[infer] Apply python lint warnings on the Infer python code

Summary: Apply python lint warnings on the Infer python code

Reviewed By: sblackshear, jvillard

Differential Revision: D3970514

fbshipit-source-id: 962f6ca

infer/lib/python/infer.py

@@ -1,5 +1,12 @@
 #!/usr/bin/env python2.7
 
+# Copyright (c) 2015 - present Facebook, Inc.
+# All rights reserved.
+#
+# This source code is licensed under the BSD style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
@@ -7,7 +14,6 @@ from __future__ import unicode_literals
 
 import argparse
 import imp
-import json
 import locale
 import logging
 import os
@@ -40,9 +46,10 @@ MODULE_TO_COMMAND = {
     'ndk-build': ['ndk-build'],
 }
 
+
 def get_commands():
     """Return all commands that are supported."""
-    #flatten and dedup the list of commands
+    # flatten and dedup the list of commands
     return set(sum(MODULE_TO_COMMAND.values(), []))
 
 
@@ -110,7 +117,8 @@ def create_argparser(parents=[]):
         default=None,
         help=('Command to run the compiler/build-system. '
               'Supported build commands (run `infer --help -- <cmd_name>` for '
-              'extra help, e.g. `infer --help -- javac`): ' + supported_commands),
+              'extra help, e.g. `infer --help -- javac`): {}'.format(
+                supported_commands)),
     )
     return parser
 
@@ -151,10 +159,10 @@ def main():
 
     validate_args(imported_module, args)
 
-    remove_infer_out = (imported_module is not None
-                        and not args.reactive
-                        and capture_module_name != 'analyze'
-                        and not args.buck)
+    remove_infer_out = (imported_module is not None and
+                        not args.reactive and
+                        capture_module_name != 'analyze' and
+                        not args.buck)
     if remove_infer_out:
         analyze.remove_infer_out(args.infer_out)
 

infer/lib/python/inferlib/analyze.py

@@ -11,10 +11,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 
 import argparse
-import codecs
 import csv
-import glob
-import json
 import logging
 import multiprocessing
 import os
@@ -35,7 +32,7 @@ def get_infer_version():
     try:
         return subprocess.check_output([
             utils.get_cmd_in_bin_dir(INFER_ANALYZE_BINARY), '-version'])
-    except:
+    except subprocess.CalledProcessError:
         utils.stdout('Failed to run {0} binary, exiting'
                      .format(INFER_ANALYZE_BINARY))
         sys.exit(os.EX_UNAVAILABLE)
@@ -180,6 +177,7 @@ infer_group.add_argument('--specs-dir-list-file',
                               'in <file> to the list of directories to be '
                               'searched for spec files')
 
+
 def remove_infer_out(infer_out):
     # it is safe to ignore errors here because recreating the infer_out
     # directory will fail later
@@ -199,6 +197,7 @@ def reset_start_file(results_dir, touch_if_present=False):
         # create new empty file - this will update modified timestamp
         open(start_path, 'w').close()
 
+
 def clean(infer_out):
     directories = [
         'multicore', 'classnames', 'sources',
@@ -367,7 +366,6 @@ class AnalyzerWrapper(object):
         elif self.args.project_root:
             infer_options += ['-project_root', self.args.project_root]
 
-
         infer_options = map(utils.decode_or_not, infer_options)
         infer_options_str = ' '.join(infer_options)
         os.environ['INFER_OPTIONS'] = utils.encode(infer_options_str)
@@ -470,8 +468,9 @@ class AnalyzerWrapper(object):
             infer_print_cmd + infer_print_options
         )
         if exit_status != os.EX_OK:
-            logging.error('Error with InferPrint with the command: '
-                          + infer_print_cmd)
+            logging.error(
+                'Error with InferPrint with the command: {}'.format(
+                    infer_print_cmd))
         else:
             issues.clean_csv(self.args, csv_report)
             issues.clean_json(self.args, json_report)
@@ -479,7 +478,6 @@ class AnalyzerWrapper(object):
 
