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bun.sh/src/bundler/generate_node_modules_bundle.zig
Alex Lam S.L e887a064fb prefer bun.copy() over std.mem.copy() (#2152)
2023-02-24 05:53:26 -08:00

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const Bundler = bun.Bundler;
const GenerateNodeModulesBundle = @This();
const bun = @import("bun");
const string = bun.string;
const Output = bun.Output;
const Global = bun.Global;
const Environment = bun.Environment;
const strings = bun.strings;
const MutableString = bun.MutableString;
const stringZ = bun.stringZ;
const default_allocator = bun.default_allocator;
const StoredFileDescriptorType = bun.StoredFileDescriptorType;
const FeatureFlags = bun.FeatureFlags;
const C = bun.C;
const std = @import("std");
const lex = bun.js_lexer;
const logger = @import("bun").logger;
const options = @import("../options.zig");
const js_parser = bun.js_parser;
const json_parser = bun.JSON;
const js_printer = bun.js_printer;
const js_ast = bun.JSAst;
const linker = @import("../linker.zig");
const Ref = @import("../ast/base.zig").Ref;
const Define = @import("../defines.zig").Define;
const DebugOptions = @import("../cli.zig").Command.DebugOptions;
const ThreadPoolLib = @import("../thread_pool.zig");
const Fs = @import("../fs.zig");
const schema = @import("../api/schema.zig");
const Api = schema.Api;
const _resolver = @import("../resolver/resolver.zig");
const sync = @import("../sync.zig");
const ImportRecord = @import("../import_record.zig").ImportRecord;
const allocators = @import("../allocators.zig");
const MimeType = @import("../http/mime_type.zig");
const resolve_path = @import("../resolver/resolve_path.zig");
const runtime = @import("../runtime.zig");
const PackageJSON = @import("../resolver/package_json.zig").PackageJSON;
const MacroRemap = @import("../resolver/package_json.zig").MacroMap;
const DebugLogs = _resolver.DebugLogs;
const NodeModuleBundle = @import("../node_module_bundle.zig").NodeModuleBundle;
const Router = @import("../router.zig");
const isPackagePath = _resolver.isPackagePath;
const Lock = @import("../lock.zig").Lock;
const NodeFallbackModules = @import("../node_fallbacks.zig");
const CacheEntry = @import("../cache.zig").FsCacheEntry;
const Analytics = @import("../analytics/analytics_thread.zig");
const URL = @import("../url.zig").URL;
const Report = @import("../report.zig");
const Linker = linker.Linker;
const Resolver = _resolver.Resolver;
const TOML = @import("../toml/toml_parser.zig").TOML;
const EntryPoints = @import("./entry_points.zig");
const BunQueue = sync.Channel(PendingImports, .Dynamic);
const GenerateNodeModuleBundle = @This();
const ThisBundler = bun.Bundler;
const JSC = @import("bun").JSC;
pub const ThreadPool = struct {
pool: ThreadPoolLib = undefined,
// Hardcode 512 as max number of threads for now.
workers: [512]Worker = undefined,
workers_used: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
cpu_count: u32 = 0,
started_workers: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
stopped_workers: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
completed_count: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
pending_count: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
generator: *GenerateNodeModuleBundle = undefined,
pub fn start(this: *ThreadPool, generator: *GenerateNodeModuleBundle) !void {
generator.bundler.env.loadProcess();
this.generator = generator;
this.cpu_count = @truncate(u32, @divFloor((try std.Thread.getCpuCount()) + 1, 2));
if (generator.bundler.env.map.get("GOMAXPROCS")) |max_procs| {
if (std.fmt.parseInt(u32, max_procs, 10)) |cpu_count| {
this.cpu_count = std.math.min(this.cpu_count, cpu_count);
} else |_| {}
}
this.pool = ThreadPoolLib.init(.{
.max_threads = this.cpu_count,
});
this.pool.on_thread_spawn = Worker.onSpawn;
this.pool.threadpool_context = this;
var workers_used: u32 = 0;
while (workers_used < this.cpu_count) : (workers_used += 1) {
try this.workers[workers_used].init(generator);
}
if (workers_used > 0)
this.pool.forceSpawn();
}
pub fn wait(this: *ThreadPool, generator: *GenerateNodeModuleBundle) !void {
while (true) {
while (this.generator.queue.tryReadItem() catch null) |queue| {
var iter = queue.iterator();
var batch = ThreadPoolLib.Batch{};
var count: u32 = 0;
while (iter.next()) |entry| {
const module_id: u32 = entry.key_ptr.*;
const exists = generator.enqueued_map.getOrPut(module_id) catch unreachable;
if (exists.found_existing) {
continue;
}
batch.push(ThreadPoolLib.Batch.from(&entry.value_ptr.*.task));
count += 1;
}
_ = this.pending_count.fetchAdd(count, .Monotonic);
this.pool.schedule(batch);
}
if (this.completed_count.load(.Monotonic) > 0 and this.completed_count.load(.Monotonic) == this.pending_count.load(.Monotonic)) {
break;
}
std.atomic.spinLoopHint();
}
const workers: []const Worker = this.workers[0..this.workers_used.loadUnchecked()];
for (workers) |worker| {
this.generator.estimated_input_lines_of_code += worker.data.estimated_input_lines_of_code;
try worker.data.log.appendTo(this.generator.log);
}
}
pub const Task = struct {
result: _resolver.Result,
generator: *GenerateNodeModuleBundle,
};
pub const Worker = struct {
thread_id: std.Thread.Id,
thread: std.Thread,
allocator: std.mem.Allocator,
generator: *GenerateNodeModuleBundle,
data: *WorkerData = undefined,
quit: bool = false,
has_notify_started: bool = false,
pub const WorkerData = struct {
shared_buffer: MutableString = undefined,
scan_pass_result: js_parser.ScanPassResult = undefined,
log: *logger.Log,
estimated_input_lines_of_code: usize = 0,
macro_context: js_ast.Macro.MacroContext,
bundler: Bundler = undefined,
pub fn deinit(this: *WorkerData, allocator: std.mem.Allocator) void {
this.shared_buffer.deinit();
this.scan_pass_result.named_imports.deinit();
this.scan_pass_result.import_records.deinit();
allocator.destroy(this);
}
};
pub fn init(worker: *Worker, generator: *GenerateNodeModuleBundle) !void {
worker.generator = generator;
worker.allocator = generator.allocator;
}
pub fn onSpawn(ctx: ?*anyopaque) ?*anyopaque {
var pool = @ptrCast(*ThreadPool, @alignCast(@alignOf(*ThreadPool), ctx.?));
const id = pool.workers_used.fetchAdd(1, .Monotonic);
pool.workers[id].run();
return &pool.workers[id];
}
pub fn notifyStarted(this: *Worker) void {
if (!this.has_notify_started) {
this.has_notify_started = true;
_ = this.generator.pool.started_workers.fetchAdd(1, .Release);
std.Thread.Futex.wake(&this.generator.pool.started_workers, std.math.maxInt(u32));
}
}
pub fn run(this: *Worker) void {
Output.Source.configureThread();
this.thread_id = std.Thread.getCurrentId();
if (Environment.isDebug) {
Output.prettyln("Thread started.\n", .{});
}
js_ast.Expr.Data.Store.create(this.generator.allocator);
js_ast.Stmt.Data.Store.create(this.generator.allocator);
this.data = this.generator.allocator.create(WorkerData) catch unreachable;
this.data.* = WorkerData{
.log = this.generator.allocator.create(logger.Log) catch unreachable,
.estimated_input_lines_of_code = 0,
.macro_context = js_ast.Macro.MacroContext.init(this.generator.bundler),
};
this.data.log.* = logger.Log.init(this.generator.allocator);
this.data.shared_buffer = MutableString.init(this.generator.allocator, 0) catch unreachable;
this.data.scan_pass_result = js_parser.ScanPassResult.init(this.generator.allocator);
this.data.bundler = this.generator.bundler.*;
var bundler_ptr = &this.data.bundler;
const CacheSet = @import("../cache.zig");
// no funny business mr. cache
bundler_ptr.resolver.caches = CacheSet.Set.init(this.allocator);
bundler_ptr.linker.resolver = &bundler_ptr.resolver;
bundler_ptr.log = this.data.log;
bundler_ptr.linker.log = this.data.log;
bundler_ptr.linker.resolver.log = this.data.log;
}
pub const ProcessFileTask = struct {
resolution: _resolver.Result,
task: ThreadPoolLib.Task = .{ .callback = &callback },
pub fn callback(task: *ThreadPoolLib.Task) void {
