More tweaks to suppress errors when pyflakes can't be imported

Leo build: 20180203152836

flake8-leo.py

@@ -22,7 +22,10 @@
 #@+node:ekr.20160517182239.10: ** main & helpers
 def main(files):
     '''Call run on all tables in tables_table.'''
-    from flake8 import engine
+    try:
+        from flake8 import engine
+    except Exception:
+        print('can not import flake8')
     config_file = get_flake8_config()
     if config_file:
         style = engine.get_style_guide(

leo/commands/checkerCommands.py

@@ -8,7 +8,7 @@
 import leo.core.leoGlobals as g
 try:
     import flake8
-except ImportError:
+except Exception: # May not be ImportError.
     flake8 = None
 try:
     import pyflakes
@@ -95,7 +95,10 @@ def __init__(self, c, quiet=False):
     #@+node:ekr.20160517133049.2: *3* flake8.check_all
     def check_all(self, paths):
         '''Run flake8 on all paths.'''
-        from flake8 import engine, main
+        try:
+            from flake8 import engine, main
+        except Exception:
+            return
         config_file = self.get_flake8_config()
         if config_file:
             style = engine.get_style_guide(

leo/core/commit_timestamp.json

@@ -1,4 +1,4 @@
 {
-    "asctime": "Sat Feb  3 15:05:16 CST 2018",
-    "timestamp": "20180203150517"
+    "asctime": "Sat Feb  3 15:28:36 CST 2018",
+    "timestamp": "20180203152836"
 }

leo/core/leoAtFile.py

@@ -4278,6 +4278,8 @@ def runPyflakes(self, root, pyflakes_errors_only):
                 x = checkerCommands.PyflakesCommand(self.c)
                 ok = x.run(p=root,pyflakes_errors_only=pyflakes_errors_only)
                 return ok
+            else:
+                return True # Suppress error if pyflakes can not be imported.
         except Exception:
             g.es_exception()
     #@+node:ekr.20090514111518.5665: *6* at.tabNannyNode

pyflakes-leo.py

@@ -44,7 +44,7 @@ def report_version():
     try:
         import flake8
         print('flake8 version: %s' % flake8.__version__)
-    except ImportError:
+    except Exception:
         g.trace('can not import flake8')
 #@+node:ekr.20160518000549.15: ** scanOptions
 def scanOptions():