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Add `just appimage` to bundle the demo as a self-contained AppImage

The AppImage carries a jlink'd java.base runtime, so the demo binary is
linked with an $ORIGIN-relative rpath instead of the build machine's JDK
path. appimagetool is fetched to build/tools on first use.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
nandithebull committed 2026-09-20T14:49:52-07:00 Browse files
12f125f parent: 066bac4
modified justfile +64 -0
@@ -47,3 +47,67 @@ jdk:
4747 trap 'rm -rf "$d"' EXIT
4848 printf 'import libjava/config\necho javaHome\n' > "$d/jdk.nim"
4949 nim c -r --path:src --hints:off -d:libjavaNoLink --nimcache:"$d/cache" -o:"$d/jdk" "$d/jdk.nim"
50+
51+# The AppImage carries its own jlink'd Java runtime, so the demo binary is
52+# linked against $ORIGIN/../lib/jvm rather than the build machine's JDK.
53+# appimagetool is downloaded to build/tools on first use; set APPIMAGETOOL to
54+# point at your own copy instead.
55+#
56+# Bundle the example into a self-contained AppImage in out/
57+appimage: java
58+ #!/usr/bin/env bash
59+ set -euo pipefail
60+ home="${JAVA_HOME:-$(dirname "$(dirname "$(readlink -f "$(command -v javac)")")")}"
61+ arch=$(uname -m)
62+
63+ tool="${APPIMAGETOOL:-build/tools/appimagetool}"
64+ if [ ! -x "$tool" ]; then
65+ mkdir -p "$(dirname "$tool")"
66+ curl -fsSL -o "$tool" \
67+ "https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-$arch.AppImage"
68+ chmod +x "$tool"
69+ fi
70+
71+ rm -rf build/AppDir
72+ mkdir -p build/AppDir/usr/bin build/AppDir/build
73+
74+ # A minimal runtime: the demo only touches java.base.
75+ "$home/bin/jlink" --add-modules java.base \
76+ --strip-debug --no-header-files --no-man-pages --compress=2 \
77+ --output build/AppDir/usr/lib/jvm
78+
79+ # Headers from the build JDK; libjvm resolved next to the binary at runtime.
80+ # (nim links through a shell, so $ORIGIN needs escaping twice over.)
81+ nim c -d:release --path:src -d:libjavaNoLink --nimcache:build/nimcache \
82+ --passL:"-L$home/lib/server -ljvm -Wl,-rpath,\\\$ORIGIN/../lib/jvm/lib/server" \
83+ -o:build/AppDir/usr/bin/demo examples/demo.nim
84+
85+ # demo.nim looks for its classes at the relative path build/classes,
86+ # so AppRun runs from the AppDir root.
87+ cp -r build/classes build/AppDir/build/classes
88+
89+ printf '%s\n' \
90+ '#!/usr/bin/env bash' \
91+ 'cd "$(dirname "$(readlink -f "$0")")"' \
92+ 'exec ./usr/bin/demo "$@"' > build/AppDir/AppRun
93+ chmod +x build/AppDir/AppRun
94+
95+ printf '%s\n' \
96+ '[Desktop Entry]' \
97+ 'Type=Application' \
98+ 'Name=libjava demo' \
99+ 'Exec=AppRun' \
100+ 'Icon=libjava-demo' \
101+ 'Categories=Development;' \
102+ 'Terminal=true' > build/AppDir/libjava-demo.desktop
103+
104+ printf '%s\n' \
105+ '<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256">' \
106+ ' <rect width="256" height="256" rx="32" fill="#1b1f23"/>' \
107+ ' <text x="128" y="164" font-family="sans-serif" font-size="104"' \
108+ ' font-weight="bold" fill="#ffe873" text-anchor="middle">Jn</text>' \
109+ '</svg>' > build/AppDir/libjava-demo.svg
110+ ln -sf libjava-demo.svg build/AppDir/.DirIcon
111+
112+ mkdir -p out
113+ ARCH="$arch" "$tool" build/AppDir "out/libjava-demo-$arch.AppImage"
@@ -47,3 +47,67 @@ jdk:
47 trap 'rm -rf "$d"' EXIT47 trap 'rm -rf "$d"' EXIT
48 printf 'import libjava/config\necho javaHome\n' > "$d/jdk.nim"48 printf 'import libjava/config\necho javaHome\n' > "$d/jdk.nim"
49 nim c -r --path:src --hints:off -d:libjavaNoLink --nimcache:"$d/cache" -o:"$d/jdk" "$d/jdk.nim"49 nim c -r --path:src --hints:off -d:libjavaNoLink --nimcache:"$d/cache" -o:"$d/jdk" "$d/jdk.nim"
50+
51+# The AppImage carries its own jlink'd Java runtime, so the demo binary is
52+# linked against $ORIGIN/../lib/jvm rather than the build machine's JDK.
