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build: use Child.exec in ZiglingStep.run

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Update the run method to use Child.exec, instead of Child.spawn followed
by Child.wait.
This simplifies the code.
This commit is contained in:
Manlio Perillo 2023-05-01 19:27:50 +02:00
parent 40cbee8fa2
commit 11d8468539
1 changed files with 18 additions and 31 deletions
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49
build.zig
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@ -272,44 +272,31 @@ const ZiglingStep = struct {
resetLine();
print("Checking {s}...\n", .{self.exercise.main_file});
const cwd = self.builder.build_root.path.?;
const argv = [_][]const u8{exe_path};
var child = std.ChildProcess.init(&argv, self.builder.allocator);
child.cwd = cwd;
child.env_map = self.builder.env_map;
child.stdin_behavior = .Inherit;
if (self.exercise.check_stdout) {
child.stdout_behavior = .Pipe;
child.stderr_behavior = .Inherit;
} else {
child.stdout_behavior = .Inherit;
child.stderr_behavior = .Pipe;
}
child.spawn() catch |err| {
print("{s}Unable to spawn {s}: {s}{s}\n", .{ red_text, argv[0], @errorName(err), reset_text });
return err;
};
const b = self.step.owner;
// Allow up to 1 MB of stdout capture.
const max_output_len = 1 * 1024 * 1024;
const output = if (self.exercise.check_stdout)
try child.stdout.?.reader().readAllAlloc(self.builder.allocator, max_output_len)
else
try child.stderr.?.reader().readAllAlloc(self.builder.allocator, max_output_len);
const max_output_bytes = 1 * 1024 * 1024;
// At this point stdout is closed, wait for the process to terminate.
const term = child.wait() catch |err| {
print("{s}Unable to spawn {s}: {s}{s}\n", .{ red_text, argv[0], @errorName(err), reset_text });
var result = Child.exec(.{
.allocator = b.allocator,
.argv = &.{exe_path},
.cwd = b.build_root.path.?,
.cwd_dir = b.build_root.handle,
.max_output_bytes = max_output_bytes,
}) catch |err| {
print("{s}Unable to spawn {s}: {s}{s}\n", .{
red_text, exe_path, @errorName(err), reset_text,
});
return err;
};
const output = if (self.exercise.check_stdout)
result.stdout
else
result.stderr;
// Make sure it exited cleanly.
switch (term) {
switch (result.term) {
.Exited => |code| {
if (code != 0) {
print("{s}{s} exited with error code {d} (expected {d}){s}\n", .{ red_text, self.exercise.main_file, code, 0, reset_text });