var worker = @ptrCast(
*ThreadPool.Worker,
@alignCast(
@alignOf(*ThreadPool.Worker),
ThreadPoolLib.Thread.current.?.ctx.?,
),
);
var process: *ProcessFileTask = @fieldParentPtr(ProcessFileTask, "task", task);
worker.generator.processFile(
worker,
&worker.data.bundler,
process.resolution,
) catch {};
_ = worker.generator.pool.completed_count.fetchAdd(1, .Monotonic);
}
};
};
};
write_lock: Lock,
log_lock: Lock = Lock.init(),
module_list: std.ArrayList(Api.JavascriptBundledModule),
package_list: std.ArrayList(Api.JavascriptBundledPackage),
header_string_buffer: MutableString,
// Just need to know if we've already enqueued this one
package_list_map: std.AutoHashMap(u64, u32),
enqueued_map: std.AutoHashMap(u32, void),
queue: BunQueue,
bundler: *ThisBundler,
allocator: std.mem.Allocator,
tmpfile: std.fs.File,
log: *logger.Log,
pool: *ThreadPool,
tmpfile_byte_offset: u32 = 0,
code_end_byte_offset: u32 = 0,
has_jsx: bool = false,
estimated_input_lines_of_code: usize = 0,
work_waiter: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0),
list_lock: Lock = Lock.init(),
dynamic_import_file_size_store: U32Map,
dynamic_import_file_size_store_lock: Lock,
always_bundled_package_hashes: []u32 = &[_]u32{},
always_bundled_package_jsons: []*const PackageJSON = &.{},
always_bundled_booleans: []bool = &.{},
package_bundle_map: options.BundlePackage.Map = options.BundlePackage.Map{},
const U32Map = std.AutoHashMap(u32, u32);
pub const current_version: u32 = 1;
const dist_index_js_string_pointer = Api.StringPointer{ .length = "dist/index.js".len };
const index_js_string_pointer = Api.StringPointer{ .length = "index.js".len, .offset = "dist/".len };
fn upsert(this: *GenerateNodeModuleBundle, module_id: u32, resolve: _resolver.Result) !void {
var dedupe = try this.enqueued_map.getOrPut(module_id);
if (dedupe.found_existing) return;
var task = try this.allocator.create(ThreadPool.Worker.ProcessFileTask);
task.* = ThreadPool.Worker.ProcessFileTask{
.resolution = resolve,
};
_ = this.pool.pending_count.fetchAdd(1, .Monotonic);
this.pool.pool.schedule(ThreadPoolLib.Batch.from(&task.task));
}
pub fn ensurePathIsAllocated(this: *GenerateNodeModuleBundle, path_: ?*Fs.Path) !void {
var path = path_ orelse return;
const loader = this.bundler.options.loaders.get(path.name.ext) orelse .file;
if (!loader.isJavaScriptLikeOrJSON()) return;
path.* = try path.dupeAlloc(this.allocator);
}
pub fn enqueueItem(this: *GenerateNodeModuleBundle, resolve: _resolver.Result) !void {
var result = resolve;
var path = result.path() orelse return;
const loader = this.bundler.options.loaders.get(path.name.ext) orelse .file;
if (!loader.isJavaScriptLikeOrJSON()) return;
path.* = try path.dupeAlloc(this.allocator);
if (BundledModuleData.get(this, &result)) |mod| {
try this.upsert(mod.module_id, result);
} else {
try this.upsert(result.hash(this.bundler.fs.top_level_dir, loader), result);
}
}
// The bun Bundle Format
// All the node_modules your app uses in a single compact file with metadata
// A binary JavaScript bundle format prioritizing generation time and deserialization time
pub const magic_bytes = "#!/usr/bin/env bun\n\n";
// This makes it possible to do ./path-to-bundle on posix systems so you can see the raw JS contents
// https://en.wikipedia.org/wiki/Magic_number_(programming)#In_files
// Immediately after the magic bytes, the next character is a uint32 followed by a newline
// 0x00000000\n
// That uint32 denotes the byte offset in the file where the code for the bundle ends
// - If the value is 0, that means the file did not finish writing or there are no modules
// - This imposes a maximum bundle size of around 4,294,967,295 bytes. If your JS is more than 4 GB, it won't work.
// The raw JavaScript is encoded as a UTF-8 string starting from the current position + 1 until the above byte offset.
// This uint32 is useful for HTTP servers to separate:
// - Which part of the bundle is the JS code?
// - Which part is the metadata?
// Without needing to do a full pass through the file, or necessarily care about the metadata.
// The metadata is at the bottom of the file instead of the top because the metadata is written after all JS code in the bundle is written.
// The rationale there is:
// 1. We cannot prepend to a file without rewriting the entire file
// 2. The metadata is variable-length and that format will change often.
// 3. We won't have all the metadata until after all JS is finished writing
// If you have 32 MB of JavaScript dependencies, you really want to avoid reading the code in memory.
// - This lets you seek to the specific position in the file.
// - HTTP servers should use sendfile() instead of copying the file to userspace memory.
// So instead, we append metadata to the file after printing each node_module
// When there are no more modules to process, we generate the metadata
// To find the metadata, you look at the byte offset: initial_header[magic_bytes.len..initial_header.len - 1]
// Then, you add that number to initial_header.len
const initial_header = brk: {
var buf = std.mem.zeroes([magic_bytes.len + 5]u8);
// bun.copy(u8, &buf, magic_bytes);
// var remainder = buf[magic_bytes.len..];
// // Write an invalid byte offset to be updated after we finish generating the code
// std.mem.writeIntNative(u32, remainder[0 .. remainder.len - 1], 0);
// buf[buf.len - 1] = '\n';
break :brk buf;
};
const code_start_byte_offset: u32 = initial_header.len;
// The specifics of the metadata is not documented here. You can find it in src/api/schema.peechy.
pub fn appendHeaderString(generator: *GenerateNodeModuleBundle, str: string) !Api.StringPointer {
// This is so common we might as well just reuse it
// Plus this is one machine word so it's a quick comparison
if (strings.eqlComptime(str, "index.js")) {
return index_js_string_pointer;
} else if (strings.eqlComptime(str, "dist/index.js")) {
return dist_index_js_string_pointer;
}
var offset = generator.header_string_buffer.list.items.len;
try generator.header_string_buffer.append(str);
return Api.StringPointer{
.offset = @truncate(u32, offset),
.length = @truncate(u32, str.len),
};
}
pub fn generate(
bundler: *ThisBundler,
allocator: std.mem.Allocator,
framework_config: ?Api.LoadedFramework,
route_config: ?Api.LoadedRouteConfig,
destination: [*:0]const u8,
estimated_input_lines_of_code: *usize,
package_bundle_map: options.BundlePackage.Map,
) !?Api.JavascriptBundleContainer {
_ = try bundler.fs.fs.openTmpDir();
var tmpname_buf: [64]u8 = undefined;
bundler.resetStore();
try bundler.configureDefines();
const tmpname = try bundler.fs.tmpname(
".bun",
tmpname_buf[0..64],
std.hash.Wyhash.hash(@intCast(usize, std.time.milliTimestamp()) % std.math.maxInt(u32), std.mem.span(destination)),
);
var tmpfile = Fs.FileSystem.RealFS.Tmpfile{};
try tmpfile.create(&bundler.fs.fs, tmpname);
errdefer tmpfile.closeAndDelete(tmpname);
var generator = try allocator.create(GenerateNodeModuleBundle);
var queue = BunQueue.init(allocator);
defer allocator.destroy(generator);
generator.* = GenerateNodeModuleBundle{
.module_list = std.ArrayList(Api.JavascriptBundledModule).init(allocator),
.package_list = std.ArrayList(Api.JavascriptBundledPackage).init(allocator),
.header_string_buffer = try MutableString.init(allocator, "dist/index.js".len),
.allocator = allocator,
.enqueued_map = std.AutoHashMap(u32, void).init(allocator),
.queue = queue,
.estimated_input_lines_of_code = 0,
// .resolve_queue = queue,
.bundler = bundler,
.tmpfile = tmpfile.file(),
.dynamic_import_file_size_store = U32Map.init(allocator),
.dynamic_import_file_size_store_lock = Lock.init(),
.log = bundler.log,
.package_list_map = std.AutoHashMap(u64, u32).init(allocator),
.pool = undefined,
.write_lock = Lock.init(),
.package_bundle_map = package_bundle_map,
};
// dist/index.js appears more common than /index.js
// but this means we can store both "dist/index.js" and "index.js" in one.
