view tests/test-check-code.t @ 19290:f21f4a1b6c24

log: move log file walk to its own function

This moves the logic that determines which changesets to process during a
'hg log foo.txt' command. Putting it in its own function allows extensions
to modify how the file log is traversed. For instance, the current
implementation uses filelog revs heavily. Other implementations may not have
filelog revs available.

The function throws an exception if the traversal is not possible via the
filelog, so the parent function can do things the slow way if necessary
(by walking the entire commit history).

Aside from the exception throwing, no logic is changed.

  $ 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 > non-py24.py <<EOF
  > # Using builtins that does not exist in Python 2.4
  > if any():
  >     x = all()
  >     y = format(x)
  > 
  > # Do not complain about our own definition
  > def any(x):
  >     pass
  > 
  > # try/except/finally block does not exist in Python 2.4
  >     try:
  >         pass
  >     except StandardError, inst:
  >         pass
  >     finally:
  >         pass
  > 
  > # nested try/finally+try/except is allowed
  >     try:
  >         try:
  >             pass
  >         except StandardError, inst:
  >             pass
  >     finally:
  >         pass
  > 
  > # yield inside a try/finally block is not allowed in Python 2.4
  >     try:
  >         pass
  >         yield 1
  >     finally:
  >         pass
  >     try:
  >         yield
  >         pass
  >     finally:
  >         pass
  > 
  > 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 ./non-py24.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
  ./non-py24.py:2:
   > if any():
   any/all/format not available in Python 2.4
  ./non-py24.py:3:
   >     x = all()
   any/all/format not available in Python 2.4
  ./non-py24.py:4:
   >     y = format(x)
   any/all/format not available in Python 2.4
  ./non-py24.py:11:
   >     try:
   no try/except/finally in Python 2.4
  ./non-py24.py:28:
   >     try:
   no yield inside try/finally in Python 2.4
  ./non-py24.py:33:
   >     try:
   no yield inside try/finally in Python 2.4
  ./classstyle.py:4:
   > class oldstyle_class:
   old-style class, use class foo(object)
  ./classstyle.py:7:
   > class empty():
   class foo() not available in Python 2.4, use class foo(object)
  [1]
  $ cat > python3-compat.py << EOF
  > foo <> bar
  > reduce(lambda a, b: a + b, [1, 2, 3, 4])
  > 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+
  [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 > raise-format.py <<EOF
  > raise SomeException, message
  > # this next line is okay
  > raise SomeException(arg1, arg2)
  > EOF
  $ "$check_code" raise-format.py
  raise-format.py:1:
   > raise SomeException, message
   don't use old-style two-argument raise, use Exception(message)
  [1]