84 lines
2.1 KiB
Markdown
84 lines
2.1 KiB
Markdown
+++
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date = "2022-08-03"
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tags = ["zig"]
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title = "zigでcliを作る"
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slug = "zig-cli"
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+++
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zigは、現時点で外部パッケージを読み込む機能がありません。rustならCargo.toml、rubyならGemfile、goならgo.modがあります。
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zigには、いくつか有志が仕組みを作っていますが、決定的なものは存在しません。
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- https://github.com/mattnite/gyro
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- https://github.com/marler8997/zig-build-repos
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したがって、build.zigにpathを書いていく必要があります。今回は、cli-toolを作ってみます。
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```zig:build.zig
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const std = @import("std");
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pub fn build(b: *std.build.Builder) void {
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const mode = b.standardReleaseOptions();
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const lib = b.addStaticLibrary("zig-cli", "zig-cli/src/main.zig");
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lib.setBuildMode(mode);
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lib.install();
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const main_tests = b.addTest("zig-cli/src/tests.zig");
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main_tests.setBuildMode(mode);
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const test_step = b.step("test", "Run library tests");
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test_step.dependOn(&main_tests.step);
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const origin = b.addExecutable("random", "example/random.zig");
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origin.addPackagePath("zig-cli", "zig-cli/src/main.zig");
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origin.setBuildMode(mode);
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origin.install();
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b.default_step.dependOn(&origin.step);
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}
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```
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https://github.com/sam701/zig-cli
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```sh
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$ git clone https://github.com/sam701/zig-cli
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$ mkdir -p example
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$ vim example/random.zig
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```
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```zig:example/random.zig
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const std = @import("std");
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const cli = @import("zig-cli");
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const RndGen = std.rand.DefaultPrng;
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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const allocator = gpa.allocator();
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var app = &cli.Command{
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.name = "random",
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.help = "get random number",
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.action = run_server,
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};
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pub fn main() !void {
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return cli.run(app, allocator);
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}
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fn run_server(_: []const []const u8) !void {
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var rnd = RndGen.init(0);
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var some_random_num = rnd.random().int(i32);
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std.log.debug("{d}", .{some_random_num});
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}
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```
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```sh
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$ zig build
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$ ./zig-out/bin/random
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```
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ref : https://www.reddit.com/r/Zig/comments/wc5rcb/hows_the_current_story_with_zig_in_terms_of/
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ref : https://www.reddit.com/r/Zig/comments/wcvksf/what_is_missing_in_the_zig_ecosystem/
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