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ziglings/build.zig
Dave Gauer 110e556ae1 add ex088 async 5 await
2021-05-13 19:48:10 -04:00

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const std = @import("std");
const Builder = std.build.Builder;
const Step = std.build.Step;
const assert = std.debug.assert;
const print = std.debug.print;
// When changing this version, be sure to also update README.md in two places:
// 1) Getting Started
// 2) Version Changes
const needed_version = std.SemanticVersion.parse("0.8.0-dev.1983") catch unreachable;
const Exercise = struct {
/// main_file must have the format key_name.zig.
/// The key will be used as a shorthand to build
/// just one example.
main_file: []const u8,
/// This is the desired output of the program.
/// A program passes if its output ends with this string.
output: []const u8,
/// This is an optional hint to give if the program does not succeed.
hint: []const u8 = "",
/// By default, we verify output against stderr.
/// Set this to true to check stdout instead.
check_stdout: bool = false,
/// Returns the name of the main file with .zig stripped.
pub fn baseName(self: Exercise) []const u8 {
assert(std.mem.endsWith(u8, self.main_file, ".zig"));
return self.main_file[0 .. self.main_file.len - 4];
}
/// Returns the key of the main file, the string before the '_' with
/// "zero padding" removed.
/// For example, "001_hello.zig" has the key "1".
pub fn key(self: Exercise) []const u8 {
const end_index = std.mem.indexOfScalar(u8, self.main_file, '_');
assert(end_index != null); // main file must be key_description.zig
// remove zero padding by advancing index past '0's
var start_index: usize = 0;
while (self.main_file[start_index] == '0') start_index += 1;
return self.main_file[start_index..end_index.?];
}
};
const exercises = [_]Exercise{
.{
.main_file = "001_hello.zig",
.output = "Hello world",
.hint = "DON'T PANIC!\nRead the error above.\nSee how it has something to do with 'main'?\nOpen up the source file as noted and read the comments.\nYou can do this!",
},
.{
.main_file = "002_std.zig",
.output = "Standard Library",
},
.{
.main_file = "003_assignment.zig",
.output = "55 314159 -11",
.hint = "There are three mistakes in this one!",
},
.{
.main_file = "004_arrays.zig",
.output = "Fourth: 7, Length: 8",
.hint = "There are two things to complete here.",
},
.{
.main_file = "005_arrays2.zig",
.output = "LEET: 1337, Bits: 100110011001",
.hint = "Fill in the two arrays.",
},
.{
.main_file = "006_strings.zig",
.output = "d=d ha ha ha Major Tom",
.hint = "Each '???' needs something filled in.",
},
.{
.main_file = "007_strings2.zig",
.output = "Ziggy played guitar\nJamming good with Andrew Kelley\nAnd the Spiders from Mars",
.hint = "Please fix the lyrics!",
},
.{
.main_file = "008_quiz.zig",
.output = "Program in Zig!",
.hint = "See if you can fix the program!",
},
.{
.main_file = "009_if.zig",
.output = "Foo is 1!",
},
.{
