feat: provide support for System properties and Environment variables

Signed-off-by: Fred Bricon <fbricon@gmail.com>

src/main/java/com/redhat/devtools/intellij/lsp4mp4ij/psi/core/SysEnvPropertiesProvider.java

@@ -0,0 +1,84 @@
+/*******************************************************************************
+ * Copyright (c) 2024 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-v20.html
+ *
+ * Contributors:
+ *     Red Hat Inc. - initial API and implementation
+ *******************************************************************************/
+package com.redhat.devtools.intellij.lsp4mp4ij.psi.core;
+
+import com.intellij.psi.PsiModifierListOwner;
+import com.intellij.util.Query;
+import org.eclipse.lsp4mp.commons.metadata.ConfigurationMetadata;
+import org.eclipse.lsp4mp.commons.metadata.ItemMetadata;
+
+import java.util.List;
+
+import static org.eclipse.lsp4mp.commons.metadata.ItemMetadata.CONFIG_PHASE_RUN_TIME;
+
+/**
+ * Properties provider for Environment variables and System properties.
+ */
+public class SysEnvPropertiesProvider extends AbstractPropertiesProvider {
+    @Override
+    protected String[] getPatterns() {
+        return null;
+    }
+
+    @Override
+    protected Query<PsiModifierListOwner> createSearchPattern(SearchContext context, String pattern) {
+        return null;
+    }
+
+    @Override
+    public void collectProperties(PsiModifierListOwner match, SearchContext context) {
+        List<String[]> sysProps = System.getProperties().entrySet().stream().map(e -> {
+            var tuple = new String[2];
+            tuple[0] = e.getKey().toString();
+            tuple[1] = e.getValue().toString();
+            return tuple;
+        }).toList();
+        var sysPropsMetadata = getMetadata("System property", sysProps);
+        context.getCollector().merge(sysPropsMetadata, IPropertiesCollector.MergingStrategy.IGNORE_IF_EXISTS);
+
+
+        List<String[]> envVars = System.getenv().entrySet().stream().map(e -> {
+            var tuple = new String[2];
+            String key = e.getKey();
+            tuple[0] = key;
+            // Poor-man obfuscation of env var keys (*_KEY) and secrets (*_SECRET)
+            // Maybe later add configuration for suffixes and/or actual keys to obfuscate
+            tuple[1] = obfuscate(key, e.getValue());
+            return tuple;
+        }).toList();
+
+        var envVarsMetadata = getMetadata("Environment variable", envVars);
+        context.getCollector().merge(envVarsMetadata, IPropertiesCollector.MergingStrategy.IGNORE_IF_EXISTS);
+
+    }
+
+    private String obfuscate(String key, String value) {
+        var upKey = key.toUpperCase().replace(".", "_");
+        return upKey.endsWith("_KEY") || upKey.endsWith("_SECRET") ? "*********" : value;
+    }
+
+    private ConfigurationMetadata getMetadata(String source, List<String[]> properties) {
+        ConfigurationMetadata metadata = new ConfigurationMetadata();
+        List<ItemMetadata> itemProperties = properties.stream().map(kv -> {
+            var item = new ItemMetadata();
+            item.setExtensionName(source);
+            item.setPhase(CONFIG_PHASE_RUN_TIME);
+            item.setName(kv[0]);
+            item.setDefaultValue(kv[1]);
+            item.setType("java.lang.String");
+            item.setDescription(source);
+            return item;
+        }).toList();
+
+        metadata.setProperties(itemProperties);
+        return metadata;
+    }
+
+}

src/main/resources/META-INF/plugin.xml

@@ -589,6 +589,9 @@
         <propertiesProvider
                 implementation="com.redhat.microprofile.psi.internal.quarkus.cache.properties.QuarkusCacheResultProvider"/>
 
+        <propertiesProvider
+                implementation="com.redhat.devtools.intellij.lsp4mp4ij.psi.core.SysEnvPropertiesProvider"/>
+
         <!-- Quarkus Scheduled annotation -->
         <javaASTValidator.validator
                 implementation="com.redhat.microprofile.psi.internal.quarkus.scheduler.java.QuarkusSchedulerASTVisitor"/>