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Adding PRESUBMIT check to avoid mixing C, C++ and Objc-C/Obj-C++.

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The error message will be something like:

GN targets cannot mix .c (or .cc) and .m (or .mm) source files.
Please create a separate target for each collection of sources.
Mixed sources:
{
  BUILD_GN_PATH: [
    [
      TARGET_NAME,
      [
        SOURCES
      ]
    ],
    ...
  ],
  ...
}

Bug: webrtc:7743
Change-Id: I45dd2c621b830e5aeb081fa8d17c9497a49c2554
Reviewed-on: https://webrtc-review.googlesource.com/1980
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19897}
This commit is contained in:
Mirko Bonadei
2017-09-19 10:41:02 +02:00
committed by Commit Bot
parent 7de1eb7bdc
commit 0c15c5332f
3 changed files with 138 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
PRESUBMIT.py
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@ -11,6 +11,7 @@ import os
import re
import subprocess
import sys
from collections import defaultdict
# Files and directories that are *skipped* by cpplint in the presubmit script.
@ -67,6 +68,7 @@ NATIVE_API_DIRS = (
'modules/audio_device/include',
'pc',
)
# These directories should not be used but are maintained only to avoid breaking
# some legacy downstream code.
LEGACY_API_DIRS = (
@ -90,8 +92,22 @@ LEGACY_API_DIRS = (
'system_wrappers/include',
'voice_engine/include',
)
API_DIRS = NATIVE_API_DIRS[:] + LEGACY_API_DIRS[:]
# TARGET_RE matches a GN target, and extracts the target name and the contents.
TARGET_RE = re.compile(r'(?P<indent>\s*)\w+\("(?P<target_name>\w+)"\) {'
r'(?P<target_contents>.*?)'
r'(?P=indent)}',
re.MULTILINE | re.DOTALL)
# SOURCES_RE matches a block of sources inside a GN target.
SOURCES_RE = re.compile(r'sources \+?= \[(?P<sources>.*?)\]',
re.MULTILINE | re.DOTALL)
# FILE_PATH_RE matchies a file path.
FILE_PATH_RE = re.compile(r'"(?P<file_path>(\w|\/)+)(?P<extension>\.\w+)"')
def _RunCommand(command, cwd):
"""Runs a command and returns the output from that command."""
@ -297,33 +313,48 @@ def CheckNoSourcesAbove(input_api, gn_files, output_api):
items=violating_gn_files)]
return []
def CheckNoMixingCAndCCSources(input_api, gn_files, output_api):
# Disallow mixing .c and .cc source files in the same target.
source_pattern = input_api.re.compile(r' +sources \+?= \[(.*?)\]',
re.MULTILINE | re.DOTALL)
file_pattern = input_api.re.compile(r'"(.*)"')
violating_gn_files = dict()
def CheckNoMixingSources(input_api, gn_files, output_api):
"""Disallow mixing C, C++ and Obj-C/Obj-C++ in the same target.
See bugs.webrtc.org/7743 for more context.
"""
def _MoreThanOneSourceUsed(*sources_lists):
sources_used = 0
for source_list in sources_lists:
if len(source_list):
sources_used += 1
return sources_used > 1
errors = defaultdict(lambda: [])
for gn_file in gn_files:
contents = input_api.ReadFile(gn_file)
for source_block_match in source_pattern.finditer(contents):
gn_file_content = input_api.ReadFile(gn_file)
for target_match in TARGET_RE.finditer(gn_file_content):
c_files = []
cc_files = []
for file_list_match in file_pattern.finditer(source_block_match.group(1)):
source_file = file_list_match.group(1)
if source_file.endswith('.c'):
c_files.append(source_file)
if source_file.endswith('.cc'):
cc_files.append(source_file)
if c_files and cc_files:
violating_gn_files[gn_file.LocalPath()] = sorted(c_files + cc_files)
if violating_gn_files:
objc_files = []
target_name = target_match.group('target_name')
target_contents = target_match.group('target_contents')
for sources_match in SOURCES_RE.finditer(target_contents):
for file_match in FILE_PATH_RE.finditer(sources_match.group(1)):
file_path = file_match.group('file_path')
extension = file_match.group('extension')
if extension == '.c':
c_files.append(file_path + extension)
if extension == '.cc':
cc_files.append(file_path + extension)
if extension in ['.m', '.mm']:
objc_files.append(file_path + extension)
if _MoreThanOneSourceUsed(c_files, cc_files, objc_files):
all_sources = sorted(c_files + cc_files + objc_files)
errors[gn_file.LocalPath()].append((target_name, all_sources))
if errors:
return [output_api.PresubmitError(
'GN targets cannot mix .cc and .c source files. Please create a '
'separate target for each collection of sources.\n'
'GN targets cannot mix .c, .cc and .m (or .mm) source files.\n'
'Please create a separate target for each collection of sources.\n'
'Mixed sources: \n'
'%s\n'
'Violating GN files:' % json.dumps(violating_gn_files, indent=2),
items=violating_gn_files.keys())]
'Violating GN files:\n%s\n' % (json.dumps(errors, indent=2),
'\n'.join(errors.keys())))]
return []
def CheckNoPackageBoundaryViolations(input_api, gn_files, output_api):
@ -350,9 +381,9 @@ def CheckGnChanges(input_api, output_api):
result = []
if gn_files:
result.extend(CheckNoSourcesAbove(input_api, gn_files, output_api))
result.extend(CheckNoMixingCAndCCSources(input_api, gn_files, output_api))
result.extend(CheckNoPackageBoundaryViolations(
input_api, gn_files, output_api))
result.extend(CheckNoMixingSources(input_api, gn_files, output_api))
result.extend(CheckNoPackageBoundaryViolations(input_api, gn_files,
output_api))
return result
def CheckUnwantedDependencies(input_api, output_api):