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+# Borg 2.0.0b5 One-File Build (Variante B: **ohne** FUSE/mount)
+
+Diese Variante erzeugt ein **kleineres Binary**, das alle Borg-Funktionen außer `mount` unterstützt. Build-Host: **Debian Bookworm**. Ziel: **Debian Trixie**.
+
+## Voraussetzungen (Bookworm)
+
+```bash
+sudo apt update
+sudo apt install -y git python3-venv python3-dev build-essential pkg-config \
+  libssl-dev libxxhash-dev liblz4-dev libzstd-dev libacl1-dev \
+  liblzma-dev libb2-dev ca-certificates
+```
+
+## Build per Skript
+
+```bash
+chmod +x build-nofuse.sh
+./build-nofuse.sh
+```
+
+Ergebnis: `/opt/borg2-b5-build/dist/borg2-b5`
+
+## Manuell (Kurzfassung)
+
+```bash
+python3 -m venv /opt/borg2-b5-build
+source /opt/borg2-b5-build/bin/activate
+python -m pip install -U "pip<25" "setuptools<70" wheel "Cython==0.29.36" pkgconfig "setuptools-scm<8"
+
+cd /opt
+git clone --depth 1 --branch 2.0.0b5 https://github.com/borgbackup/borg.git borg-b5-src
+
+export PKG_CONFIG_PATH=/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/lib/pkgconfig
+export BORG_CYTHONIZE=1
+export BORG_OPENSSL_PREFIX=/usr
+export BORG_LIBXXHASH_PREFIX=/usr
+export BORG_LIBLZ4_PREFIX=/usr
+export BORG_LIBZSTD_PREFIX=/usr
+export BORG_LIBB2_PREFIX=/usr
+export BORG_LIBLZMA_PREFIX=/usr
+export BORG_LIBACL_PREFIX=/usr
+
+cd /opt/borg-b5-src
+python -m pip install --no-build-isolation --no-cache-dir .
+
+cd /
+python - <<'PY'
+import borg, sys, inspect
+print("borg", borg.__version__, "python", sys.version.split()[0])
+print("from:", inspect.getsourcefile(borg) or borg.__file__)
+PY
+
+cat > /opt/borg2-b5-build/borg2_entry.py <<'EOF'
+import os, sys, types
+os.environ.setdefault("BORG_SELFTEST", "disabled")
+m = types.ModuleType("borg.selftest")
+def _selftest(*a, **kw): return 0
+m.selftest = _selftest
+sys.modules["borg.selftest"] = m
+ver = types.ModuleType("borg._version")
+ver.version = "2.0.0b5"
+sys.modules["borg._version"] = ver
+import borg.archiver as A
+if __name__ == "__main__":
+    A.main()
+EOF
+
+python -m pip install "pyinstaller>=6,<7"
+cd /opt/borg2-b5-build
+python -m PyInstaller -F -n borg2-b5 -c borg2_entry.py \
+  --collect-data borg --collect-binaries borg \
+  --exclude-module borg.testsuite \
+  --hidden-import=packaging.version --hidden-import=packaging.specifiers \
+  --clean -y
+
+./dist/borg2-b5 --version
+```
+
+## Deployment (Trixie)
+
+```bash
+scp /opt/borg2-b5-build/dist/borg2-b5 root@trixie:/usr/local/bin/
+ssh root@trixie 'chmod +x /usr/local/bin/borg2-b5 && borg2-b5 --version'
+```
+
+## Nutzung (Beispiele)
+
+```bash
+export BORG_REMOTE_PATH=borg2
+borg2-b5 rlist  ssh://borg@backup-server/srv/borg-repos/deb12
+borg2-b5 create --stats \
+  ssh://borg@backup-server/srv/borg-repos/deb12::'{now:%Y-%m-%d_%H%M%S}' \
+  /etc /var/www
+```
+
+## Unterschiede zu Variante A (mit FUSE)
+
+- Kein `pyfuse3` installiert, keine `--collect-all pyfuse3` im Build.
+- `borg mount` ist **nicht** verfügbar.
+- Binary ist kleiner, Build schneller.