SERVER-97283 fix ninja compiledb (#29306)

GitOrigin-RevId: c571ee716edb731ab2c0dbb7ab83d4ba56dd82fa

.gitignore

@@ -280,7 +280,7 @@ buildifier
 .bazelrc.gitinfo
 .bazelrc.workstation
 .bazelrc.xcode
-.bazel_info_for_ninja.txt
+*.bazel_info_for_ninja.txt
 .ninja_last_command_line_targets.txt
 bazel/coverity/analysis/BUILD.bazel
 .bazel_include_info.json

SConstruct

@@ -744,6 +744,31 @@ add_option(
     help="Name a toolchain root for use with toolchain selection Variables files in etc/scons",
 )
 
+if mongo_toolchain_execroot:
+    bin_dir = os.path.join(mongo_toolchain_execroot, "external/mongo_toolchain/v4/bin")
+    gcc_path = os.path.dirname(
+        os.path.realpath(os.path.join(bin_dir, os.readlink(os.path.join(bin_dir, "g++"))))
+    )
+    clang_path = os.path.dirname(
+        os.path.realpath(os.path.join(bin_dir, os.readlink(os.path.join(bin_dir, "clang++"))))
+    )
+else:
+    gcc_path = ""
+    clang_path = ""
+
+add_option(
+    "bazel-toolchain-clang",
+    default=clang_path,
+    help="used in Variables files to help find the real bazel toolchain location.",
+)
+
+add_option(
+    "bazel-toolchain-gcc",
+    default=gcc_path,
+    help="used in Variables files to help find the real bazel toolchain location.",
+)
+
+
 add_option(
     "msvc-debugging-format",
     choices=["codeview", "pdb"],
@@ -6615,9 +6640,8 @@ elif env.GetOption("build-mongot"):
 
 # __NINJA_NO is ninja callback to scons signal, in that case we care about
 # scons only targets not thin targets.
-if env.get("__NINJA_NO") != "1":
-    env.Tool("integrate_bazel")
-else:
+env.Tool("integrate_bazel")
+if env.get("__NINJA_NO") == "1":
     env.LoadBazelBuilders()
 
     def noop(*args, **kwargs):

etc/scons/mongodbtoolchain_v4_clang.vars

@@ -56,17 +56,23 @@ if not ARGUMENTS.get('CC') and not ARGUMENTS.get("CXX") and platform.machine() !
    DWP = os.path.join(local_toolchain_bindir, 'dwp')
    READELF = os.path.join(local_toolchain_bindir, 'readelf')
    GDB = os.path.join(local_toolchain_bindir, 'gdb')
-
+   
+   bazel_toolchain_bin = SCons.Script.Main.GetOption('bazel-toolchain-clang')
+   if bazel_toolchain_bin:
+      cxx_realpath = os.path.join(bazel_toolchain_bin, "clang++")
+   else:
+      cxx_realpath = CXX
+   
    try:
-      AR = subprocess.check_output([CXX, '-print-prog-name=ar']).decode('utf-8').strip()
-      AS = subprocess.check_output([CXX, '-print-prog-name=as']).decode('utf-8').strip()
-      OBJCOPY = subprocess.check_output([CXX, '-print-prog-name=objcopy']).decode('utf-8').strip()
-      LLVM_SYMBOLIZER = subprocess.check_output([CXX, '-print-prog-name=llvm-symbolizer']).decode('utf-8').strip()
+      AR = subprocess.check_output([cxx_realpath, '-print-prog-name=ar']).decode('utf-8').strip()
+      AS = subprocess.check_output([cxx_realpath, '-print-prog-name=as']).decode('utf-8').strip()
+      OBJCOPY = subprocess.check_output([cxx_realpath, '-print-prog-name=objcopy']).decode('utf-8').strip()
+      LLVM_SYMBOLIZER = subprocess.check_output([cxx_realpath, '-print-prog-name=llvm-symbolizer']).decode('utf-8').strip()
    except subprocess.CalledProcessError as e:
-      print("Failed while invoking toolchain binary " + CXX + ": " + str(e.output))
+      print("Failed while invoking toolchain binary " + cxx_realpath + ": " + str(e.output))
       SCons.Script.Exit(-1)
    except OSError as e:
-      print("Failed to invoke toolchain binary " + CXX + ": " + str(e))
+      print("Failed to invoke toolchain binary " + cxx_realpath + ": " + str(e))
       SCons.Script.Exit(-1)
 
    DWARF_VERSION=4

etc/scons/mongodbtoolchain_v4_gcc.vars

@@ -56,15 +56,21 @@ if not ARGUMENTS.get('CC') and not ARGUMENTS.get("CXX"):
    READELF = os.path.join(local_toolchain_bindir, 'readelf')
    GDB = os.path.join(local_toolchain_bindir, 'gdb')
 
