Showing 20 of 20 total issues
Method tunnel_pid
has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring. Open
def tunnel_pid(local_port, raise_on_closed_port = true)
# Check if local port is open, get proxy process PID
pid_result = shell_out("lsof -nPt -i4TCP:#{local_port} -sTCP:LISTEN")
unless pid_result.status.success?
if raise_on_closed_port
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Cognitive Complexity
Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.
A method's cognitive complexity is based on a few simple rules:
- Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
- Code is considered more complex for each "break in the linear flow of the code"
- Code is considered more complex when "flow breaking structures are nested"
Further reading
Identical blocks of code found in 2 locations. Consider refactoring. Open
def run
initialize_params
# Retrieve proxy process PID. Raises an error if something is wrong
proxy_pid = tunnel_pid(@local_port)
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Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 30.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Identical blocks of code found in 2 locations. Consider refactoring. Open
def run
initialize_params
# Retrieve proxy process PID. Raises an error if something is wrong
proxy_pid = tunnel_pid(@local_port)
- Read upRead up
Duplicated Code
Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:
Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.
When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).
Tuning
This issue has a mass of 30.
We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.
The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.
If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.
See codeclimate-duplication
's documentation for more information about tuning the mass threshold in your .codeclimate.yml
.
Refactorings
- Extract Method
- Extract Class
- Form Template Method
- Introduce Null Object
- Pull Up Method
- Pull Up Field
- Substitute Algorithm
Further Reading
- Don't Repeat Yourself on the C2 Wiki
- Duplicated Code on SourceMaking
- Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76
Use a guard clause instead of wrapping the code inside a conditional expression. Open
if pid
- Read upRead up
- Exclude checks
Use a guard clause instead of wrapping the code inside a conditional expression
Example:
# bad
def test
if something
work
end
end
# good
def test
return unless something
work
end
# also good
def test
work if something
end
# bad
if something
raise 'exception'
else
ok
end
# good
raise 'exception' if something
ok
Do not use ::
for method calls. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = '127.0.0.1', @local_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = old_socks_server, old_socks_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use parallel assignment. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = old_socks_server, old_socks_port
- Read upRead up
- Exclude checks
Checks for simple usages of parallel assignment. This will only complain when the number of variables being assigned matched the number of assigning variables.
Example:
# bad
a, b, c = 1, 2, 3
a, b, c = [1, 2, 3]
# good
one, two = *foo
a, b = foo()
a, b = b, a
a = 1
b = 2
c = 3
Prefer $PROGRAM_NAME
over $0
. Open
spec.signing_key = File.expand_path("~/.ssh/gem-eligible.pem") if $0 =~ /gem\z/
- Exclude checks
Do not use ::
for method calls. Open
TCPSocket::socks_server = "127.0.0.1"
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
old_socks_server, old_socks_port = ::TCPSocket::socks_server, ::TCPSocket::socks_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
TCPSocket::socks_server = "127.0.0.1"
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = '127.0.0.1', @local_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = old_socks_server, old_socks_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use ::
for method calls. Open
old_socks_server, old_socks_port = ::TCPSocket::socks_server, ::TCPSocket::socks_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use parallel assignment. Open
::TCPSocket::socks_server, ::TCPSocket::socks_port = '127.0.0.1', @local_port
- Read upRead up
- Exclude checks
Checks for simple usages of parallel assignment. This will only complain when the number of variables being assigned matched the number of assigning variables.
Example:
# bad
a, b, c = 1, 2, 3
a, b, c = [1, 2, 3]
# good
one, two = *foo
a, b = foo()
a, b = b, a
a = 1
b = 2
c = 3
Do not use ::
for method calls. Open
TCPSocket::socks_port = @local_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Prefer $CHILD_STATUS
from the stdlib 'English' module (don't forget to require it) over $?
. Open
if $?.exitstatus == 0
- Exclude checks
Do not use ::
for method calls. Open
TCPSocket::socks_port = @local_port
- Read upRead up
- Exclude checks
This cop checks for methods invoked via the :: operator instead of the . operator (like FileUtils::rmdir instead of FileUtils.rmdir).
Example:
# bad
Timeout::timeout(500) { do_something }
FileUtils::rmdir(dir)
Marshal::dump(obj)
# good
Timeout.timeout(500) { do_something }
FileUtils.rmdir(dir)
Marshal.dump(obj)
Do not use parallel assignment. Open
old_socks_server, old_socks_port = ::TCPSocket::socks_server, ::TCPSocket::socks_port
- Read upRead up
- Exclude checks
Checks for simple usages of parallel assignment. This will only complain when the number of variables being assigned matched the number of assigning variables.
Example:
# bad
a, b, c = 1, 2, 3
a, b, c = [1, 2, 3]
# good
one, two = *foo
a, b = foo()
a, b = b, a
a = 1
b = 2
c = 3
Use a guard clause instead of wrapping the code inside a conditional expression. Open
if proxy_pid
- Read upRead up
- Exclude checks
Use a guard clause instead of wrapping the code inside a conditional expression
Example:
# bad
def test
if something
work
end
end
# good
def test
return unless something
work
end
# also good
def test
work if something
end
# bad
if something
raise 'exception'
else
ok
end
# good
raise 'exception' if something
ok