Load ENV vars from .env files on boot
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On boot, calling env.init(alloc, ".env") will return an env that
includes values from the .env file
Lines starting with # are treated as comments
All other lines will take the form
ENV_VAR_NAME=VALUE
Lines that do not have a = sign will be skipped
zig fetch --save git+https://github.com/zigster64/dotenv.zig#main
Then add to your build.zig
const dotenv = b.dependency("dotenv", .{ dependency options here );
exe.root_module.addImport("dotenv", dotenv.module("dotenv"));This is a MicroLibrary, the code is trivial enough
Consider just copypasting the file dotenv.zig into your project instead of adding yet another microdependency
Its only about 20 lines of code
Up to you
const dotenv = @import("dotenv");
pub fn main() !void {
// create an allocator
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
const allocator = gpa.allocator();
defer gpa.deinit();
// init the dotenv object - this will read the .env file at runtime
var env = try dotenv.init(allocator, ".env");
defer env.deinit();
// gen "Env" vars
var database_host = env.get("DATABASE_HOST") orelse "localhost";
var database_name = env.get("DATABASE_NAME") orelse "zigzag-data";
... do stuff
// change the value of the DATABASE_HOST
try env.put("DATABASE_HOST", "postgres.local");
}On boot, loads the .env file, and parses each line
If the line contains an '=' char, then it splits the line on that first '=' and then adds KEY : VALUE to the environment.
Uses std.process.EnvMap - which is an in-memory clone of the initial ENV