.main_file = "010_if2.zig",
.output = "With the discount, the price is $17.",
},
.{
.main_file = "011_while.zig",
.output = "2 4 8 16 32 64 128 256 512 n=1024",
.hint = "You probably want a 'less than' condition.",
},
.{
.main_file = "012_while2.zig",
.output = "2 4 8 16 32 64 128 256 512 n=1024",
.hint = "It might help to look back at the previous exercise.",
},
.{
.main_file = "013_while3.zig",
.output = "1 2 4 7 8 11 13 14 16 17 19",
},
.{
.main_file = "014_while4.zig",
.output = "n=4",
},
.{
.main_file = "015_for.zig",
.output = "A Dramatic Story: :-) :-) :-( :-| :-) The End.",
},
.{
.main_file = "016_for2.zig",
.output = "13",
},
.{
.main_file = "017_quiz2.zig",
.output = "1, 2, Fizz, 4, Buzz, Fizz, 7, 8, Fizz, Buzz, 11, Fizz, 13, 14, FizzBuzz, 16,",
.hint = "This is a famous game!",
},
.{
.main_file = "018_functions.zig",
.output = "Answer to the Ultimate Question: 42",
.hint = "Can you help write the function?",
},
.{
.main_file = "019_functions2.zig",
.output = "2 4 8 16",
},
.{
.main_file = "020_quiz3.zig",
.output = "32 64 128 256",
.hint = "Unexpected pop quiz! Help!",
},
.{
.main_file = "021_errors.zig",
.output = "2<4. 3<4. 4=4. 5>4. 6>4.",
.hint = "What's the deal with fours?",
},
.{
.main_file = "022_errors2.zig",
.output = "I compiled",
.hint = "Get the error union type right to allow this to compile.",
},
.{
.main_file = "023_errors3.zig",
.output = "a=64, b=22",
},
.{
.main_file = "024_errors4.zig",
.output = "a=20, b=14, c=10",
},
.{
.main_file = "025_errors5.zig",
.output = "a=0, b=19, c=0",
},
.{
.main_file = "026_hello2.zig",
.output = "Hello world!",
.hint = "Try using a try!",
.check_stdout = true,
},
.{
.main_file = "027_defer.zig",
.output = "One Two",
},
.{
.main_file = "028_defer2.zig",
.output = "(Goat) (Cat) (Dog) (Dog) (Goat) (Unknown) done.",
},
.{
.main_file = "029_errdefer.zig",
.output = "Getting number...got 5. Getting number...failed!",
},
.{
.main_file = "030_switch.zig",
.output = "ZIG?",
},
.{
.main_file = "031_switch2.zig",
.output = "ZIG!",
},
.{
.main_file = "032_unreachable.zig",
.output = "1 2 3 9 8 7",
},
.{
.main_file = "033_iferror.zig",
.output = "2<4. 3<4. 4=4. 5>4. 6>4.",
.hint = "Seriously, what's the deal with fours?",
},
.{
.main_file = "034_quiz4.zig",
.output = "my_num=42",
.hint = "Can you make this work?",
.check_stdout = true,
},
.{
.main_file = "035_enums.zig",
.output = "1 2 3 9 8 7",
.hint = "This problem seems familiar...",
},
.{
.main_file = "036_enums2.zig",
.output = "<p>\n <span style=\"color: #ff0000\">Red</span>\n <span style=\"color: #00ff00\">Green</span>\n <span style=\"color: #0000ff\">Blue</span>\n</p>",
.hint = "I'm feeling blue about this.",
},
.{
.main_file = "037_structs.zig",
.output = "Your wizard has 90 health and 25 gold.",
},
.{
.main_file = "038_structs2.zig",
.output = "Character 1 - G:20 H:100 XP:10\nCharacter 2 - G:10 H:100 XP:20",
},
.{
.main_file = "039_pointers.zig",
.output = "num1: 5, num2: 5",
.hint = "Pointers aren't so bad.",