53+# appimagetool is downloaded to build/tools on first use; set APPIMAGETOOL to
54+# point at your own copy instead.
55+#
56+# Bundle the example into a self-contained AppImage in out/
57+appimage: java
58+ #!/usr/bin/env bash
59+ set -euo pipefail
60+ home="${JAVA_HOME:-$(dirname "$(dirname "$(readlink -f "$(command -v javac)")")")}"
61+ arch=$(uname -m)
62+
63+ tool="${APPIMAGETOOL:-build/tools/appimagetool}"
64+ if [ ! -x "$tool" ]; then
65+ mkdir -p "$(dirname "$tool")"
66+ curl -fsSL -o "$tool" \
67+ "https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-$arch.AppImage"
68+ chmod +x "$tool"
69+ fi
70+
71+ rm -rf build/AppDir
72+ mkdir -p build/AppDir/usr/bin build/AppDir/build
73+
74+ # A minimal runtime: the demo only touches java.base.
75+ "$home/bin/jlink" --add-modules java.base \
76+ --strip-debug --no-header-files --no-man-pages --compress=2 \
77+ --output build/AppDir/usr/lib/jvm
78+
79+ # Headers from the build JDK; libjvm resolved next to the binary at runtime.
80+ # (nim links through a shell, so $ORIGIN needs escaping twice over.)
81+ nim c -d:release --path:src -d:libjavaNoLink --nimcache:build/nimcache \
82+ --passL:"-L$home/lib/server -ljvm -Wl,-rpath,\\\$ORIGIN/../lib/jvm/lib/server" \
83+ -o:build/AppDir/usr/bin/demo examples/demo.nim
84+
85+ # demo.nim looks for its classes at the relative path build/classes,
86+ # so AppRun runs from the AppDir root.
87+ cp -r build/classes build/AppDir/build/classes
88+
89+ printf '%s\n' \
90+ '#!/usr/bin/env bash' \
91+ 'cd "$(dirname "$(readlink -f "$0")")"' \
92+ 'exec ./usr/bin/demo "$@"' > build/AppDir/AppRun
93+ chmod +x build/AppDir/AppRun
94+
95+ printf '%s\n' \
96+ '[Desktop Entry]' \
97+ 'Type=Application' \
98+ 'Name=libjava demo' \
99+ 'Exec=AppRun' \
100+ 'Icon=libjava-demo' \
101+ 'Categories=Development;' \
102+ 'Terminal=true' > build/AppDir/libjava-demo.desktop
103+
104+ printf '%s\n' \
105+ '<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256">' \
106+ ' <rect width="256" height="256" rx="32" fill="#1b1f23"/>' \
107+ ' <text x="128" y="164" font-family="sans-serif" font-size="104"' \
108+ ' font-weight="bold" fill="#ffe873" text-anchor="middle">Jn</text>' \
109+ '</svg>' > build/AppDir/libjava-demo.svg
110+ ln -sf libjava-demo.svg build/AppDir/.DirIcon
111+
112+ mkdir -p out
113+ ARCH="$arch" "$tool" build/AppDir "out/libjava-demo-$arch.AppImage"