Initial version of job

.github/android-lint-file-matcher.json

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+{
+  // Example:
+  // /path/to/file/file.class: Warning: checkClientTrusted is empty, which could cause insecure network traffic due to trusting arbitrary TLS/SSL certificates presented by peers [TrustAllX509TrustManager]
+  "problemMatcher": [
+    {
+      "owner": "android-lint-file",
+      "pattern": [
+        {
+          "regexp": "^(.+):\\s+(Warning|Error):\\s+(.+)\\s+\\[(.+)\\]$",
+          "file": 1,
+          "severity": 2,
+          "message": 3,
+          "code": 4,
+          "kind": "file"
+        }
+      ]
+    }
+  ]
+}

.github/android-lint-line-matcher.json

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+{
+    // Example:
+    // /path/to/file/build.gradle:55: Warning: A newer version of androidx.core:core-ktx than 1.2.0-beta01 is available: 1.2.0-rc01 [GradleDependency]
+    "problemMatcher": [
+      {
+        "owner": "android-lint-line",
+        "pattern": [
+          {
+            "regexp": "^(.+):(\\d+):\\s+(Warning|Error):\\s+(.+)\\s+\\[(.+)\\]$",
+            "file": 1,
+            "line": 2,
+            "severity": 3,
+            "message": 4,
+            "code": 5
+          }
+        ]
+      }
+    ]
+}

.github/gradle-matcher.json

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+{
+  // Example:
+  // warning   unused-exclude-by-conf             the exclude dependency is not in your dependency graph, so has no effect
+  // app/build.gradle:45
+  "problemMatcher": [
+    {
+      "owner": "gradle",
+      "pattern": [
+        {
+          "regexp": "^(error|quiet|warning|lifecycle|info|debug)\\s+(\\S+)\\s+(.+)$",
+          "severity": 1,
+          "code": 2,
+          "message": 3
+        },
+        {
+          "regexp": "^([^\\s]+):([\\d]+)$",
+          "file": 1,
+          "line": 2
+        }
+      ]
+    }
+  ]
+}

.github/kotlin-error-matcher.json

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+{
+  // Example:
+  // e: /path/to/file/KotlinFile.kt: (14, 5): Val cannot be reassigned
+  "problemMatcher": [
+    {
+      "owner": "kotlin-error",
+      "pattern": [
+        {
+          "regexp": "^e:\\s+(\\S+):\\s+\\((\\d+),\\s+(\\d+)\\):\\s+(.+)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "message": 4
+        }
+      ],
+      "severity": "error"
+    }
+  ]
+}

.github/kotlin-warning-matcher.json

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+{
+  // Example:
+  // w: /path/to/file/KotlinFile.kt: (14, 5): Parameter 'foo' is never used
+  "problemMatcher": [
+    {
+      "owner": "kotlin-warning",
+      "pattern": [
+        {
+          "regexp": "^w:\\s+(\\S+):\\s+\\((\\d+),\\s+(\\d+)\\):\\s+(.+)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "message": 4
+        }
+      ],
+      "severity": "warning"
+    }
+  ]
+}

README.md

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+# Android Problem Matchers
+
+Adds common problem matchers for Android builds to GitHub Action workflows.
+
+## Inputs
+
+No inputs are needed.
+
+## Outputs
+
+No outputs are generated apart from configured problem matchers.

action.yml

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+name: 'Android Problem Matchers'
+description: 'Adds common problem matchers for Android builds'
+runs:
+  using: 'node12'
+  main: 'index.js'

index.js

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+console.log("::add-matcher::.github/android-lint-file-matcher.json");
+console.log("::add-matcher::.github/android-lint-line-matcher.json");
+console.log("::add-matcher::.github/gradle-matcher.json");
+console.log("::add-matcher::.github/kotlin-error-matcher.json");
+console.log("::add-matcher::.github/kotlin-warning-matcher.json");

package-lock.json

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+{
+  "name": "android-problem-matchers-action",
+  "version": "1.0.0",
+  "lockfileVersion": 1
+}

package.json

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+{
+  "name": "android-problem-matchers-action",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}