From 523a69698b976e468a2f6b0a280c560246b88d7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <francois@beafrancois.fr>
Date: Sat, 30 May 2026 10:56:16 +0200
Subject: [PATCH] build_all --ram: exclude flatpak from tmpfs (rofiles-fuse
 can't mount /dev/shm)
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flatpak-builder mounts its state dir via rofiles-fuse; FUSE mounts fail on
/dev/shm ('fusermount: Permission denied'). So --ram no longer redirects the
flatpak dirs — it builds on disk as before. PyInstaller workpath, AppImage
AppDir and TMPDIR/PIP_CACHE_DIR still go to tmpfs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 build_all.sh | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/build_all.sh b/build_all.sh
index b0231d3..ae390f4 100755
--- a/build_all.sh
+++ b/build_all.sh
@@ -21,9 +21,10 @@
 # log of any failing step is printed at the end.
 #
 # Pass --ram to redirect the per-channel build scratch (PyInstaller workpath,
-# Flatpak build dir + ostree repo, AppImage AppDir) and TMPDIR/PIP_CACHE_DIR to
-# /dev/shm, and skip UPX. Big speedup on slow/flash storage. On a RAM-limited
-# machine combine with --serial (e.g. ./build_all.sh --ram --serial).
+# AppImage AppDir) and TMPDIR/PIP_CACHE_DIR to /dev/shm, and skip UPX. Big
+# speedup on slow/flash storage. Flatpak is excluded (its rofiles-fuse can't
+# mount on /dev/shm), so it still builds on disk. On a RAM-limited machine
+# combine with --serial (e.g. ./build_all.sh --ram --serial).
 #
 # All artifacts are collected (copied) under <repo>/dist/. Original outputs in
 # src/dist/, package/*/dist/, doc/manual/ are left in place. Wheel and AppImage
@@ -83,24 +84,22 @@ source "$SCRIPT_DIR/scripts/set_env.sh"
 
 # ---------- RAM mode: put build scratch on tmpfs (--ram) ----------------------
 # On slow storage (USB stick, SD card) the per-channel build dirs and temp
-# churn dominate. --ram redirects them to /dev/shm and skips UPX. The whole
-# Flatpak working set (build dir + .flatpak-builder + repo) goes to tmpfs
-# because flatpak-builder requires its state dir on the same filesystem as the
-# build dir — so its download cache doesn't persist across --ram runs. The
-# tmpfs scratch is freed on exit.
+# churn dominate. --ram redirects the PyInstaller workpath, the AppImage AppDir
+# and TMPDIR/PIP_CACHE_DIR to /dev/shm, and skips UPX. Flatpak is intentionally
+# NOT moved: flatpak-builder mounts its state dir with rofiles-fuse, and FUSE
+# can't mount on /dev/shm (fusermount: Permission denied) — so it builds on
+# disk. The tmpfs scratch is freed on exit.
 if [ "$RAM" -eq 1 ]; then
     RAMROOT="/dev/shm/testium-build-${VERSION}"
     echo "-- RAM mode: build scratch under $RAMROOT (tmpfs), freed on exit"
+    echo "   (flatpak builds on disk — rofiles-fuse can't mount on /dev/shm)"
     rm -rf "$RAMROOT"
-    mkdir -p "$RAMROOT"/{tmp,pip,pyi-work,flatpak-build,flatpak-state,flatpak-repo,appdir}
+    mkdir -p "$RAMROOT"/{tmp,pip,pyi-work,appdir}
     export TMPDIR="$RAMROOT/tmp"
     export PIP_CACHE_DIR="$RAMROOT/pip"
     export PYI_WORKPATH="$RAMROOT/pyi-work"            # pyinstaller --workpath
-    export FLATPAK_BUILDDIR="$RAMROOT/flatpak-build"   # flatpak-builder build dir
-    export FLATPAK_STATEDIR="$RAMROOT/flatpak-state"   # .flatpak-builder (same fs as build dir, required)
-    export FLATPAK_REPODIR="$RAMROOT/flatpak-repo"     # ostree repo
-    export APPIMAGE_APPDIR_TMPFS="$RAMROOT/appdir"    # AppDir bind-mount
-    export TESTIUM_NO_UPX=1                           # skip slow UPX in the spec
+    export APPIMAGE_APPDIR_TMPFS="$RAMROOT/appdir"     # AppDir bind-mount
+    export TESTIUM_NO_UPX=1                            # skip slow UPX in the spec
     trap 'rm -rf "$RAMROOT"' EXIT
     if [ "$SERIAL" -ne 1 ]; then
         echo "   note: with --ram, prefer adding --serial so each step gets the"