Re: Question: Extracting PKG Image Assets?

19 Feb 2025

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The bashscript I use to expand an installer pkg is below.
Sample arguments to run the script would be,

Where
the directory you'll expand to is the first argument
a subdirectory for each component goes into the path at the 2nd arg, where it
is intended to be a subfolder of the first
a directory that holds the original pkg, the one you'd like to expand, is in
the 3rd argument
the name of the installer, including the .pkg extension, is in the final 4th
argument

./expandpkg.sh installer-layout installer-layout/PackagesInstallerTest1
~/Downloads InstallerTest1.pkg

Image assets will be expected to arrive in a dist/Resources directory under the
installer-layout/InstallerBuildInstallerTest1 directory.

acquirepackage()
{
  shortpackagename=`echo $packagename | perl -e '$line = <>;if
($line=~/^(.+)\.pkg$/){print $1;}'`
  /bin/rm -Rf "$packagedir""/$shortpackagename"
  /bin/mkdir "$packagedir""/$shortpackagename"
  /usr/sbin/chown root:admin "$packagedir""/$shortpackagename"
  /bin/chmod 775 "$packagedir""/$shortpackagename"
  /bin/mkdir "$packagedir""/$shortpackagename""/info"
  /usr/sbin/chown root:admin "$packagedir""/$shortpackagename""/info"
  /bin/chmod 775 "$packagedir""/$shortpackagename""/info"
  /usr/bin/rsync -avzE "$installexpanddir""/""$packagename""/PackageInfo"
"$packagedir""/$shortpackagename""/info/Info.plist"
  if [ -a "$packagedir""/$shortpackagename""/tempdir" ]; then
    /bin/rm -Rf "$packagedir""/$shortpackagename""/tempdir"
  fi
  /bin/mkdir "$packagedir""/$shortpackagename""/tempdir"
  /usr/sbin/chown root:admin "$packagedir""/$shortpackagename""/tempdir"
  /bin/chmod 775 "$packagedir""/$shortpackagename""/tempdir"
  /usr/bin/rsync -avzE "$installexpanddir""/""$packagename""/Payload"
"$packagedir""/$shortpackagename""/tempdir""/Archive.pax.gz"
  /usr/bin/gunzip "$packagedir""/$shortpackagename""/tempdir""/Archive.pax.gz"
  if [ -a "$packagedir""/$shortpackagename""/component" ]; then
    /bin/rm -Rf "$packagedir""/$shortpackagename""/component"
  fi
  /bin/mkdir "$packagedir""/$shortpackagename""/component"
  /usr/sbin/chown root:admin "$packagedir""/$shortpackagename""/component"
  /bin/chmod 775 "$packagedir""/$shortpackagename""/component"
  /usr/bin/rsync -avzE "$packagedir""/$shortpackagename""/tempdir/Archive.pax"
"$packagedir""/$shortpackagename""/component/Archive.pax"
  cd "$packagedir""/$shortpackagename""/component"
  /bin/pax -r -f "$packagedir""/$shortpackagename""/component/Archive.pax"
  /bin/rm -f "$packagedir""/$shortpackagename""/component/Archive.pax"
  if [ -a "$packagedir""/$shortpackagename""/extras" ]; then
    /bin/rm -Rf "$packagedir""/$shortpackagename""/extras"
  fi
  /bin/mkdir "$packagedir""/$shortpackagename""/extras"
  /usr/sbin/chown root:admin "$packagedir""/$shortpackagename""/extras"
  /bin/chmod 775 "$packagedir""/$shortpackagename""/extras"

  if [ -f "$installexpanddir""/""$packagename""/Scripts/""preinstall" ]; then
    rsync -avz "$installexpanddir""/""$packagename""/Scripts/""preinstall"
"$packagedir""/$shortpackagename""/extras/preinstall"
  fi
  if [ -f "$installexpanddir""/""$packagename""/Scripts/""postinstall" ]; then
    rsync -avz "$installexpanddir""/""$packagename""/Scripts/""postinstall"
"$packagedir""/$shortpackagename""/extras/postinstall"
  fi

