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ddc835762c
This is primarily to make users aware that there has been a change in the call for individual exercises.
65 lines
2.2 KiB
Zig
65 lines
2.2 KiB
Zig
/// Compatibility support for very old versions of Zig and recent versions before
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/// commit efa25e7d5 (Merge pull request #14498 from ziglang/zig-build-api).
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///
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/// Versions of Zig from before 0.6.0 cannot do the version check and will just
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/// fail to compile, but 0.5.0 was a long time ago, it is unlikely that anyone
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/// who attempts these exercises is still using it.
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const std = @import("std");
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const builtin = @import("builtin");
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const debug = std.debug;
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// Very old versions of Zig used warn instead of print.
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const print = if (@hasDecl(debug, "print")) debug.print else debug.warn;
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// When changing this version, be sure to also update README.md in two places:
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// 1) Getting Started
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// 2) Version Changes
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const needed_version_str = "0.11.0-dev.2401";
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fn isCompatible() bool {
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if (!@hasDecl(builtin, "zig_version") or !@hasDecl(std, "SemanticVersion")) {
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return false;
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}
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const needed_version = std.SemanticVersion.parse(needed_version_str) catch unreachable;
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const version = builtin.zig_version;
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const order = version.order(needed_version);
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return order != .lt;
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}
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pub fn die() noreturn {
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const error_message =
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\\ERROR: Sorry, it looks like your version of zig is too old. :-(
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\\
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\\Ziglings requires development build
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\\
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\\ {s}
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\\
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\\or higher. Please download a development ("master") build from
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\\
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\\ https://ziglang.org/download/
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\\
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\\
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;
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print(error_message, .{needed_version_str});
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// Use exit code 2, to differentiate from a normal Zig compiler error.
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std.os.exit(2);
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}
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// A separate function is required because very old versions of Zig doesn't
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// support labeled block expressions.
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pub const is_compatible: bool = isCompatible();
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/// This is the type to be used only for the build function definition, since
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/// the type must be compatible with the build runner.
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///
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/// Don't use std.Build.Builder, since it is deprecated and may be removed in
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/// future.
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pub const Build = if (is_compatible) std.Build else std.build.Builder;
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/// This is the type to be used for accessing the build namespace.
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pub const build = if (is_compatible) std.Build else std.build;
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