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Merge pull request #300 from perillo/simplify-build

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Simplify build.zig
This commit is contained in:
Chris Boesch 2023-05-14 18:06:14 +02:00 committed by GitHub
commit 4c6b6b94e4
2 changed files with 150 additions and 307 deletions
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162
build.zig
View file

@ -64,18 +64,14 @@ pub const Exercise = struct {
pub fn number(self: Exercise) usize {
return std.fmt.parseInt(usize, self.key(), 10) catch unreachable;
}
};
/// Returns the CompileStep for this exercise.
pub fn addExecutable(self: Exercise, b: *Build, work_path: []const u8) *CompileStep {
const path = join(b.allocator, &.{ work_path, self.main_file }) catch
@panic("OOM");
return b.addExecutable(.{
.name = self.name(),
.root_source_file = .{ .path = path },
.link_libc = self.link_libc,
});
}
/// Build mode.
const Mode = enum {
/// Normal build mode: `zig build`
normal,
/// Named build mode: `zig build -Dn=n`
named,
};
pub const logo =
@ -123,6 +119,9 @@ pub fn build(b: *Build) !void {
reset_text = "\x1b[0m";
}
// Remove the standard install and uninstall steps.
b.top_level_steps = .{};
const healed = b.option(bool, "healed", "Run exercises from patches/healed") orelse
false;
const override_healed_path = b.option([]const u8, "healed-path", "Override healed path");
@ -137,101 +136,37 @@ pub fn build(b: *Build) !void {
const header_step = PrintStep.create(b, logo);
// If the user pass a number for an exercise
if (exno) |n| {
// Named build mode: verifies a single exercise.
if (n == 0 or n > exercises.len - 1) {
print("unknown exercise number: {}\n", .{n});
std.os.exit(2);
}
const ex = exercises[n - 1];
const build_step = ex.addExecutable(b, work_path);
const skip_step = SkipStep.create(b, ex);
if (!ex.skip)
b.installArtifact(build_step)
else
b.getInstallStep().dependOn(&skip_step.step);
const run_step = b.addRunArtifact(build_step);
const test_step = b.step(
"test",
b.fmt("Run {s} without checking output", .{ex.main_file}),
);
if (ex.skip) {
test_step.dependOn(&skip_step.step);
} else {
test_step.dependOn(&run_step.step);
}
const verify_step = ZiglingStep.create(b, ex, work_path);
const zigling_step = b.step(
"zigling",
b.fmt("Check the solution of {s}", .{ex.main_file}),
);
zigling_step.dependOn(&verify_step.step);
b.default_step = zigling_step;
zigling_step.dependOn(&header_step.step);
const start_step = b.step(
"start",
b.fmt("Check all solutions starting at {s}", .{ex.main_file}),
);
const verify_step = ZiglingStep.create(b, ex, work_path, .named);
verify_step.step.dependOn(&header_step.step);
var prev_step = verify_step;
for (exercises) |exn| {
const nth = exn.number();
if (nth > n) {
const verify_stepn = ZiglingStep.create(b, exn, work_path);
verify_stepn.step.dependOn(&prev_step.step);
prev_step = verify_stepn;
}
}
start_step.dependOn(&prev_step.step);
return;
} else if (healed and false) {
// Special case when healed by the eowyn script, where we can make the
// code more efficient.
//
// TODO: this branch is disabled because it prevents the normal case to
// be executed.
const test_step = b.step("test", "Test the healed exercises");
b.default_step = test_step;
for (exercises) |ex| {
const build_step = ex.addExecutable(b, healed_path);
b.installArtifact(build_step);
const run_step = b.addRunArtifact(build_step);
if (ex.skip) {
const skip_step = SkipStep.create(b, ex);
test_step.dependOn(&skip_step.step);
} else {
test_step.dependOn(&run_step.step);
}
}
zigling_step.dependOn(&verify_step.step);
return;
}
// Run all exercises in a row
// Normal build mode: verifies all exercises according to the recommended
// order.
