snapcraft.yaml

# snapcraft.yaml - builds a Snap package of OpenJDK
# Copyright (C) 2020-2025 John Neffenger
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

name: openjdk
title: OpenJDK
summary: Current JDK release and early-access builds
description: |
  OpenJDK is the official reference implementation of the Java
  Platform, Standard Edition, a cross-platform computing environment
  that lets you develop and deploy Java applications on desktops,
  servers, and embedded systems.

  This package provides everything you need to develop a Java
  application on Linux, including all of the latest development tools,
  class libraries, API documentation, and source code of the Java
  Development Kit (JDK).

  Installing this package does not replace the JDK provided by your
  Linux distribution but instead allows you to use both of them side by
  side. To get started, see the README file for this package on GitHub:

  https://github.com/jgneff/openjdk

  Java and OpenJDK are trademarks or registered trademarks of Oracle
  and/or its affiliates.

adopt-info: jdk
license: GPL-2.0-with-classpath-exception

base: core18
grade: stable
confinement: strict

architectures:
- build-on: amd64
- build-on: arm64
- build-on: armhf
- build-on: i386
- build-on: ppc64el
- build-on: s390x

slots:
  jdk-23-1804:
    interface: content
    read: [$SNAP/jdk]
  jdk-24-1804:
    interface: content
    read: [$SNAP/jdk]

plugs:
  home: null
  jfx-24-1804:
    interface: content
    target: $SNAP/jfx

apps:
  openjdk:
    command: bin/openjdk.sh
    environment:
      LC_ALL: C.UTF-8
  java:
    command: jdk/bin/java
    plugs:
    # Adds the interfaces of the GNOME Snapcraft Extensions plus 'network'
    - desktop
    - desktop-legacy
    - gsettings
    - network
    - opengl
    - wayland
    - x11
    environment:
      LC_ALL: C.UTF-8
      LD_LIBRARY_PATH: $SNAP/jfx/lib/$SNAPCRAFT_ARCH_TRIPLET
      GTK_PATH: $SNAP/jfx/lib/$SNAPCRAFT_ARCH_TRIPLET/gtk-3.0
  javac:
    command: jdk/bin/javac
    environment:
      LC_ALL: C.UTF-8
  javadoc:
    command: jdk/bin/javadoc
    environment:
      LC_ALL: C.UTF-8
  jar:
    command: jdk/bin/jar
    environment:
      LC_ALL: C.UTF-8
  jarsigner:
    command: jdk/bin/jarsigner
    environment:
      LC_ALL: C.UTF-8
  jlink:
    command: jdk/bin/jlink
    environment:
      LC_ALL: C.UTF-8
  jpackage:
    command: jdk/bin/jpackage
    environment:
      LC_ALL: C.UTF-8
  jwebserver:
    command: jdk/bin/jwebserver
    plugs:
    - network-bind
    environment:
      LC_ALL: C.UTF-8

parts:
  bin:
    plugin: dump
    source: .
    source-type: local
    stage: [bin]

  jdk:
    plugin: autotools
    source: https://github.com/openjdk/jdk24u.git
    source-type: git
    source-tag: jdk-$SNAPCRAFT_PROJECT_VERSION
    source-depth: 1
    build-snaps:
    - openjdk/latest/stable
    build-packages:
    - curl
    - libasound2-dev
    - libcups2-dev
    - libfontconfig1-dev
    - libfreetype6-dev
    - libx11-dev
    - libxext-dev
    - libxrandr-dev
    - libxrender-dev
    - libxt-dev
    - libxtst-dev
    - unzip
    - zip
    override-pull: |
      release=24
      giturl=https://github.com/openjdk/jdk24u.git
      tagurl=https://github.com/openjdk/jdk24u/tags.atom

      # Gets the version from the latest release tag on GitHub
      #   $1 = feature release number (formerly "major" version)
      #   $2 = URL of Atom web feed providing recent tags
      getversion() {
          local feature=$1
          local webfeed=$2
          curl -s "$webfeed" | grep "<title>jdk-${feature}[.0-9]*+[^0]" \
              | sed -E -e '1!d' -e 's| *<title>jdk-(.*)</title>|\1|'
      }

      # Sets the version and saves its environment variable
      #   $1 = the version string
      setversion() {
          snapcraftctl set-version "$1"
          printf "export SNAPCRAFT_PROJECT_VERSION=%s\n" "$1" \
              > /tmp/snapcraft-project-version
      }

      # See https://forum.snapcraft.io/t/17597
      if [ -z "$SNAPCRAFT_PROJECT_VERSION" ]; then
          version=$(getversion $release $tagurl)
          setversion "$version"
          git clone --branch "jdk-$version" --depth 1 \
              $giturl "$SNAPCRAFT_PART_SRC"
      else
          snapcraftctl pull
      fi
    build-environment:
    - JAVA_HOME: /snap/openjdk/current/jdk
    override-build: |
      # Loads the version environment variable if not defined
      if [ -z "$SNAPCRAFT_PROJECT_VERSION" ]; then
          . /tmp/snapcraft-project-version
      fi

