Create macOS .dmg installer for CIAO

This repro contains a script and artifacts needed create a macOS .dmg file to install CIAO 4.17 (including full CALDB, sans source code) into the /Applications folder.

Walk through steps

1. Install CIAO using conda

Since ciao-install is borked, we use conda to install CIAO.

It must be installed in /Applications/ciao-4.17 so we use the -p (prefix) flag

conda create -p /Applications/ciao-${VER} \
  --copy --yes \
  -c https://cxc.cfa.harvard.edu/conda/ciao -c conda-forge \
  ciao pyciao ciao-contrib sherpa ds9 marx caldb_main

Note: you could add ciao-src pyciao-src sherpa-src if we wanted that. We decided to drop acis and hrc blank sky background files.

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2. Relocate and patch in files

To create the .dmg file we need to have a folder with

• ciao-4.17
• symlink to Applications folder

We can also add a background image that can be used to tell the user how to install (Drag folder to Applications).

We also made a copy of the instructions and put them into a README.txt

mkdir ${TMPDIR}
mv /Applications/ciao-${VER} ${TMPDIR}/
find ${TMPDIR}/ciao-${VER}  -type f \! -perm +u+w -exec chmod u+w {} \;

mkdir ${TMPDIR}/.background
cp ${BACKGROUND} ${TMPDIR}/.background

cp ${README} ${TMPDIR}/README.txt

ln -s /Applications ${TMPDIR}/

The find command was added to chmod the read-only files as they cause warnings when running xattr (below).

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2.1 Patch in setup scripts: ciao.sh and ciao.csh

This is a conda environment and does not use ciao.*sh for setup.

Instead is uses the files in the ciao-4.17/etc/conda/activate.d/*sh .

So I wrote two simple replacement setup scripts that source all the setup scripts in the activate.d directory.

To emulate the ciao-install setup scripts they also call the ciaover command. (The conda setup does not show the ciaover when the environment is activated).

cp ${PATCH_DIR}/ciao.*sh ${TMPDIR}/ciao-${VER}/bin/

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3 Create disk image (ie .dmg file)

Thanks to reviewing the ds9 Makefile, I learned about the hdiutil command that can be used to create disk images via the command line and manipulate them (create, attach, detach, convert).

First we need to create a read+write version of the .dmg

/bin/rm -f tmp_ciao-${VER}.dmg 
hdiutil create -size 19.1Gb -format UDRW  \
   -volname "CIAO ${VER}"  -srcfolder ${TMPDIR} tmp_ciao-${VER}.dmg 

The -size 19.1Gb is sufficient for CIAO 4.17 but will need to be reviewed/revised for future releases. fs = "file system" , HFS+J is the macOS file system. UDRW creates a read+write format disk image.

3.1 Set background image/patch in .DS_Store file

This step needs to be done manually the first time (or any time the background image changes).

First we need to attach (ie open) the disk image we just created.

hdiutil attach -readwrite tmp_ciao-${VER}.dmg

It will show up as a drive on the desktop.

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3.1.1 First time

Double click on the drive will open it in Finder.

You will see the ciao-4.17 folder, the Applications folder symbolic link, and the README.txt file.

Hit Cmd+Shift+. which will show the hidden files/folders. Double click to open the .background folder in a new Finder window.

Go back the original .dmg Finder window and right click. Select Show View Options and in the Background Options select Picture. Now drag the image install_w_readme.png to the background option. You should now see the installation instruction background

Close the .background finder window and hit Cmd+Shift+. to hide hidden files/folders.

Now re-arrange, resize icons & window as desired.

When done close the Finder window but do not eject the image yet.

Open the Terminal applications and copy the hidden, system .DS_Store file

(cd "/Volumes/CIAO ${VER}" ; cp .DS_Store ~/ciao-hack-DS_Store)

This file contains all the information about the icon location, size, background, window size, etc. Upshot: you can save this file and then next time you want to create the image, you just need to copy this file into place.

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3.3.2 After the first time

After the first time manually creating the .DS_Store file you can then just copy it onto the disk image. This is why the disk image needed to be created read+write. Note: Trying to copy the .DS_Store before the disk image is created doesn't work (or didn't work for me) so this requires this extra step.

(cd "/Volumes/CIAO ${VER}"; cp -fv ${DS_STORE} .DS_Store)

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4. Finish

First we detach the temp image now that the .DS_Store file has been created/copied.

hdiutil detach "/Volumes/CIAO ${VER}"

and finally we can create the compressed, read-only disk image

rm ciao-${VER}-${OS}.dmg
hdiutil convert tmp_ciao-${VER}.dmg -format UDZO -o ciao-${VER}-${OS}.dmg

rm tmp_ciao-${VER}.dmg

You may also want to go ahead and remove the ${TMPDIR}

Summary

Be sure to review/add/edit the README.txt file to make sure it matches the release.