const ziglings_step = b.step("ziglings", "Check all ziglings");
b.default_step = ziglings_step;
var prev_step = &header_step.step;
for (exercises) |ex| {
const build_step = ex.addExecutable(b, work_path);
const skip_step = SkipStep.create(b, ex);
if (!ex.skip)
b.installArtifact(build_step)
else
b.getInstallStep().dependOn(&skip_step.step);
const verify_stepn = ZiglingStep.create(b, ex, work_path);
const verify_stepn = ZiglingStep.create(b, ex, work_path, .normal);
verify_stepn.step.dependOn(prev_step);
prev_step = &verify_stepn.step;
@ -252,12 +187,18 @@ const ZiglingStep = struct {
step: Step,
exercise: Exercise,
work_path: []const u8,
mode: Mode,
is_testing: bool = false,
result_messages: []const u8 = "",
result_error_bundle: std.zig.ErrorBundle = std.zig.ErrorBundle.empty,
pub fn create(b: *Build, exercise: Exercise, work_path: []const u8) *ZiglingStep {
pub fn create(
b: *Build,
exercise: Exercise,
work_path: []const u8,
mode: Mode,
) *ZiglingStep {
const self = b.allocator.create(ZiglingStep) catch @panic("OOM");
self.* = .{
.step = Step.init(.{
@ -268,6 +209,7 @@ const ZiglingStep = struct {
}),
.exercise = exercise,
.work_path = work_path,
.mode = mode,
};
return self;
}
@ -608,23 +550,18 @@ const ZiglingStep = struct {
}
fn help(self: *ZiglingStep) void {
const b = self.step.owner;
const key = self.exercise.key();
const path = self.exercise.main_file;
print("\n{s}Edit exercises/{s} and run 'zig build' again.{s}\n", .{
red_text, path, reset_text,
});
const cmd = switch (self.mode) {
.normal => "zig build",
.named => b.fmt("zig build -Dn={s}", .{key}),
};
// NOTE: The README explains this "advanced feature" if anyone wishes to use
// it. Otherwise, beginners are thinking they *have* to do this.
//const key = self.exercise.key();
//const format =
// \\
// \\{s}To compile only this exercise, you can also use this command:{s}
// \\{s}zig build -Dn={s}{s}
// \\
// \\
//;
//print(format, .{ red_text, reset_text, bold_text, key, reset_text });
print("\n{s}Edit exercises/{s} and run '{s}' again.{s}\n", .{
red_text, path, cmd, reset_text,
});
}
fn printErrors(self: *ZiglingStep) void {
@ -704,35 +641,6 @@ const PrintStep = struct {
}
};
/// Skips an exercise.
const SkipStep = struct {
step: Step,
exercise: Exercise,
pub fn create(owner: *Build, exercise: Exercise) *SkipStep {
const self = owner.allocator.create(SkipStep) catch @panic("OOM");
self.* = .{
.step = Step.init(.{
.id = .custom,
.name = owner.fmt("skip {s}", .{exercise.main_file}),
.owner = owner,
.makeFn = make,
}),
.exercise = exercise,
};
return self;
}
fn make(step: *Step, _: *std.Progress.Node) !void {
const self = @fieldParentPtr(SkipStep, "step", step);
if (self.exercise.skip) {
print("{s} skipped\n", .{self.exercise.main_file});
}
}
};
/// Checks that each exercise number, excluding the last, forms the sequence
/// `[1, exercise.len)`.
///

165
test/tests.zig
View file

@ -20,7 +20,7 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
const step = b.step("test-cli", "Test the command line interface");
{
// Test that `zig build -Dhealed -Dn=n test` selects the nth exercise.
// Test that `zig build -Dhealed -Dn=n` selects the nth exercise.
const case_step = createCase(b, "case-1");
const tmp_path = makeTempPath(b) catch |err| {
@ -31,7 +31,6 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
for (exercises[0 .. exercises.len - 1]) |ex| {
const n = ex.number();
if (ex.skip) continue;
const cmd = b.addSystemCommand(&.{
b.zig_exe,
@ -39,18 +38,13 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
"-Dhealed",
b.fmt("-Dhealed-path={s}", .{tmp_path}),
b.fmt("-Dn={}", .{n}),
"test",
});
cmd.setName(b.fmt("zig build -Dhealed -Dn={} test", .{n}));
cmd.setName(b.fmt("zig build -Dhealed -Dn={}", .{n}));
cmd.expectExitCode(0);
cmd.step.dependOn(&heal_step.step);
const output = if (ex.check_stdout)
cmd.captureStdOut()
else
cmd.captureStdErr();
const verify = CheckNamedStep.create(b, ex, output);
const stderr = cmd.captureStdErr();
const verify = CheckNamedStep.create(b, ex, stderr);
verify.step.dependOn(&cmd.step);
case_step.dependOn(&verify.step);
@ -63,52 +57,13 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
}
{
// Test that `zig build -Dhealed -Dn=n test` skips disabled esercises.
