mod: bump zig version to 0.16

src/root.zig

@@ -1,11 +1,15 @@
 /// *zlog* defaultLog function replacement, which adjusts the surrounding contents of every `std.log` message.
 fn logFn(
     comptime message_level: log.Level,
-    comptime scope: @Type(.enum_literal),
+    comptime scope: @EnumLiteral(),
     comptime format: []const u8,
     args: anytype,
 ) void {
     var buf: [128]u8 = undefined;
+    const io = std.Options.debug_io;
+    const prev = io.swapCancelProtection(.blocked);
+    defer _ = io.swapCancelProtection(prev);
+
     if (comptime build_options.file.len > 0) {
         const prefix = if (scope == .default) " " else "(" ++ @tagName(scope) ++ ") ";
         const level_txt = switch (comptime message_level) {
@@ -25,12 +29,12 @@ fn logFn(
         }, 0o600) catch @panic("Could not append to log file");
         defer std.posix.close(fd);
 
-        var file: fs.File = .{ .handle = fd };
-        var buffer = file.writer(&buf);
+        var file: Io.File = .{ .handle = fd };
+        var buffer = file.writer(io, &buf);
         var writer = &buffer.interface;
         defer writer.flush() catch unreachable;
 
-        log_writing(writer, complete_format, false, args);
+        log_writing(io, writer, complete_format, false, args);
     }
 
     if (comptime build_options.stderr) {
@@ -43,20 +47,17 @@ fn logFn(
         };
         const complete_format = level_txt ++ prefix ++ format ++ "\n";
 
-        std.debug.lockStdErr();
-        defer std.debug.unlockStdErr();
-
-        var buffer = fs.File.stderr().writer(&buf);
+        var buffer = Io.File.stderr().writer(io, &buf);
         var writer = &buffer.interface;
         defer writer.flush() catch unreachable;
 
-        log_writing(writer, complete_format, true, args);
+        log_writing(io, writer, complete_format, true, args);
     }
 }
 
-inline fn log_writing(writer: *std.Io.Writer, comptime format: []const u8, comptime ansi: bool, args: anytype) void {
+inline fn log_writing(io: std.Io, writer: *std.Io.Writer, comptime format: []const u8, comptime ansi: bool, args: anytype) void {
     nosuspend {
-        if (build_options.timestamp) log_timestamp(writer, ansi);
+        if (build_options.timestamp) log_timestamp(io, writer, ansi);
         writer.print(format, args) catch return;
     }
 }
@@ -65,9 +66,10 @@ inline fn log_writing(writer: *std.Io.Writer, comptime format: []const u8, compt
 /// `<year>/<month>/<day> <hour>:<minute>:<sec> `
 ///
 /// NOTE all information are displayed using numbers
-inline fn log_timestamp(writer: anytype, comptime ansi: bool) void {
-    const time = std.posix.clock_gettime(.REALTIME) catch @panic("Cannot request timestamp");
-    const epoch_secs: std.time.epoch.EpochSeconds = .{ .secs = @intCast(time.sec) };
+/// NOTE the timestamp is printed in UTC time regardless of the machine's configuration
+inline fn log_timestamp(io: std.Io, writer: anytype, comptime ansi: bool) void {
+    const time_ms: u64 = @intCast(std.Io.Timestamp.now(io, .real).toMilliseconds());
+    const epoch_secs: std.time.epoch.EpochSeconds = .{ .secs = @intCast(time_ms / std.time.ms_per_s) };
     const day_secs = epoch_secs.getDaySeconds();
     const year_and_day = epoch_secs.getEpochDay().calculateYearDay();
     const month_and_day = year_and_day.calculateMonthDay();
@@ -222,7 +224,7 @@ pub const std_options: std.Options = .{
 };
 
 const std = @import("std");
-const fs = std.fs;
+const Io = std.Io;
 const log = std.log;
 const fmt = std.fmt;
 const build_options = @import("build_options");