This is part two of a series on how to approach bash programming in a way that’s safer and more structured than your basic script.
See part 1 if you want to catch the series from the start.
Before getting into coding, I want to recommend a good editor. A developer’s choice of an editor is like a chef’s choice of knives; a wise choice will serve a lifetime and make difficult tasks seem effortless. Vim is one such wise choice for slicing, dicing and julienning code.
That’s not to say there aren’t other good editors out there. For lightweight, functional text editors, I can recommend some good ones:
Linux - Geany
Windows - Programmer’s Notepad
Mac - Sorry, there aren’t any great lightweight, free Mac editors of which I’m aware - try Atom for two out of three
Vigor and Vim
Ok, so you’re sold on vim already. Vim works great for bash scripting out-of-the-box. So what more is there to say?
See my vim configuration repository for full details, but here are a couple tips (and a tip of the cap to mutewinter’s Vim Configuration of Champions, from which most of these come):
a plugin manager - vim-plug is a lightweight one
sensible defaults - everyone should start with vim-sensible
auto-delimiters - having matching parentheses, braces and quotes auto-added can be really nice. Try delimitMate.
auto statement endings - like the above, but automatically puts in the closing word (e.g. done or fi) for constructs such as for and if with vim-endwise
comments - comment and uncomment several lines at a stroke with tcomment
tab completion - the simplest is VimCompletesMe
indent guides - ‘nuf said - vim-indent-guides
Once you’re into the advanced stuff:
pair-wise manipulation of delimiters - vim-surround takes the tedium out of editing pairs of delimiters, especially for a language as quotation-heavy as bash is
exuberant ctags - if you like to find function definitions easily across multiple files, then vim-easytags is your friend
Color by Numbers
Line numbers. Use them. Navigate vertically with <line number>G and reorient the page with z<Enter>.
Put It On My Tab
Use smart tabs for two-space indentation.
To indent and de-indent a single line or selected blocks of code, use
The Show Must Go On
Show matching delimiters and special whitespace.
When I Say “Shell”, You Say “Bash”
Hint to vim that when you say shell, you mean bash syntax.
Continue with part 3 - the start.