diff options
Diffstat (limited to 'packages/Python/lldbsuite/test/lldb_pylint_helper.py')
-rw-r--r-- | packages/Python/lldbsuite/test/lldb_pylint_helper.py | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/lldb_pylint_helper.py b/packages/Python/lldbsuite/test/lldb_pylint_helper.py new file mode 100644 index 0000000..1cc0944 --- /dev/null +++ b/packages/Python/lldbsuite/test/lldb_pylint_helper.py @@ -0,0 +1,181 @@ +""" + The LLVM Compiler Infrastructure + +This file is distributed under the University of Illinois Open Source +License. See LICENSE.TXT for details. + +Sync lldb and related source from a local machine to a remote machine. + +This facilitates working on the lldb sourcecode on multiple machines +and multiple OS types, verifying changes across all. + +Provides helper support for adding lldb test paths to the python path. +""" + +from __future__ import print_function +from __future__ import absolute_import + +# System modules +import os +import platform +import subprocess +import sys + +# Third-party modules + +# LLDB modules + + +def add_lldb_test_paths(check_dir): + # pylint: disable=line-too-long + """Adds lldb test-related paths to the python path. + + Starting with the given directory and working upward through + each parent directory up to the root, it looks for the lldb + test directory. When found, the lldb test directory and its + child test_runner/lib directory will be added to the python + system path. + + Instructions for use: + + This method supports a simple way of getting pylint to be able + to reliably lint lldb python test scripts (including the test + infrastructure itself). To do so, add the following to a + .pylintrc file in your home directory: + + [Master] + init-hook='import os; import sys; sys.path.append(os.path.expanduser("~/path/to/lldb/packages/Python/lldbsuite/test")); import lldb_pylint_helper; lldb_pylint_helper.add_lldb_test_paths(os.getcwd()); print("sys.path={}\n".format(sys.path))' + + Replace ~/path/to/lldb with a valid path to your local lldb source + tree. Note you can have multiple lldb source trees on your system, and + this will work just fine. The path in your .pylintrc is just needed to + find the paths needed for pylint in whatever lldb source tree you're in. + pylint will use the python files in whichever tree it is run from. + + Note it is critical that the init-hook line be contained on a single line. + You can remove the print line at the end once you know the pythonpath is + getting set up the way you expect. + + With these changes, you will be able to run the following, for example. + + cd lldb/sourcetree/1-of-many/test/lang/c/anonymous + pylint TestAnonymous.py + + This will work, and include all the lldb/sourcetree/1-of-many lldb-specific + python directories to your path. + + You can then run it in another lldb source tree on the same machine like + so: + + cd lldb/sourcetree/2-of-many/test/functionalities/inferior-assert + pyline TestInferiorAssert.py + + and this will properly lint that file, using the lldb-specific python + directories from the 2-of-many source tree. + + Note at the time I'm writing this, our tests are in pretty sad shape + as far as a stock pylint setup goes. But we need to start somewhere :-) + + @param check_dir specifies a directory that will be used to start + looking for the lldb test infrastructure python library paths. + """ + # Add the test-related packages themselves. + add_lldb_test_package_paths(check_dir) + + # Add the lldb directory itself + add_lldb_module_directory() + + +def add_lldb_module_directory(): + """ + Desired Approach: + + Part A: find an lldb + + 1. Walk up the parent chain from the current directory, looking for + a directory matching *build*. If we find that, use it as the + root of a directory search for an lldb[.exe] executable. + + 2. If 1 fails, use the path and look for an lldb[.exe] in there. + + If Part A ends up with an lldb, go to part B. Otherwise, give up + on the lldb python module path. + + Part B: use the output from 'lldb[.exe] -P' to find the lldb dir. + + Current approach: + If Darwin, use 'xcrun lldb -P'; others: find lldb on path. + + Drawback to current approach: + If the tester is changing the SB API (adding new methods), pylint + will not know about them as it is using the wrong lldb python module. + In practice, this should be minor. + """ + try: + lldb_module_path = None + + if platform.system() == 'Darwin': + # Use xcrun to find the selected lldb. + lldb_module_path = subprocess.check_output(["xcrun", "lldb", "-P"]) + elif platform.system() == 'Windows': + lldb_module_path = subprocess.check_output( + ["lldb.exe", "-P"], shell=True) + else: + # Use the shell to run lldb from the path. + lldb_module_path = subprocess.check_output( + ["lldb", "-P"], shell=True) + + # Trim the result. + if lldb_module_path is not None: + lldb_module_path = lldb_module_path.strip() + + # If we have a result, add it to the path + if lldb_module_path is not None and len(lldb_module_path) > 0: + sys.path.insert(0, lldb_module_path) + # pylint: disable=broad-except + except Exception as exception: + print("failed to find python path: {}".format(exception)) + + +def add_lldb_test_package_paths(check_dir): + """Adds the lldb test infrastructure modules to the python path. + + See add_lldb_test_paths for more details. + + @param check_dir the directory of the test. + """ + + def child_dirs(parent_dir): + return [os.path.join(parent_dir, child) + for child in os.listdir(parent_dir) + if os.path.isdir(os.path.join(parent_dir, child))] + + check_dir = os.path.realpath(check_dir) + while check_dir and len(check_dir) > 0: + # If the current directory contains a packages/Python + # directory, add that directory to the path. + packages_python_child_dir = os.path.join( + check_dir, "packages", "Python") + if os.path.exists(packages_python_child_dir): + sys.path.insert(0, packages_python_child_dir) + sys.path.insert(0, os.path.join( + packages_python_child_dir, "test_runner", "lib")) + + # Handle third_party module/package directory. + third_party_module_dir = os.path.join( + check_dir, "third_party", "Python", "module") + for child_dir in child_dirs(third_party_module_dir): + # Yes, we embed the module in the module parent dir + sys.path.insert(0, child_dir) + + # We're done. + break + + # Continue looking up the parent chain until we have no more + # directories to check. + new_check_dir = os.path.dirname(check_dir) + # We're done when the new check dir is not different + # than the current one. + if new_check_dir == check_dir: + break + check_dir = new_check_dir |