use bufio.Reader instead of bufio.Scanner

[0tarof]

gomockhandler check is failed when scan the large single line file.
Because os of hard limit of bufio.Scanner.

So use bufio.Reader to scan first line of file.

P.S.
There is another approach like filtering target files using extension, etc...

[sanposhiho]

Thanks for opening PR. I'll review it later.

Because os hard limit of bufio.Scanner.

I don't know about that. 😓

[0tarof]

bufio.Scanner has default token size defained at bufio.MaxScanToken.
Ref: https://cs.opensource.google/go/go/+/refs/tags/go1.17.5:src/bufio/scan.go;l=81;bpv=1;bpt=1

if line length is greater than maxTokenSize, then Scanner.Scan function is failed with bufio.ErrTooLong.

In my case, gomockhandler scans large json configuration file on directory tree, then the command failed with that error.

[sanposhiho]

Please change it to be simpler.

if cont {
 for {
// ...
 if !cont {
  break
 }
 }
}

↓

for cont {
// ...
}

[0tarof]

Thanks. I fixed it.

[sanposhiho]

@0tarof
Thanks for your contribution 👍
勉強になりました :)