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const std = @import("std");
const testing = std.testing;
const process = std.process;
const fs = std.fs;
const ChildProcess = std.ChildProcess;
var a: *std.mem.Allocator = undefined;
pub fn main() !void {
var arena = std.heap.ArenaAllocator.init(std.testing.allocator);
defer arena.deinit();
var arg_it = process.args();
// skip my own exe name
_ = arg_it.skip();
a = &arena.allocator;
const zig_exe_rel = try (arg_it.next(a) orelse {
std.debug.warn("Expected first argument to be path to zig compiler\n", .{});
return error.InvalidArgs;
});
const cache_root = try (arg_it.next(a) orelse {
std.debug.warn("Expected second argument to be cache root directory path\n", .{});
return error.InvalidArgs;
});
const zig_exe = try fs.path.resolve(a, &[_][]const u8{zig_exe_rel});
const dir_path = try fs.path.join(a, &[_][]const u8{ cache_root, "clitest" });
const TestFn = fn ([]const u8, []const u8) anyerror!void;
const test_fns = [_]TestFn{
testZigInitLib,
testZigInitExe,
testGodboltApi,
testMissingOutputPath,
testZigFmt,
};
for (test_fns) |testFn| {
try fs.cwd().deleteTree(dir_path);
try fs.cwd().makeDir(dir_path);
try testFn(zig_exe, dir_path);
}
}
fn unwrapArg(arg: UnwrapArgError![]u8) UnwrapArgError![]u8 {
return arg catch |err| {
warn("Unable to parse command line: {}\n", .{err});
return err;
};
}
fn printCmd(cwd: []const u8, argv: []const []const u8) void {
std.debug.warn("cd {s} && ", .{cwd});
for (argv) |arg| {
std.debug.warn("{s} ", .{arg});
}
std.debug.warn("\n", .{});
}
fn exec(cwd: []const u8, expect_0: bool, argv: []const []const u8) !ChildProcess.ExecResult {
const max_output_size = 100 * 1024;
const result = ChildProcess.exec(.{
.allocator = a,
.argv = argv,
.cwd = cwd,
.max_output_bytes = max_output_size,
}) catch |err| {
std.debug.warn("The following command failed:\n", .{});
printCmd(cwd, argv);
return err;
};
switch (result.term) {
.Exited => |code| {
if ((code != 0) == expect_0) {
std.debug.warn("The following command exited with error code {}:\n", .{code});
printCmd(cwd, argv);
std.debug.warn("stderr:\n{s}\n", .{result.stderr});
return error.CommandFailed;
}
},
else => {
std.debug.warn("The following command terminated unexpectedly:\n", .{});
printCmd(cwd, argv);
std.debug.warn("stderr:\n{s}\n", .{result.stderr});
return error.CommandFailed;
},
}
return result;
}
fn testZigInitLib(zig_exe: []const u8, dir_path: []const u8) !void {
_ = try exec(dir_path, true, &[_][]const u8{ zig_exe, "init-lib" });
const test_result = try exec(dir_path, true, &[_][]const u8{ zig_exe, "build", "test" });
testing.expectStringEndsWith(test_result.stderr, "All 1 tests passed.\n");
}
fn testZigInitExe(zig_exe: []const u8, dir_path: []const u8) !void {
_ = try exec(dir_path, true, &[_][]const u8{ zig_exe, "init-exe" });
const run_result = try exec(dir_path, true, &[_][]const u8{ zig_exe, "build", "run" });
testing.expectEqualStrings("info: All your codebase are belong to us.\n", run_result.stderr);
}
fn testGodboltApi(zig_exe: []const u8, dir_path: []const u8) anyerror!void {
if (std.Target.current.os.tag != .linux or std.Target.current.cpu.arch != .x86_64) return;
const example_zig_path = try fs.path.join(a, &[_][]const u8{ dir_path, "example.zig" });
const example_s_path = try fs.path.join(a, &[_][]const u8{ dir_path, "example.s" });
try fs.cwd().writeFile(example_zig_path,
\\// Type your code here, or load an example.
\\export fn square(num: i32) i32 {
\\ return num * num;
\\}
\\extern fn zig_panic() noreturn;
\\pub fn panic(msg: []const u8, error_return_trace: ?*@import("builtin").StackTrace) noreturn {
\\ zig_panic();
\\}
);
var args = std.ArrayList([]const u8).init(a);
try args.appendSlice(&[_][]const u8{
zig_exe, "build-obj",
"--cache-dir", dir_path,
"--name", "example",
"-fno-emit-bin", "-fno-emit-h",
"--strip", "-OReleaseFast",
example_zig_path,
});
const emit_asm_arg = try std.fmt.allocPrint(a, "-femit-asm={s}", .{example_s_path});
try args.append(emit_asm_arg);
_ = try exec(dir_path, true, args.items);
const out_asm = try std.fs.cwd().readFileAlloc(a, example_s_path, std.math.maxInt(usize));
testing.expect(std.mem.indexOf(u8, out_asm, "square:") != null);
testing.expect(std.mem.indexOf(u8, out_asm, "mov\teax, edi") != null);
testing.expect(std.mem.indexOf(u8, out_asm, "imul\teax, edi") != null);
}
fn testMissingOutputPath(zig_exe: []const u8, dir_path: []const u8) !void {
_ = try exec(dir_path, true, &[_][]const u8{ zig_exe, "init-exe" });
const output_path = try fs.path.join(a, &[_][]const u8{ "does", "not", "exist", "foo.exe" });
const output_arg = try std.fmt.allocPrint(a, "-femit-bin={s}", .{output_path});
const source_path = try fs.path.join(a, &[_][]const u8{ "src", "main.zig" });
const result = try exec(dir_path, false, &[_][]const u8{ zig_exe, "build-exe", source_path, output_arg });
const s = std.fs.path.sep_str;
const expected: []const u8 = "error: unable to open output directory 'does" ++ s ++ "not" ++ s ++ "exist': FileNotFound\n";
testing.expectEqualStrings(expected, result.stderr);
}
fn testZigFmt(zig_exe: []const u8, dir_path: []const u8) !void {
_ = try exec(dir_path, true, &[_][]const u8{ zig_exe, "init-exe" });
const unformatted_code = " // no reason for indent";
const fmt1_zig_path = try fs.path.join(a, &[_][]const u8{ dir_path, "fmt1.zig" });
try fs.cwd().writeFile(fmt1_zig_path, unformatted_code);
const run_result1 = try exec(dir_path, true, &[_][]const u8{ zig_exe, "fmt", fmt1_zig_path });
// stderr should be file path + \n
testing.expect(std.mem.startsWith(u8, run_result1.stdout, fmt1_zig_path));
testing.expect(run_result1.stdout.len == fmt1_zig_path.len + 1 and run_result1.stdout[run_result1.stdout.len - 1] == '\n');
const fmt2_zig_path = try fs.path.join(a, &[_][]const u8{ dir_path, "fmt2.zig" });
try fs.cwd().writeFile(fmt2_zig_path, unformatted_code);
const run_result2 = try exec(dir_path, true, &[_][]const u8{ zig_exe, "fmt", dir_path });
// running it on the dir, only the new file should be changed
testing.expect(std.mem.startsWith(u8, run_result2.stdout, fmt2_zig_path));
testing.expect(run_result2.stdout.len == fmt2_zig_path.len + 1 and run_result2.stdout[run_result2.stdout.len - 1] == '\n');
const run_result3 = try exec(dir_path, true, &[_][]const u8{ zig_exe, "fmt", dir_path });
// both files have been formatted, nothing should change now
testing.expect(run_result3.stdout.len == 0);
}
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