pecker
is a tool to automatically detect unused code. It based on IndexStoreDB and SwiftSyntax.
If you have questions, feel free to connect me, my Twitter Roy, Email: roy.cao1991@gmail.com
.
Language Switch: 中文.
During the project development process, you may write a lot of code. Over time, a lot of code is no longer used, but it is difficult to find. pecker
can help you locate these unused code conveniently and accurately.
pecker
can detect the following kinds of unused Swift code.
- class
- struct
- enum
- protocol
- function
- typealias
- operator
$ git clone https://github.com/woshiccm/Pecker.git
$ cd Pecker
$ make install
mint install woshiccm/Pecker
With that installed and on our bin
folder, now we can use it.
- Click on your project in the file list, choose your target under TARGETS, click the Build Phases tab and add a New Run Script Phase by clicking the little plus icon in the top left.
- Paste the following script:
/usr/local/bin/pecker
pecker [OPTIONS]
-v/--version
: Prints thepecker
version and exits.-i/--index-store-path
: The Index path of your project, if unspecified, the default is ~Library/Developer/Xcode/DerivedData//Index/DataStore.
Run pecker
in the project target to detect. Project will be searched Swift files recursively.
Current only 2 rules are included in Pecker, They are skip_public
and xctest
, You can also check Source/PeckerKit/Rules directory to see their implementation.
This rule means skip detect public class, struct, function, etc. Usually the public code is provided for other users, so it is difficult to determine whether it is used. So we don't detect it by default. But in some cases, such as using submodule
to organize code, you need to detect public code, you can add it to disabled_rules
.
XCTest is special, we stipulate that ignore classes inherited from XCTestCase and functions of this class that hasPrefix "test" and do not contain parameters. You can add it to disabled_rules
if you don't need it.
class ExampleUITests: XCTestCase {
func testExample() { //used
}
func test(name: String) { // unused
}
func get() { // unsed
}
}
These rules are used by default, you cannot configure them.
override
Skip declarations that override another. This works for both subclass overrides & protocol extension overrides.
protocol ExampleProtocol {
func test() // used
}
class Example: ExampleProtocol {
func test() { // used
}
}
class Animal {
func run() { // used
}
}
class Dod: Animal {
override func run() { // used
}
}
extensions
Referenced elsewhere means used, except for extensions.
class UnusedExample { // unused
}
extension UnusedExample {
}
Configure pecker
by adding a .pecker.yml
file from the directory you'll
run pecker
from. The following parameters can be configured:
Rule inclusion:
disabled_rules
: Disable rules from the default enabled set.
Reporter inclusion:
- xcode: Warnings displayed in the IDE.
- json: Generate a warnings json file.
reporter: "xcode"
disabled_rules:
- skip_public
included: # paths to include during detecting. `--path` is ignored if present.
- ./
excluded: # paths to ignore during detecting. Takes precedence over `included`.
- Carthage
- Pods
blacklist_files: # files to ignore during detecting, only need to add file name, the file extension default is swift.
- HomeViewController
blacklist_symbols: # symbols to ignore during detecting, contains class, struct, enum, etc.
- AppDelegate
- viewDidLoad
pecker
is developed completely in the open.
Any contributing and pull requests are warmly welcome. If you are interested in developing pecker
, submit ideas and submit pull requests!
pecker
is released under the MIT License.