  #cleanup
  if [ -a "$packagedir""/$shortpackagename""/tempdir" ]; then
    /bin/rm -Rf "$packagedir""/$shortpackagename""/tempdir"
  fi
}

phase="Set original installer, package output dir, and new installer's build
dir"

installerprojectdir="$1"

packagedir="$2"
if ! [ -a "$packagedir" ]; then
  /bin/mkdir "$2"
  chmod 775 "$2"
  chown root:admin "$2"
fi

originaldir="$3"

originstallername="$4"

phase="checkdirs"
if ! [ -a "$originaldir""/""$originstallername" ]; then
  echo "$originaldir""/""$originstallername"
  echo "$phase";exit 1
fi
if ! [ -d "$packagedir" ]; then
  echo "$packagedir"
  echo "$phase";exit 1
fi
installername="$originstallername";
shortorigname=`echo $originstallername | perl -e '$line = <>;if
($line=~/^(.+)\.pkg$/){print $1;}'`

installbuilddir="$installerprojectdir""/InstallerBuild_""$shortorigname"
if [ -a "$installbuilddir" ]; then
  /bin/rm -Rf "$installbuilddir"
fi
if [ -a "$installbuilddir" ]; then
  echo "$installbuilddir"
  echo "$phase";exit 1
fi
/bin/mkdir "$installbuilddir"
/usr/sbin/chown root:admin "$installbuilddir"
/bin/chmod 775 "$installbuilddir"
if ! [ -d "$installbuilddir" ]; then
  echo "$installbuilddir"
  echo "$phase";exit 1
fi

phase="expand"
installexpanddir="$installbuilddir""/expanded"
if [ -a "$installexpanddir" ]; then
  /bin/rm -Rf "$installexpanddir"
fi
if [ -a "$installexpanddir" ]; then
  echo "$installexpanddir"
  echo "$phase";exit 1
fi
if ! [ -a "$originaldir""/""$originstallername" ]; then
  echo "$originaldir""/""$originstallername"
  echo "$phase";exit 1
fi
/usr/sbin/pkgutil --expand "$originaldir""/""$originstallername"
"$installexpanddir"
if ! [ -d "$installexpanddir" ]; then
  echo "$installexpanddir"
  echo "$phase";exit 1
fi
/usr/sbin/chown -R root:admin "$installexpanddir"
/bin/chmod -R 775 "$installexpanddir"
if ! [ -f "$installexpanddir""/Distribution" ]; then
  echo "$installexpanddir""/Distribution"
  echo "$phase";exit 1
fi
/bin/mkdir "$installbuilddir""/dist"
/usr/sbin/chown root:admin "$installbuilddir""/dist"
/bin/chmod 775 "$installbuilddir""/dist"

phase="acquire dist material"
if ! [ -d "$installexpanddir" ]; then
  echo "$installexpanddir"
  echo "$phase";exit 1
fi
if ! [ -f "$installexpanddir""/Distribution" ]; then
  echo "$installexpanddir""/Distribution"
  echo "$phase";exit 1
fi
/bin/mkdir "$installbuilddir""/dist"
/usr/sbin/chown root:admin "$installbuilddir""/dist"
/bin/chmod 775 "$installbuilddir""/dist"

if ! [ -d "$installbuilddir""/dist" ]; then
  echo "$phase";exit 1
fi
/usr/bin/rsync -avzE "$installexpanddir""/Distribution"
"$installbuilddir""/dist/distribution.dist"
if ! [ -f "$installbuilddir""/dist/distribution.dist" ]; then
  echo "$phase";exit 1
fi

if ! [ -d "$installexpanddir""/""Resources" ]; then
  echo ""
  #echo "$phase";exit 1
fi
/bin/mkdir "$installbuilddir""/resources"
/usr/sbin/chown root:admin "$installbuilddir""/resources"
/bin/chmod 775 "$installbuilddir""/resources"

