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I considered that just the other day. Ended up using cpp instead.

• imglorp 4y ago
  Another simple option is envsubst which does one thing well.
  • nick__m 4y ago
    I used envsubst when I can but as far as I know you cannot do loop using envsubst. When you use the c preprocessor or php, m4, etc..., you can.
    • imglorp 4y ago
      Nah, that's what I meant. It does $-expansion and that's it. If you need conditionals and loop you need templates and macros like others are saying: m4, cpp, handlebars, whatever. I use it as a low-brain template engine to do only that.
  • morelisp 4y ago
    I use envsubst a lot, but without - and + forms it's hard to say it does it well.