Avoid prematurely turning srcs into a depset before rustc_compile_action

Author: dzbarsky

extensions/prost/private/prost.bzl

@@ -66,7 +66,7 @@ def _compile_proto(
     lib_rs = ctx.actions.declare_file("{}.lib.rs".format(ctx.label.name))
 
     proto_compiler = prost_toolchain.proto_compiler
-    tools = depset([proto_compiler.executable])
+    tools = [proto_compiler.executable]
 
     tonic_opts = []
     prost_opts = []
@@ -78,34 +78,33 @@ def _compile_proto(
 
     all_additional_srcs = depset(transitive = additional_srcs)
     direct_crate_names = [dep[ProstProtoInfo].dep_variant_info.crate_info.name for dep in deps]
-    additional_args = ctx.actions.args()
 
     # Prost process wrapper specific args
-    compile_well_known_types = prost_toolchain.compile_well_known_types
-    additional_args.add("--protoc={}".format(proto_compiler.executable.path))
-    additional_args.add("--label={}".format(ctx.label))
-    additional_args.add("--out_librs={}".format(lib_rs.path))
+    additional_args = ctx.actions.args()
+    additional_args.add(proto_compiler.executable, format = "--protoc=%s")
+    additional_args.add(ctx.label, format = "--label=%s")
+    additional_args.add(lib_rs, format = "--out_librs=%s")
     additional_args.add("--package_info_output={}".format("{}={}".format(crate_name, package_info_file.path)))
-    additional_args.add("--deps_info={}".format(deps_info_file.path))
-    additional_args.add("--direct_dep_crate_names={}".format(",".join(direct_crate_names)))
-    if compile_well_known_types:
+    additional_args.add(deps_info_file, format = "--deps_info=%s")
+    additional_args.add_joined(direct_crate_names, join_with = ",", format_joined = "--direct_dep_crate_names=%s")
+    if prost_toolchain.compile_well_known_types:
         additional_args.add("--compile_well_known_types")
-    additional_args.add("--descriptor_set={}".format(proto_info.direct_descriptor_set.path))
-    additional_args.add("--additional_srcs={}".format(",".join([f.path for f in all_additional_srcs.to_list()])))
+    additional_args.add(proto_info.direct_descriptor_set, format = "--descriptor_set=%s")
+    additional_args.add_joined(all_additional_srcs, join_with = ",", format_joined = "--additional_srcs=%s")
     additional_args.add_all(prost_toolchain.prost_opts + prost_opts, format_each = "--prost_opt=%s")
 
     if prost_toolchain.tonic_plugin:
         tonic_plugin = prost_toolchain.tonic_plugin[DefaultInfo].files_to_run
-        additional_args.add(prost_toolchain.tonic_plugin_flag % tonic_plugin.executable.path)
+        additional_args.add(tonic_plugin.executable, format = prost_toolchain.tonic_plugin_flag)
         additional_args.add("--tonic_opt=no_include")
         additional_args.add("--is_tonic")
 
         additional_args.add_all(prost_toolchain.tonic_opts + tonic_opts, format_each = "--tonic_opt=%s")
-        tools = depset([tonic_plugin.executable], transitive = [tools])
+        tools.append(tonic_plugin.executable)
 
     if rustfmt_toolchain:
-        additional_args.add("--rustfmt={}".format(rustfmt_toolchain.rustfmt.path))
-        tools = depset(transitive = [tools, rustfmt_toolchain.all_files])
+        additional_args.add(rustfmt_toolchain.rustfmt, format = "--rustfmt=%s")
+        tools = depset(tools, transitive = [rustfmt_toolchain.all_files]).to_list()
 
     additional_inputs = depset(
         [deps_info_file, proto_info.direct_descriptor_set] + [dep[ProstProtoInfo].package_info for dep in deps],
@@ -115,7 +114,7 @@ def _compile_proto(
     proto_common.compile(
         actions = ctx.actions,
         proto_info = proto_info,
-        additional_tools = tools.to_list(),
+        additional_tools = tools,
         additional_inputs = additional_inputs,
         additional_args = additional_args,
         generated_files = [lib_rs, package_info_file],
@@ -208,7 +207,7 @@ def _compile_rust(
             name = crate_name,
             type = "rlib",
             root = src,
-            srcs = depset([src]),
+            srcs = [src],
             deps = deps,
             proc_macro_deps = [],
             aliases = {},

extensions/protobuf/proto.bzl

@@ -228,7 +228,7 @@ def _rust_proto_compile(protos, descriptor_sets, imports, crate_name, ctx, is_gr
             name = crate_name,
             type = "rlib",
             root = lib_rs,
-            srcs = depset(srcs),
+            srcs = srcs,
             deps = compile_action_deps,
             proc_macro_deps = [],
             aliases = {},

extensions/wasm_bindgen/private/wasm_bindgen_test.bzl

@@ -121,7 +121,7 @@ def _rust_wasm_bindgen_test_impl(ctx):
         name = crate.name,
         type = crate_type,
         root = crate.root,
-        srcs = depset(srcs, transitive = [crate.srcs]),
+        srcs = depset(srcs, transitive = [crate.srcs]).to_list(),
         deps = depset(deps, transitive = [crate.deps]).to_list(),
         proc_macro_deps = depset(proc_macro_deps, transitive = [crate.proc_macro_deps]).to_list(),
         aliases = {},

