Restore native artifact packaging

Zig cross-compilation produced LMDB libraries 31% slower than
distribution packages. This restores the native artifact, now fetching
pre-compiled libraries from Arch Linux, Homebrew and MSYS2 instead of
compiling them ourselves.

This approach reduces complexity and is practical given infrequent
LMDB releases.

Author: bp-alex

.github/workflows/maven.yml

@@ -8,60 +8,54 @@ on:
 
 jobs:
   build:
-    name: ${{ matrix.os }} Build
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+    name: Build and Verify
+    runs-on: ubuntu-latest
 
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
-      with:
-        submodules: true
+      uses: actions/checkout@v5
+
+    - name: Install dependencies
+      run: sudo apt-get update && sudo apt-get install -y zstd
 
     - name: Set up Java and Maven
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v5
       with:
         distribution: zulu
-        java-version: 11
+        java-version: 25
         cache: maven
 
     - name: Build with Maven
       run: mvn -B verify
 
   deploy:
-    needs: build
-    name: ${{ matrix.os }} Deploy to OSSRH
-    runs-on: ${{ matrix.os }}
+    name: Deploy to Central Portal
+    needs: [build]
     if: github.event_name == 'push'
-
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ubuntu-latest
 
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
-      with:
-        submodules: true
+      uses: actions/checkout@v5
+
+    - name: Install dependencies
+      run: sudo apt-get update && sudo apt-get install -y zstd
 
     - name: Set up Java and Maven
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v5
       with:
         distribution: zulu
-        java-version: 11
+        java-version: 25
         cache: maven
-        server-id: ossrh
-        server-username: MAVEN_USERNAME
-        server-password: MAVEN_CENTRAL_TOKEN
+        server-id: central
+        server-username: MAVEN_CENTRAL_USERNAME
+        server-password: MAVEN_CENTRAL_PASSWORD
         gpg-private-key: ${{ secrets.gpg_private_key }}
         gpg-passphrase: MAVEN_GPG_PASSPHRASE
 
     - name: Publish Maven package
-      run: mvn -Possrh-deploy -B deploy
+      run: mvn -B -Pcentral-deploy deploy -DskipTests
       env:
         MAVEN_GPG_PASSPHRASE: ${{ secrets.gpg_passphrase }}
-        MAVEN_USERNAME: ${{ secrets.nexus_username }}
-        MAVEN_CENTRAL_TOKEN: ${{ secrets.nexus_password }}
+        MAVEN_CENTRAL_USERNAME: ${{ secrets.central_username }}
+        MAVEN_CENTRAL_PASSWORD: ${{ secrets.central_password }}

.gitmodules

@@ -1,59 +1,28 @@
-# THIS PROJECT IS ARCHIVED
-
-**Cross compilation is now performed in the
-[LmdbJava](https://github.com/lmdbjava/lmdbjava) project.**
-
 [![Maven Build and Deployment](https://github.com/lmdbjava/native/workflows/Maven%20Build%20and%20Deployment/badge.svg)](https://github.com/lmdbjava/native/actions)
-[![Maven Central](https://img.shields.io/maven-central/v/org.lmdbjava/lmdbjava-native-parent.svg?maxAge=3600)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.lmdbjava%22%20AND%20a%3A%22lmdbjava-native-parent%22)
+[![Maven Central](https://img.shields.io/maven-central/v/org.lmdbjava/native.svg?maxAge=3600)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.lmdbjava%22%20AND%20a%3A%22native%22)
 [![License](https://img.shields.io/badge/license-OpenLDAP-blue.svg?maxAge=2592000)](http://www.openldap.org/software/release/license.html)
 
 # LMDB Native Libraries
 
-This repository creates standard builds of the [LMDB](http://symas.com/mdb/)
-native library. It packages the built libraries into operating system-specific
-JARs (with POMs). This allows [LmdbJava](https://github.com/lmdbjava/lmdbjava)
-(or other interested Java projects) to depend on these JARs using the normal
-Maven dependency resolution process.
-
-**If you are simply wishing to use LMDB from Java, please use the
-[LmdbJava](https://github.com/lmdbjava/lmdbjava) project.**
-
-This project is intended to be executed by GitHub Actions, as Linux, Windows and
-macOS operating systems are all required. Linux is used for compiling the Linux
-modules, whereas Windows and macOS compile their modules.
-
-### Versioning
+Provides pre-compiled LMDB native libraries for Linux, macOS and Windows. These libraries are fetched from distribution package managers (Arch Linux, Homebrew, MSYS2) and packaged into a single JAR for easy dependency resolution.
 
-This project uses the `major.minor.patch-qualifier` version numbering typical
-of Maven projects. The major, minor and patch directly reflect the upstream
-LMDB library version, as expressed by `lmdb.h` `MDB_VERSION_*` definitions.
-The qualifier resets to `1` on a new major, minor or patch release.
+**If you are using LMDB from Java, use the [LmdbJava](https://github.com/lmdbjava/lmdbjava) project instead.** This artifact is a dependency of LmdbJava.
 
-### Repository
+Available from [Maven Central](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.lmdbjava%22%20AND%20a%3A%22native%22) and [Central Portal Snapshots](https://central.sonatype.com/repository/maven-snapshots/org/lmdbjava/native).
 