try generator.header_string_buffer.append("dist/index.js");
try generator.package_list_map.ensureTotalCapacity(128);
var pool = try allocator.create(ThreadPool);
pool.* = ThreadPool{};
generator.pool = pool;
var this = generator;
// Always inline the runtime into the bundle
try generator.appendBytes(&initial_header);
if (bundler.log.level == .verbose) {
bundler.resolver.debug_logs = try DebugLogs.init(allocator);
}
Analytics.Features.bun_bun = true;
always_bundled: {
const root_package_json_resolved: _resolver.Result = bundler.resolver.resolve(bundler.fs.top_level_dir, "./package.json", .stmt) catch {
generator.log.addWarning(null, logger.Loc.Empty, "Please run `bun bun` from a directory containing a package.json.") catch unreachable;
break :always_bundled;
};
const root_package_json = root_package_json_resolved.package_json orelse brk: {
const read_dir = (bundler.resolver.readDirInfo(bundler.fs.top_level_dir) catch unreachable).?;
Analytics.Features.tsconfig = Analytics.Features.tsconfig or read_dir.tsconfig_json != null;
break :brk read_dir.package_json.?;
};
Analytics.setProjectID(std.fs.path.dirname(root_package_json.source.path.text) orelse "/", root_package_json.name);
if (bundler.macro_context) |macro_ctx| {
Analytics.Features.macros = macro_ctx.remap.count() > 0;
}
const bundle_keys = package_bundle_map.keys();
const do_always_bundle = package_bundle_map.values();
var always_bundle_count: u32 = @truncate(u32, bundle_keys.len);
if (always_bundle_count != 0) {
Analytics.Features.always_bundle = true;
var always_bundled_package_jsons = bundler.allocator.alloc(*PackageJSON, always_bundle_count) catch unreachable;
var always_bundled_package_hashes = bundler.allocator.alloc(u32, always_bundle_count) catch unreachable;
var always_bundled_booleans = bundler.allocator.alloc(bool, always_bundle_count) catch unreachable;
var i: u16 = 0;
inner: for (bundle_keys, 0..) |name, k| {
bun.copy(u8, &Bundler.tmp_buildfile_buf, name);
bun.copy(u8, Bundler.tmp_buildfile_buf[name.len..], "/package.json");
const package_json_import = Bundler.tmp_buildfile_buf[0 .. name.len + "/package.json".len];
const result = bundler.resolver.resolve(bundler.fs.top_level_dir, package_json_import, .stmt) catch |err| {
generator.log.addErrorFmt(null, logger.Loc.Empty, bundler.allocator, "{s} resolving always bundled module \"{s}\"", .{ @errorName(err), name }) catch unreachable;
continue :inner;
};
var package_json: *PackageJSON = result.package_json orelse brk: {
const read_dir = (bundler.resolver.readDirInfo(package_json_import) catch unreachable).?;
if (read_dir.package_json == null) {
generator.log.addWarningFmt(null, logger.Loc.Empty, bundler.allocator, "{s} missing package.json. It will not be bundled", .{name}) catch unreachable;
continue :inner;
}
break :brk read_dir.package_json.?;
};
package_json.source.key_path = result.path_pair.primary;
// if (!strings.contains(result.path_pair.primary.text, package_json.name)) {
// generator.log.addErrorFmt(
// null,
// logger.Loc.Empty,
// bundler.allocator,
// "Bundling \"{s}\" is not supported because the package isn.\n To fix this, move the package's code to a directory containing the name.\n Location: \"{s}\"",
// .{
// name,
// name,
// result.path_pair.primary.text,
// },
// ) catch unreachable;
// continue :inner;
// }
always_bundled_package_jsons[i] = package_json;
always_bundled_package_hashes[i] = package_json.hash;
always_bundled_booleans[i] = do_always_bundle[k] == .always;
i += 1;
}
generator.always_bundled_package_hashes = always_bundled_package_hashes[0..i];
generator.always_bundled_package_jsons = always_bundled_package_jsons[0..i];
generator.always_bundled_booleans = always_bundled_booleans[0..i];
}
}
if (generator.log.errors > 0) return error.BundleFailed;
this.bundler.macro_context = js_ast.Macro.MacroContext.init(bundler);
const include_refresh_runtime =
!this.bundler.options.production and
this.bundler.options.jsx.supports_fast_refresh and
bundler.options.platform.isWebLike();
if (framework_config != null) {
defer this.bundler.resetStore();
try this.bundler.configureFramework(true);
if (bundler.options.framework) |framework| {
Analytics.Features.framework = true;
if (framework.override_modules.keys.len > 0) {
bundler.options.framework.?.override_modules_hashes = allocator.alloc(u64, framework.override_modules.keys.len) catch unreachable;
for (framework.override_modules.keys, 0..) |key, i| {
bundler.options.framework.?.override_modules_hashes[i] = std.hash.Wyhash.hash(0, key);
}
}
}
} else {}
this.pool.start(this) catch |err| {
Analytics.enqueue(Analytics.EventName.bundle_fail);
return err;
};
// The ordering matters here The runtime must appear at the top of
// the file But, we don't know which version of the runtime is
// necessary until we know if they'll use JSX and if they'll use
// react refresh
var _new_jsx_runtime_resolve_result: ?_resolver.Result = null;
var fast_refresh_resolve_result: ?_resolver.Result = null;
// Normally, this is automatic
// However, since we only do the parsing pass, it may not get imported automatically.
if (bundler.options.jsx.parse) {
defer this.bundler.resetStore();
if (this.bundler.resolver.resolve(
this.bundler.fs.top_level_dir,
this.bundler.options.jsx.import_source,
.require,
)) |new_jsx_runtime| {
_new_jsx_runtime_resolve_result = new_jsx_runtime;
this.ensurePathIsAllocated(_new_jsx_runtime_resolve_result.?.path()) catch unreachable;
Analytics.Features.jsx = true;
} else |_| {}
}
const include_fast_refresh_in_bundle = Analytics.Features.jsx and
include_refresh_runtime and
!Analytics.Features.fast_refresh and !bundler.options.platform.isServerSide();
var refresh_runtime_module_id: u32 = 0;
if (include_refresh_runtime) {
defer this.bundler.resetStore();
if (this.bundler.resolver.resolve(
this.bundler.fs.top_level_dir,
this.bundler.options.jsx.refresh_runtime,
.require,
)) |refresh_runtime| {
fast_refresh_resolve_result = refresh_runtime;
this.ensurePathIsAllocated(fast_refresh_resolve_result.?.path()) catch unreachable;
Analytics.Features.fast_refresh = true;
if (BundledModuleData.get(this, &refresh_runtime)) |mod| {
refresh_runtime_module_id = mod.module_id;
}
} else |_| {}
}
if (Environment.isDebug) {
switch (bundler.options.platform) {
.node => try generator.appendBytes(runtime.Runtime.sourceContentNode()),
.bun_macro, .bun => try generator.appendBytes(runtime.Runtime.sourceContentBun()),
else => try generator.appendBytes(runtime.Runtime.sourceContent(include_fast_refresh_in_bundle)),
}
try generator.appendBytes("\n\n");
} else if (include_fast_refresh_in_bundle) {
try generator.appendBytes(comptime runtime.Runtime.sourceContent(true) ++ "\n\n");
} else {
try generator.appendBytes(
switch (bundler.options.platform) {
.bun_macro, .bun => comptime @as(string, runtime.Runtime.sourceContentBun() ++ "\n\n"),
.node => comptime @as(string, runtime.Runtime.sourceContentNode() ++ "\n\n"),
else => comptime @as(string, runtime.Runtime.sourceContentWithoutRefresh() ++ "\n\n"),
},
);
}
if (_new_jsx_runtime_resolve_result) |new_jsx_runtime| {
try this.enqueueItem(new_jsx_runtime);
_new_jsx_runtime_resolve_result = null;
}
if (fast_refresh_resolve_result) |fast_refresh| {
try this.enqueueItem(fast_refresh);
fast_refresh_resolve_result = null;
}
if (bundler.router) |router| {
defer this.bundler.resetStore();
Analytics.Features.filesystem_router = true;
const entry_points = try router.getEntryPoints();
for (entry_points) |entry_point| {
const resolved = bundler.resolveEntryPoint(entry_point) catch continue;
try this.enqueueItem(resolved);
}
this.bundler.resetStore();
} else {}
if (bundler.options.framework) |framework| {
if (bundler.options.platform.isBun()) {
if (framework.server.isEnabled()) {
Analytics.Features.bunjs = true;
const resolved = try bundler.resolver.resolve(
bundler.fs.top_level_dir,
framework.server.path,
.entry_point,
);
try this.enqueueItem(resolved);
}
} else {
if (framework.client.isEnabled()) {
const resolved = try bundler.resolver.resolve(
bundler.fs.top_level_dir,
framework.client.path,
.entry_point,
);
try this.enqueueItem(resolved);
}
if (framework.fallback.isEnabled()) {
const resolved = try bundler.resolver.resolve(
bundler.fs.top_level_dir,
framework.fallback.path,
.entry_point,
);
try this.enqueueItem(resolved);
}
}
}
for (bundler.options.entry_points) |entry_point| {
defer this.bundler.resetStore();
const entry_point_path = bundler.normalizeEntryPointPath(entry_point);
const resolved = bundler.resolveEntryPoint(entry_point_path) catch continue;
try this.enqueueItem(resolved);
}
Analytics.enqueue(Analytics.EventName.bundle_start);
this.bundler.resetStore();
this.pool.wait(this) catch |err| {
Analytics.enqueue(Analytics.EventName.bundle_fail);
return err;
};
Analytics.enqueue(Analytics.EventName.bundle_success);
estimated_input_lines_of_code.* = generator.estimated_input_lines_of_code;
// if (comptime !isRelease) {
// this.queue.checkDuplicatesSlow();
// }
if (this.log.errors > 0) {
tmpfile.closeAndDelete(tmpname);
// We stop here because if there are errors we don't know if the bundle is valid
// This manifests as a crash when sorting through the module list because we may have added files to the bundle which were never actually finished being added.
