Zig-vars: expand variables in strings

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https://codeberg.org/roble/zig-vars/

I searched the docs and online for 10 seconds and didn’t find a way to expand environment variables in a string… so I made my own library! :sweat_smile:

I wanted this functionality for some other project I’m working on, but I figured variable expansion would be pretty reusable in other projects too.

const expanded = try vars.expandEnv(init.gpa, init.environ_map, "Hello, ${HOME}!");
defer init.gpa.free(expanded);
std.debug.print("{s}\n", .{expanded});
// prints:
//   Hello, /home/me!

For my other project, I specifically wanted to do this. It’s just simple variable expansion. I don’t need anything fancy like detecting file paths and joining them. Just replace the var with the value.

const config_dir = try vars.expandEnv(init.gpa, init.environ_map, "$HOME/.config");
// -> /home/me/.config

Supported Zig versions

  • 0.16.0
  • 0.17.0-dev.1509+bb296ab9b
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