Over the decades I’ve seen the praise and critique of the “Unix way”. I don’t remember reading about the aspect I’ll describe below. This might be a banality, and I haven’t invested much thought into it either. I’m just curious to hear your opinions.
At the core of the Unix way is that tools should do just one thing. Users very often need results that can only be achieved after doing several things. With only single-purpose tools at hand, users have to integrate them. In other words, the tool authors delegate integration to the users.
Here’s the idea I want to discuss. In programming languages, integrating various modules to achieve a goal is already a complex task because we often have to handle numerous failure modes and edge cases. In shell scripts this is much worse, since shells are more limited than programming languages. Writing a tool that does only one thing looks like avoiding the most complicated task. Which leads to a conclusion that the Unix way only works well in a rather small fraction of use cases; the majority of cases are better served by different approaches.
What do you think?
I mean that’s basically the same thing, just a different user interface. I think from a technical perspective it doesn’t matter a lot whether we write down the commands as text/words and connect them with “|” symbols or whether we pick them from a long list of symbols and arrange them as puzzle pieces or connect them with pipes or arrows drawn with the mouse.
In my experience, programming languages offer more control than just connecting inputs and outputs, and it’s easier to get right
And generally should be more efficient too. Bash and this unix-style tool calling was not designed for efficiency. Which is fine for most use cases, but should be avoided for tools you regular use.
To be more detailed, every time you call a program using bash, your bash program has to fork into two identical processes. Then all that work of forking is wasting as one of the forks then execs to replace itself with the program you called. And that happens with each tool called.
Using other programs, like Python, can more efficiently exec other programs without the same overhead of forking. And for longer running jobs, Python is much more efficient as it converts itself to bytecode, whereas bash is purely interpreted.
The main downside of Python is its longer time to start. So for simpler jobs, bash can be better.