build: don't compress macOS DMG

contrib/guix/libexec/build.sh

@@ -79,19 +79,6 @@ prepend_to_search_env_var() {
     export "${1}=${2}${!1:+:}${!1}"
 }
 
-case "$HOST" in
-    *darwin*)
-        # When targeting darwin, zlib is required by native_libdmg-hfsplus.
-        zlib_store_path=$(store_path "zlib")
-        zlib_static_store_path=$(store_path "zlib" static)
-
-        prepend_to_search_env_var LIBRARY_PATH "${zlib_static_store_path}/lib:${zlib_store_path}/lib"
-        prepend_to_search_env_var C_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var CPLUS_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var OBJC_INCLUDE_PATH "${zlib_store_path}/include"
-        prepend_to_search_env_var OBJCPLUS_INCLUDE_PATH "${zlib_store_path}/include"
-esac
-
 # Set environment variables to point the CROSS toolchain to the right
 # includes/libs for $HOST
 case "$HOST" in
@@ -332,8 +319,7 @@ mkdir -p "$DISTSRC"
             mkdir -p "unsigned-app-${HOST}"
             cp  --target-directory="unsigned-app-${HOST}" \
                 osx_volname \
-                contrib/macdeploy/detached-sig-create.sh \
-                "${BASEPREFIX}/${HOST}"/native/bin/dmg
+                contrib/macdeploy/detached-sig-create.sh
             mv --target-directory="unsigned-app-${HOST}" dist
             (
                 cd "unsigned-app-${HOST}"

contrib/guix/libexec/codesign.sh

@@ -84,14 +84,11 @@ mkdir -p "$DISTSRC"
             # Apply detached codesignatures to dist/ (in-place)
             signapple apply dist/Bitcoin-Qt.app codesignatures/osx/dist
 
-            # Make an uncompressed DMG from dist/
+            # Make a DMG from dist/
             xorrisofs -D -l -V "$(< osx_volname)" -no-pad -r -dir-mode 0755 \
-                      -o uncompressed.dmg \
+                      -o "${OUTDIR}/${DISTNAME}-${HOST}.dmg" \
                       dist \
                       -- -volume_date all_file_dates ="$SOURCE_DATE_EPOCH"
-
-            # Compress uncompressed.dmg and output to OUTDIR
-            ./dmg dmg uncompressed.dmg "${OUTDIR}/${DISTNAME}-${HOST}.dmg"
             ;;
         *)
             exit 1

contrib/guix/manifest.scm

@@ -572,8 +572,6 @@ inspecting signatures in Mach-O binaries.")
         bzip2
         gzip
         xz
-        zlib
-        (list zlib "static")
         ;; Build tools
         gnu-make
         libtool

contrib/macdeploy/README.md

@@ -89,16 +89,7 @@ redistributed.
 
 [`xorrisofs`](https://www.gnu.org/software/xorriso/) is used to create the DMG.
 
-`xorrisofs` cannot compress DMGs, so afterwards, the DMG tool from the
-`libdmg-hfsplus` project is used to compress it. There are several bugs in this
-tool and its maintainer has seemingly abandoned the project.
-
-The DMG tool has the ability to create DMGs from scratch as well, but this functionality is
-broken. Only the compression feature is currently used. Ideally, the creation could be fixed
-and `xorrisofs` would no longer be necessary.
-
-Background images and other features can be added to DMG files by inserting a
-`.DS_Store` during creation.
+A background image is added to DMG files by inserting a `.DS_Store` during creation.
 
 As of OS X 10.9 Mavericks, using an Apple-blessed key to sign binaries is a requirement in
 order to satisfy the new Gatekeeper requirements. Because this private key cannot be