+   bazel_toolchain_bin = SCons.Script.Main.GetOption('bazel-toolchain-gcc')
+   if bazel_toolchain_bin:
+      cxx_realpath = os.path.join(bazel_toolchain_bin, "g++")
+   else:
+      cxx_realpath = CXX
+
    try:
-      AR = subprocess.check_output([CXX, '-print-prog-name=ar']).decode('utf-8').strip()
-      AS = subprocess.check_output([CXX, '-print-prog-name=as']).decode('utf-8').strip()
-      OBJCOPY = subprocess.check_output([CXX, '-print-prog-name=objcopy']).decode('utf-8').strip()
+      AR = subprocess.check_output([cxx_realpath, '-print-prog-name=ar']).decode('utf-8').strip()
+      AS = subprocess.check_output([cxx_realpath, '-print-prog-name=as']).decode('utf-8').strip()
+      OBJCOPY = subprocess.check_output([cxx_realpath, '-print-prog-name=objcopy']).decode('utf-8').strip()
    except subprocess.CalledProcessError as e:
-      print('Failed while invoking toolchain binary ' + CXX + ': ' + str(e.output))
+      print('Failed while invoking toolchain binary ' + cxx_realpath + ': ' + str(e.output))
       SCons.Script.Exit(-1)
    except OSError as e:
-      print('Failed to invoke toolchain binary ' + CXX + ': ' + str(e))
+      print('Failed to invoke toolchain binary ' + cxx_realpath + ': ' + str(e))
       SCons.Script.Exit(-1)
 
    DWARF_VERSION=5

site_scons/mongo/ninja_bazel_build.py

@@ -47,7 +47,8 @@ except OSError as exc:
 # the specific ninja file
 ninja_build_info = dict()
 try:
-    bazel_info_file = ".bazel_info_for_ninja.txt"
+    ninja_prefix = args.ninja_file.split(".")[0]
+    bazel_info_file = f".{ninja_prefix}.bazel_info_for_ninja.txt"
     with open(bazel_info_file) as f:
         ninja_build_info = json.load(f)
 except OSError as exc:

site_scons/site_tools/integrate_bazel.py

@@ -441,7 +441,10 @@ def bazel_build_thread_func(env, log_dir: str, verbose: bool, ninja_generate: bo
             os.remove(file)
         extra_args += ["--build_tag_filters=scons_link_lists"]
 
-    bazel_cmd = Globals.bazel_base_build_command + extra_args + ["//src/..."]
+    if SCons.Script.BUILD_TARGETS == ["compiledb"]:
+        bazel_cmd = Globals.bazel_base_build_command + extra_args + ["//:compiledb"]
+    else:
+        bazel_cmd = Globals.bazel_base_build_command + extra_args + ["//src/..."]
 
     if ninja_generate:
         print("Generating bazel link deps...")
@@ -599,7 +602,7 @@ def generate_bazel_info_for_ninja(env: SCons.Environment.Environment) -> None:
         "CXX": env.get("CXX", ""),
         "USE_NATIVE_TOOLCHAIN": os.environ.get("USE_NATIVE_TOOLCHAIN"),
     }
-    with open(".bazel_info_for_ninja.txt", "w") as f:
+    with open(f".{env.subst('$NINJA_PREFIX')}.bazel_info_for_ninja.txt", "w") as f:
         json.dump(ninja_bazel_build_json, f)
 
     # we also store the outputs in the env (the passed env is intended to be
@@ -616,6 +619,9 @@ def generate_bazel_info_for_ninja(env: SCons.Environment.Environment) -> None:
         ninja_bazel_outs += [bazel_t["bazel_output"]]
         ninja_bazel_ins += env.NinjaGetInputs(env.File(scons_t))
 
+    if platform.system() == "Linux" and not os.environ.get("USE_NATIVE_TOOLCHAIN"):
+        ninja_bazel_outs += [env.get("CC"), env.get("CXX")]
+
     # This is to be used directly by ninja later during generation of the ninja file
     env["NINJA_BAZEL_OUTPUTS"] = ninja_bazel_outs
     env["NINJA_BAZEL_INPUTS"] = ninja_bazel_ins
@@ -1260,6 +1266,9 @@ def generate(env: SCons.Environment.Environment) -> None:
         "\\", "/"
     )
 
+    if env.get("__NINJA_NO") == "1":
+        return
+
     # ThinTarget builder is a special bazel target and should not be prefixed with Bazel in the builder
     # name to exclude it from the other BazelBuilder's. This builder excludes any normal builder
     # mechanisms like scanners or emitters and functions as a pass through for targets which exist