Create symbolic links transforming file names - Bash Script - linux

Question

I have a bash script that will loop through a directory getting each file name. What I would like to do is create a few symbolic links for these files. Except I want to change the link names.
Example 1:
File Name: testFile.so.3.4.5
ln -s testFile.so.3.4.5 testFile.so.3
ln -s testFile.so.3 testFile.so
Example 2:
File Name: testLink.so.4.4
ln -s testLink.so.4.4 testLink.so.4
ln -s testLink.so.4 testLink.so
So I need to transform the file name twice. The first time removing everything except the first number after *.so. The second time removing everything after *.so.
This is what I have so far. I know it's not much:
#! /bin/bash
# clear any info on screen
clear
# greeting
echo "Starting the script!"
# loop through all files in the directory
for f in *
do
echo "Processing: $f"
done
I'm a bit new to bash and file name transformations, so any help or guidance would be appreciated.

Answer 1

Using a combination of bash extended regular expressions and parameter expansion
for file in *.so.*
do
regex='(.*\.so\.[^.]*)\..*'
if [[ $file =~ $regex ]]
then
tempfile="${BASH_REMATCH[1]}"
ln -s "$file" "$tempfile"
ln -s "$tempfile" "${tempfile%.*}"
fi
done

Answer 2

Also more generally, using only parameter expansion:
for f in *.so.*.*
do
if [ -e "$f" ]; then
base=${f%".${f#*.so.*.*}"}
ln -s "$f" "$base"
ln -s "$base" "${base%.*}"
fi
done

Answer 3

or more generally:
files='libfoo.so.1.2.3.4.5 libbar.so libqux.so.1'
for f in $files; do
while test ${f##*.} != so; do
link=${f%.*}
ln -s $f $link
f=$link
done
done
this will create libfoo.so.1.2.3.4 -> libfoo.so.1.2.3.4.5, libfoo.so.1.2.3 -> libfoo.so.1.2.3.4, libfoo.so.1.2 -> libfoo.so.1.2.3, libfoo.so.1 -> libfoo.so.1.2, libfoo.so -> libfoo.so.1, and libqux.so -> libqux.so.1; libbar.so will be ignored.