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Native compilation via GitHub Actions instead of fetching binaries
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‎.github/workflows/build.yml‎

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name: Build
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on:
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push:
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branches: [master]
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tags: ['native-*']
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pull_request:
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branches: [master]
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workflow_dispatch:
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env:
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LMDB: lmdb/libraries/liblmdb
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jobs:
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linux:
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strategy:
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fail-fast: true
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matrix:
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# Container versions: debian:bookworm = glibc 2.36, alpine:3.21 = musl
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include:
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- { runner: ubuntu-latest, container: "debian:bookworm", artifact: x86_64-linux-gnu.so }
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- { runner: ubuntu-24.04-arm, container: "debian:bookworm", artifact: aarch64-linux-gnu.so }
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- { runner: ubuntu-latest, container: "alpine:3.21", artifact: x86_64-linux-musl.so }
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runs-on: ${{ matrix.runner }}
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container: ${{ matrix.container }}
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steps:
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- name: Install tools
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run: |
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if command -v apt-get >/dev/null; then
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apt-get update && apt-get install -y build-essential git
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else
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apk add --no-cache build-base git
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fi
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- uses: actions/checkout@v4
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with:
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submodules: true
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- name: Build and test
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run: make test
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working-directory: ${{ env.LMDB }}
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- name: Prepare artifact
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run: cp ${{ env.LMDB }}/liblmdb.so ${{ matrix.artifact }}
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- uses: actions/upload-artifact@v4
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with:
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name: ${{ matrix.artifact }}
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path: ${{ matrix.artifact }}
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retention-days: 1
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# ARM64 Alpine (alpine:3.21) requires QEMU because GitHub's JS actions don't run in Alpine on ARM64.
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# Tests are skipped because LMDB's MDB_FIXEDMAP doesn't work under QEMU emulation.
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linux-arm64-musl:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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with:
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submodules: true
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- uses: docker/setup-qemu-action@v3
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- name: Build
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run: |
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docker run --rm -v $PWD:/work -w /work --platform linux/arm64 alpine:3.21 sh -c '
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apk add --no-cache build-base
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make -C ${{ env.LMDB }}
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'
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- name: Prepare artifact
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run: cp ${{ env.LMDB }}/liblmdb.so aarch64-linux-musl.so
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- uses: actions/upload-artifact@v4
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with:
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name: aarch64-linux-musl.so
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path: aarch64-linux-musl.so
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retention-days: 1
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macos:
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strategy:
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fail-fast: true
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matrix:
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include:
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- { runner: macos-15-intel, artifact: x86_64-macos-none.so } # Intel available until Aug 2027
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- { runner: macos-latest, artifact: aarch64-macos-none.so }
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runs-on: ${{ matrix.runner }}
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steps:
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- uses: actions/checkout@v4
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with:
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submodules: true
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- name: Build and test
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run: make test
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working-directory: ${{ env.LMDB }}
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- name: Prepare artifact
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run: cp ${{ env.LMDB }}/liblmdb.so ${{ matrix.artifact }}
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- uses: actions/upload-artifact@v4
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with:
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name: ${{ matrix.artifact }}
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path: ${{ matrix.artifact }}
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retention-days: 1
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windows:
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runs-on: windows-latest
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steps:
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- uses: actions/checkout@v4
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with:
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submodules: true
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- uses: msys2/setup-msys2@v2
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with:
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msystem: MINGW64
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install: mingw-w64-x86_64-gcc make
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- name: Build and test
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shell: msys2 {0}
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run: make SOEXT=.dll test
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working-directory: ${{ env.LMDB }}
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- name: Prepare artifact
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run: cp ${{ env.LMDB }}/liblmdb.dll x86_64-windows-gnu.dll
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- uses: actions/upload-artifact@v4
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with:
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name: x86_64-windows-gnu.dll
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path: x86_64-windows-gnu.dll
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retention-days: 1
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package:
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needs: [linux, linux-arm64-musl, macos, windows]
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: actions/download-artifact@v4
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with:
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path: target/classes/org/lmdbjava/native
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merge-multiple: true
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- run: ls -la target/classes/org/lmdbjava/native
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- uses: actions/setup-java@v4
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with:
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distribution: zulu
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java-version: 21
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server-id: central
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server-username: MAVEN_CENTRAL_USERNAME
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server-password: MAVEN_CENTRAL_PASSWORD
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gpg-private-key: ${{ secrets.gpg_private_key }}
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gpg-passphrase: MAVEN_GPG_PASSPHRASE
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- run: mvn -B package
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- uses: actions/upload-artifact@v4
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with:
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name: native.jar
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path: target/*.jar
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- name: Deploy
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if: startsWith(github.ref, 'refs/tags/')
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run: mvn -B -Pcentral-deploy deploy -DskipTests
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env:
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MAVEN_GPG_PASSPHRASE: ${{ secrets.gpg_passphrase }}
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MAVEN_CENTRAL_USERNAME: ${{ secrets.central_username }}
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MAVEN_CENTRAL_PASSWORD: ${{ secrets.central_password }}

