get-conflicting-names

#!/bin/bash
#
# Usage: get-conflicting-names 
# Prints (one per line) already defined aliases whose names conflict with names defined in standardrc.

# Parameters: $1 - filename
# Returns: List of aliases defined in file, one per line.
getAliasesFromFile() {
  grep -v "^[[:blank:]]*#" "$1" \
    | grep -Po "^alias [^=]+" \
    | sed 's/^alias //g'
}

# Prints names of all aliases defined in .bashrc, .profile and
# .bash_aliases.
getDefinedAliases() {
  getAliasesFromFile ~/.bashrc 2> /dev/null
  getAliasesFromFile ~/.profile 2> /dev/null
  getAliasesFromFile ~/.bash_aliases 2> /dev/null
  getAliasesFromFile ~/.bash_profile 2> /dev/null
  getAliasesFromFile ~/.bash_login 2> /dev/null
  getAliasesFromFile /etc/profile 2> /dev/null
  getAliasesFromFile /etc/profile.d/colorls.sh 2> /dev/null
}

# Prints all short function names defined in projects
# standard_rc, one per line.
getShortFunctionNames() {
  grep -v "^[[:blank:]]*#" ../standard_rc \
    | grep -v ";" \
    | grep ":" \
    | sed 's/:.*$//g' \
    | tr -d ' ' \
    | sed 's/,/\n/g'
}

main() {
  (getDefinedAliases;
  getShortFunctionNames) \
  | sort \
  | uniq -d
}

main "$@"