},
.{
.main_file = "040_pointers2.zig",
.output = "a: 12, b: 12",
},
.{
.main_file = "041_pointers3.zig",
.output = "foo=6, bar=11",
},
.{
.main_file = "042_pointers4.zig",
.output = "num: 5, more_nums: 1 1 5 1",
},
.{
.main_file = "043_pointers5.zig",
.output = "Wizard (G:10 H:100 XP:20)",
},
.{
.main_file = "044_quiz5.zig",
.output = "Elephant A. Elephant B. Elephant C.",
.hint = "Oh no! We forgot Elephant B!",
},
.{
.main_file = "045_optionals.zig",
.output = "The Ultimate Answer: 42.",
},
.{
.main_file = "046_optionals2.zig",
.output = "Elephant A. Elephant B. Elephant C.",
.hint = "Elephants again!",
},
.{
.main_file = "047_methods.zig",
.output = "5 aliens. 4 aliens. 1 aliens. 0 aliens. Earth is saved!",
.hint = "Use the heat ray. And the method!",
},
.{
.main_file = "048_methods2.zig",
.output = "A B C",
.hint = "This just needs one little fix.",
},
.{
.main_file = "049_quiz6.zig",
.output = "A B C Cv Bv Av",
.hint = "Now you're writing Zig!",
},
.{
.main_file = "050_no_value.zig",
.output = "That is not dead which can eternal lie / And with strange aeons even death may die.",
},
.{
.main_file = "051_values.zig",
.output = "1:false!. 2:true!. 3:true!. XP before:0, after:200.",
},
.{
.main_file = "052_slices.zig",
.output = "Hand1: A 4 K 8 Hand2: 5 2 Q J",
},
.{
.main_file = "053_slices2.zig",
.output = "'all your base are belong to us.' 'for great justice.'",
},
.{
.main_file = "054_manypointers.zig",
.output = "Memory is a resource.",
},
.{
.main_file = "055_unions.zig",
.output = "Insect report! Ant alive is: true. Bee visited 15 flowers.",
},
.{
.main_file = "056_unions2.zig",
.output = "Insect report! Ant alive is: true. Bee visited 16 flowers.",
},
.{
.main_file = "057_unions3.zig",
.output = "Insect report! Ant alive is: true. Bee visited 17 flowers.",
},
.{
.main_file = "058_quiz7.zig",
.output = "Archer's Point--2->Bridge--1->Dogwood Grove--3->Cottage--2->East Pond--1->Fox Pond",
.hint = "This is the biggest program we've seen yet. But you can do it!"
},
.{
.main_file = "059_integers.zig",
.output = "Zig is cool.",
},
.{
.main_file = "060_floats.zig",
.output = "Shuttle liftoff weight: 1995796kg",
},
.{
.main_file = "061_coercions.zig",
.output = "Letter: A",
},
.{
.main_file = "062_loop_expressions.zig",
.output = "Current language: Zig",
.hint = "Surely the current language is 'Zig'!",
},
.{
.main_file = "063_labels.zig",
.output = "Enjoy your Cheesy Chili!",
},
.{
.main_file = "064_builtins.zig",
.output = "1101 + 0101 = 0010 (true). Furthermore, 11110000 backwards is 00001111.",
},
.{
.main_file = "065_builtins2.zig",
.output = "A Narcissus loves all Narcissuses. He has room in his heart for: me myself.",
},
.{
.main_file = "066_comptime.zig",
.output = "Immutable: 12345, 987.654; Mutable: 54321, 456.789; Types: comptime_int, comptime_float, u32, f32",
.hint = "It may help to read this one out loud to your favorite stuffed animal until it sinks in completely."
