SERVER-108552 dynamically set mongo version (#39465)

GitOrigin-RevId: c24e0e2bc0b55d2be31a74cfd9f389d7e8dcbebd

.bazelrc

@@ -513,9 +513,6 @@ common:fission --remote_download_regex=.*\.dwo$
 # Avoid failing builds when BES metadata fails to upload.
 common --bes_upload_mode=fully_async
 
-# Default Mongo Version if a version is not specified.
-common --define=MONGO_VERSION=8.2.0-alpha
-
 # Default distmod if not specified.
 common --define=MONGO_DISTMOD=""
 
@@ -531,6 +528,9 @@ try-import %workspace%/.bazelrc.evergreen
 # local default dev settings
 try-import %workspace%/.bazelrc.common_bes
 
+# local default dev settings
+try-import %workspace%/.bazelrc.mongo_version
+
 # local git version info
 try-import %workspace%/.bazelrc.git
 

.gitignore

@@ -291,6 +291,7 @@ buildozer
 .bazelrc.gitinfo
 .bazelrc.workstation
 .bazelrc.common_bes
+.bazelrc.mongo_version
 .bazelrc.compiledb
 .bazelrc.sync
 .compiledb

bazel/wrapper_hook/BUILD.bazel

@@ -10,6 +10,7 @@ py_library(
         "install_modules.py",
         "lint.py",
         "plus_interface.py",
+        "set_mongo_version.py",
         "wrapper_debug.py",
         "wrapper_hook.py",
     ],

bazel/wrapper_hook/compiledb.py

@@ -11,6 +11,8 @@ import sys
 REPO_ROOT = pathlib.Path(__file__).parent.parent.parent
 sys.path.append(str(REPO_ROOT))
 
+from bazel.wrapper_hook.set_mongo_version import write_mongo_version_bazelrc
+
 
 def run_pty_command(cmd):
     stdout = None
@@ -43,6 +45,9 @@ def run_pty_command(cmd):
 
 
 def generate_compiledb(bazel_bin, persistent_compdb, enterprise):
+
+    # compiledb ignores command line args so just make a version rc file in anycase
+    write_mongo_version_bazelrc([])
     if persistent_compdb:
         info_proc = subprocess.run(
             [bazel_bin, "info", "output_base"], capture_output=True, text=True

bazel/wrapper_hook/set_mongo_version.py

@@ -0,0 +1,29 @@
+import hashlib
+import os
+import pathlib
+import subprocess
+
+
+def write_mongo_version_bazelrc(args):
+
+    # quick return don't waste time if set on command line
+    if any(["MONGO_VERSION" in arg for arg in args]):
+        return
+    
+
+    repo_root = pathlib.Path(os.path.abspath(__file__)).parent.parent.parent
+    version_file = os.path.join(repo_root, ".bazelrc.mongo_version")
+    existing_hash = ""
+    if os.path.exists(version_file):
+        with open(version_file, encoding="utf-8") as f:
+            existing_hash = hashlib.md5(f.read().encode()).hexdigest()
+
+
+    proc = subprocess.run(["git", "describe", "--abbrev=0"], capture_output=True, text=True)
+    bazelrc_contents = f"""
+common --define=MONGO_VERSION={proc.stdout.strip()[1:]}
+"""
+    current_hash = hashlib.md5(bazelrc_contents.encode()).hexdigest()
+    if existing_hash != current_hash:
+        with open(version_file, "w", encoding="utf-8") as f:
+            f.write(bazelrc_contents)

bazel/wrapper_hook/wrapper_hook.py

@@ -22,6 +22,7 @@ def main():
     from bazel.wrapper_hook.engflow_check import engflow_auth
     from bazel.wrapper_hook.generate_common_bes_bazelrc import write_workstation_bazelrc
     from bazel.wrapper_hook.plus_interface import check_bazel_command_type, test_runner_interface
+    from bazel.wrapper_hook.set_mongo_version import write_mongo_version_bazelrc
 
     # This is used to autogenerate a BUILD.bazel that creates
     # Filegroups for select tags - used to group targets for installing
@@ -42,6 +43,8 @@ def main():
 
         write_workstation_bazelrc(args)
 
+        write_mongo_version_bazelrc(args)
+
         args = test_runner_interface(
             sys.argv[1:],
             autocomplete_query=os.environ.get("MONGO_AUTOCOMPLETE_QUERY") == "1",