create xmllint-problem-matcher

Author: korelstar

.github/workflows/lint.yml

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+name: Test
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@master
+    - name: Setup xmllint
+      run: sudo apt-get install --no-install-recommends -y libxml2-utils
+    - name: add problem matcher for xmllint
+      run: ./index.js
+    - name: lint XML file with syntax error
+      run: xmllint test/error.xml --schema test/info.xsd --noout || true
+    - name: lint XML file with schema error
+      run: xmllint test/info.xml --schema test/info.xsd --noout || true
+

README.md

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+# xmllint-problem-matcher
+
+This problem matcher lets you show errors from `xmllint` as annotation in GitHub Actions.
+
+## Usage
+
+Add the step to your workflow, before PHPUnit is called.
+
+```yaml
+    - uses: korelstar/xmllint-problem-matcher@v1
+```

action.yml

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+name: 'xmllint problem matcher'
+author: 'Kristof Hamann'
+description: 'Shows xmllint errors as annotation (with file and code line) in GitHub Actions'
+runs:
+  using: 'node12'
+  main: 'index.js'
+branding:
+  icon: 'check-square'
+  color: 'green'

index.js

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+#!/usr/bin/env node
+console.log(`::add-matcher::${__dirname}/xmllint-matcher.json`);

test/error.xml

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+<?xml version="1.0"?>
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+      xsi:noNamespaceSchemaLocation="info.xsd">
+    <idi>uniqueid</id>
+    <name attribut="test">App name</name>
+    </summary>This is for test</summary>
+    <description><![CDATA[
+Let's describe something	    
+]]></description>
+    <licence>agpl</licence>
+    <version>1.4</version>
+</info>

test/info.xml

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+<?xml version="1.0"?>
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+      xsi:noNamespaceSchemaLocation="info.xsd">
+    <id>testid</id>
+    <name attribut="test">App</name>
+    <summary>This is a summary</summary>
+    <description><![CDATA[
+Let's describe something.	    
+]]></description>
+    <licence>agpl</licence>
+    <version>1.4</version>
+</info>