flatpak-builder hardlinks between its state dir and the build dir, so they must
share a filesystem. With only the build dir on tmpfs it errored ('state dir not
on the same filesystem as the target dir'). Move .flatpak-builder to tmpfs as
well via FLATPAK_STATEDIR; its download cache no longer persists across --ram
runs, which is the accepted trade for the tmpfs speedup.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Redirect the per-channel build scratch to /dev/shm and skip UPX, a big win when
building from a USB stick / SD card (I/O-bound on flash):
- TMPDIR + PIP_CACHE_DIR -> tmpfs
- PyInstaller: --workpath -> tmpfs (PYI_WORKPATH); UPX off via TESTIUM_NO_UPX
- Flatpak: build dir + ostree repo -> tmpfs (FLATPAK_BUILDDIR/REPODIR); the
.flatpak-builder download cache stays on disk
- AppImage: bind-mount a tmpfs dir at the in-container AppDir path
(APPIMAGE_APPDIR_TMPFS)
Scratch is freed on exit. Each build.sh honors the env vars with on-disk
defaults, so behavior is unchanged without --ram. With --ram, prefer --serial
on RAM-limited machines (flatpak+appimage are ~1 GB each).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
org.testium.Testium.yaml uses host Python/Lua only (no bundled interpreter).
build.sh exports a .flatpak bundle. README documents the install procedure.
