Substitutes the values of environment variables, but with handlebars.
Basically the idea of hbsenvsubst is to work similar to envsubst, but instead of using
shell format, it uses handlebars.
Please be aware that at this time, hbsenvsubst should be considered a prototype that was quickly
rushed to play with this idea, so your mileage may vary.
hbsenvsubst < some-file-in > some-file-outAn example handlebars input like this:
#!/bin/bash
echo "hello {{env.USER}}"should yield hello foo, given that the USER environment variable is "foo".
There are currently three objects accessible in handlebars:
env- environment variablesmem-
free- free system memory
-
total- total system memory
-
used- used system memory
cpu-
logical- number of logical cpus
-
physical- number of physical cpus
In addition to this, there are some additional helpers:
add- add-
{{add 2 2}}yields4
div- divide-
{{div 4 2}}yields2
mod- modulo-
{{mod 4 3}}yields1
mul- multiply-
{{mul 3 3}}yields9
sub- subtract-
{{sub 8 5}}yields3
The rust-handlebars crate also includes some built-in helpers:
ifunlesslogeachwitheqnegtgteltlteandornot
MIT License