.json,
+available under the [MIT license](https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/LICENSE.md):
+
+MIT License
+
+Copyright (c) 2016 Mathew McLoughlin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -126,6 +126,10 @@ if System.get_env("GITHUB_ACTIONS") do
 end
 ```
 
+## Matchers
+
+The problem matchers in this repository are adapted from [here](https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/package.json). See [MATCHER_NOTICE](MATCHER_NOTICE.md) for license details.
+
 ## License
 
 The scripts and documentation in this project are released under the [MIT license](LICENSE.md).

dist/.github/elixir.json

@@ -1,29 +1,44 @@
 {
   "problemMatcher": [
     {
-      "owner": "elixir",
+      "owner": "elixir-mixCompileError",
+      "severity": "error",
       "pattern": [
         {
-          "regexp": "^(\\*\\* \\(.*\\) )?((.:)?[^:]*):(\\d+)(:(\\d+))?: (.*)$",
+          "regexp": "^\\*\\* \\((\\w+)\\) (.*):(\\d+): (.*)$",
           "file": 2,
-          "line": 4,
+          "location": 3,
-          "column": 6,
+          "message": 0
-          "message": 7
         }
       ]
     },
     {
-      "owner": "elixir-warning",
+      "owner": "elixir-mixCompileWarning",
+      "severity": "warning",
       "pattern": [
         {
-          "regexp": "^(warning: (.*))$",
+          "regexp": "^warning: (.*)$",
-          "message": 2
+          "message": 1
         },
         {
-          "regexp": "^(  )((.:)?[^:]*):(\\d+)(:(\\d+))?$",
+          "regexp": "^  (.*):(\\d+).*$",
-          "file": 2,
+          "file": 1,
-          "line": 4,
+          "location": 2
-          "column": 6
+        }
+      ]
+    },
+    {
+      "owner": "elixir-mixTestFailure",
+      "severity": "error",
+      "pattern": [
+        {
+          "regexp": "^\\s*\\d+\\) (.*)$",
+          "message": 1
+        },
+        {
+          "regexp": "^\\s*(.*):(\\d+)$",
+          "file": 1,
+          "location": 2
         }
       ]
     }