Added support for loading alpine shared library

nterry · nterry · commit 4502affbf9c4 · 2020-02-04T23:59:17.000-07:00
Added Azure pipelines CI file
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
@@ -0,0 +1,29 @@
+trigger:
+  branches:
+    include:
+    - master
+    - refs/tags/*
+
+jobs:
+- job:
+  displayName: 'Snapshot build'
+  condition: eq(variables['build.sourceBranch'], 'refs/heads/master')
+  pool:
+    vmImage: 'macOS-10.15'
+
+  steps:
+  - checkout: self
+
+  - task: Maven@3
+    inputs:
+      mavenPomFile: 'pom.xml'
+      goals: 'clean install'
+      options: '-Drevision=$(Build.BuildNumber)'
+      publishJUnitResults: false
+      testResultsFiles: '**/surefire-reports/TEST-*.xml'
+      javaHomeOption: 'JDKVersion'
+      jdkVersionOption: '1.11'
+      mavenVersionOption: 'Default'
+      mavenAuthenticateFeed: false
+      effectivePomSkip: false
+      sonarQubeRunAnalysis: false
diff --git a/pom.xml b/pom.xml
@@ -6,9 +6,9 @@
     <artifactId>acegi-standard-project</artifactId>
     <version>0.2.3</version>
   </parent>
-  <groupId>org.lmdbjava</groupId>
+  <groupId>org.lmdbjava.alt</groupId>
   <artifactId>lmdbjava</artifactId>
-  <version>0.7.1-SNAPSHOT</version>
+  <version>0.7.1-${revision}-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>LmdbJava</name>
   <description>Low latency Java API for the ultra-fast, embedded Symas Lightning Database (LMDB)</description>
diff --git a/src/main/java/org/lmdbjava/Library.java b/src/main/java/org/lmdbjava/Library.java
@@ -23,6 +23,7 @@
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.io.File;
 import static java.io.File.createTempFile;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -33,6 +34,7 @@
 import static java.util.Locale.ENGLISH;
 import static java.util.Objects.nonNull;
 import static java.util.Objects.requireNonNull;
+import java.util.Properties;
 import static jnr.ffi.LibraryLoader.create;
 import jnr.ffi.Pointer;
 import static jnr.ffi.Runtime.getRuntime;
@@ -97,7 +99,8 @@ final class Library {
     if (SHOULD_USE_LIB) {
       libToLoad = getProperty(LMDB_NATIVE_LIB_PROP);
     } else if (SHOULD_EXTRACT && arch64 && linux) {
-      libToLoad = extract("org/lmdbjava/lmdbjava-native-linux-x86_64.so");
+      final String flavor = refineLinux();
+      libToLoad = extract(String.format("org/lmdbjava/lmdbjava-native-%s-x86_64.so", flavor));
     } else if (SHOULD_EXTRACT && arch64 && osx) {
       libToLoad = extract("org/lmdbjava/lmdbjava-native-osx-x86_64.dylib");
     } else if (SHOULD_EXTRACT && arch64 && windows) {
@@ -137,6 +140,28 @@ private static String extract(final String name) {
     }
   }
 
+  @SuppressWarnings({"checkstyle:returncount", "PMD.AvoidFileStream"})
+  private static String refineLinux() {
+    // /etc/os-release is a very cross-platform way to determine the linux distribution
+    // and just happens to be specified in properties format
+    try (InputStream inputStream = new FileInputStream("/etc/os-release")) {
+      final Properties properties = new Properties();
+      properties.load(inputStream);
+
+      final String flavor = String.valueOf(properties.get("ID")).trim();
+
+      // We only care if it's Alpine for now as it uses MUSL instead of GLIBC
+      if ("alpine".equals(flavor)) {
+        return "linux-alpine";
+      } else {
+        return "linux";
+      }
+    } catch (final IOException e) {
+      // Default to plain 'linux' if anything fails
+      return "linux";
+    }
+  }
+
   /**
    * Structure to wrap a native <code>MDB_envinfo</code>. Not for external use.
    */
