Rename files and append parent directory name to filenames?

Question

I am trying to rename files and append their parent directory name to them (and move them to a new folder named Photos).

I've been trying to do this with rename and mmv, but I am having difficulties doing this when standing inside directory A in the example below.

$ pwd
/A
$ tree
.
├── 1.jpg
├── 2.jpg
└── 3.jpg

But it works fine when running rename from one step higher up in the folder hierarchy.

$ pwd
/
$ tree
.
└── A
    ├── 1.jpg
    ├── 2.jpg
    └── 3.jpg

$ rename 's|(.*)/(.*)|$1/Photos/$1 - $2|' */*.jpg -p
$ tree
.
└── A
    └── Photos
        ├── A\ -\ 1.jpg
        ├── A\ -\ 2.jpg
        └── A\ -\ 3.jpg

How can this be accomplished when standing in directory 'A' in the example?

Answer 1

OK that's a fancier rename than what I have, so first try using sed:

Dir=$(basename "$PWD")
mkdir -p Photos
ls *.jpg|sed 's|\(.*\)|mv "\1" "Photos/'"$Dir"' - \1"|'    |sh

which I guess translates to your rename like this:

Dir=$(basename "$PWD")
rename 's|(.*)|Photos/'"$Dir"' - $1|' *.jpg -p

Answer 2

Expanding upon AndreBeaud's answer. I also did some further experiments with the rename command. These four variants all work, it can probably be done even cleaner. I noticed that AndreBeaud didn't use eval, instead used single quotes to concatenate the strings. Handy.

1. Short but kind of difficult to read.

   rename 's|.*/(.*)/(.*)|Photos/$1 - $2|' `pwd`/*.jpg --make-dirs
   

2. Easier to read with the folder name in the substitute part.

   eval "rename 's|(.*)|Photos/$(basename `"pwd"`) - \$1|' *.jpg --make-dirs"
   

3. Create variable first. Not critical in this case, since it's only used once. Easy to follow.

   Dir=$(basename `"pwd"`); eval "rename 's|(.*)|Photos/$Dir - \$1|' *.jpg --make-dirs"
   

4. Variable first, but with the folder name in the find part, messy.

   Dir=$(basename `"pwd"`); rename 's|.*/(.*)/(.*)|Photos/$1 - $2|' ../$Dir/*.jpg --make-dirs
   

Combining both AndreBeaud's and my versions can make this short version:

rename 's|(.*)|Photos/'"$(basename "$PWD")"' - $1|' *.jpg --make-dirs