return null;
}
if (this.module_list.items.len == 0) {
tmpfile.closeAndDelete(tmpname);
Output.prettyErrorln(
\\<r><red>error<r>: no dependencies to bundle!
\\
\\"bun bun" currently only bundles dependencies in node_modules.
\\
,
.{},
);
Global.crash();
}
if (include_refresh_runtime and refresh_runtime_module_id > 0) {
var refresh_runtime_injector_buf: [1024]u8 = undefined;
var fixed_buffer = std.io.fixedBufferStream(&refresh_runtime_injector_buf);
var fixed_buffer_writer = fixed_buffer.writer();
const hex_bytes = bun.fmt.hexIntLower(refresh_runtime_module_id);
fixed_buffer_writer.print(
\\if ('window' in globalThis) {{
\\ (function() {{
\\ BUN_RUNTIME.__injectFastRefresh(${any}());
\\ }})();
\\}}
,
.{hex_bytes},
) catch unreachable;
try this.tmpfile.writeAll(fixed_buffer.buffer[0..fixed_buffer.pos]);
}
// Ensure we never overflow
this.code_end_byte_offset = @truncate(
u32,
// Doing this math ourself seems to not necessarily produce correct results
(try this.tmpfile.getPos()),
);
var javascript_bundle_container = std.mem.zeroes(Api.JavascriptBundleContainer);
std.sort.sort(
Api.JavascriptBundledModule,
this.module_list.items,
this,
GenerateNodeModuleBundle.sortJavascriptModuleByPath,
);
if (comptime Environment.isDebug) {
const SeenHash = std.AutoHashMap(u64, void);
var map = SeenHash.init(this.allocator);
var ids = SeenHash.init(this.allocator);
try map.ensureTotalCapacity(@truncate(u32, this.module_list.items.len));
try ids.ensureTotalCapacity(@truncate(u32, this.module_list.items.len));
for (this.module_list.items) |a| {
const a_pkg: Api.JavascriptBundledPackage = this.package_list.items[a.package_id];
const a_name = this.metadataStringPointer(a_pkg.name);
const a_version = this.metadataStringPointer(a_pkg.version);
const a_path = this.metadataStringPointer(a.path);
std.debug.assert(a_name.len > 0);
std.debug.assert(a_version.len > 0);
std.debug.assert(a_path.len > 0);
var hash_print = std.mem.zeroes([4096]u8);
const hash = std.hash.Wyhash.hash(0, std.fmt.bufPrint(&hash_print, "{s}@{s}/{s}", .{ a_name, a_version, a_path }) catch unreachable);
var result1 = map.getOrPutAssumeCapacity(hash);
std.debug.assert(!result1.found_existing);
var result2 = ids.getOrPutAssumeCapacity(a.id);
std.debug.assert(!result2.found_existing);
}
}
var hasher = std.hash.Wyhash.init(0);
// We want to sort the packages as well as the files
// The modules sort the packages already
// So can just copy it in the below loop.
var sorted_package_list = try allocator.alloc(Api.JavascriptBundledPackage, this.package_list.items.len);
// At this point, the module_list is sorted.
if (this.module_list.items.len > 0) {
var package_id_i: u32 = 0;
var i: usize = 0;
// Assumption: node_modules are immutable
// Assumption: module files are immutable
// (They're not. But, for our purposes that's okay)
// The etag is:
// - The hash of each module's path in sorted order
// - The hash of each module's code size in sorted order
// - hash(hash(package_name, package_version))
// If this doesn't prove strong enough, we will do a proper content hash
// But I want to avoid that overhead unless proven necessary.
// There's a good chance we don't even strictly need an etag here.
var bytes: [4]u8 = undefined;
while (i < this.module_list.items.len) {
var current_package_id = this.module_list.items[i].package_id;
this.module_list.items[i].package_id = package_id_i;
var offset = @truncate(u32, i);
i += 1;
while (i < this.module_list.items.len and this.module_list.items[i].package_id == current_package_id) : (i += 1) {
this.module_list.items[i].package_id = package_id_i;
// Hash the file path
hasher.update(this.metadataStringPointer(this.module_list.items[i].path));
// Then the length of the code
std.mem.writeIntNative(u32, &bytes, this.module_list.items[i].code.length);
hasher.update(&bytes);
}
this.package_list.items[current_package_id].modules_offset = offset;
this.package_list.items[current_package_id].modules_length = @truncate(u32, i) - offset;
// Hash the hash of the package name
// it's hash(hash(package_name, package_version))
std.mem.writeIntNative(u32, &bytes, this.package_list.items[current_package_id].hash);
hasher.update(&bytes);
sorted_package_list[package_id_i] = this.package_list.items[current_package_id];
package_id_i += 1;
}
}
var javascript_bundle = std.mem.zeroes(Api.JavascriptBundle);
javascript_bundle.modules = this.module_list.items;
javascript_bundle.packages = sorted_package_list;
javascript_bundle.manifest_string = this.header_string_buffer.list.items;
const etag_u64 = hasher.final();
// We store the etag as a ascii hex encoded u64
// This is so we can send the bytes directly in the HTTP server instead of formatting it as hex each time.
