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lang-bash
COMPREPLYis an array of possible completions, and thecomp*buil-ins are mostlly easy ways to generate these completions? How are spaced handled? Your answer doesn't seem to support spaces in verbs (curve ball, I know). Your file completion woudl also list all the files, I had to change it tocompgen -G "${COMP_WORDS[COMP_CWORD]}*.txt"to have the expected completions, but this still doesn't work if there are files with spaces in the filename.local IFS=$'\n'in your completion function. To deal with newlines or wildcard characters in file names, use zsh.bash_completion: use its_filedirfunction.