dupl is a tool for finding code clones written in Go. So far it can find clones only in the Go source files. The method uses suffix tree for serialized ASTs. It ignores values of AST nodes, it cares just about the types.
go get -u github.com/mibk/duplTo be built, dupl requires Go 1.4 or later.
Usage of dupl:
dupl [flags] [paths]
Paths:
If the given path is a file, dupl will use it regardless of
the file extension. If it is a directory it will recursively
search for *.go files in that directory.
If no path is given dupl will recursively search for *.go
files in the current directory.
Flags:
-c, -connect addr:port
connect to the given 'addr:port'
-files
read file names from stdin one at each line
-html
output the results as HTML, including duplicate code fragments
-plumbing
plumbing (easy-to-parse) output for consumption by scripts or tools
-serve port
run server at port
-t, -threshold size
minimum token sequence size as a clone (default 15)
-v, -verbose
explain what is being done
Examples:
dupl -t 100
Search clones in the current directory of size at least
100 tokens.
dupl $(find app/ -name '*_test.go')
Search for clones in tests in the app directory.
find app/ -name '*_test.go' |dupl -files
The same as above.
The reduced output of this command with the following parameters for the Docker source code looks like this.
$ dupl -t 200 -html >docker.html