javascript_bundle.etag = try std.fmt.allocPrint(allocator, "{any}", .{bun.fmt.hexIntLower(etag_u64)});
javascript_bundle.generated_at = @truncate(u32, @intCast(u64, std.time.milliTimestamp()));
const basename = std.fs.path.basename(std.mem.span(destination));
const extname = std.fs.path.extension(basename);
javascript_bundle.import_from_name = if (bundler.options.platform.isBun())
"/node_modules.server.bun"
else
try std.fmt.allocPrint(
this.allocator,
"/{s}.{s}.bun",
.{
basename[0 .. basename.len - extname.len],
javascript_bundle.etag,
},
);
javascript_bundle_container.bundle_format_version = current_version;
javascript_bundle_container.bundle = javascript_bundle;
javascript_bundle_container.code_length = this.code_end_byte_offset;
javascript_bundle_container.framework = framework_config;
javascript_bundle_container.routes = route_config;
var start_pos = try this.tmpfile.getPos();
var tmpwriter = std.io.bufferedWriter(this.tmpfile.writer());
const SchemaWriter = schema.Writer(@TypeOf(tmpwriter.writer()));
var schema_file_writer = SchemaWriter.init(tmpwriter.writer());
try javascript_bundle_container.encode(&schema_file_writer);
try tmpwriter.flush();
// sanity check
if (Environment.isDebug) {
try this.tmpfile.seekTo(start_pos);
var contents = try allocator.alloc(u8, (try this.tmpfile.getEndPos()) - start_pos);
var read_bytes = try this.tmpfile.read(contents);
var buf = contents[0..read_bytes];
var reader = schema.Reader.init(buf, allocator);
var decoder = try Api.JavascriptBundleContainer.decode(
&reader,
);
std.debug.assert(decoder.code_length.? == javascript_bundle_container.code_length.?);
}
var code_length_bytes: [4]u8 = undefined;
std.mem.writeIntNative(u32, &code_length_bytes, this.code_end_byte_offset);
_ = try std.os.pwrite(this.tmpfile.handle, &code_length_bytes, magic_bytes.len);
// Without his mutex, we get a crash at this location:
// try std.os.renameat(tmpdir.fd, tmpname, top_dir.fd, destination);
// ^
const top_dir = try std.fs.openDirAbsolute(Fs.FileSystem.instance.top_level_dir, .{});
_ = C.fchmod(
this.tmpfile.handle,
// chmod 777
0o0000010 | 0o0000100 | 0o0000001 | 0o0001000 | 0o0000040 | 0o0000004 | 0o0000002 | 0o0000400 | 0o0000200 | 0o0000020,
);
try tmpfile.promote(tmpname, top_dir.fd, destination);
// Print any errors at the end
// try this.log.print(Output.errorWriter());
return javascript_bundle_container;
}
pub fn metadataStringPointer(this: *GenerateNodeModuleBundle, ptr: Api.StringPointer) string {
return this.header_string_buffer.list.items[ptr.offset .. ptr.offset + ptr.length];
}
// Since we trim the prefixes, we must also compare the package name and version
pub fn sortJavascriptModuleByPath(ctx: *GenerateNodeModuleBundle, a: Api.JavascriptBundledModule, b: Api.JavascriptBundledModule) bool {
return switch (std.mem.order(
u8,
ctx.metadataStringPointer(
ctx.package_list.items[a.package_id].name,
),
ctx.metadataStringPointer(
ctx.package_list.items[b.package_id].name,
),
)) {
.eq => switch (std.mem.order(
u8,
ctx.metadataStringPointer(
ctx.package_list.items[a.package_id].version,
),
ctx.metadataStringPointer(
ctx.package_list.items[b.package_id].version,
),
)) {
.eq => std.mem.order(
u8,
ctx.metadataStringPointer(a.path),
ctx.metadataStringPointer(b.path),
) == .lt,
.lt => true,
else => false,
},
.lt => true,
else => false,
};
}
// pub fn sortJavascriptPackageByName(ctx: *GenerateNodeModuleBundle, a: Api.JavascriptBundledPackage, b: Api.JavascriptBundledPackage) bool {
// return std.mem.order(u8, ctx.metadataStringPointer(a.name), ctx.metadataStringPointer(b.name)) == .lt;
// }
pub fn appendBytes(generator: *GenerateNodeModuleBundle, bytes: anytype) !void {
try generator.tmpfile.writeAll(bytes);
generator.tmpfile_byte_offset += @truncate(u32, bytes.len);
}
const BundledModuleData = struct {
import_path: string,
package_path: string,
package: *const PackageJSON,
module_id: u32,
pub fn getForceBundle(this: *GenerateNodeModuleBundle, resolve_result: *const _resolver.Result) ?BundledModuleData {
return _get(this, resolve_result, true, false);
}
pub fn getForceBundleForMain(this: *GenerateNodeModuleBundle, resolve_result: *const _resolver.Result) ?BundledModuleData {
return _get(this, resolve_result, true, true);
}
threadlocal var normalized_package_path: [512]u8 = undefined;
threadlocal var normalized_package_path2: [512]u8 = undefined;
inline fn _get(this: *GenerateNodeModuleBundle, resolve_result: *const _resolver.Result, comptime force: bool, comptime is_main: bool) ?BundledModuleData {
const path = resolve_result.pathConst() orelse return null;
if (strings.eqlComptime(path.namespace, "node")) {
const _import_path = path.text["/bun-vfs/node_modules/".len..][resolve_result.package_json.?.name.len + 1 ..];
return BundledModuleData{
.import_path = _import_path,
.package_path = path.text["/bun-vfs/node_modules/".len..],
.package = resolve_result.package_json.?,
.module_id = resolve_result.package_json.?.hashModule(_import_path),
};
}
var import_path = path.text;
var package_path = path.text;
var file_path = path.text;
if (resolve_result.package_json) |pkg_| {
var pkg: *const PackageJSON = pkg_;
if (this.package_bundle_map.get(pkg.name)) |result| {
if (result == .never) return null;
}
if (std.mem.indexOfScalar(u32, this.always_bundled_package_hashes, pkg.hash)) |pkg_i| {
pkg = this.always_bundled_package_jsons[pkg_i];
if (!this.always_bundled_booleans[pkg_i]) return null;
const key_path_source_dir = pkg.source.key_path.sourceDir();
const default_source_dir = pkg.source.path.sourceDir();
if (strings.startsWith(path.text, key_path_source_dir)) {
import_path = path.text[key_path_source_dir.len..];
} else if (strings.startsWith(path.text, default_source_dir)) {
import_path = path.text[default_source_dir.len..];
} else if (strings.startsWith(path.pretty, pkg.name)) {
import_path = path.pretty[pkg.name.len + 1 ..];
}
var buf_to_use: []u8 = if (is_main) &normalized_package_path2 else &normalized_package_path;
bun.copy(u8, buf_to_use, pkg.name);
buf_to_use[pkg.name.len] = '/';
bun.copy(u8, buf_to_use[pkg.name.len + 1 ..], import_path);
package_path = buf_to_use[0 .. pkg.name.len + import_path.len + 1];
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = pkg,
.module_id = pkg.hashModule(package_path),
};
}
}
const root: _resolver.RootPathPair = this.bundler.resolver.rootNodeModulePackageJSON(
resolve_result,
) orelse return null;
var base_path = root.base_path;
const package_json = root.package_json;
if (std.mem.indexOfScalar(u32, this.always_bundled_package_hashes, package_json.hash)) |pkg_i| {
var pkg = this.always_bundled_package_jsons[pkg_i];
if (!this.always_bundled_booleans[pkg_i]) return null;
const key_path_source_dir = pkg.source.key_path.sourceDir();
const default_source_dir = pkg.source.path.sourceDir();
if (strings.startsWith(path.text, key_path_source_dir)) {
import_path = path.text[key_path_source_dir.len..];
} else if (strings.startsWith(path.text, default_source_dir)) {
import_path = path.text[default_source_dir.len..];
} else if (strings.startsWith(path.pretty, pkg.name)) {
import_path = path.pretty[pkg.name.len + 1 ..];
}
var buf_to_use: []u8 = if (is_main) &normalized_package_path2 else &normalized_package_path;
bun.copy(u8, buf_to_use, pkg.name);
buf_to_use[pkg.name.len] = '/';
bun.copy(u8, buf_to_use[pkg.name.len + 1 ..], import_path);
package_path = buf_to_use[0 .. pkg.name.len + import_path.len + 1];
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = pkg,
.module_id = pkg.hashModule(package_path),
};
}
// Easymode: the file path doesn't need to be remapped.
if (strings.startsWith(file_path, base_path)) {
import_path = std.mem.trimLeft(u8, path.text[base_path.len..], "/");
package_path = std.mem.trim(u8, path.text[base_path.len - package_json.name.len - 1 ..], "/");
std.debug.assert(import_path.len > 0);
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = package_json,
.module_id = package_json.hashModule(package_path),
};
}
if (std.mem.lastIndexOf(u8, file_path, package_json.name)) |i| {
package_path = file_path[i..];
import_path = package_path[package_json.name.len + 1 ..];
std.debug.assert(import_path.len > 0);
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = package_json,
.module_id = package_json.hashModule(package_path),
};
}
if (comptime force) {
if (std.mem.indexOfScalar(u32, this.always_bundled_package_hashes, root.package_json.hash)) |pkg_json_i| {
const pkg_json = this.always_bundled_package_jsons[pkg_json_i];
base_path = pkg_json.source.key_path.sourceDir();
if (strings.startsWith(file_path, base_path)) {
import_path = std.mem.trimLeft(u8, path.text[base_path.len..], "/");
package_path = std.mem.trim(u8, path.text[base_path.len - package_json.name.len - 1 ..], "/");
std.debug.assert(import_path.len > 0);
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = package_json,
.module_id = package_json.hashModule(package_path),
};
}
if (std.mem.lastIndexOf(u8, file_path, package_json.name)) |i| {
package_path = file_path[i..];
import_path = package_path[package_json.name.len + 1 ..];
std.debug.assert(import_path.len > 0);
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = package_json,
.module_id = package_json.hashModule(package_path),
};
}
// This is our last resort.