‎.github/workflows/maven.yml‎

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‎.gitmodules‎

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[submodule "lmdb"]
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path = lmdb
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url = https://git.openldap.org/openldap/openldap.git

‎README.md‎

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[![Maven Build and Deployment](https://github.com/lmdbjava/native/workflows/Maven%20Build%20and%20Deployment/badge.svg)](https://github.com/lmdbjava/native/actions)
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[![Build](https://github.com/lmdbjava/native/workflows/Build/badge.svg)](https://github.com/lmdbjava/native/actions)
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[![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)
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[![License](https://img.shields.io/badge/license-OpenLDAP-blue.svg?maxAge=2592000)](http://www.openldap.org/software/release/license.html)
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# LMDB Native Libraries
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Provides pre-compiled LMDB native libraries for Linux, macOS and Windows. These libraries are fetched from distribution package managers (Alpine Linux, Fedora, Homebrew, MSYS2) and packaged into a single JAR for easy dependency resolution.
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Compiled LMDB native libraries for Linux (glibc/musl), macOS and Windows on x86_64 and aarch64.
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**If you are using LMDB from Java, use the [LmdbJava](https://github.com/lmdbjava/lmdbjava) project instead.** This artifact is a dependency of LmdbJava.
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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).
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### Updating LMDB
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### Version Management
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Update all dependency and plugin versions:
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```bash
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mvn versions:update-properties
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cd lmdb
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git fetch --tags
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git checkout LMDB_0.9.XX
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cd ..
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git add lmdb
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```
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Update the LMDB version by editing `LMDB_VERSION` in `fetch-native-libs.sh`.
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### Releasing
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GitHub Actions will perform an official release whenever a developer executes `mvn release:clean release:prepare`.
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### License
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LMDB (and this repository for simplicity) is licensed under [The OpenLDAP Public License](http://www.openldap.org/software/release/license.html).

‎fetch-native-libs.sh‎

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‎lmdb‎

Submodule lmdb added at 3a29a24

‎pom.xml‎

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<properties>
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<buildnumber-maven-plugin.version>3.2.1</buildnumber-maven-plugin.version>
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<central-publishing-maven-plugin.version>0.9.0</central-publishing-maven-plugin.version>
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<exec-maven-plugin.version>3.6.2</exec-maven-plugin.version>
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<maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
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<maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
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<maven-release-plugin.version>3.1.1</maven-release-plugin.version>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>exec-maven-plugin</artifactId>
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<version>${exec-maven-plugin.version}</version>
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<executions>
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<execution>
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<id>fetch-native-libraries</id>
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<goals>
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<goal>exec</goal>
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</goals>
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<phase>generate-resources</phase>
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<configuration>
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<executable>${project.basedir}/fetch-native-libs.sh</executable>
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<workingDirectory>${project.basedir}</workingDirectory>
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<environmentVariables>
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<DEST>target/classes/org/lmdbjava/native</DEST>
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</environmentVariables>
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</configuration>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>versions-maven-plugin</artifactId>

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