Move pylint sys.path hackery into pylintrc so that any use of pylint gets it

pavelib/quality.py

@@ -57,22 +57,17 @@ def find_fixme(options):
 
         apps_list = ' '.join(top_python_dirs(system))
 
-        pythonpath_prefix = (
-            "PYTHONPATH={system}/djangoapps:common/djangoapps:common/lib".format(
-                system=system
-            )
-        )
-
-        sh(
-            "{pythonpath_prefix} pylint --disable all --enable=fixme "
+        cmd = (
+            "pylint --disable all --enable=fixme "
             "--output-format=parseable {apps} "
             "> {report_dir}/pylint_fixme.report".format(
-                pythonpath_prefix=pythonpath_prefix,
                 apps=apps_list,
                 report_dir=report_dir
             )
         )
 
+        sh(cmd, ignore_error=True)
+
         num_fixme += _count_pylint_violations(
             "{report_dir}/pylint_fixme.report".format(report_dir=report_dir))
 
@@ -109,20 +104,14 @@ def run_pylint(options):
 
         apps_list = ' '.join(top_python_dirs(system))
 
-        pythonpath_prefix = (
-            "PYTHONPATH={system}/djangoapps:common/djangoapps:common/lib".format(
-                system=system
-            )
-        )
-
         sh(
-            "{pythonpath_prefix} pylint {flags} --output-format=parseable {apps} "
+            "pylint {flags} --output-format=parseable {apps} "
             "> {report_dir}/pylint.report".format(
-                pythonpath_prefix=pythonpath_prefix,
                 flags=" ".join(flags),
                 apps=apps_list,
                 report_dir=report_dir
-            )
+            ),
+            ignore_error=True,
         )
 
         num_violations += _count_pylint_violations(
@@ -768,15 +757,9 @@ def run_quality(options):
     eslint_files = get_violations_reports("eslint")
     eslint_reports = u' '.join(eslint_files)
 
-    pythonpath_prefix = (
-        "PYTHONPATH=$PYTHONPATH:lms:lms/djangoapps:cms:cms/djangoapps:"
-        "common:common/djangoapps:common/lib"
-    )
-
     # run diff-quality for pylint.
     if not run_diff_quality(
             violations_type="pylint",
-            prefix=pythonpath_prefix,
             reports=pylint_reports,
             percentage_string=percentage_string,
             branch_string=compare_branch_string,
@@ -787,7 +770,6 @@ def run_quality(options):
     # run diff-quality for eslint.
     if not run_diff_quality(
             violations_type="eslint",
-            prefix=pythonpath_prefix,
             reports=eslint_reports,
             percentage_string=percentage_string,
             branch_string=compare_branch_string,
@@ -801,7 +783,7 @@ def run_quality(options):
 
 
 def run_diff_quality(
-        violations_type=None, prefix=None, reports=None, percentage_string=None, branch_string=None, dquality_dir=None
+        violations_type=None, reports=None, percentage_string=None, branch_string=None, dquality_dir=None
 ):
     """
     This executes the diff-quality commandline tool for the given violation type (e.g., pylint, eslint).
@@ -810,11 +792,10 @@ def run_diff_quality(
     """
     try:
         sh(
-            "{pythonpath_prefix} diff-quality --violations={type} "
+            "diff-quality --violations={type} "
             "{reports} {percentage_string} {compare_branch_string} "
             "--html-report {dquality_dir}/diff_quality_{type}.html ".format(
                 type=violations_type,
-                pythonpath_prefix=prefix,
                 reports=reports,
                 percentage_string=percentage_string,
                 compare_branch_string=branch_string,

pylintrc

@@ -56,6 +56,7 @@
 ignore = ,.git,.tox,migrations,node_modules,.pycharm_helpers
 persistent = yes
 load-plugins = edx_lint.pylint,pylint_django,pylint_celery
+init-hook = "import sys; sys.path.extend(['lms/djangoapps', 'cms/djangoapps', 'common/djangoapps'])"
 
 [MESSAGES CONTROL]
 enable = 
@@ -444,4 +445,4 @@ int-import-graph =
 [EXCEPTIONS]
 overgeneral-exceptions = Exception
 
-# ebf3c66ab89931381f66d2fbf20aa581696156c2
+# cb770bb6272f6fe1edfd74aa1fb912be5541481c

pylintrc_tweaks

 # pylintrc tweaks for use with edx_lint.
 [MASTER]
 ignore+ = ,.git,.tox,migrations,node_modules,.pycharm_helpers
+init-hook="import sys; sys.path.extend(['lms/djangoapps', 'cms/djangoapps', 'common/djangoapps'])"
 
 [BASIC]
 attr-rgx = [a-z_][a-z0-9_]{2,40}$