build: Replace genisoimage with xorriso

xorriso and its mkisofs/genisoimage emulation alter-ego xorrisofs are
more maintained, and has the right toggles for us to achieve output
determinism without using blunt tools like faketime.

In this commit, we use xorrisofs from the build environment rather than
building it ourselves using depends. This is not necessary and can be
changed in the future.

From https://wiki.debian.org/genisoimage?action=recall&rev=11 :

> The classical command line interface for production of ISO 9660
> filesystem images is the option set established by program mkisofs.
> For reasons of licensing and other problems with its author, Debian
> ships a fork of mkisofs, called genisoimage, which was split off in
> 2006 and then developed independently.
>
> Meanwhile, genisoimage gets no new features and not even bug fixes. It
> is first choice only if its options -udf or -hfs are needed.
>
> Replacement in most uses cases, especially for bootable ISO 9660
> filesystems, archiving, and backup, is xorrisofs which starts the -as
> mkisofs emulation mode of program xorriso.

Makefile.am

@@ -138,7 +138,7 @@ $(APP_DIST_EXTRAS): $(APP_DIST_DIR)/$(OSX_APP)/Contents/MacOS/Bitcoin-Qt
 
 .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
+	$(XORRISOFS) -D -l -V "$(OSX_VOLNAME)" -no-pad -r -dir-mode 0755 -o $@ dist
 
 $(OSX_DMG): $(OSX_TEMP_ISO)
 	$(DMG) dmg "$<" "$@"

ci/test/00_setup_env_mac.sh

@@ -9,7 +9,7 @@ export LC_ALL=C.UTF-8
 export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:18.04  # Check that bionic can cross-compile to macos (bionic is used in the gitian build as well)
 export HOST=x86_64-apple-darwin18
-export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools"
+export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools xorriso"
 export XCODE_VERSION=11.3.1
 export XCODE_BUILD_ID=11C505
 export RUN_UNIT_TESTS=false

configure.ac

@@ -669,7 +669,7 @@ case $host in
            AC_PATH_TOOL([DSYMUTIL], [dsymutil], dsymutil)
            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([XORRISOFS], [xorrisofs], xorrisofs)
            AC_PATH_PROGS([DMG], [dmg], dmg)
            AC_PATH_PROGS([RSVG_CONVERT], [rsvg-convert rsvg],rsvg-convert)
            AC_PATH_PROGS([IMAGEMAGICK_CONVERT], [convert],convert)

contrib/gitian-descriptors/gitian-osx-signer.yml

@@ -7,6 +7,7 @@ architectures:
 - "amd64"
 packages:
 - "faketime"
+- "xorriso"
 remotes:
 - "url": "https://github.com/bitcoin-core/bitcoin-detached-sigs.git"
   "dir": "signature"
@@ -18,7 +19,7 @@ script: |
   WRAP_DIR=$HOME/wrapped
   mkdir -p ${WRAP_DIR}
   export PATH="$PWD":$PATH
-  FAKETIME_PROGS="dmg genisoimage"
+  FAKETIME_PROGS="dmg xorrisofs"
 
   # Create global faketime wrappers
   for prog in ${FAKETIME_PROGS}; do
@@ -36,5 +37,5 @@ script: |
   tar -xf ${UNSIGNED}
   OSX_VOLNAME="$(cat osx_volname)"
   ./detached-sig-apply.sh ${UNSIGNED} signature/osx
-  ${WRAP_DIR}/genisoimage -no-cache-inodes -D -l -probe -V "${OSX_VOLNAME}" -no-pad -r -dir-mode 0755 -apple -o uncompressed.dmg signed-app
+  ${WRAP_DIR}/xorrisofs -D -l -V "${OSX_VOLNAME}" -no-pad -r -dir-mode 0755 -o uncompressed.dmg signed-app
   ${WRAP_DIR}/dmg dmg uncompressed.dmg ${OUTDIR}/${SIGNED}

contrib/gitian-descriptors/gitian-osx.yml

@@ -28,6 +28,7 @@ packages:
 - "python3-dev"
 - "python3-setuptools"
 - "fonts-tuffy"
+- "xorriso"
 remotes:
 - "url": "https://github.com/bitcoin/bitcoin.git"
   "dir": "bitcoin"
@@ -38,9 +39,9 @@ script: |
 
   WRAP_DIR=$HOME/wrapped
   HOSTS="x86_64-apple-darwin18"
-  CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests GENISOIMAGE=$WRAP_DIR/genisoimage DMG=$WRAP_DIR/dmg"
+  CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests XORRISOFS=${WRAP_DIR}/xorrisofs DMG=${WRAP_DIR}/dmg"
   FAKETIME_HOST_PROGS=""
-  FAKETIME_PROGS="ar ranlib date dmg genisoimage"
+  FAKETIME_PROGS="ar ranlib date dmg xorrisofs"
 
   export QT_RCC_TEST=1
   export QT_RCC_SOURCE_DATE_OVERRIDE=1
@@ -136,7 +137,7 @@ script: |
     cp osx_volname unsigned-app-${i}/
     cp contrib/macdeploy/detached-sig-apply.sh unsigned-app-${i}
     cp contrib/macdeploy/detached-sig-create.sh unsigned-app-${i}
-    cp ${BASEPREFIX}/${i}/native/bin/dmg ${BASEPREFIX}/${i}/native/bin/genisoimage unsigned-app-${i}
+    cp ${BASEPREFIX}/${i}/native/bin/dmg unsigned-app-${i}
     cp ${BASEPREFIX}/${i}/native/bin/${i}-codesign_allocate unsigned-app-${i}/codesign_allocate
     cp ${BASEPREFIX}/${i}/native/bin/${i}-pagestuff unsigned-app-${i}/pagestuff
     mv dist unsigned-app-${i}

contrib/macdeploy/README.md

@@ -92,19 +92,15 @@ created using these tools. The build process has been designed to avoid includin
 SDK's files in Gitian's outputs. All interim tarballs are fully deterministic and may be freely
 redistributed.
 
-`genisoimage` is used to create the initial DMG. It is not deterministic as-is, so it has been
-patched. A system `genisoimage` will work fine, but it will not be deterministic because
-the file-order will change between invocations. The patch can be seen here: [cdrkit-deterministic.patch](https://github.com/bitcoin/bitcoin/blob/master/depends/patches/native_cdrkit/cdrkit-deterministic.patch).
-No effort was made to fix this cleanly, so it likely leaks memory badly, however it's only used for
-a single invocation, so that's no real concern.
+[`xorrisofs`](https://www.gnu.org/software/xorriso/) is used to create the DMG.
 
-`genisoimage` 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.
+`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 `genisoimage` would no longer be necessary.
+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.