1 files changed, 70 insertions, 0 deletions

diff --git a/build.zig b/build.zig
new file mode 100644
index 0000000..caf84f5
--- /dev/null
+++ b/build.zig
@@ -0,0 +1,70 @@
+const std = @import("std");
+
+const Build = std.Build;
+const SemanticVersion = std.SemanticVersion;
+
+pub fn build(b: *Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const sqlite = b.dependency("sqlite", .{
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const version = getVersion(b);
+
+    const config = b.addOptions();
+    config.addOption(SemanticVersion, "version", version);
+
+    const exe = b.addExecutable(.{
+        .name = "ukkobot",
+        .version = version,
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+    exe.root_module.addOptions("ukkobot-config", config);
+    exe.root_module.addImport("sqlite", sqlite.module("sqlite"));
+    exe.linkLibrary(sqlite.artifact("sqlite"));
+    b.installArtifact(exe);
+
+    const run_cmd = b.addRunArtifact(exe);
+    run_cmd.step.dependOn(b.getInstallStep());
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+}
+
+const default_version = SemanticVersion.parse("0.0.1") catch unreachable;
+
+fn getVersion(b: *Build) SemanticVersion {
+    var out_code: u8 = undefined;
+    const untrimmed = b.runAllowFail(
+        &.{ "git", "-C", b.build_root.path.?, "describe", "--tags" },
+        &out_code,
+        .Ignore,
+    ) catch return default_version;
+
+    const git_desc = std.mem.trim(u8, untrimmed, &std.ascii.whitespace);
+    // Turn something like 0.0.1-1-g85f815d into 0.0.1-1+g85f815d
+    const ver_str = switch (std.mem.count(u8, git_desc, "-")) {
+        0 => git_desc,
+        2 => blk: {
+            var it = std.mem.splitScalar(u8, git_desc, '-');
+            const tag = it.next() orelse unreachable;
+            const height = it.next() orelse unreachable;
+            const hash = it.next() orelse unreachable;
+            break :blk b.fmt("{s}-{s}+{s}", .{ tag, height, hash });
+        },
+        else => {
+            std.log.err("Unexpected `git describe` output: {s}", .{git_desc});
+            return default_version;
+        },
+    };
+
+    return SemanticVersion.parse(ver_str) catch default_version;
+}