      # Sets the environment variable for reproducible builds
      SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct)
      export SOURCE_DATE_EPOCH

      # Builds the JDK
      #   '--enable-deprecated-ports=yes' for i386
      #   '--enable-warnings-as-errors=no' for armhf
      bash configure \
          --enable-deprecated-ports=yes \
          --enable-warnings-as-errors=no \
          --enable-javac-server=no \
          --with-vendor-name="Snap Build" \
          --with-vendor-url="https://snapcraft.io/openjdk" \
          --with-vendor-bug-url="https://github.com/jgneff/openjdk/issues" \
          --with-version-pre=no \
          --with-version-opt=snap \
          --with-version-build="${SNAPCRAFT_PROJECT_VERSION#*+}" \
          --with-extra-cflags="$CFLAGS" \
          --with-extra-cxxflags="$CXXFLAGS" \
          --with-extra-ldflags="$LDFLAGS" \
          --with-native-debug-symbols=none
      make images docs

      # Installs the build output
      cd build/linux-*-server-release/images || exit
      mv jdk docs "$SNAPCRAFT_PART_INSTALL"
    organize:
      docs: jdk/docs
    stage-packages:
    # Adds all DejaVu fonts and the 'jlink' and 'jpackage' dependencies
    - binutils
    - dpkg
    - fakeroot
    - fonts-dejavu-extra
    # Adds library packages suggested by Snapcraft plus 'libfontconfig1'
    - libasound2
    - libfontconfig1
    - libfreetype6
    - libpng16-16
    - libx11-6
    - libxau6
    - libxcb1
    - libxdmcp6
    - libxext6
    - libxi6
    - libxrender1
    - libxtst6

  del:
    after: [jdk]
    plugin: nil
    # Deletes files and links already available in the base snap
    override-prime: |
      cd "$SNAPCRAFT_PRIME" || exit
      base=/snap/core18/current
      for d in etc lib usr/lib usr/share; do
          find "$d" -type f -exec test -f "$base/{}" \; -delete
          find "$d" -type l -exec test -L "$base/{}" \; -delete
      done
      find ./* -type d -empty -exec test -d "$base/{}" \; -delete

layout:
  # For Java Swing apps

  # Fontconfig error: Cannot load config file from /etc/fonts/fonts.conf
  /etc/fonts:
    bind: $SNAP/etc/fonts
  # Exception in thread "AWT-EventQueue-0" java.lang.InternalError:
  # java.lang.reflect.InvocationTargetException
  # Caused by: java.lang.NullPointerException: Cannot load from short array
  # because "sun.awt.FontConfiguration.head" is null
  /usr/share/fonts/truetype/dejavu:
    bind: $SNAP/usr/share/fonts/truetype/dejavu

  # For the JDK 'jpackage' tool

  # dpkg: error: error opening configuration directory '/etc/dpkg/dpkg.cfg.d':
  # Permission denied
  /etc/dpkg:
    bind: $SNAP/etc/dpkg
  # Can not find fakeroot. Reason: Cannot run program "fakeroot": error=2,
  # No such file or directory
  /usr/bin/fakeroot:
    symlink: $SNAP/usr/bin/fakeroot-sysv
  # fakeroot: preload library `libfakeroot-sysv.so' not found, aborting.
  /usr/lib/$SNAPCRAFT_ARCH_TRIPLET/libfakeroot/libfakeroot-sysv.so:
    symlink: $SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/libfakeroot/libfakeroot-sysv.so
  # /usr/bin/fakeroot: 1: eval: /usr/bin/faked-sysv: not found
  /usr/bin/faked-sysv:
    symlink: $SNAP/usr/bin/faked-sysv

  # For JavaFX apps

  # libGL error: MESA-LOADER: failed to open i965 (search paths
  # /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
  # libGL error: failed to load driver: i965
  /usr/lib/$SNAPCRAFT_ARCH_TRIPLET/dri:
    symlink: $SNAP/jfx/lib/$SNAPCRAFT_ARCH_TRIPLET/dri
  # GdkPixbuf-WARNING **: 16:04:55.707: Cannot open pixbuf loader module
  # file '/usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache':
  # No such file or directory
  /usr/lib/$SNAPCRAFT_ARCH_TRIPLET/gdk-pixbuf-2.0:
    symlink: $SNAP/jfx/lib/$SNAPCRAFT_ARCH_TRIPLET/gdk-pixbuf-2.0

  # For Raspberry Pi OS

  # ERROR: ld.so: object '/usr/lib/arm-linux-gnueabihf/libarmmem-${PLATFORM}.so'
  # from /etc/ld.so.preload cannot be preloaded (cannot open shared object
  # file): ignored.
  /etc/ld.so.preload:
    bind-file: $SNAP/etc/ld.so.preload