Bazel: workaround rules_rust generation weirdness

Author: Paolo Tranquilli

misc/bazel/3rdparty/patch_defs.py

@@ -0,0 +1,16 @@
+import sys
+import re
+import pathlib
+
+label_re = re.compile(r'"@vendor//:(.+)-([\d.]+)"')
+
+file = pathlib.Path(sys.argv[1])
+temp = file.with_suffix(f'{file.suffix}.tmp')
+
+
+with open(file) as input, open(temp, "w") as output:
+    for line in input:
+        line = label_re.sub(lambda m: f'"@vendor__{m[1]}-{m[2]}//:{m[1].replace("-", "_")}"', line)
+        output.write(line)
+
+temp.rename(file)

misc/bazel/3rdparty/py_deps/defs.bzl

@@ -6,4 +6,6 @@ WORKSPACE_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )/../../.." &> /dev/nu
 
 cd "$WORKSPACE_DIR"
 time bazel run //misc/bazel/3rdparty:vendor_py_deps
+# no idea why this is necessary, see https://github.com/bazelbuild/rules_rust/issues/3255
+python3 "$WORKSPACE_DIR/misc/bazel/3rdparty/patch_defs.py" misc/bazel/3rdparty/py_deps/defs.bzl
 bazel mod tidy

misc/bazel/3rdparty/tree_sitter_extractors_deps/defs.bzl

@@ -10,4 +10,7 @@ time bazel run //misc/bazel/3rdparty:vendor_tree_sitter_extractors
 # we need access to this file in the rust extractor
 echo 'exports_files(["rust.ungram"])' >> misc/bazel/3rdparty/tree_sitter_extractors_deps/BUILD.ra_ap_syntax-?.*.bazel
 
+# no idea why this is necessary, see https://github.com/bazelbuild/rules_rust/issues/3255
+python3 "$WORKSPACE_DIR/misc/bazel/3rdparty/patch_defs.py" misc/bazel/3rdparty/tree_sitter_extractors_deps/defs.bzl
+
 bazel mod tidy