// The package is supposed to be bundled
// package.json says its' in packages/@foo/bar/index.js
// The file really is in packages/bar/index.js
// But we need the import path to contain the package path for bundling to work
// so we fake it
// we say ""
if (package_json.name[0] == '@') {
if (std.mem.indexOfScalar(u8, package_json.name, '/')) |at| {
const package_subpath = package_json.name[at + 1 ..];
if (std.mem.lastIndexOf(u8, file_path, package_subpath)) |i| {
package_path = this.bundler.fs.dirname_store.print("{s}/{s}", .{ package_json.name, file_path[i + package_subpath.len ..] }) catch unreachable;
import_path = package_path[package_json.name.len + 1 ..];
return BundledModuleData{
.import_path = import_path,
.package_path = package_path,
.package = package_json,
.module_id = package_json.hashModule(package_path),
};
}
}
}
}
}
return null;
}
pub fn get(this: *GenerateNodeModuleBundle, resolve_result: *const _resolver.Result) ?BundledModuleData {
return _get(this, resolve_result, false, false);
}
};
fn writeEmptyModule(this: *GenerateNodeModuleBundle, package_relative_path: string, module_id: u32) !u32 {
this.write_lock.lock();
defer this.write_lock.unlock();
var code_offset = @truncate(u32, try this.tmpfile.getPos());
var writer = this.tmpfile.writer();
var buffered = std.io.bufferedWriter(writer);
var bufwriter = buffered.writer();
try bufwriter.writeAll("// ");
try bufwriter.writeAll(package_relative_path);
try bufwriter.writeAll(" (disabled/empty)\nexport var $");
std.fmt.formatInt(module_id, 16, .lower, .{}, bufwriter) catch unreachable;
try bufwriter.writeAll(" = () => { var obj = {}; Object.defineProperty(obj, 'default', { value: obj, enumerable: false, configurable: true }, obj); return obj; }; \n");
try buffered.flush();
this.tmpfile_byte_offset = @truncate(u32, try this.tmpfile.getPos());
return code_offset;
}
fn processImportRecord(_: *GenerateNodeModuleBundle, _: ImportRecord) !void {}
var json_ast_symbols = [_]js_ast.Symbol{
js_ast.Symbol{ .original_name = "$$m" },
js_ast.Symbol{ .original_name = "exports" },
js_ast.Symbol{ .original_name = "module" },
js_ast.Symbol{ .original_name = "CONGRATS_YOU_FOUND_A_BUG" },
js_ast.Symbol{ .original_name = "$$bun_runtime_json_parse" },
};
const json_parse_string = "parse";
threadlocal var override_file_path_buf: [bun.MAX_PATH_BYTES]u8 = undefined;
pub fn appendToModuleList(
this: *GenerateNodeModuleBundle,
package: *const PackageJSON,
module_id: u32,
code_offset: u32,
package_relative_path: string,
) !void {
this.list_lock.lock();
defer this.list_lock.unlock();
const code_length = @atomicLoad(u32, &this.tmpfile_byte_offset, .SeqCst) - code_offset;
if (comptime Environment.isDebug) {
std.debug.assert(code_length > 0);
std.debug.assert(package.hash != 0);
std.debug.assert(package.version.len > 0);
std.debug.assert(package.name.len > 0);
std.debug.assert(module_id > 0);
}
var package_get_or_put_entry = try this.package_list_map.getOrPut(package.hash);
if (!package_get_or_put_entry.found_existing) {
package_get_or_put_entry.value_ptr.* = @truncate(u32, this.package_list.items.len);
try this.package_list.append(
Api.JavascriptBundledPackage{
.name = try this.appendHeaderString(package.name),
.version = try this.appendHeaderString(package.version),
.hash = package.hash,
},
);
this.has_jsx = this.has_jsx or strings.eql(package.name, this.bundler.options.jsx.package_name);
}
var path_extname_length = @truncate(u8, std.fs.path.extension(package_relative_path).len);
try this.module_list.append(
Api.JavascriptBundledModule{
.path = try this.appendHeaderString(
package_relative_path,
),
.path_extname_length = path_extname_length,
.package_id = package_get_or_put_entry.value_ptr.*,
.id = module_id,
.code = Api.StringPointer{
.length = @truncate(u32, code_length),
.offset = @truncate(u32, code_offset),
},
},
);
}
threadlocal var json_e_string: js_ast.E.String = undefined;
threadlocal var json_e_call: js_ast.E.Call = undefined;
threadlocal var json_e_identifier: js_ast.E.Identifier = undefined;
threadlocal var json_call_args: [1]js_ast.Expr = undefined;
const PendingImports = std.AutoArrayHashMap(u32, ThreadPool.Worker.ProcessFileTask);
pub fn processFile(this: *GenerateNodeModuleBundle, worker: *ThreadPool.Worker, bundler: *Bundler, _resolve: _resolver.Result) !void {
const resolve = _resolve;
if (resolve.is_external) return;
var shared_buffer = &worker.data.shared_buffer;
var scan_pass_result = &worker.data.scan_pass_result;
var file_path = (resolve.pathConst() orelse unreachable).*;
var add_to_bundle = brk: {
if (resolve.package_json) |package_json| {
if (this.package_bundle_map.get(package_json.name)) |result| {
break :brk result == .always;
}
}
break :brk resolve.isLikelyNodeModule();
};
const source_dir = file_path.sourceDir();
const loader = bundler.options.loader(file_path.name.ext);
const platform = bundler.options.platform;
defer scan_pass_result.reset();
defer shared_buffer.reset();
defer this.bundler.resetStore();
var log = worker.data.log;
var queue = PendingImports.init(worker.allocator);
var __module_data: ?BundledModuleData = null;
if (add_to_bundle) {
__module_data = BundledModuleData.getForceBundleForMain(this, &resolve);
}
// If we're in a node_module, build that almost normally
if (add_to_bundle and __module_data != null) {
const module_data = __module_data.?;
var code_offset: u32 = 0;
const module_id = module_data.module_id;
const package = module_data.package;
const package_relative_path = module_data.import_path;
file_path.pretty = module_data.package_path;
const entry: CacheEntry = brk: {
if (this.bundler.options.framework) |framework| {
if (framework.override_modules_hashes.len > 0) {
const package_relative_path_hash = std.hash.Wyhash.hash(0, module_data.package_path);
if (std.mem.indexOfScalar(
u64,
framework.override_modules_hashes,
package_relative_path_hash,
)) |index| {
const relative_path = [_]string{
framework.resolved_dir,
framework.override_modules.values[index],
};
var override_path = this.bundler.fs.absBuf(
&relative_path,
&override_file_path_buf,
);
override_file_path_buf[override_path.len] = 0;
var override_pathZ = override_file_path_buf[0..override_path.len :0];
break :brk try bundler.resolver.caches.fs.readFileShared(
bundler.fs,
override_pathZ,
0,
null,
shared_buffer,
);
}
}
}
if (!strings.eqlComptime(file_path.namespace, "node"))
break :brk try bundler.resolver.caches.fs.readFileShared(
bundler.fs,
file_path.textZ(),
resolve.dirname_fd,
if (resolve.file_fd != 0) resolve.file_fd else null,
shared_buffer,
);
break :brk CacheEntry{
.contents = NodeFallbackModules.contentsFromPath(file_path.text) orelse "",
};
};
var approximate_newline_count: usize = 0;
defer worker.data.estimated_input_lines_of_code += approximate_newline_count;
// Handle empty files
// We can't just ignore them. Sometimes code will try to import it. Often because of TypeScript types.
// So we just say it's an empty object. Empty object mimicks what "browser": false does as well.
