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std.Build: add dependencyFromBuildZig

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Carl Åstholm 2024-02-13 00:02:52 +01:00 committed by Andrew Kelley
parent e204a6edb8
commit 05126fc4c5
1 changed files with 26 additions and 0 deletions
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26
lib/std/Build.zig
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@ -1947,6 +1947,32 @@ pub inline fn lazyImport(
comptime unreachable; // Bad @dependencies source
}
pub fn dependencyFromBuildZig(
b: *Build,
/// The build.zig struct of the dependency, normally obtained by `@import` of the dependency.
/// If called from the build.zig file itself, use `@This` to obtain a reference to the struct.
comptime build_zig: type,
args: anytype,
) *Dependency {
const build_runner = @import("root");
const deps = build_runner.dependencies;
find_dep: {
const pkg, const pkg_hash = inline for (@typeInfo(deps.packages).Struct.decls) |decl| {
const pkg_hash = decl.name;
const pkg = @field(deps.packages, pkg_hash);
if (@hasDecl(pkg, "build_zig") and pkg.build_zig == build_zig) break .{ pkg, pkg_hash };
} else break :find_dep;
const dep_name = for (b.available_deps) |dep| {
if (mem.eql(u8, dep[1], pkg_hash)) break dep[1];
} else break :find_dep;
return dependencyInner(b, dep_name, pkg.build_root, pkg.build_zig, pkg.deps, args);
}
const full_path = b.pathFromRoot("build.zig.zon");
debug.panic("'{}' is not a build.zig struct of a dependecy in '{s}'", .{ build_zig, full_path });
}
pub fn anonymousDependency(
b: *Build,
/// The path to the directory containing the dependency's build.zig file,