// Test that `zig build -Dhealed` processes all the exercises in order.
const case_step = createCase(b, "case-2");
const tmp_path = makeTempPath(b) catch |err| {
return fail(step, "unable to make tmp path: {s}\n", .{@errorName(err)});
};
const heal_step = HealStep.create(b, exercises, tmp_path);
for (exercises[0 .. exercises.len - 1]) |ex| {
const n = ex.number();
if (!ex.skip) continue;
const cmd = b.addSystemCommand(&.{
b.zig_exe,
"build",
"-Dhealed",
b.fmt("-Dhealed-path={s}", .{tmp_path}),
b.fmt("-Dn={}", .{n}),
"test",
});
const expect = b.fmt("{s} skipped", .{ex.main_file});
cmd.setName(b.fmt("zig build -Dhealed -Dn={} test", .{n}));
cmd.expectExitCode(0);
cmd.addCheck(.{ .expect_stdout_exact = "" });
cmd.addCheck(.{ .expect_stderr_match = expect });
cmd.step.dependOn(&heal_step.step);
case_step.dependOn(&cmd.step);
}
const cleanup = b.addRemoveDirTree(tmp_path);
cleanup.step.dependOn(case_step);
step.dependOn(&cleanup.step);
}
{
// Test that `zig build -Dhealed` process all the exercises in order.
const case_step = createCase(b, "case-3");
const tmp_path = makeTempPath(b) catch |err| {
return fail(step, "unable to make tmp path: {s}\n", .{@errorName(err)});
};
const heal_step = HealStep.create(b, exercises, tmp_path);
heal_step.step.dependOn(case_step);
@ -124,7 +79,7 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
cmd.step.dependOn(&heal_step.step);
const stderr = cmd.captureStdErr();
const verify = CheckStep.create(b, exercises, stderr, true);
const verify = CheckStep.create(b, exercises, stderr);
verify.step.dependOn(&cmd.step);
const cleanup = b.addRemoveDirTree(tmp_path);
@ -134,53 +89,29 @@ pub fn addCliTests(b: *std.Build, exercises: []const Exercise) *Step {
}
{
// Test that `zig build -Dhealed -Dn=1 start` process all the exercises
// in order.
const case_step = createCase(b, "case-4");
// Test that `zig build -Dn=n` prints the hint.
const case_step = createCase(b, "case-3");
const tmp_path = makeTempPath(b) catch |err| {
return fail(step, "unable to make tmp path: {s}\n", .{@errorName(err)});
};
for (exercises[0 .. exercises.len - 1]) |ex| {
if (ex.skip) continue;
const heal_step = HealStep.create(b, exercises, tmp_path);
heal_step.step.dependOn(case_step);
if (ex.hint) |hint| {
const n = ex.number();
// TODO: when an exercise is modified, the cache is not invalidated.
const cmd = b.addSystemCommand(&.{
b.zig_exe,
"build",
"-Dhealed",
b.fmt("-Dhealed-path={s}", .{tmp_path}),
"-Dn=1",
"start",
b.fmt("-Dn={}", .{n}),
});
cmd.setName("zig build -Dhealed -Dn=1 start");
cmd.expectExitCode(0);
cmd.step.dependOn(&heal_step.step);
cmd.setName(b.fmt("zig build -Dn={}", .{n}));
cmd.expectExitCode(2);
cmd.addCheck(.{ .expect_stderr_match = hint });
const stderr = cmd.captureStdErr();
const verify = CheckStep.create(b, exercises, stderr, false);
verify.step.dependOn(&cmd.step);
const cleanup = b.addRemoveDirTree(tmp_path);
cleanup.step.dependOn(&verify.step);
step.dependOn(&cleanup.step);
case_step.dependOn(&cmd.step);
}
}
{
// Test that `zig build -Dn=1` prints the hint.
const case_step = createCase(b, "case-5");
const cmd = b.addSystemCommand(&.{ b.zig_exe, "build", "-Dn=1" });
const expect = exercises[0].hint orelse "";
cmd.setName("zig build -Dn=1");
cmd.expectExitCode(2);
cmd.addCheck(.{ .expect_stderr_match = expect });
cmd.step.dependOn(case_step);
step.dependOn(&cmd.step);
step.dependOn(case_step);
}
return step;
@ -197,13 +128,13 @@ fn createCase(b: *Build, name: []const u8) *Step {
return case_step;
}
/// Checks the output of `zig build -Dn=n test`.
