view tests/test-contrib-check-code.t @ 35540:f948c5b3f5c9 stable

run-tests: avoid set PYTHONUSERBASE environment variable to None

According to python documentation, get_config_var can return None and it was
during running mercurial tests under a virtual environment with the local built
mercurial installed as a python package with `pip install -e .`.

On the other hand, if mercurial is installed in the user library folders with
`pip install --local -e .` the issue doesn't reproduce.

The fallback is that it will just set an empty string and everything should work
as before, according to https://www.python.org/dev/peps/pep-0370/:

    The path to the user base directory can be overwritten with the environment
    variable PYTHONUSERBASE. The default location is used when PYTHONUSERBASE is
    not set or empty.

  $ cat > correct.py <<EOF
  > def toto(arg1, arg2):
  >     del arg2
  >     return (5 + 6, 9)
  > EOF
  $ cat > wrong.py <<EOF
  > def toto( arg1, arg2):
  >     del(arg2)
  >     return ( 5+6, 9)
  > EOF
  $ cat > quote.py <<EOF
  > # let's use quote in comments
  > (''' ( 4x5 )
  > but """\\''' and finally''',
  > """let's fool checkpatch""", '1+2',
  > '"""', 42+1, """and
  > ( 4-1 ) """, "( 1+1 )\" and ")
  > a, '\\\\\\\\', "\\\\\\" x-2", "c-1"
  > EOF
  $ cat > classstyle.py <<EOF
  > class newstyle_class(object):
  >     pass
  > 
  > class oldstyle_class:
  >     pass
  > 
  > class empty():
  >     pass
  > 
  > no_class = 1:
  >     pass
  > EOF
  $ check_code="$TESTDIR"/../contrib/check-code.py
  $ "$check_code" ./wrong.py ./correct.py ./quote.py ./classstyle.py
  ./wrong.py:1:
   > def toto( arg1, arg2):
   gratuitous whitespace in () or []
  ./wrong.py:2:
   >     del(arg2)
   Python keyword is not a function
  ./wrong.py:3:
   >     return ( 5+6, 9)
   gratuitous whitespace in () or []
   missing whitespace in expression
  ./quote.py:5:
   > '"""', 42+1, """and
   missing whitespace in expression
  ./classstyle.py:4:
   > class oldstyle_class:
   old-style class, use class foo(object)
  ./classstyle.py:7:
   > class empty():
   class foo() creates old style object, use class foo(object)
  [1]
  $ cat > python3-compat.py << EOF
  > foo <> bar
  > reduce(lambda a, b: a + b, [1, 2, 3, 4])
  > dict(key=value)
  > EOF
  $ "$check_code" python3-compat.py
  python3-compat.py:1:
   > foo <> bar
   <> operator is not available in Python 3+, use !=
  python3-compat.py:2:
   > reduce(lambda a, b: a + b, [1, 2, 3, 4])
   reduce is not available in Python 3+
  python3-compat.py:3:
   > dict(key=value)
   dict() is different in Py2 and 3 and is slower than {}
  [1]

  $ cat > foo.c <<EOF
  > void narf() {
  > 	strcpy(foo, bar);
  > 	// strcpy_s is okay, but this comment is not
  > 	strcpy_s(foo, bar);
  > }
  > EOF
  $ "$check_code" ./foo.c
  ./foo.c:2:
   > 	strcpy(foo, bar);
   don't use strcpy, use strlcpy or memcpy
  ./foo.c:3:
   > 	// strcpy_s is okay, but this comment is not
   don't use //-style comments
  [1]

  $ cat > is-op.py <<EOF
  > # is-operator comparing number or string literal
  > x = None
  > y = x is 'foo'
  > y = x is "foo"
  > y = x is 5346
  > y = x is -6
  > y = x is not 'foo'
  > y = x is not "foo"
  > y = x is not 5346
  > y = x is not -6
  > EOF

  $ "$check_code" ./is-op.py
  ./is-op.py:3:
   > y = x is 'foo'
   object comparison with literal
  ./is-op.py:4:
   > y = x is "foo"
   object comparison with literal
  ./is-op.py:5:
   > y = x is 5346
   object comparison with literal
  ./is-op.py:6:
   > y = x is -6
   object comparison with literal
  ./is-op.py:7:
   > y = x is not 'foo'
   object comparison with literal
  ./is-op.py:8:
   > y = x is not "foo"
   object comparison with literal
  ./is-op.py:9:
   > y = x is not 5346
   object comparison with literal
  ./is-op.py:10:
   > y = x is not -6
   object comparison with literal
  [1]

  $ cat > for-nolineno.py <<EOF
  > except:
  > EOF
  $ "$check_code" for-nolineno.py --nolineno
  for-nolineno.py:0:
   > except:
   naked except clause
  [1]

  $ cat > warning.t <<EOF
  >   $ function warnonly {
  >   > }
  >   $ diff -N aaa
  >   $ function onwarn {}
  > EOF
  $ "$check_code" warning.t
  $ "$check_code" --warn warning.t
  warning.t:1:
   >   $ function warnonly {
   warning: don't use 'function', use old style
  warning.t:3:
   >   $ diff -N aaa
   warning: don't use 'diff -N'
  warning.t:4:
   >   $ function onwarn {}
   warning: don't use 'function', use old style
  [1]
  $ cat > error.t <<EOF
  >   $ [ foo == bar ]
  > EOF
  $ "$check_code" error.t
  error.t:1:
   >   $ [ foo == bar ]
   [ foo == bar ] is a bashism, use [ foo = bar ] instead
  [1]
  $ rm error.t
  $ cat > raise-format.py <<EOF
  > raise SomeException, message
  > # this next line is okay
  > raise SomeException(arg1, arg2)
  > EOF
  $ "$check_code" not-existing.py raise-format.py
  Skipping*not-existing.py* (glob)
  raise-format.py:1:
   > raise SomeException, message
   don't use old-style two-argument raise, use Exception(message)
  [1]

