Standalone CLI programs for tools of https://texttoolkit.com :

• cdg.py: a compilation database generator for GNU make

And other text tools:

• column-join.py: join every line from a few files as columns

column-join.py

For example, there are three files:

$ cat c1.txt
1
2
3

$ cat c2.txt
a
b

$ cat c3.txt
x
y
z

Join them like this: python column-join joined.txt , c0.txt c1.txt c2.txt, then joined.txt will have:

$ cat joined.txt
1,a,x
2,b,z