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Merge pull request #246 from perillo/build-restore-compatibility-2

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build: restore compatibility with old Zig compilers
This commit is contained in:
Chris Boesch 2023-04-18 18:06:41 +02:00 committed by GitHub
commit b84217161c
2 changed files with 113 additions and 43 deletions
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88
build.zig
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@ -1,6 +1,7 @@
const std = @import("std");
const builtin = @import("builtin");
const compat = @import("src/compat.zig");
const ipc = @import("src/ipc.zig");
const tests = @import("test/tests.zig");
const Build = compat.Build;
@ -689,6 +690,9 @@ const ZiglingStep = struct {
builder: *Build,
use_healed: bool,
result_messages: []const u8 = "",
result_error_bundle: std.zig.ErrorBundle = std.zig.ErrorBundle.empty,
pub fn create(builder: *Build, exercise: Exercise, use_healed: bool) *@This() {
const self = builder.allocator.create(@This()) catch unreachable;
self.* = .{
@ -724,6 +728,7 @@ const ZiglingStep = struct {
const exe_file = try self.doCompile(prog_node);
resetLine();
print("Checking {s}...\n", .{self.exercise.main_file});
const cwd = self.builder.build_root.path.?;
@ -828,6 +833,8 @@ const ZiglingStep = struct {
const argv = zig_args.items;
var code: u8 = undefined;
const file_name = self.eval(argv, &code, prog_node) catch |err| {
self.printErrors();
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 });
@ -844,11 +851,21 @@ const ZiglingStep = struct {
for (argv) |v| print("{s} ", .{v});
print("\n", .{});
},
error.ZigIPCError => {
print("{s}{s}: The following command failed to communicate the compilation result:{s}\n", .{
red_text,
self.exercise.main_file,
reset_text,
});
for (argv) |v| print("{s} ", .{v});
print("\n", .{});
},
else => {},
}
return err;
};
self.printErrors();
return file_name;
}
@ -878,8 +895,8 @@ const ZiglingStep = struct {
});
defer poller.deinit();
try sendMessage(child.stdin.?, .update);
try sendMessage(child.stdin.?, .exit);
try ipc.sendMessage(child.stdin.?, .update);
try ipc.sendMessage(child.stdin.?, .exit);
const Header = std.zig.Server.Message.Header;
var result: ?[]const u8 = null;
@ -907,31 +924,7 @@ const ZiglingStep = struct {
return error.ZigVersionMismatch;
},
.error_bundle => {
const EbHdr = std.zig.Server.Message.ErrorBundle;
const eb_hdr = @ptrCast(*align(1) const EbHdr, body);
const extra_bytes =
body[@sizeOf(EbHdr)..][0 .. @sizeOf(u32) * eb_hdr.extra_len];
const string_bytes =
body[@sizeOf(EbHdr) + extra_bytes.len ..][0..eb_hdr.string_bytes_len];
// TODO: use @ptrCast when the compiler supports it
const unaligned_extra = std.mem.bytesAsSlice(u32, extra_bytes);
const extra_array = try allocator.alloc(u32, unaligned_extra.len);
// TODO: use @memcpy when it supports slices
for (extra_array, unaligned_extra) |*dst, src| dst.* = src;
const error_bundle: std.zig.ErrorBundle = .{
.string_bytes = try allocator.dupe(u8, string_bytes),
.extra = extra_array,
};
// Print the compiler error bundle now.
// TODO: use the same ttyconf from the builder.
const ttyconf: std.debug.TTY.Config = if (use_color_escapes)
.escape_codes
else
.no_color;
error_bundle.renderToStdErr(
.{ .ttyconf = ttyconf },
);
self.result_error_bundle = try ipc.parseErrorBundle(allocator, body);
},
.progress => {
node_name.clearRetainingCapacity();
@ -939,13 +932,8 @@ const ZiglingStep = struct {
sub_prog_node.setName(node_name.items);
},
.emit_bin_path => {
const EbpHdr = std.zig.Server.Message.EmitBinPath;
// TODO: add cache support?
//const ebp_hdr = @ptrCast(*align(1) const EbpHdr, body);
//s.result_cached = ebp_hdr.flags.cache_hit;
result = try allocator.dupe(u8, body[@sizeOf(EbpHdr)..]);
const emit_bin = try ipc.parseEmitBinPath(allocator, body);
result = emit_bin.path;
},
else => {}, // ignore other messages
}
@ -955,9 +943,7 @@ const ZiglingStep = struct {
const stderr = poller.fifo(.stderr);
if (stderr.readableLength() > 0) {
// Print the additional log and verbose messages now.
const messages = try stderr.toOwnedSlice();
print("{s}\n", .{messages});
self.result_messages = try stderr.toOwnedSlice();
}
// Send EOF to stdin.
@ -983,14 +969,30 @@ const ZiglingStep = struct {
return result orelse return error.ZigIPCError;
}
fn printErrors(self: *ZiglingStep) void {
resetLine();
// Print the additional log and verbose messages.
// TODO: use colors?
if (self.result_messages.len > 0) print("{s}", .{self.result_messages});
// Print the compiler errors.
// TODO: use the same ttyconf from the builder.
const ttyconf: std.debug.TTY.Config = if (use_color_escapes)
.escape_codes
else
.no_color;
if (self.result_error_bundle.errorMessageCount() > 0) {
self.result_error_bundle.renderToStdErr(.{ .ttyconf = ttyconf });
}
}
};
fn sendMessage(file: std.fs.File, tag: std.zig.Client.Message.Tag) !void {
const header: std.zig.Client.Message.Header = .{
.tag = tag,
.bytes_len = 0,
};
try file.writeAll(std.mem.asBytes(&header));
// Clear the entire line and move the cursor to column zero.
// Used for clearing the compiler and build_runner progress messages.
fn resetLine() void {
if (use_color_escapes) print("{s}", .{"\x1b[2K\r"});
}
// Print a message to stderr.

