The `zip-service` compresses `top` top largest files from a specified directory and zips them into a `zip` file or extracts a `zip` file into a directory. Several compression methods are implemented, gzip, flate, lzw, zlib. Compression/extraction process is performed in parallel using `nthreads` threads. Selecting top files is also parallelized. Files for compression/extraction can be selected via `pattern` 

#Compilation 
To compile the program, run 
`cd cmd` 
`go build -o zip-service` 

#Testing
To run all tests from `zip-service` directory, run 
`go test ./...` 

#Running 
`./zip-service [flags]`  
Flags 
 `-c` or `-compress`: Perform compression
 `-d <dir>` or `-dir <dir>`: Directory to compress files from or extract files to
 `-e` or `-extract`: Perform extraction
 `-f <file>` or `-file <file>`: ZIP file to compress to or extract from
 `-m <method>` or `-method <method>`: Select compression method from gzip, flate, lzw, zlib (default "gzip")
 `-n <threads>` or `-nthreads <threads>`: Number of threads (default 1)
 `-p <pattern>` or `-pattern <pattern>`: Use pattern to filter files (default "*") 
 `-t <top>` or `-top <top>`: Select top files to compress/extract (default 10)
Notes: 
 - One and only one of -c and -e should be set 
Example: 
  `./zip-service -c -d DIR -f file.zip`