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{gpu-dawn,docs}: add MACH_GITHUB_BASE_URL for using GitHub mirror sites

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Users in the Chinese mainland find download speeds are too slow and need
an option to use GitHub download mirroring sites like fastgit.org, this
makes it possible to configure that using an environment variable.

See the documentation for more details.

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-09-17 08:49:24 -07:00
parent f1c74aabe2
commit 5e8ab95a74
2 changed files with 25 additions and 1 deletions
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14
libs/gpu-dawn/sdk.zig
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@ -169,6 +169,15 @@ pub fn Sdk(comptime deps: anytype) type {
}
}
fn getGitHubBaseURLOwned(allocator: std.mem.Allocator) []const u8 {
if (std.process.getEnvVarOwned(allocator, "MACH_GITHUB_BASE_URL")) |base_url| {
std.log.info("mach: respecting MACH_GITHUB_BASE_URL: {s}\n", .{base_url});
return base_url;
} else |_| {
return "https://github.com";
}
}
pub fn linkFromBinary(b: *Builder, step: *std.build.LibExeObjStep, options: Options) void {
const target = step.target_info.target;
const binaries_available = switch (target.os.tag) {
@ -321,11 +330,14 @@ pub fn Sdk(comptime deps: anytype) type {
// Compose the download URL, e.g.:
// https://github.com/hexops/mach-gpu-dawn/releases/download/release-6b59025/libdawn_x86_64-macos-none_debug.a.gz
const github_base_url = getGitHubBaseURLOwned(allocator);
defer allocator.free(github_base_url);
const lib_prefix = if (is_windows) "dawn_" else "libdawn_";
const lib_ext = if (is_windows) ".lib" else ".a";
const lib_file_name = if (is_windows) "dawn.lib" else "libdawn.a";
const download_url = try std.mem.concat(allocator, u8, &.{
"https://github.com/hexops/mach-gpu-dawn/releases/download/",
github_base_url,
"/hexops/mach-gpu-dawn/releases/download/",
version,
"/",
lib_prefix,