         return exit_status
 
-
     def read_proc_stats(self):
         proc_stats_path = os.path.join(
             self.args.infer_out,
@@ -529,7 +527,6 @@ class AnalyzerWrapper(object):
                                          bugs_out, xml_out)
 
     def analyze_and_report(self):
-        should_print_errors = False
         if self.args.analyzer not in [config.ANALYZER_COMPILE,
                                       config.ANALYZER_CAPTURE]:
             if self.args.analyzer == config.ANALYZER_LINTERS:

infer/lib/python/inferlib/bucklib.py

@@ -30,7 +30,7 @@ import time
 import traceback
 import zipfile
 
-from inferlib import analyze, config, issues, utils
+from inferlib import config, issues, utils
 
 
 ANALYSIS_SUMMARY_OUTPUT = 'analysis_summary.txt'
@@ -76,7 +76,7 @@ def prepare_build(args):
     # Create a temporary directory as a cache for jar files.
     infer_cache_dir = os.path.join(args.infer_out, 'cache')
     if not os.path.isdir(infer_cache_dir):
-       os.mkdir(infer_cache_dir)
+        os.mkdir(infer_cache_dir)
     infer_options += ['--infer_cache', infer_cache_dir]
     temp_files = [infer_cache_dir]
 
@@ -254,7 +254,7 @@ class NotFoundInJar(Exception):
 def load_stats(opened_jar):
     try:
         return json.loads(opened_jar.read(INFER_STATS).decode())
-    except KeyError as e:
+    except KeyError:
         raise NotFoundInJar
 
 
@@ -262,14 +262,14 @@ def load_csv_report(opened_jar):
     try:
         sio = io.StringIO(opened_jar.read(INFER_CSV_REPORT).decode())
         return list(utils.locale_csv_reader(sio))
-    except KeyError as e:
+    except KeyError:
         raise NotFoundInJar
 
 
 def load_json_report(opened_jar):
     try:
         return json.loads(opened_jar.read(INFER_JSON_REPORT).decode())
-    except KeyError as e:
+    except KeyError:
         raise NotFoundInJar
 
 
@@ -407,9 +407,9 @@ def cleanup(temp_files):
         try:
             logging.info('Removing %s' % file)
             if os.path.isdir(file):
-              shutil.rmtree(file)
+                shutil.rmtree(file)
             else:
-              os.unlink(file)
+                os.unlink(file)
         except IOError:
             logging.error('Could not remove %s' % file)
 
@@ -499,7 +499,8 @@ class Wrapper:
             sys.exit(0)
         except subprocess.CalledProcessError as e:
             if self.buck_args.keep_going:
-                print('Buck failed, but continuing analysis because --keep-going was passed')
+                print('Buck failed, but continuing the analysis '
+                      'because --keep-going was passed')
                 self._collect_results(start_time)
                 return os.EX_OK
             raise e

infer/lib/python/inferlib/capture/ant.py

@@ -5,7 +5,6 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
-import os
 import logging
 
 from . import util
@@ -19,6 +18,7 @@ Analysis examples:
 infer -- ant compile'''
 LANG = ['java']
 
+
 def gen_instance(*args):
     return AntCapture(*args)
 

infer/lib/python/inferlib/capture/buck.py

@@ -11,7 +11,6 @@ from __future__ import print_function
 from __future__ import unicode_literals
 
 import argparse
-import json
 import logging
 import os
 import subprocess
@@ -35,6 +34,8 @@ def gen_instance(*args):
 
 def string_in_quotes(value):
     return value.strip('\'')
+
+
 # This creates an empty argparser for the module, which provides only
 # description/usage information and no arguments.
 def create_argparser(group_name=MODULE_NAME):

