DDOG - creating a squashfs file for cctv-viewer.

[dcung]

I search and read the forum for "How to create SFS/squashfs file".

Which I summarize:
- Collect/identify all dependency
- Extract from .deb
- Merge the content (except DEBIAN folders)

Now, I have successfully created and tested that the squashfs file works - for Bookworm.

As I have to do this again for Bullseye...(The app is kernel dependent, so I have to use different app binary)
I just want to semi 'automate' what I did manually. Too many files to do manually.
Sort of, graduate from 'dumb dumb' class to 'semi dumb dumb' class...

But I still could not get the 'merging' part working.
Manually, I just drag and drop "usr" dir somewhere and merged them in any file-manager.

Code: Select all

#!/bin/bash

for file in *.deb 
do 
redeb ${file} 
done

#Done extracting each deb - move it out of here.
! [ -e "../debs" ] && mkdir ../debs
mv *.deb ../debs

for file in *
do
mv -f ${file}/usr ../sfs-create
done

I'm getting this for every directory...
mv: cannot move 'qml-module-qtquick-window2_5.15.8+dfsg-3_amd64/usr' to '../sfs-create/usr': Directory not empty

I thought, asking here is faster than me trying all sort of mv parameters...

[fredx181]

@dcung I'd use cp instead of mv because mv doesn't like to overwrite non-empty folders, then last block: (important to first create ../sfs-create folder)

Code: Select all

mkdir ../sfs-create
for file in *
do
cp -af ${file}/usr ../sfs-create/
done

edit: to explain why you need to create../sfs-create folder first:
If you don't, ... the first run in the for loop will copy ${file}/usr to ../sfs-create, but not inside it (as it doesn't exist yet), then in fact it does just rename to ../sfs-create

Or the whole script like this (different approach, using dpkg-deb rather than redeb) :

Code: Select all

# extract all debs here and merge at the same time
for file in *.deb 
do 
dpkg-deb -x ${file} .
done

# move usr folder to ../sfs-create/
mkdir ../sfs-create
mv -f usr ../sfs-create/

[dcung]

Or the whole script like this (different approach, using dpkg-deb rather than redeb) :
...

I thought of using cp instead of mv.
But used mv since I can visibly see the usr dir disappears - sort of unreliable 'error' checking.

I tried both of your suggestions and both are working. Both produces the same amount of files/directories - which is good - just my simple 'verification' method.

But now that I have the luxury of choices, I'll choose the dpkg-deb extract method.
More elegant and importantly, less 'cleanup' to do afterward.

Thank you @fredx181