  $ cat > rst.py <<EOF
  > """problematic rst text
  > 
  > .. note::
  >     wrong
  > """
  > 
  > '''
  > 
  > .. note::
  > 
  >     valid
  > 
  > new text
  > 
  >     .. note::
  > 
  >         also valid
  > '''
  > 
  > """mixed
  > 
  > .. note::
  > 
  >   good
  > 
  >     .. note::
  >         plus bad
  > """
  > EOF
  $ $check_code -w rst.py
  rst.py:3:
   > .. note::
   warning: add two newlines after '.. note::'
  rst.py:26:
   >     .. note::
   warning: add two newlines after '.. note::'
  [1]

  $ cat > ./map-inside-gettext.py <<EOF
  > print(_("map inside gettext %s" % v))
  > 
  > print(_("concatenating " " by " " space %s" % v))
  > print(_("concatenating " + " by " + " '+' %s" % v))
  > 
  > print(_("mapping operation in different line %s"
  >         % v))
  > 
  > print(_(
  >         "leading spaces inside of '(' %s" % v))
  > EOF
  $ "$check_code" ./map-inside-gettext.py
  ./map-inside-gettext.py:1:
   > print(_("map inside gettext %s" % v))
   don't use % inside _()
  ./map-inside-gettext.py:3:
   > print(_("concatenating " " by " " space %s" % v))
   don't use % inside _()
  ./map-inside-gettext.py:4:
   > print(_("concatenating " + " by " + " '+' %s" % v))
   don't use % inside _()
  ./map-inside-gettext.py:6:
   > print(_("mapping operation in different line %s"
   don't use % inside _()
  ./map-inside-gettext.py:9:
   > print(_(
   don't use % inside _()
  [1]

web templates

  $ mkdir -p mercurial/templates
  $ cat > mercurial/templates/example.tmpl <<EOF
  > {desc}
  > {desc|escape}
  > {desc|firstline}
  > {desc|websub}
  > EOF

  $ "$check_code" --warnings mercurial/templates/example.tmpl
  mercurial/templates/example.tmpl:2:
   > {desc|escape}
   warning: follow desc keyword with either firstline or websub
  [1]

'string join across lines with no space' detection

  $ cat > stringjoin.py <<EOF
  > foo = (' foo'
  >        'bar foo.'
  >        'bar foo:'
  >        'bar foo@'
  >        'bar foo%'
  >        'bar foo*'
  >        'bar foo+'
  >        'bar foo-'
  >        'bar')
  > EOF

'missing _() in ui message' detection

  $ cat > uigettext.py <<EOF
  > ui.status("% 10s %05d % -3.2f %*s %%"
  >           # this use '\\\\' instead of '\\', because the latter in
  >           # heredoc on shell becomes just '\'
  >           '\\\\ \n \t \0'
  >           """12345
  >           """
  >           '''.:*+-=
  >           ''' "%-6d \n 123456 .:*+-= foobar")
  > EOF

superfluous pass

  $ cat > superfluous_pass.py <<EOF
  > # correct examples
  > if foo:
  >     pass
  > else:
  >     # comment-only line means still need pass
  >     pass
  > def nothing():
  >     pass
  > class empty(object):
  >     pass
  > if whatever:
  >     passvalue(value)
  > # bad examples
  > if foo:
  >     "foo"
  >     pass
  > else: # trailing comment doesn't fool checker
  >     wat()
  >     pass
  > def nothing():
  >     "docstring means no pass"
  >     pass
  > class empty(object):
  >     """multiline
  >     docstring also
  >     means no pass"""
  >     pass
  > EOF

(Checking multiple invalid files at once examines whether caching
translation table for repquote() works as expected or not. All files
should break rules depending on result of repquote(), in this case)

  $ "$check_code" stringjoin.py uigettext.py superfluous_pass.py
  stringjoin.py:1:
   > foo = (' foo'
   string join across lines with no space
  stringjoin.py:2:
   >        'bar foo.'
   string join across lines with no space
  stringjoin.py:3:
   >        'bar foo:'
   string join across lines with no space
  stringjoin.py:4:
   >        'bar foo@'
   string join across lines with no space
  stringjoin.py:5:
   >        'bar foo%'
   string join across lines with no space
  stringjoin.py:6:
   >        'bar foo*'
   string join across lines with no space
  stringjoin.py:7:
   >        'bar foo+'
   string join across lines with no space
  stringjoin.py:8:
   >        'bar foo-'
   string join across lines with no space
  uigettext.py:1:
   > ui.status("% 10s %05d % -3.2f %*s %%"
   missing _() in ui message (use () to hide false-positives)
  superfluous_pass.py:14:
   > if foo:
   omit superfluous pass
  superfluous_pass.py:17:
   > else: # trailing comment doesn't fool checker
   omit superfluous pass
  superfluous_pass.py:20:
   > def nothing():
   omit superfluous pass
  superfluous_pass.py:23:
   > class empty(object):
   omit superfluous pass
  [1]