// TODO: optimize this so that all the exports for these are done in one line instead of writing repeatedly
if (entry.contents.len == 0 or (entry.contents.len < 33 and strings.trim(entry.contents, " \n\r").len == 0)) {
code_offset = try this.writeEmptyModule(module_data.package_path, module_id);
} else {
var ast: js_ast.Ast = undefined;
const source = logger.Source.initRecycledFile(
Fs.File{
.path = file_path,
.contents = entry.contents,
},
bundler.allocator,
) catch return null;
switch (loader) {
.jsx,
.tsx,
.js,
.ts,
=> {
var jsx = _resolve.jsx;
jsx.parse = loader.isJSX();
var opts = js_parser.Parser.Options.init(jsx, loader);
opts.transform_require_to_import = false;
opts.features.dynamic_require = bundler.options.platform.isBun();
opts.enable_bundling = true;
opts.warn_about_unbundled_modules = false;
opts.macro_context = &worker.data.macro_context;
opts.features.auto_import_jsx = jsx.parse;
opts.features.trim_unused_imports = this.bundler.options.trim_unused_imports orelse loader.isTypeScript();
opts.tree_shaking = this.bundler.options.tree_shaking;
ast = (bundler.resolver.caches.js.parse(
bundler.allocator,
opts,
bundler.options.define,
log,
&source,
) catch null) orelse return;
approximate_newline_count = ast.approximate_newline_count;
if (ast.import_records.len > 0) {
for (ast.import_records) |*import_record| {
// Don't resolve the runtime
if (import_record.is_internal or import_record.is_unused) {
continue;
}
if (bundler.options.platform.isBun()) {
if (JSC.DisabledModule.has(import_record.path.text)) {
import_record.path.is_disabled = true;
import_record.do_commonjs_transform_in_printer = true;
import_record.is_bundled = true;
continue;
}
if (JSC.HardcodedModule.Aliases.get(import_record.path.text)) |remapped| {
import_record.path.text = remapped.path;
import_record.tag = remapped.tag;
if (remapped.tag != .none) {
import_record.is_bundled = false;
continue;
}
}
}
if (bundler.resolver.resolve(source_dir, import_record.path.text, import_record.kind)) |tmp| {
var _resolved_import = tmp;
if (_resolved_import.is_external) {
continue;
}
var path = _resolved_import.path() orelse {
import_record.path.is_disabled = true;
import_record.is_bundled = true;
continue;
};
const loader_ = bundler.options.loader(path.name.ext);
if (!loader_.isJavaScriptLikeOrJSON()) {
import_record.path.is_disabled = true;
import_record.is_bundled = true;
continue;
}
// if (_resolved_import.package_json == null) |pkg_json| {
// _resolved_import.package_json = if (pkg_json.hash == resolve.package_json.?.hash)
// resolve.package_json
// else
// _resolved_import.package_json;
// }
const resolved_import: *const _resolver.Result = &_resolved_import;
const _module_data = BundledModuleData.getForceBundle(this, resolved_import) orelse {
// if a macro imports code that cannot be bundled
// we just silently disable it
// because...we need some kind of hook to say "don't bundle this"
import_record.path.is_disabled = true;
import_record.is_bundled = false;
continue;
};
import_record.module_id = _module_data.module_id;
std.debug.assert(import_record.module_id != 0);
import_record.is_bundled = true;
path.* = try path.dupeAlloc(this.allocator);
import_record.path = path.*;
_ = queue.getOrPutValue(
_module_data.module_id,
.{
.resolution = _resolved_import,
},
) catch unreachable;
} else |err| {
if (comptime Environment.isDebug) {
if (!import_record.handles_import_errors) {
Output.prettyErrorln("\n<r><red>{s}<r> resolving \"{s}\" from \"{s}\"", .{
@errorName(err),
import_record.path.text,
file_path.text,
});
}
}
// Disable failing packages from being printed.
// This may cause broken code to write.
// However, doing this means we tell them all the resolve errors
// Rather than just the first one.
import_record.path.is_disabled = true;
switch (err) {
error.ModuleNotFound => {
const addError = logger.Log.addResolveErrorWithTextDupeMaybeWarn;
if (!import_record.handles_import_errors) {
if (isPackagePath(import_record.path.text)) {
if (platform.isWebLike() and options.ExternalModules.isNodeBuiltin(import_record.path.text)) {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve Node.js builtin: \"{s}\".",
.{import_record.path.text},
import_record.kind,
platform.isBun(),
);
} else {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve: \"{s}\". Maybe you need to \"bun install\"?",
.{import_record.path.text},
import_record.kind,
platform.isBun(),
);
}
} else if (!platform.isBun()) {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve: \"{s}\"",
.{
import_record.path.text,
},
import_record.kind,
platform.isBun(),
);
}
}
},
// assume other errors are already in the log
else => {},
}
}
}
}
},
.json => {
// parse the JSON _only_ to catch errors at build time.
const json_parse_result = json_parser.ParseJSONForBundling(&source, worker.data.log, worker.allocator) catch return;
if (json_parse_result.tag != .empty) {
const expr = brk: {
// If it's an ascii string, we just print it out with a big old JSON.parse()
if (json_parse_result.tag == .ascii) {
json_call_args[0] = js_ast.Expr.init(
js_ast.E.String,
js_ast.E.String{
.data = source.contents,
},
.{ .start = 0 },
);
break :brk js_ast.Expr.init(
js_ast.E.Call,
js_ast.E.Call{
.target = js_ast.Expr{
.data = .{
.e_identifier = js_ast.E.Identifier{
.ref = Ref.atIndex(json_ast_symbols.len - 1),
},
},
.loc = .{ .start = 0 },
},
.args = js_ast.ExprNodeList.init(json_call_args[0..]),
},
.{ .start = 0 },
);
} else {
break :brk json_parse_result.expr;
}
};
var stmt = js_ast.Stmt.alloc(
js_ast.S.ExportDefault,
js_ast.S.ExportDefault{
.value = js_ast.StmtOrExpr{ .expr = expr },
.default_name = js_ast.LocRef{
.loc = .{},
.ref = null,
},
},
.{ .start = 0 },
);
var stmts = worker.allocator.alloc(js_ast.Stmt, 1) catch unreachable;
stmts[0] = stmt;
var parts = worker.allocator.alloc(js_ast.Part, 1) catch unreachable;
parts[0] = js_ast.Part{ .stmts = stmts };
ast = js_ast.Ast.initTest(parts);
ast.runtime_imports = runtime.Runtime.Imports{};
ast.runtime_imports.@"$$m" = .{ .ref = Ref.atIndex(0), .primary = Ref.None, .backup = Ref.None };
ast.runtime_imports.__export = .{ .ref = Ref.atIndex(1), .primary = Ref.None, .backup = Ref.None };
ast.symbols = &json_ast_symbols;
ast.module_ref = Ref.atIndex(2);
ast.exports_ref = ast.runtime_imports.__export.?.ref;
ast.bundle_export_ref = Ref.atIndex(3);
} else {
var parts = &[_]js_ast.Part{};
ast = js_ast.Ast.initTest(parts);
}
},
else => {
return;
},
}
switch (ast.parts.len) {
// It can be empty after parsing too
// A file like this is an example:
// "//# sourceMappingURL=validator.js.map"
0 => {
code_offset = try this.writeEmptyModule(module_data.package_path, module_id);
},
else => {
const register_ref = ast.runtime_imports.@"$$m".?.ref;
const E = js_ast.E;
const Expr = js_ast.Expr;
const Stmt = js_ast.Stmt;
var prepend_part: js_ast.Part = undefined;
var needs_prepend_part = false;
if (ast.parts.len > 1) {
for (ast.parts) |part| {
if (part.tag != .none and part.stmts.len > 0) {
prepend_part = part;
needs_prepend_part = true;
break;
}
}
}
var package_path = js_ast.E.String{ .data = module_data.package_path };
var target_identifier = E.Identifier{ .ref = register_ref };
var module_binding = js_ast.B.Identifier{ .ref = ast.module_ref.? };
var exports_binding = js_ast.B.Identifier{ .ref = ast.exports_ref.? };
var part = &ast.parts[ast.parts.len - 1];
var new_stmts: [1]Stmt = undefined;
var register_args: [1]Expr = undefined;
var cjs_args: [2]js_ast.G.Arg = [_]js_ast.G.Arg{
.{
.binding = .{
.loc = logger.Loc.Empty,
.data = .{ .b_identifier = &module_binding },
},
},
.{
.binding = js_ast.Binding{
.loc = logger.Loc.Empty,
.data = .{ .b_identifier = &exports_binding },
},
},
};
const module_path_str = js_ast.Expr{ .data = .{ .e_string = &package_path }, .loc = logger.Loc.Empty };
var closure = E.Arrow{
.args = &cjs_args,
.body = .{
.loc = logger.Loc.Empty,
.stmts = part.stmts,
},
};
var properties: [1]js_ast.G.Property = [_]js_ast.G.Property{
.{
.key = module_path_str,
.value = Expr{ .loc = logger.Loc.Empty, .data = .{ .e_arrow = &closure } },
},
};
var e_object = E.Object{
.properties = js_ast.G.Property.List.init(&properties),
};
// if (!ast.uses_module_ref) {
// var symbol = &ast.symbols[ast.module_ref.?.innerIndex()];
// symbol.original_name = "_$$";
// }
// $$m(12345, "react", "index.js", function(module, exports) {
// })
var accessor = js_ast.E.Index{ .index = module_path_str, .target = js_ast.Expr{
.data = .{ .e_object = &e_object },
.loc = logger.Loc.Empty,
} };
register_args[0] = Expr{ .loc = logger.Loc.Empty, .data = .{ .e_index = &accessor } };
var call_register = E.Call{
.target = Expr{
.data = .{ .e_identifier = target_identifier },
.loc = logger.Loc{ .start = 0 },
},
.args = js_ast.ExprNodeList.init(&register_args),
};
var register_expr = Expr{ .loc = call_register.target.loc, .data = .{ .e_call = &call_register } };
var decls: [1]js_ast.G.Decl = undefined;
var bundle_export_binding = js_ast.B.Identifier{ .ref = ast.runtime_imports.@"$$m".?.ref };
var binding = js_ast.Binding{
.loc = register_expr.loc,
.data = .{ .b_identifier = &bundle_export_binding },
};
decls[0] = js_ast.G.Decl{
.value = register_expr,
.binding = binding,
};
var export_var = js_ast.S.Local{
.decls = &decls,
.is_export = true,
};
new_stmts[0] = Stmt{ .loc = register_expr.loc, .data = .{ .s_local = &export_var } };
part.stmts = &new_stmts;
var writer = js_printer.NewFileWriter(this.tmpfile);
var symbols: [][]js_ast.Symbol = &([_][]js_ast.Symbol{ast.symbols});
// It should only have one part.
ast.parts = ast.parts[ast.parts.len - 1 ..];
const write_result =
// The difference between these two is `ascii_only`
// We try our best to print UTF-8.