rust/private/rust.bzl

@@ -220,7 +220,7 @@ def _rust_library_common(ctx, crate_type):
             name = crate_name,
             type = crate_type,
             root = crate_root,
-            srcs = depset(srcs),
+            srcs = srcs,
             deps = deps,
             proc_macro_deps = proc_macro_deps,
             aliases = ctx.attr.aliases,
@@ -285,7 +285,7 @@ def _rust_binary_impl(ctx):
             name = crate_name,
             type = ctx.attr.crate_type,
             root = crate_root,
-            srcs = depset(srcs),
+            srcs = srcs,
             deps = deps,
             proc_macro_deps = proc_macro_deps,
             aliases = ctx.attr.aliases,
@@ -417,7 +417,7 @@ def _rust_test_impl(ctx):
             name = crate_name,
             type = crate_type,
             root = crate.root,
-            srcs = depset(srcs),
+            srcs = srcs,
             deps = depset(deps, transitive = [crate.deps]).to_list(),
             proc_macro_deps = depset(proc_macro_deps, transitive = [crate.proc_macro_deps]).to_list(),
             aliases = aliases,
@@ -483,7 +483,7 @@ def _rust_test_impl(ctx):
             name = crate_name,
             type = crate_type,
             root = crate_root,
-            srcs = depset(srcs),
+            srcs = srcs,
             deps = deps,
             proc_macro_deps = proc_macro_deps,
             aliases = ctx.attr.aliases,

rust/private/rustc.bzl

@@ -1204,15 +1204,18 @@ def rustc_compile_action(
     """
     deps = crate_info_dict.pop("deps")
     proc_macro_deps = crate_info_dict.pop("proc_macro_deps")
+    srcs = crate_info_dict.pop("srcs")
+
     crate_info = rust_common.create_crate_info(
         deps = depset(deps),
         proc_macro_deps = depset(proc_macro_deps),
+        srcs = depset(srcs),
         **crate_info_dict
     )
 
-    build_metadata = crate_info_dict.get("metadata", None)
-    rustc_output = crate_info_dict.get("rustc_output", None)
-    rustc_rmeta_output = crate_info_dict.get("rustc_rmeta_output", None)
+    build_metadata = crate_info.metadata
+    rustc_output = crate_info.rustc_output
+    rustc_rmeta_output = crate_info.rustc_rmeta_output
 
     # Determine whether to use cc_common.link:
     #  * either if experimental_use_cc_common_link is 1,
@@ -1230,7 +1233,7 @@ def rustc_compile_action(
     dep_info, build_info, linkstamps = collect_deps(
         deps = deps,
         proc_macro_deps = proc_macro_deps,
-        aliases = crate_info_dict["aliases"],
+        aliases = crate_info.aliases,
     )
     extra_disabled_features = [RUST_LINK_CC_FEATURE]
     if crate_info.type in ["bin", "cdylib"] and dep_info.transitive_noncrates.to_list():
@@ -1399,7 +1402,7 @@ def rustc_compile_action(
                 crate_info.type,
                 ctx.label.name,
                 formatted_version,
-                len(crate_info.srcs.to_list()),
+                len(srcs),
             ),
             toolchain = "@rules_rust//rust:toolchain_type",
             resource_set = get_rustc_resource_set(toolchain),
@@ -1416,7 +1419,7 @@ def rustc_compile_action(
                     crate_info.type,
                     ctx.label.name,
                     formatted_version,
-                    len(crate_info.srcs.to_list()),
+                    len(srcs),
                 ),
                 toolchain = "@rules_rust//rust:toolchain_type",
             )
@@ -1435,7 +1438,7 @@ def rustc_compile_action(
                 crate_info.type,
                 ctx.label.name,
                 formatted_version,
-                len(crate_info.srcs.to_list()),
+                len(srcs),
             ),
             toolchain = "@rules_rust//rust:toolchain_type",
             resource_set = get_rustc_resource_set(toolchain),
@@ -1604,6 +1607,7 @@ def rustc_compile_action(
         crate_info = rust_common.create_crate_info(
             deps = depset(deps),
             proc_macro_deps = depset(proc_macro_deps),
+            srcs = depset(srcs),
             **crate_info_dict
         )
 

test/unit/consistent_crate_name/with_modified_crate_name.bzl

@@ -11,7 +11,7 @@ load("//rust/private:rustc.bzl", "rustc_compile_action")
 def _with_modified_crate_name_impl(ctx):
     toolchain = ctx.toolchains[Label("//rust:toolchain_type")]
 
-    crate_root = ctx.attr.src.files.to_list()[0]
+    crate_root = ctx.file.src
     output_hash = repr(hash(crate_root.path))
     crate_name = ctx.label.name + "_my_custom_crate_suffix"
     crate_type = "rlib"
@@ -39,7 +39,7 @@ def _with_modified_crate_name_impl(ctx):
             name = crate_name,
             type = crate_type,
             root = crate_root,
-            srcs = ctx.attr.src.files,
+            srcs = ctx.files.src,
             deps = deps,
             proc_macro_deps = [],
             aliases = {},

test/unit/force_all_deps_direct/generator.bzl

@@ -55,7 +55,7 @@ def _generator_impl(ctx):
             name = crate_name,
             type = crate_type,
             root = rs_file,
-            srcs = depset([rs_file]),
+            srcs = [rs_file],
             deps = deps,
             proc_macro_deps = [],
             aliases = {},

test/unit/pipelined_compilation/wrap.bzl

@@ -67,7 +67,7 @@ def _wrap_impl(ctx):
             name = crate_name,
             type = crate_type,
             root = rs_file,
-            srcs = depset([rs_file]),
+            srcs = [rs_file],
             deps = deps,
             proc_macro_deps = [],
             aliases = {},