if ! [ -d "$installbuilddir""/resources" ]; then
  echo "$phase";exit 1
fi
/usr/bin/rsync -avzE "$installexpanddir""/""Resources"
"$installbuilddir""/resources"
if [ -d "$installexpanddir""/Plugins" ]; then
  if [ -a "$installbuilddir""/Plugins.zip" ]; then
    /bin/rm -Rf "$installbuilddir""/Plugins.zip"
  fi
  if [ -a "$installbuilddir""/Plugins.zip" ]; then
    echo "$phase";exit 1
  fi
  /usr/bin/ditto -c -k --rsrc --keepParent "$installexpanddir""/Plugins"
"$installbuilddir""/Plugins.zip"
  /usr/sbin/chown root:admin "$installbuilddir""/Plugins.zip"
  /bin/chmod 775 "$installbuilddir""/Plugins.zip"

  if ! [ -f "$installbuilddir""/Plugins.zip" ]; then
    echo "$phase";exit 1
  fi
  hasplugin=yes
else
  hasplugin=no
fi

phase="list packages"
/bin/ls -1 "$installexpanddir" | egrep -i '.*\.pkg$' >
"$installbuilddir""/packagelist.txt"
chmod 666 "$installbuilddir""/packagelist.txt"
for packagename in `/bin/cat "$installbuilddir""/packagelist.txt"`
do
    if [ -n "$packagename" ]; then
        acquirepackage
    fi
done
exit 0
...
On Feb 18, 2025, at 3:00 PM, installer-dev-request@lists.apple.com wrote:
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Today's Topics:
1. Question: Extracting PKG Image Assets? (Sinan Karaca)
  2. Re: Question: Extracting PKG Image Assets? (Johan Landin)
  3. Re: Question: Extracting PKG Image Assets? (Sinan Karaca)
From: Sinan Karaca <bhatiaviresh@icloud.com>
Subject: Question: Extracting PKG Image Assets?
Date: February 18, 2025 at 4:50:53 AM EST
To: installer-dev@lists.apple.com
Dear Developers,
How would I extract the assets contained in the PKG user interface itself
(the wizard screens - blue dots, green checkmarks, etc.)?
Thanks,
VB
From: Johan Landin <jol@ensys.se>
Subject: Re: Question: Extracting PKG Image Assets?
Date: February 18, 2025 at 6:31:22 AM EST
To: Sinan Karaca <bhatiaviresh@icloud.com>
Cc: Installer-dev@lists.apple.com
I sugget that you use "Suspicious Package” which can be downloaded from
https://www.mothersruin.com/software/SuspiciousPackage/
Best Regards
     /Johan Landin
...
On 18 Feb 2025, at 10:50, Sinan Karaca via Installer-dev
<installer-dev@lists.apple.com> wrote:
Dear Developers,
How would I extract the assets contained in the PKG user interface itself
(the wizard screens - blue dots, green checkmarks, etc.)?
Thanks,
VB
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From: Sinan Karaca <bhatiaviresh@icloud.com>
Subject: Re: Question: Extracting PKG Image Assets?
Date: February 18, 2025 at 7:13:01 AM EST
To: Johan Landin <jol@ensys.se>
Cc: Installer-dev@lists.apple.com
The goal is not to look inside what’s contained within packages, but to
extract the bitmaps/icons/dialogs used in the package installer itself (not
the payload, but the package UI).
...
On Feb 18, 2025, at 14:31, Johan Landin <jol@ensys.se> wrote:
I sugget that you use "Suspicious Package” which can be downloaded from
https://www.mothersruin.com/software/SuspiciousPackage/
Best Regards
    /Johan Landin
...
On 18 Feb 2025, at 10:50, Sinan Karaca via Installer-dev
<installer-dev@lists.apple.com> wrote:
Dear Developers,
How would I extract the assets contained in the PKG user interface itself
(the wizard screens - blue dots, green checkmarks, etc.)?
Thanks,
VB
_______________________________________________
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