build: Run libdmg-hfsplus's DMG tool in make deploy

Previously, the compression of the .iso file to a .dmg file was done
outside of `make deploy' in order to use the faketime-wrapped version of
libdmg-hfsplus's DMG tool.

Specifying the faketime-wrapped version of the DMG tool to ./configure
fixes this and simplifies build scripts.

.gitignore

@@ -76,6 +76,7 @@ src/qt/bitcoin-qt.includes
 *.log
 *.trs
 *.dmg
+*.iso
 
 *.json.h
 *.raw.h

Makefile.am

@@ -35,6 +35,7 @@ space := $(empty) $(empty)
 OSX_APP=Bitcoin-Qt.app
 OSX_VOLNAME = $(subst $(space),-,$(PACKAGE_NAME))
 OSX_DMG = $(OSX_VOLNAME).dmg
+OSX_TEMP_ISO = $(OSX_DMG:.dmg=).temp.iso
 OSX_BACKGROUND_SVG=background.svg
 OSX_BACKGROUND_IMAGE=background.tiff
 OSX_BACKGROUND_IMAGE_DPIS=36 72
@@ -135,9 +136,13 @@ $(APP_DIST_DIR)/Applications:
 
 $(APP_DIST_EXTRAS): $(APP_DIST_DIR)/$(OSX_APP)/Contents/MacOS/Bitcoin-Qt
 
-$(OSX_DMG): $(APP_DIST_EXTRAS)
+.INTERMEDIATE: $(OSX_TEMP_ISO)
+$(OSX_TEMP_ISO): $(APP_DIST_EXTRAS)
 	$(GENISOIMAGE) -no-cache-inodes -D -l -probe -V "$(OSX_VOLNAME)" -no-pad -r -dir-mode 0755 -apple -o $@ dist
 
+$(OSX_DMG): $(OSX_TEMP_ISO)
+	$(DMG) dmg "$<" "$@"
+
 dpi%.$(OSX_BACKGROUND_IMAGE): contrib/macdeploy/$(OSX_BACKGROUND_SVG)
 	sed 's/PACKAGE_NAME/$(PACKAGE_NAME)/' < "$<" | $(RSVG_CONVERT) -f png -d $* -p $* | $(IMAGEMAGICK_CONVERT) - $@
 OSX_BACKGROUND_IMAGE_DPIFILES := $(foreach dpi,$(OSX_BACKGROUND_IMAGE_DPIS),dpi$(dpi).$(OSX_BACKGROUND_IMAGE))

configure.ac

@@ -670,6 +670,7 @@ case $host in
            AC_PATH_TOOL([INSTALLNAMETOOL], [install_name_tool], install_name_tool)
            AC_PATH_TOOL([OTOOL], [otool], otool)
            AC_PATH_PROGS([GENISOIMAGE], [genisoimage mkisofs],genisoimage)
+           AC_PATH_PROGS([DMG], [dmg], dmg)
            AC_PATH_PROGS([RSVG_CONVERT], [rsvg-convert rsvg],rsvg-convert)
            AC_PATH_PROGS([IMAGEMAGICK_CONVERT], [convert],convert)
            AC_PATH_PROGS([TIFFCP], [tiffcp],tiffcp)

contrib/gitian-descriptors/gitian-osx.yml

@@ -38,7 +38,7 @@ script: |
 
   WRAP_DIR=$HOME/wrapped
   HOSTS="x86_64-apple-darwin18"
-  CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests GENISOIMAGE=$WRAP_DIR/genisoimage"
+  CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests GENISOIMAGE=$WRAP_DIR/genisoimage DMG=$WRAP_DIR/dmg"
   FAKETIME_HOST_PROGS=""
   FAKETIME_PROGS="ar ranlib date dmg genisoimage"
 
@@ -132,7 +132,6 @@ script: |
 
     make osx_volname
     make deploydir
-    OSX_VOLNAME="$(cat osx_volname)"
     mkdir -p unsigned-app-${i}
     cp osx_volname unsigned-app-${i}/
     cp contrib/macdeploy/detached-sig-apply.sh unsigned-app-${i}
@@ -145,8 +144,7 @@ script: |
     find . | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-osx-unsigned.tar.gz
     popd
 
-    make deploy
-    ${WRAP_DIR}/dmg dmg "${OSX_VOLNAME}.dmg" ${OUTDIR}/${DISTNAME}-osx-unsigned.dmg
+    make deploy OSX_DMG="${OUTDIR}/${DISTNAME}-osx-unsigned.dmg"
 
     cd installed
     find . -name "lib*.la" -delete