Fast compilation

[TornaxO7]

Hello! I'm wondering how you're rebuilding the project after applying some changes because currently I'm always doing

flatpak-builder --user --force-clean flatpak-app build-aux/com.github.flxzt.rnote.Devel.json
&& flatpak-builder --run flatpak-app build-aux/com.github.flxzt.rnote.Devel.json rnote

which always takes so long since it wipes the flatpak-app directory, downloads all crates and compiles from the whole beginning which is a bit annoying...

[flxzt]

I am using the flatpak extension in vscode, which does partial builds automatically. I am not 100% sure what the extension does, I believe it creates the _build directory (where the meson project is configured and rust compiles the crates) on the host and exposes it to the flatpak environment on rebuilds so the artifacts are reused between builds. Here is its command output for rebuilding and running. It might help to figure out how to do it manually:

>>> flatpak build --share=network --nofilesystem=host --filesystem=/mnt/Daten/source/rnote --filesystem=/mnt/Daten/source/rnote/.flatpak/repo --env=CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=clang --env=CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS=-C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --env=CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=clang --env=CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUSTFLAGS=-C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --env=PATH=/home/felixz/.wasmtime/bin:/home/felixz/.local/bin:/home/felixz/.wasmtime/bin:/home/felixz/.local/bin:/home/felixz/.local/bin:/home/felixz/bin:/usr/lib64/ccache:/home/felixz/.cargo/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/usr/lib/sdk/rust-stable/bin:/usr/lib/sdk/llvm14/bin --env=LD_LIBRARY_PATH=/app/lib --env=PKG_CONFIG_PATH=/app/lib/pkgconfig:/app/share/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig --filesystem=/mnt/Daten/source/rnote/_build /mnt/Daten/source/rnote/.flatpak/repo ninja -C _build
ninja: Entering directory `_build'
ninja: no work to do.

>>> flatpak build --share=network --nofilesystem=host --filesystem=/mnt/Daten/source/rnote --filesystem=/mnt/Daten/source/rnote/.flatpak/repo --env=CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=clang --env=CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS=-C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --env=CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=clang --env=CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUSTFLAGS=-C link-arg=-fuse-ld=/usr/lib/sdk/rust-stable/bin/mold --env=PATH=/home/felixz/.wasmtime/bin:/home/felixz/.local/bin:/home/felixz/.wasmtime/bin:/home/felixz/.local/bin:/home/felixz/.local/bin:/home/felixz/bin:/usr/lib64/ccache:/home/felixz/.cargo/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/usr/lib/sdk/rust-stable/bin:/usr/lib/sdk/llvm14/bin --env=LD_LIBRARY_PATH=/app/lib --env=PKG_CONFIG_PATH=/app/lib/pkgconfig:/app/share/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig --filesystem=/mnt/Daten/source/rnote/_build /mnt/Daten/source/rnote/.flatpak/repo meson install -C _build

>>> flatpak build --with-appdir --allow=devel --bind-mount=/run/user/1000/doc=/run/user/1000/doc/by-app/com.github.flxzt.rnote.Devel --socket=wayland --socket=fallback-x11 --device=dri --share=ipc --socket=pulseaudio --filesystem=xdg-config --filesystem=xdg-documents --filesystem=xdg-pictures --filesystem=xdg-desktop --filesystem=xdg-run/gvfs --filesystem=xdg-run/gvfsd --env=RUST_BACKTRACE=full --env=RUST_LOG=rnote=debug --env=G_MESSAGES_DEBUG=all --env=GTK_PATH=/app/lib/gtk-4.0 --env=GST_DEBUG=3 --talk-name=org.freedesktop.portal.* --talk-name=org.a11y.Bus --env=LANG=de_DE.UTF-8 --env=DESKTOP_SESSION=gnome-xorg --env=XDG_CURRENT_DESKTOP=GNOME --env=XDG_SESSION_DESKTOP=gnome-xorg --env=XDG_SESSION_TYPE=x11 /mnt/Daten/source/rnote/.flatpak/repo rnote