},
.{
.main_file = "067_comptime2.zig",
.output = "A BB CCC DDDD",
},
.{
.main_file = "068_comptime3.zig",
.output = "Minnow (1:32, 4 x 2)\nShark (1:16, 8 x 5)\nWhale (1:1, 143 x 95)\n",
},
.{
.main_file = "069_comptime4.zig",
.output = "s1={ 1, 2, 3 }, s2={ 1, 2, 3, 4, 5 }, s3={ 1, 2, 3, 4, 5, 6, 7 }",
},
.{
.main_file = "070_comptime5.zig",
.output = "\"Quack.\" ducky1: true, \"Squeek!\" ducky2: true, ducky3: false",
.hint = "Have you kept the wizard hat on?",
},
.{
.main_file = "071_comptime6.zig",
.output = "Narcissus has room in his heart for: me myself.",
},
.{
.main_file = "072_comptime7.zig",
.output = "26",
},
.{
.main_file = "073_comptime8.zig",
.output = "My llama value is 25.",
},
.{
.main_file = "074_comptime9.zig",
.output = "My llama value is 2.",
},
.{
.main_file = "075_quiz8.zig",
.output = "Archer's Point--2->Bridge--1->Dogwood Grove--3->Cottage--2->East Pond--1->Fox Pond",
.hint = "Roll up those sleeves. You get to WRITE some code for this one.",
},
.{
.main_file = "076_sentinels.zig",
.output = "Array:123056. Many-item pointer:123.",
},
.{
.main_file = "077_sentinels2.zig",
.output = "Weird Data!",
},
.{
.main_file = "078_sentinels3.zig",
.output = "Weird Data!",
},
.{
.main_file = "079_quoted_identifiers.zig",
.output = "Sweet freedom: 55, false.",
.hint = "Help us, Zig Programmer, you're our only hope!",
},
.{
.main_file = "080_anonymous_structs.zig",
.output = "[Circle(i32): 25,70,15] [Circle(f32): 25.2,71.0,15.7]",
},
.{
.main_file = "081_anonymous_structs2.zig",
.output = "x:205 y:187 radius:12",
},
.{
.main_file = "082_anonymous_structs3.zig",
.output = "\"0\"(bool):true \"1\"(bool):false \"2\"(i32):42 \"3\"(f32):3.14159202e+00",
.hint = "This one is a challenge! But you have everything you need.",
},
.{
.main_file = "083_anonymous_lists.zig",
.output = "I say hello!",
},
.{
.main_file = "084_async.zig",
.output = "foo() A",
.hint = "Read the facts. Use the facts.",
},
.{
.main_file = "085_async2.zig",
.output = "Hello async!",
},
.{
.main_file = "086_async3.zig",
.output = "5 4 3 2 1",
},
.{
.main_file = "087_async4.zig",
.output = "1 2 3 4 5",
},
.{
.main_file = "088_async5.zig",
.output = "Example Title.",
},
};
/// Check the zig version to make sure it can compile the examples properly.
/// This will compile with Zig 0.6.0 and later.
fn checkVersion() bool {
if (!@hasDecl(std.builtin, "zig_version")) {
return false;
}
const version = std.builtin.zig_version;
const order = version.order(needed_version);
return order != .lt;
}
pub fn build(b: *Builder) void {
// Use a comptime branch for the version check.
// If this fails, code after this block is not compiled.
// It is parsed though, so versions of zig from before 0.6.0
// cannot do the version check and will just fail to compile.
// We could fix this by moving the ziglings code to a separate file,
// but 0.5.0 was a long time ago, it is unlikely that anyone who
// attempts these exercises is still using it.
if (comptime !checkVersion()) {
// very old versions of Zig used warn instead of print.
const stderrPrintFn = if (@hasDecl(std.debug, "print")) std.debug.print else std.debug.warn;
stderrPrintFn(
\\ERROR: Sorry, it looks like your version of zig is too old. :-(
\\
\\Ziglings requires development build
\\
\\ {}
\\
\\or higher. Please download a development ("master") build from
\\
\\ https://ziglang.org/download/
\\
\\
, .{needed_version});
std.os.exit(0);
}
use_color_escapes = false;
switch (b.color) {
.on => use_color_escapes = true,
.off => use_color_escapes = false,
.auto => {
if (std.io.getStdErr().supportsAnsiEscapeCodes()) {
use_color_escapes = true;
} else if (std.builtin.os.tag == .windows) {
const w32 = struct {
const WINAPI = std.os.windows.WINAPI;
const DWORD = std.os.windows.DWORD;
const ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004;
const STD_ERROR_HANDLE = @bitCast(DWORD, @as(i32, -12));
extern "kernel32" fn GetStdHandle(id: DWORD) callconv(WINAPI) ?*c_void;