// However, JavaScriptCore does not accept UTF-8.
// It accepts either latin1 characters as unsigned char
// or UTF-16 chars as uint16
// We don't want to add a UTF decoding pass to the .bun files
// because it's potentially 15 MB of code.
// If we store it as UTF-16 directly, then that 15 MB of code becomes 30 MB of code!
// lots of code!
//
if (!bundler.options.platform.isBun())
try js_printer.printCommonJSThreaded(
@TypeOf(writer),
writer,
ast,
js_ast.Symbol.Map.initList(symbols),
&source,
false,
js_printer.Options{
.to_module_ref = Ref.RuntimeRef,
.bundle_export_ref = ast.runtime_imports.@"$$m".?.ref,
.source_path = file_path,
.externals = ast.externals,
.indent = 0,
.require_ref = ast.require_ref,
.module_hash = module_id,
.runtime_imports = ast.runtime_imports,
.prepend_part_value = &prepend_part,
.prepend_part_key = if (needs_prepend_part) closure.body.stmts.ptr else null,
},
Linker,
&bundler.linker,
&this.write_lock,
std.fs.File,
this.tmpfile,
std.fs.File.getPos,
&this.tmpfile_byte_offset,
)
else
try js_printer.printCommonJSThreaded(
@TypeOf(writer),
writer,
ast,
js_ast.Symbol.Map.initList(symbols),
&source,
true,
js_printer.Options{
.to_module_ref = Ref.RuntimeRef,
.bundle_export_ref = ast.runtime_imports.@"$$m".?.ref,
.source_path = file_path,
.externals = ast.externals,
.indent = 0,
.require_ref = ast.require_ref,
.module_hash = module_id,
.runtime_imports = ast.runtime_imports,
.prepend_part_value = &prepend_part,
.prepend_part_key = if (needs_prepend_part) closure.body.stmts.ptr else null,
},
Linker,
&bundler.linker,
&this.write_lock,
std.fs.File,
this.tmpfile,
std.fs.File.getPos,
&this.tmpfile_byte_offset,
);
code_offset = write_result.off;
},
}
}
if (comptime Environment.isDebug) {
Output.prettyln("{s}@{s}/{s} - {d}:{d} \n", .{ package.name, package.version, package_relative_path, package.hash, module_id });
Output.flush();
std.debug.assert(package_relative_path.len > 0);
}
try this.appendToModuleList(
package,
module_id,
code_offset,
package_relative_path,
);
} else {
// If it's app code, scan but do not fully parse.
switch (loader) {
.jsx,
.tsx,
.js,
.ts,
=> {
const entry = bundler.resolver.caches.fs.readFileShared(
bundler.fs,
file_path.textZ(),
resolve.dirname_fd,
if (resolve.file_fd != 0) resolve.file_fd else null,
shared_buffer,
) catch return;
if (entry.contents.len == 0 or (entry.contents.len < 33 and strings.trim(entry.contents, " \n\r").len == 0)) return;
const source = logger.Source.initRecycledFile(Fs.File{ .path = file_path, .contents = entry.contents }, bundler.allocator) catch return null;
var jsx = bundler.options.jsx;
jsx.parse = loader.isJSX();
var opts = js_parser.Parser.Options.init(jsx, loader);
opts.macro_context = &worker.data.macro_context;
opts.features.trim_unused_imports = bundler.options.trim_unused_imports orelse loader.isTypeScript();
try bundler.resolver.caches.js.scan(
bundler.allocator,
scan_pass_result,
opts,
bundler.options.define,
log,
&source,
);
worker.data.estimated_input_lines_of_code += scan_pass_result.approximate_newline_count;
{
for (scan_pass_result.import_records.items) |*import_record| {
if (import_record.is_internal or import_record.is_unused) {
continue;
}
if (bundler.options.platform.isBun()) {
if (JSC.DisabledModule.has(import_record.path.text)) {
import_record.path.is_disabled = true;
import_record.is_bundled = true;
continue;
}
if (JSC.HardcodedModule.Aliases.get(import_record.path.text)) |remapped| {
import_record.path.text = remapped.path;
import_record.tag = remapped.tag;
if (remapped.tag != .none) {
import_record.is_bundled = false;
continue;
}
}
}
var tmp = bundler.resolver.resolve(source_dir, import_record.path.text, import_record.kind);
if (tmp) |*_resolved_import| {
if (_resolved_import.is_external) {
continue;
}
var path = _resolved_import.path() orelse continue;
const loader_ = this.bundler.options.loader(path.name.ext);
if (!loader_.isJavaScriptLikeOrJSON()) continue;
path.* = try path.dupeAlloc(this.allocator);
if (BundledModuleData.get(this, _resolved_import)) |mod| {
if (comptime !FeatureFlags.bundle_dynamic_import) {
if (import_record.kind == .dynamic)
continue;
} else {
// When app code dynamically imports a large file
// Don't bundle it. Leave it as a separate file.
// The main value from bundling in development is to minimize tiny, waterfall http requests
// If you're importing > 100 KB file dynamically, developer is probably explicitly trying to do that.
// There's a tradeoff between "I want to minimize page load time"
if (import_record.kind == .dynamic) {
this.dynamic_import_file_size_store_lock.lock();
defer this.dynamic_import_file_size_store_lock.unlock();
var dynamic_import_file_size = this.dynamic_import_file_size_store.getOrPut(mod.module_id) catch unreachable;
if (!dynamic_import_file_size.found_existing) {
var fd = _resolved_import.file_fd;
var can_close = false;
if (fd == 0) {
dynamic_import_file_size.value_ptr.* = 0;
fd = (std.fs.openFileAbsolute(path.textZ(), .{}) catch |err| {
this.log.addRangeWarningFmt(
&source,
import_record.range,
worker.allocator,
"{s} opening file: \"{s}\"",
.{ @errorName(err), path.text },
) catch unreachable;
continue;
}).handle;
can_close = true;
Fs.FileSystem.setMaxFd(fd);
}
defer {
if (can_close and bundler.fs.fs.needToCloseFiles()) {
var _file = std.fs.File{ .handle = fd };
_file.close();
_resolved_import.file_fd = 0;
} else if (FeatureFlags.store_file_descriptors) {
_resolved_import.file_fd = fd;
}
}
var file = std.fs.File{ .handle = fd };
var stat = file.stat() catch |err| {
this.log.addRangeWarningFmt(
&source,
import_record.range,
worker.allocator,
"{s} stat'ing file: \"{s}\"",
.{ @errorName(err), path.text },
) catch unreachable;
dynamic_import_file_size.value_ptr.* = 0;
continue;
};
dynamic_import_file_size.value_ptr.* = @truncate(u32, stat.size);
}
if (dynamic_import_file_size.value_ptr.* > 1024 * 100)
continue;
}
}
std.debug.assert(mod.module_id != 0);
_ = queue.getOrPutValue(
mod.module_id,
.{
.resolution = _resolved_import.*,
},
) catch unreachable;
} else {
_ = queue.getOrPutValue(
_resolved_import.hash(
this.bundler.fs.top_level_dir,
loader_,
),
.{
.resolution = _resolved_import.*,
},
) catch unreachable;
}
} else |err| {
switch (err) {
error.ModuleNotFound => {
if (!import_record.handles_import_errors) {
const addError = logger.Log.addResolveErrorWithTextDupeMaybeWarn;
if (isPackagePath(import_record.path.text)) {
if (platform.isWebLike() and options.ExternalModules.isNodeBuiltin(import_record.path.text)) {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve Node.js builtin: \"{s}\".",
.{import_record.path.text},
import_record.kind,
platform.isBun(),
);
} else {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve: \"{s}\". Maybe you need to \"bun install\"?",
.{import_record.path.text},
import_record.kind,
platform.isBun(),
);
}
} else if (!platform.isBun()) {
try addError(
log,
&source,
import_record.range,
this.allocator,
"Could not resolve: \"{s}\"",
.{
import_record.path.text,
},
import_record.kind,
platform.isBun(),
);
}
}
},
// assume other errors are already in the log
else => {},
}
}
}
}
},
else => {},
}
}
if (queue.count() > 0) {
try this.queue.writeItem(queue);
}
}
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