FSE '21 paper implementation (preprint)
DOI of submitted version executable file of NIL is 10.5281/zenodo.4492665.

NIL

NIL is a clone detector using N-gram, Inverted index, and LCS. NIL provides scalable large-variance clone detection.

Requirements

Clone this repository (git clone https://github.com/kusumotolab/NIL)
Move into NIL's directory (cd NIL) and build NIL (./gradlew ShadowJar)
Run NIL (java -jar ./build/libs/NIL-all.jar [options])
Check the result file
- If you didn't specify -bce option, the format is /path/to/file_A,start_line_A,end_line_A,/path/to/file_B,start_line_B,end_line_B.
- If you specified -bce option, the format is dir_A,file_A,start_line_A,end_line_A,dir_B,file_B,start_line_B,end_line_B

Name	Description	Default
`-s`,`--src`	Input source directory. You must specify the target dir.	None
`-mil`,`--min-line`	Minimum number of lines that a code fragment must be to be treated as a clone.	`6`
`-mit`,`--min-token`	Minimum number of tokens that a code fragment must be to be treated as a clone.	`50`
`-n`,`--n-gram`	N for N-gram.	`5`
`-p`,`--partition-size`	The number of partitions.	`10`
`-f`,`--filtration-threshold`	Threshold used in the filtration phase (%).	`10`
`-v`,`--verification-threshold`	Threshold used in the verificatioin phase (%).	`70`
`-o`,`--output`	Output file name.	`result_{n}_{f}_{v}.csv`
`-t`,`--threads`	The number of threads used for parallel execution (both the Preprocess and Clone detection phases)	all threads
`-l`,`--language`	Target language	`java`
`-bce`,`--bigcloneeval`	If you specify `-bce` option, NIL outputs result file feasible to BigCloneEval.	not specified
`-mif`,`--mutationinjectionframework`	If you specify `-mif` option, NIL outputs nothing except for the output file name as standard output.	not specified

If you execute NIL on 250-MLOC codebase, we recommend -p option to 135.