/// Checks the output of `zig build -Dn=n`.
const CheckNamedStep = struct {
step: Step,
exercise: Exercise,
output: FileSource,
stderr: FileSource,
pub fn create(owner: *Build, exercise: Exercise, output: FileSource) *CheckNamedStep {
pub fn create(owner: *Build, exercise: Exercise, stderr: FileSource) *CheckNamedStep {
const self = owner.allocator.create(CheckNamedStep) catch @panic("OOM");
self.* = .{
.step = Step.init(.{
@ -213,7 +144,7 @@ const CheckNamedStep = struct {
.makeFn = make,
}),
.exercise = exercise,
.output = output,
.stderr = stderr,
};
return self;
@ -222,34 +153,39 @@ const CheckNamedStep = struct {
fn make(step: *Step, _: *std.Progress.Node) !void {
const b = step.owner;
const self = @fieldParentPtr(CheckNamedStep, "step", step);
const ex = self.exercise;
// Allow up to 1 MB of output capture.
const max_bytes = 1 * 1024 * 1024;
const path = self.output.getPath(b);
const raw_output = try fs.cwd().readFileAlloc(b.allocator, path, max_bytes);
const stderr_file = try fs.cwd().openFile(
self.stderr.getPath(b),
.{ .mode = .read_only },
);
defer stderr_file.close();
const actual = try root.trimLines(b.allocator, raw_output);
const expect = self.exercise.output;
if (!mem.eql(u8, expect, actual)) {
return step.fail("{s}: expected to see \"{s}\", found \"{s}\"", .{
self.exercise.main_file, expect, actual,
});
const stderr = stderr_file.reader();
{
// Skip the logo.
const nlines = mem.count(u8, root.logo, "\n");
var buf: [80]u8 = undefined;
var lineno: usize = 0;
while (lineno < nlines) : (lineno += 1) {
_ = try readLine(stderr, &buf);
}
}
try check_output(step, ex, stderr);
}
};
/// Checks the output of `zig build` or `zig build -Dn=1 start`.
/// Checks the output of `zig build`.
const CheckStep = struct {
step: Step,
exercises: []const Exercise,
stderr: FileSource,
has_logo: bool,
pub fn create(
owner: *Build,
exercises: []const Exercise,
stderr: FileSource,
has_logo: bool,
) *CheckStep {
const self = owner.allocator.create(CheckStep) catch @panic("OOM");
self.* = .{
@ -261,7 +197,6 @@ const CheckStep = struct {
}),
.exercises = exercises,
.stderr = stderr,
.has_logo = has_logo,
};
return self;
@ -280,7 +215,7 @@ const CheckStep = struct {
const stderr = stderr_file.reader();
for (exercises) |ex| {
if (ex.number() == 1 and self.has_logo) {
if (ex.number() == 1) {
// Skip the logo.
const nlines = mem.count(u8, root.logo, "\n");
var buf: [80]u8 = undefined;
@ -293,8 +228,9 @@ const CheckStep = struct {
try check_output(step, ex, stderr);
}
}
};
fn check_output(step: *Step, exercise: Exercise, reader: Reader) !void {
fn check_output(step: *Step, exercise: Exercise, reader: Reader) !void {
const b = step.owner;
var buf: [1024]u8 = undefined;
@ -337,14 +273,14 @@ const CheckStep = struct {
while (lineno < nlines) : (lineno += 1) {
_ = try readLine(reader, &buf) orelse @panic("EOF");
}
}
}
fn check(
fn check(
step: *Step,
exercise: Exercise,
expect: []const u8,
actual: []const u8,
) !void {
) !void {
if (!mem.eql(u8, expect, actual)) {
return step.fail("{s}: expected to see \"{s}\", found \"{s}\"", .{
exercise.main_file,
@ -352,16 +288,15 @@ const CheckStep = struct {
actual,
});
}
}
}
fn readLine(reader: fs.File.Reader, buf: []u8) !?[]const u8 {
fn readLine(reader: fs.File.Reader, buf: []u8) !?[]const u8 {
if (try reader.readUntilDelimiterOrEof(buf, '\n')) |line| {
return mem.trimRight(u8, line, " \r\n");
}
return null;
}
};
}
/// Fails with a custom error message.
const FailStep = struct {