-[LmdbJava](https://github.com/lmdbjava/lmdbjava) shades inside its JAR all of
-the system libraries produced by this project. As such, end users typically have
-no need to refer to any artifacts produced by this project.
+### Version Management
 
-### Snapshots
+Update all dependency and plugin versions:
+```bash
+mvn versions:update-properties
+```
 
-GitHub Actions automatically publishes snapshot releases to the
-[OSS Sonatype Snapshots Repository](https://oss.sonatype.org/content/repositories/snapshots/org/lmdbjava/lmdbjava-native-parent/).
-
-### Support
-
-Please [open a GitHub issue](https://github.com/lmdbjava/native/issues) if you
-have any questions.
-
-### Contributing
-
-Contributions are welcome! Please see the LmdbJava project's
-[Contributing Guidelines](https://github.com/lmdbjava/lmdbjava/blob/master/CONTRIBUTING.md).
+Update the LMDB version by editing `LMDB_VERSION` in `fetch-native-libs.sh`.
 
 ### Releasing
 
-Please see the [Acegi Standard Project Release Instructions](https://github.com/acegi/acegi-standard-project#performing-a-release).
+GitHub Actions will perform an official release whenever a developer executes `mvn release:clean release:prepare`.
 
 ### License
-LMDB (and this repository for simplicity) is licensed under
-[The OpenLDAP Public License](http://www.openldap.org/software/release/license.html).
+
+LMDB (and this repository for simplicity) is licensed under [The OpenLDAP Public License](http://www.openldap.org/software/release/license.html).

README.md

@@ -0,0 +1,64 @@
+#!/bin/bash
+#
+# Copyright © 2016-2025 The LmdbJava Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set -euo pipefail
+
+LMDB_VERSION="0.9.33"
+DEST="${DEST:-src/main/resources/org/lmdbjava/native}"
+TMP=$(mktemp -d)
+trap "rm -rf $TMP" EXIT
+
+mkdir -p "$DEST"
+
+# Arch Linux x86_64
+if [ ! -f "$DEST/x86_64-linux-gnu.so" ]; then
+  curl -sL "https://archive.archlinux.org/packages/l/lmdb/lmdb-${LMDB_VERSION}-1-x86_64.pkg.tar.zst" -o "$TMP/x64.tar.zst"
+  zstd -d "$TMP/x64.tar.zst" -o "$TMP/x64.tar"
+  tar xf "$TMP/x64.tar" -C "$TMP" usr/lib/liblmdb.so --strip-components=2
+  mv -f "$TMP/liblmdb.so" "$DEST/x86_64-linux-gnu.so"
+fi
+
+# Arch Linux ARM aarch64
+if [ ! -f "$DEST/aarch64-linux-gnu.so" ]; then
+  curl -sL "http://mirror.archlinuxarm.org/aarch64/extra/lmdb-${LMDB_VERSION}-1-aarch64.pkg.tar.xz" -o "$TMP/arm64.tar.xz"
+  tar xf "$TMP/arm64.tar.xz" -C "$TMP" usr/lib/liblmdb.so --strip-components=2
+  mv -f "$TMP/liblmdb.so" "$DEST/aarch64-linux-gnu.so"
+fi
+
+# Homebrew macOS x86_64
+if [ ! -f "$DEST/x86_64-macos-none.so" ]; then
+  curl -sL "https://mirrors.sustech.edu.cn/homebrew-bottles/bottles/lmdb-${LMDB_VERSION}.sonoma.bottle.tar.gz" -o "$TMP/brew-x64.tar.gz"
+  tar xzf "$TMP/brew-x64.tar.gz" -C "$TMP" lmdb/${LMDB_VERSION}/lib/liblmdb.dylib --strip-components=3
+  mv -f "$TMP/liblmdb.dylib" "$DEST/x86_64-macos-none.so"
+fi
+
+# Homebrew macOS arm64
+if [ ! -f "$DEST/aarch64-macos-none.so" ]; then
+  curl -sL "https://mirrors.sustech.edu.cn/homebrew-bottles/bottles/lmdb-${LMDB_VERSION}.arm64_sonoma.bottle.tar.gz" -o "$TMP/brew-arm.tar.gz"
+  tar xzf "$TMP/brew-arm.tar.gz" -C "$TMP" lmdb/${LMDB_VERSION}/lib/liblmdb.dylib --strip-components=3
+  mv -f "$TMP/liblmdb.dylib" "$DEST/aarch64-macos-none.so"
+fi
+
+# MSYS2 Windows x86_64
+if [ ! -f "$DEST/x86_64-windows-gnu.dll" ]; then
+  curl -sL "https://repo.msys2.org/mingw/mingw64/mingw-w64-x86_64-lmdb-${LMDB_VERSION}-1-any.pkg.tar.zst" -o "$TMP/win.tar.zst"
+  zstd -d "$TMP/win.tar.zst" -o "$TMP/win.tar"
+  tar xf "$TMP/win.tar" -C "$TMP" mingw64/bin/liblmdb.dll --strip-components=2
+  mv -f "$TMP/liblmdb.dll" "$DEST/x86_64-windows-gnu.dll"
+fi
+
+ls -lh "$DEST"