solv-sh

Soulver-like calculator for the command line, intended for Vim.

Latest version: 1.2.0 (2024-11-30)

Usage:

./solv.sh "a simple sum 1 + 1
           let us multiply that result LINE:-1 * 3
           and sum the previous lines SUM:-2,-1
           as a percentage demo 2 - 1 as % of LINE:+2
           percent off demo (5 * 2) % off 512
           percent of demo 10 % of 256"

# Output
a simple sum 1 + 1                          #= 2
let us multiply that result LINE:-1 * 3     #= 6
and sum the previous lines SUM:-2,-1        #= 8
as a percentage demo 2 - 1 as % of LINE:+2  #= 3.90625
percent off demo (5 * 2) % off 512          #= 460.8
percent of demo 10 % of 256                 #= 25.6

You can pass solv-sh an input that includes previously generated answers and they will be stripped and recalculated.

You can pipe:

echo "1 + 1 - (2 * 2)
      LINE:-1 + 10
      LINE:-1 * 2
      SUM:-2,-1" | ./solv.sh

Supported syntax

solv-sh essentially tries to make its input bc friendly (which it uses internally) while adding support for the following tokens:

• LINE:relative-line-number
• SUM:start-of-range,end-of-range
• X as % of Y
• X % off Y
• X % of Y

Both LINE and SUM work with relative line numbers, so LINE:-1 means to replace that token with the calculated value of the line before it, and SUM:-2,-1 means to replace that token with the sum of the two previous lines.

X and Y correspond to any expression you can make with bc, plus the LINE and SUM tokens above.

Vim

As solv-sh works with relative line numbers it's especially handy to use within Vim: You can pipe a VISUAL selection of calculations to solv-sh by hitting ! on your keyboard and entering the path to the script.

Credits

• Soulver was written by these guys. You should buy their app.
• solv-sh was written by Conan Theobald.

I hope you found it useful! If so, I like coffee ☕️ :)