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changed compat check to comptime

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This commit is contained in:
Chris Boesch 2023-10-06 00:33:24 +02:00
parent 2ba613b14f
commit 3ab1942156
2 changed files with 30 additions and 70 deletions
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35
build.zig
View file

@ -1,17 +1,43 @@
const std = @import("std");
const builtin = @import("builtin");
const compat = @import("src/compat.zig");
const tests = @import("test/tests.zig");
const Build = compat.Build;
const CompileStep = compat.build.CompileStep;
const Step = compat.build.Step;
const Build = std.Build;
const CompileStep = Build.CompileStep;
const Step = Build.Step;
const Child = std.process.Child;
const assert = std.debug.assert;
const join = std.fs.path.join;
const print = std.debug.print;
// When changing this version, be sure to also update README.md in two places:
// 1) Getting Started
// 2) Version Changes
comptime {
const required_zig = "0.11.0-dev.4246";
const current_zig = builtin.zig_version;
const min_zig = std.SemanticVersion.parse(required_zig) catch unreachable;
if (current_zig.order(min_zig) == .lt) {
const error_message =
\\Sorry, it looks like your version of zig is too old. :-(
\\
\\Ziglings requires development build
\\
\\{}
\\
\\or higher.
\\
\\Please download a development ("master") build from
\\
\\https://ziglang.org/download/
\\
\\
;
@compileError(std.fmt.comptimePrint(error_message, .{min_zig}));
}
}
const Kind = enum {
/// Run the artifact as a normal executable.
exe,
@ -93,7 +119,6 @@ pub const logo =
;
pub fn build(b: *Build) !void {
if (!compat.is_compatible) compat.die();
if (!validate_exercises()) std.os.exit(2);
use_color_escapes = false;

65
src/compat.zig
View file

@ -1,65 +0,0 @@
/// Compatibility support for very old versions of Zig and recent versions before
/// commit efa25e7d5 (Merge pull request #14498 from ziglang/zig-build-api).
///
/// Versions of Zig from before 0.6.0 cannot do the version check and will just
/// fail to compile, but 0.5.0 was a long time ago, it is unlikely that anyone
/// who attempts these exercises is still using it.
const std = @import("std");
const builtin = @import("builtin");
const debug = std.debug;
// Very old versions of Zig used warn instead of print.
const print = if (@hasDecl(debug, "print")) debug.print else debug.warn;
// When changing this version, be sure to also update README.md in two places:
// 1) Getting Started
// 2) Version Changes
const needed_version_str = "0.11.0-dev.4246";
fn isCompatible() bool {
if (!@hasDecl(builtin, "zig_version") or !@hasDecl(std, "SemanticVersion")) {
return false;
}
const needed_version = std.SemanticVersion.parse(needed_version_str) catch unreachable;
const version = builtin.zig_version;
const order = version.order(needed_version);
return order != .lt;
}
pub fn die() noreturn {
const error_message =
\\ERROR: Sorry, it looks like your version of zig is too old. :-(
\\
\\Ziglings requires development build
\\
\\ {s}
\\
\\or higher. Please download a development ("master") build from
\\
\\ https://ziglang.org/download/
\\
\\
;
print(error_message, .{needed_version_str});
// Use exit code 2, to differentiate from a normal Zig compiler error.
std.os.exit(2);
}
// A separate function is required because very old versions of Zig doesn't
// support labeled block expressions.
pub const is_compatible: bool = isCompatible();
/// This is the type to be used only for the build function definition, since
/// the type must be compatible with the build runner.
///
/// Don't use std.Build.Builder, since it is deprecated and may be removed in
/// future.
pub const Build = if (is_compatible) std.Build else std.build.Builder;
/// This is the type to be used for accessing the build namespace.
pub const build = if (is_compatible) std.Build else std.build;