extern "kernel32" fn GetConsoleMode(console: ?*c_void, out_mode: *DWORD) callconv(WINAPI) u32;
extern "kernel32" fn SetConsoleMode(console: ?*c_void, mode: DWORD) callconv(WINAPI) u32;
};
const handle = w32.GetStdHandle(w32.STD_ERROR_HANDLE);
var mode: w32.DWORD = 0;
if (w32.GetConsoleMode(handle, &mode) != 0) {
mode |= w32.ENABLE_VIRTUAL_TERMINAL_PROCESSING;
use_color_escapes = w32.SetConsoleMode(handle, mode) != 0;
}
}
},
}
if (use_color_escapes) {
red_text = "\x1b[31m";
green_text = "\x1b[32m";
bold_text = "\x1b[1m";
reset_text = "\x1b[0m";
}
const header_step = b.addLog(
\\
\\ _ _ _
\\ ___(_) __ _| (_)_ __ __ _ ___
\\ |_ | |/ _' | | | '_ \ / _' / __|
\\ / /| | (_| | | | | | | (_| \__ \
\\ /___|_|\__, |_|_|_| |_|\__, |___/
\\ |___/ |___/
\\
\\
, .{});
const verify_all = b.step("ziglings", "Check all ziglings");
verify_all.dependOn(&header_step.step);
b.default_step = verify_all;
var prev_chain_verify = verify_all;
const use_healed = b.option(bool, "healed", "Run exercises from patches/healed") orelse false;
for (exercises) |ex| {
const base_name = ex.baseName();
const file_path = std.fs.path.join(b.allocator, &[_][]const u8{
if (use_healed) "patches/healed" else "exercises", ex.main_file,
}) catch unreachable;
const build_step = b.addExecutable(base_name, file_path);
build_step.install();
const verify_step = ZiglingStep.create(b, ex, use_healed);
const key = ex.key();
const named_test = b.step(b.fmt("{s}_test", .{key}), b.fmt("Run {s} without checking output", .{ex.main_file}));
const run_step = build_step.run();
named_test.dependOn(&run_step.step);
const named_install = b.step(b.fmt("{s}_install", .{key}), b.fmt("Install {s} to zig-cache/bin", .{ex.main_file}));
named_install.dependOn(&build_step.install_step.?.step);
const named_verify = b.step(key, b.fmt("Check {s} only", .{ex.main_file}));
named_verify.dependOn(&verify_step.step);
const chain_verify = b.allocator.create(Step) catch unreachable;
chain_verify.* = Step.initNoOp(.Custom, b.fmt("chain {s}", .{key}), b.allocator);
chain_verify.dependOn(&verify_step.step);
const named_chain = b.step(b.fmt("{s}_start", .{key}), b.fmt("Check all solutions starting at {s}", .{ex.main_file}));
named_chain.dependOn(&header_step.step);
named_chain.dependOn(chain_verify);
prev_chain_verify.dependOn(chain_verify);
prev_chain_verify = chain_verify;
}
}
var use_color_escapes = false;
var red_text: []const u8 = "";
var green_text: []const u8 = "";
var bold_text: []const u8 = "";
var reset_text: []const u8 = "";
const ZiglingStep = struct {
step: Step,
exercise: Exercise,
builder: *Builder,
use_healed: bool,
pub fn create(builder: *Builder, exercise: Exercise, use_healed: bool) *@This() {
const self = builder.allocator.create(@This()) catch unreachable;
self.* = .{
.step = Step.init(.Custom, exercise.main_file, builder.allocator, make),
.exercise = exercise,
.builder = builder,
.use_healed = use_healed,
};
return self;
}
fn make(step: *Step) anyerror!void {
const self = @fieldParentPtr(@This(), "step", step);
self.makeInternal() catch {
if (self.exercise.hint.len > 0) {
print("\n{s}HINT: {s}{s}", .{ bold_text, self.exercise.hint, reset_text });
}
print("\n{s}Edit exercises/{s} and run this again.{s}", .{ red_text, self.exercise.main_file, reset_text });
print("\n{s}To continue from this zigling, use this command:{s}\n {s}zig build {s}{s}\n", .{ red_text, reset_text, bold_text, self.exercise.key(), reset_text });
std.os.exit(0);
};
}
fn makeInternal(self: *@This()) !void {
print("Compiling {s}...\n", .{self.exercise.main_file});
const exe_file = try self.doCompile();
print("Checking {s}...\n", .{self.exercise.main_file});
const cwd = self.builder.build_root;
const argv = [_][]const u8{exe_file};
const child = std.ChildProcess.init(&argv, self.builder.allocator) catch unreachable;
defer child.deinit();
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;
};
// 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);
// 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 });
return err;
};
// make sure it exited cleanly.
