Below are the regex for filtering out all the non go files (i.e those with '.go' extension)
^([\S]*[^.][^g][^o]|[\S]*.[^g].|[\S]*..[^o]$|[\S]*[^.]..|[\S]{1,2})$
^([^.]*)($|[.]($|[\S]$|g[^o]$|[^g]o$|[^g][^o]$|([\S]+)\.($|.$|g[^o]$|[^g]o$|[^g][^o]$|[^.]{3,}$)|[^.]{3,}$))
You can test them here (click on try it 'Go' in the menu below the regex)
While they seem to work correctly in go but not with inotifywait's exclude filter (which uses posix ERE format)
I am trying to setup a "watch and reload" task in my Makefile for a golang project. Also i am assuming file or folders names dont have spaces.
You may use
\.[^.][^.][^.]+$|\.[^.][^o]$|\.[^g][^.]$|\.[^.]$
See demo
Or if you can group:
\.([^.][^.][^.]+|[^.][^o]|[^g][^.]|[^.])$
See demo
See explanation:
\. - a literal dot([^.][^.][^.]+|[^.][^o]|[^g][^.]|[^.]) - a group of alternatives:[^.][^.][^.]+ - 2 characters other than . and 1 or more characters other than ....[^.][^o] - a character other than a dot and a character other than o...[^g][^.] - a character other than g and a character other than a dot...[^.] - a character other than a dot...$ - right before the end of string.Got the issue. It seems [:graph:] not \S the class identifier for non-space chars in extended posix. The below is good to go.
^[[:graph:]]*[^.][^g][^o]$|^[[:graph:]]{1,2}$|^[[:graph:]]*.[^g].$|^[[:graph:]]*..[^o]$|^[[:graph:]]*[^.]..$
or even a better one from stribizhev comment [^.][^g][^o]$|^..$|.[^g].$|..[^o]$|[^.]..$