Symbol minification (#2695)

* minify

* Update renamer.zig

* --minify-whitespace

* Speed up minification a little

* handle private names

* 5% faster minification

* use helper function

* fix nested scope slots

* `bun build --minify` gets another +8% faster

* print semicolons afterwards

* print semicolon after checking error

* after all error checking

* Delete code for generating legacy bundes

* remove extra whitespace around if statements

* print space before import identifier

* Use `@constCast`

* Make `S.Local#decls` use `BabyList(Decl)`

* Add `fromSlice` helper to `BabyList`

* Remove unnecessary optional chains

* minify `undefined, true, false`

* Another @constCast

* Implement merge adjacent local var

* Support --minify in `bun build --transform`

* skip comments when counting character frequencies

* Don't wrap commonjs with --transform on (unless targeting bun)

* Support --minify in the runtime

* Fix edgecase with import * as

* don't infinite loop

* --trnasform shouldn't mess with require

* Only track comments when minifying

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/cli/build_command.zig b/src/cli/build_command.zig
index 0f0cd2609..33ab05632 100644
--- a/src/cli/build_command.zig
+++ b/src/cli/build_command.zig
@@ -27,7 +27,6 @@ const resolve_path = @import("../resolver/resolve_path.zig");
 const configureTransformOptionsForBun = @import("../bun.js/config.zig").configureTransformOptionsForBun;
 const bundler = bun.bundler;
 const NodeModuleBundle = @import("../node_module_bundle.zig").NodeModuleBundle;
-const GenerateNodeModuleBundle = @import("../bundler/generate_node_modules_bundle.zig");
 const DotEnv = @import("../env_loader.zig");
 
 const fs = @import("../fs.zig");
@@ -53,12 +52,16 @@ pub const BuildCommand = struct {
         this_bundler.resolver.opts.react_server_components = ctx.bundler_options.react_server_components;
         this_bundler.options.code_splitting = ctx.bundler_options.code_splitting;
         this_bundler.resolver.opts.code_splitting = ctx.bundler_options.code_splitting;
+
         this_bundler.options.minify_syntax = ctx.bundler_options.minify_syntax;
-        this_bundler.resolver.opts.minify_whitespace = ctx.bundler_options.minify_whitespace;
+        this_bundler.resolver.opts.minify_syntax = ctx.bundler_options.minify_syntax;
 
         this_bundler.options.minify_whitespace = ctx.bundler_options.minify_whitespace;
         this_bundler.resolver.opts.minify_whitespace = ctx.bundler_options.minify_whitespace;
 
+        this_bundler.options.minify_identifiers = ctx.bundler_options.minify_identifiers;
+        this_bundler.resolver.opts.minify_identifiers = ctx.bundler_options.minify_identifiers;
+
         this_bundler.configureLinker();
 
         // This step is optional
@@ -99,6 +102,8 @@ pub const BuildCommand = struct {
             if (ctx.bundler_options.transform_only) {
                 this_bundler.linker.options.resolve_mode = .lazy;
                 this_bundler.options.import_path_format = .relative;
+                this_bundler.options.allow_runtime = false;
+                this_bundler.resolver.opts.allow_runtime = false;
 
                 // TODO: refactor this .transform function
                 const result = try this_bundler.transform(