infer/lib/python/inferlib/capture/javac.py

@@ -10,7 +10,7 @@ import subprocess
 import traceback
 
 import util
-from inferlib import analyze, jwlib
+from inferlib import jwlib
 
 MODULE_NAME = __name__
 MODULE_DESCRIPTION = '''Run analysis of code built with a command like:

infer/lib/python/inferlib/capture/make.py

@@ -30,6 +30,7 @@ ALIASED_COMMANDS = ['clang', 'clang++', 'cc', 'gcc', 'g++']
 BUILD_COMMANDS = ['cmake', 'configure', 'make', 'waf']
 SUPPORTED_COMMANDS = ALIASED_COMMANDS + BUILD_COMMANDS
 
+
 def gen_instance(*args):
     return MakeCapture(*args)
 

infer/lib/python/inferlib/capture/ndk-build.py

@@ -15,6 +15,7 @@ MODULE_DESCRIPTION = '''Run analysis of code built with ndk-build
     infer -- ndk-build'''
 LANG = ['clang']
 
+
 def gen_instance(*args):
     return NdkBuildCapture(*args)
 

infer/lib/python/inferlib/capture/util.py

@@ -18,7 +18,8 @@ import logging
 import subprocess
 import traceback
 
-from inferlib import analyze, jwlib, utils
+from inferlib import utils
+
 
 def get_build_output(build_cmd):
     #  TODO make it return generator to be able to handle large builds
@@ -45,7 +46,7 @@ def run_compilation_commands(cmds, clean_cmd):
 def run_cmd_ignore_fail(cmd):
     try:
         return subprocess.check_output(cmd, stderr=subprocess.STDOUT)
-    except:
+    except subprocess.CalledProcessError:
         return 'calling {cmd} failed\n{trace}'.format(
             cmd=' '.join(cmd),
             trace=traceback.format_exc())
@@ -62,7 +63,7 @@ def base_argparser(description, module_name):
         """This creates an empty argparser for the module, which provides only
         description/usage information and no arguments."""
         parser = argparse.ArgumentParser(add_help=False)
-        group = parser.add_argument_group(
+        parser.add_argument_group(
             '{grp} module'.format(grp=group_name),
             description=description,
         )

infer/lib/python/inferlib/capture/xcodebuild.py

@@ -63,7 +63,8 @@ class XcodebuildCapture:
     def capture(self):
         # these settings will instruct xcodebuild on which clang to use
         self.cmd += ['CC={wrapper}'.format(wrapper=CLANG_WRAPPER)]
-        self.cmd += ['CPLUSPLUS={wrapper}'.format(wrapper=CLANGPLUSPLUS_WRAPPER)]
+        self.cmd += [
+            'CPLUSPLUS={wrapper}'.format(wrapper=CLANGPLUSPLUS_WRAPPER)]
 
         # skip the ProcessPCH phase to fix the "newer/older" incompatibility
         # error for the pch files generated by apple's clang and

infer/lib/python/inferlib/config.py

@@ -35,7 +35,8 @@ BIN_DIRECTORY = os.path.join(INFER_INFER_DIRECTORY, 'bin')
 JAVA_LIB_DIRECTORY = os.path.join(LIB_DIRECTORY, 'java')
 MODELS_JAR = os.path.join(JAVA_LIB_DIRECTORY, 'models.jar')
 ANNOT_PROCESSOR_JAR = os.path.join(JAVA_LIB_DIRECTORY, 'processor.jar')
-ANNOT_PROCESSOR_NAMES = 'com.facebook.infer.annotprocess.CollectSuppressWarnings'
+ANNOT_PROCESSOR_NAMES = \
+    'com.facebook.infer.annotprocess.CollectSuppressWarnings'
 WRAPPERS_DIRECTORY = os.path.join(LIB_DIRECTORY, 'wrappers')
 XCODE_WRAPPERS_DIRECTORY = os.path.join(LIB_DIRECTORY, 'xcode_wrappers')
 

infer/lib/python/inferlib/issues.py

@@ -164,6 +164,7 @@ def clean_json(args, json_report):
     utils.dump_json_to_path(rows, temporary_file)
     shutil.move(temporary_file, json_report)
 
