Fix DEB and RPM package compression for smaller installer sizes (#20689)

* Fix DEB and RPM package compression for smaller installer sizes

DEB packages were using poor compression defaults: the GUI DEB used
electron-builder's 7-Zip xz with a 4 MiB dictionary, and the CLI DEB
used the build host's default zstd level 3. Both RPMs lacked explicit
single-threaded xz settings. All four packages now use xz level 6
(64 MiB dictionary) for consistent, well-compressed output.

Made-with: Cursor

* Bump compression level to 9 for 64 MiB xz dictionary

Level 6 only gives an 8 MiB dictionary. Level 9 gives 64 MiB,
matching the compression ratio seen in the existing GUI RPM.

Made-with: Cursor

build_scripts/build_linux_deb-2-installer.sh

@@ -69,7 +69,7 @@ cp assets/systemd/*.service "dist/$CLI_DEB_BASE/etc/systemd/system/"
 cp -r dist/daemon/* "dist/$CLI_DEB_BASE/opt/chia/"
 
 ln -s ../../opt/chia/chia "dist/$CLI_DEB_BASE/usr/bin/chia"
-dpkg-deb --build --root-owner-group "dist/$CLI_DEB_BASE"
+dpkg-deb -Zxz -z9 --build --root-owner-group "dist/$CLI_DEB_BASE"
 # CLI only .deb done
 
 cp -r dist/daemon ../chia-blockchain-gui/packages/gui

build_scripts/build_linux_rpm-2-installer.sh

@@ -87,8 +87,8 @@ fpm -s dir -t rpm \
   --rpm-tag '%undefine _missing_build_ids_terminate_build' \
   --before-install=assets/rpm/before-install.sh \
   --rpm-tag 'Requires(pre): findutils' \
-  --rpm-compression xzmt \
-  --rpm-compression-level 6 \
+  --rpm-compression xz \
+  --rpm-compression-level 9 \
   .
 # CLI only rpm done
 cp -r dist/daemon ../chia-blockchain-gui/packages/gui

build_scripts/electron-builder.json

@@ -78,6 +78,7 @@
   "deb": {
     "afterInstall": "../../../build_scripts/assets/deb/postinst.sh",
     "afterRemove": "../../../build_scripts/assets/deb/prerm.sh",
+    "fpm": ["--deb-compression", "xz", "--deb-compression-level", "9"],
     "depends": [
       "libgbm1",
       "libgtk-3-0",
@@ -103,7 +104,9 @@
       "--rpm-tag=Recommends: libxcrypt-compat",
       "--directories=/opt/chia",
       "--rpm-tag=Requires(pre): findutils",
-      "--before-install=../../../build_scripts/assets/rpm/before-install.sh"
+      "--before-install=../../../build_scripts/assets/rpm/before-install.sh",
+      "--rpm-compression=xz",
+      "--rpm-compression-level=9"
     ]
   }
 }