Simple golang program to change the file extension of a file.
Assuming golang is installed, run the following to clone the repository and install go-file-renamer.
go get -u github.com/garrettcorn/go-file-renamer
go install github.com/garrettcorn/go-file-renamer
If $GOPATH/bin is in the PATH, go-file-renamer's help can be viewed running the following.
go-file-renamer --help
Open your .bashrc with your editor of choice.
code ~/.bashrc
append $GOPATH/bin to your PATH by adding the following line to your .bashrc file
export PATH=$PATH:$GOPATH/bin
By default go-file-renamer will automatically change all of the files with the rar extension in the current working directory to mkv. To configure go-file-renamer simply provide -from and -to flags with the desired options. For example, to change all files in the current directory from foo to bar run the following.
go-file-renamer -from foo -to bar