switch (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 });
return error.BadExitCode;
}
},
else => {
print("{s}{s} terminated unexpectedly{s}\n", .{ red_text, self.exercise.main_file, reset_text });
return error.UnexpectedTermination;
},
}
// validate the output
if (std.mem.indexOf(u8, output, self.exercise.output) == null) {
print(
\\
\\{s}----------- Expected this output -----------{s}
\\{s}
\\{s}----------- but found -----------{s}
\\{s}
\\{s}-----------{s}
\\
, .{ red_text, reset_text, self.exercise.output, red_text, reset_text, output, red_text, reset_text });
return error.InvalidOutput;
}
print("{s}PASSED: {s}{s}\n", .{ green_text, output, reset_text });
}
// The normal compile step calls os.exit, so we can't use it as a library :(
// This is a stripped down copy of std.build.LibExeObjStep.make.
fn doCompile(self: *@This()) ![]const u8 {
const builder = self.builder;
var zig_args = std.ArrayList([]const u8).init(builder.allocator);
defer zig_args.deinit();
zig_args.append(builder.zig_exe) catch unreachable;
zig_args.append("build-exe") catch unreachable;
if (builder.color != .auto) {
zig_args.append("--color") catch unreachable;
zig_args.append(@tagName(builder.color)) catch unreachable;
}
const zig_file = std.fs.path.join(builder.allocator, &[_][]const u8{ if (self.use_healed) "patches/healed" else "exercises", self.exercise.main_file }) catch unreachable;
zig_args.append(builder.pathFromRoot(zig_file)) catch unreachable;
zig_args.append("--cache-dir") catch unreachable;
zig_args.append(builder.pathFromRoot(builder.cache_root)) catch unreachable;
zig_args.append("--enable-cache") catch unreachable;
const argv = zig_args.items;
var code: u8 = undefined;
const output_dir_nl = builder.execAllowFail(argv, &code, .Inherit) catch |err| {
switch (err) {
error.FileNotFound => {
print("{s}{s}: Unable to spawn the following command: file not found{s}\n", .{ red_text, self.exercise.main_file, reset_text });
for (argv) |v| print("{s} ", .{v});
print("\n", .{});
},
error.ExitCodeFailure => {
print("{s}{s}: The following command exited with error code {}:{s}\n", .{ red_text, self.exercise.main_file, code, reset_text });
for (argv) |v| print("{s} ", .{v});
print("\n", .{});
},
error.ProcessTerminated => {
print("{s}{s}: The following command terminated unexpectedly:{s}\n", .{ red_text, self.exercise.main_file, reset_text });
for (argv) |v| print("{s} ", .{v});
print("\n", .{});
},
else => {},
}
return err;
};
const build_output_dir = std.mem.trimRight(u8, output_dir_nl, "\r\n");
const target_info = std.zig.system.NativeTargetInfo.detect(
builder.allocator,
.{},
) catch unreachable;
const target = target_info.target;
const file_name = std.zig.binNameAlloc(builder.allocator, .{
.root_name = self.exercise.baseName(),
.target = target,
.output_mode = .Exe,
.link_mode = .Static,
.version = null,
}) catch unreachable;
return std.fs.path.join(builder.allocator, &[_][]const u8{
build_output_dir, file_name,
});
}
};
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