68
src/ipc.zig Normal file
View file

@ -0,0 +1,68 @@
/// Client side support for Zig IPC.
const std = @import("std");
const debug = std.debug;
const fs = std.fs;
const mem = std.mem;
const Allocator = mem.Allocator;
const Client = std.zig.Client;
const ErrorBundle = std.zig.ErrorBundle;
const Server = std.zig.Server;
/// This data structure must be kept in sync with zig.Server.Message.EmitBinPath.
const EmitBinPath = struct {
flags: Flags,
path: []const u8,
pub const Flags = Server.Message.EmitBinPath.Flags;
pub fn deinit(self: *EmitBinPath, allocator: Allocator) void {
allocator.free(self.path);
self.* = undefined;
}
};
pub fn parseErrorBundle(allocator: Allocator, data: []const u8) !ErrorBundle {
const EbHdr = Server.Message.ErrorBundle;
const eb_hdr = @ptrCast(*align(1) const EbHdr, data);
const extra_bytes =
data[@sizeOf(EbHdr)..][0 .. @sizeOf(u32) * eb_hdr.extra_len];
const string_bytes =
data[@sizeOf(EbHdr) + extra_bytes.len ..][0..eb_hdr.string_bytes_len];
// TODO: use @ptrCast when the compiler supports it
const unaligned_extra = std.mem.bytesAsSlice(u32, extra_bytes);
const extra_array = try allocator.alloc(u32, unaligned_extra.len);
// TODO: use @memcpy when it supports slices
//
// Don't use the "multi-object for loop" syntax, in
// order to avoid a syntax error with old Zig compilers.
var i: usize = 0;
while (i < extra_array.len) : (i += 1) {
extra_array[i] = unaligned_extra[i];
}
return .{
.string_bytes = try allocator.dupe(u8, string_bytes),
.extra = extra_array,
};
}
pub fn parseEmitBinPath(allocator: Allocator, data: []const u8) !EmitBinPath {
const EbpHdr = Server.Message.EmitBinPath;
const ebp_hdr = @ptrCast(*align(1) const EbpHdr, data);
const path = try allocator.dupe(u8, data[@sizeOf(EbpHdr)..]);
return .{
.flags = ebp_hdr.flags,
.path = path,
};
}
pub fn sendMessage(file: fs.File, tag: Client.Message.Tag) !void {
const header: Client.Message.Header = .{
.tag = tag,
.bytes_len = 0,
};
try file.writeAll(mem.asBytes(&header));
}