+
 def _text_of_infer_loc(loc):
     return ' ({}:{}:{}-{}:)'.format(
         loc[JSON_INDEX_ISL_FILE],

infer/lib/python/inferlib/jwlib.py

@@ -15,7 +15,6 @@ import argparse
 import codecs
 import os
 import subprocess
-import sys
 import tempfile
 import time
 
@@ -150,9 +149,10 @@ class CompilerCall(object):
                         if _is_empty_classpath(cp_line):
                             cp_line = '\n'
                         else:
-                            cp_line = ':%s\n' % cp_line
-                        args_file_cp.write(
-                            prefix + '-classpath\n' + classpath + cp_line + after_cp)
+                            cp_line = ':{}\n'.format(cp_line)
+                        cp_line = prefix + '-classpath\n' + classpath + cp_line
+                        cp_line += after_cp
+                        args_file_cp.write(cp_line)
                         at_arg_cp = '@' + args_file_cp.name
                         self.remaining_args = [
                             at_arg_cp if arg == at_arg else arg
@@ -170,8 +170,10 @@ class CompilerCall(object):
             # processors (checking the manifest of the annotation processor
             # JAR), so we don't want to use it unless the javac command does
             if self.args.processor is not None:
-                processor = '%s,%s' % (config.ANNOT_PROCESSOR_NAMES,
-                                       self.args.processor)
+                processor = '{infer_processors},{original_processors}'.format(
+                    infer_processors=config.ANNOT_PROCESSOR_NAMES,
+                    original_processors=self.args.processor
+                )
                 javac_args += ['-processor', processor]
 
             with tempfile.NamedTemporaryFile(
@@ -184,8 +186,8 @@ class CompilerCall(object):
                 annot_out.write('{}')
                 self.suppress_warnings_out = annot_out.name
             javac_args += ['-A%s=%s' %
-                          (config.SUPRESS_WARNINGS_OUTPUT_FILENAME_OPTION,
-                           self.suppress_warnings_out)]
+                           (config.SUPRESS_WARNINGS_OUTPUT_FILENAME_OPTION,
+                            self.suppress_warnings_out)]
 
             def arg_must_go_on_cli(arg):
                 # as mandated by javac, argument files must not contain
@@ -241,7 +243,7 @@ class AnalyzerWithFrontendWrapper(analyze.AnalyzerWrapper):
         self.javac = CompilerCall(javac_cmd, javac_args)
         if not self.javac.args.version:
             if javac_args is None:
-                help_exit('No javac command detected')
+                raise Exception('No javac command detected')
 
         analyze.AnalyzerWrapper.__init__(self, args)
 
@@ -325,7 +327,6 @@ class AnalyzerWithFrontendWrapper(analyze.AnalyzerWrapper):
         if self.args.android_harness:
             infer_cmd.append('-harness')
 
-
         return analyze.run_command(
             infer_cmd,
             self.args.debug,

infer/lib/python/inferlib/source.py

@@ -12,12 +12,13 @@ from __future__ import unicode_literals
 
 import codecs
 
-from . import colorize, config, utils
+from . import colorize, config
 
 BASE_INDENT = 2
 # how many lines of context around each report
 SOURCE_CONTEXT = 2
 
+
 class Indenter(str):
     def __init__(self):
         super(Indenter, self).__init__()

infer/lib/python/inferlib/utils.py

@@ -20,7 +20,6 @@ import logging
 import os
 import subprocess
 import sys
-import tempfile
 import time
 
 from . import config
@@ -218,7 +217,6 @@ class Timer:
         return self._dt
 
 
-
 def interact():
     """Start interactive mode. Useful for debugging.
     """