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glfw: add SDK_PATH for easier testing of changes to SDKs (#6)

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This change makes it easier to test SDKs locally, e.g. if you have:

```
% tree projects/
projects
├── mach
│   └── glfw
└── sdk-macos-11.3
```

In the `projects/mach/glfw` directory it is now easy to test changes to `sdk-macos-11.3` using:

```sh
SDK_PATH="$(pwd)/../.." zig build test -Dtarget=aarch64-macos
```

And it'll use your local SDK, instead of the one in the appdata dir.

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2021-07-24 13:38:43 -07:00 • committed by GitHub
parent d1591f6b46
commit f9e098c442
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1 changed files with 19 additions and 2 deletions
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21
glfw/build.zig
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@ -218,8 +218,25 @@ fn includeSdkMacOS(b: *Builder, step: *std.build.LibExeObjStep) void {
/// Caller owns returned memory.
fn getSdkRoot(allocator: *std.mem.Allocator, comptime name: []const u8) ![]const u8 {
const app_data_dir = try std.fs.getAppDataDir(allocator, "mach");
var sdk_root_dir = try std.fs.path.join(allocator, &.{ app_data_dir, name });
// Find the directory where the SDK should be located. We'll consider two locations:
//
// 1. $SDK_PATH/<name> (if set, e.g. for testing changes to SDKs easily)
// 2. <appdata>/<name> (default)
//
// Where `<name>` is the name of the SDK, e.g. `sdk-macos-11.3`.
var sdk_root_dir: []const u8 = if (std.process.getEnvVarOwned(allocator, "SDK_PATH")) |sdk_path| {
defer allocator.free(sdk_path);
return try std.fs.path.join(allocator, &.{ sdk_path, name });
} else |err| switch (err) {
error.EnvironmentVariableNotFound => {
const app_data_dir = try std.fs.getAppDataDir(allocator, "mach");
defer allocator.free(app_data_dir);
return try std.fs.path.join(allocator, &.{ app_data_dir, name });
},
else => |e| return e,
};
// If the SDK exists, return it. Otherwise, clone it.
if (std.fs.openDirAbsolute(sdk_root_dir, .{})) {
return sdk_root_dir;
} else |err| return switch (err) {