#!/usr/bin/env bash
# Üllar Seerme
#
# The input file should consist of LDAP UIDs on every line in the 
# form of firstname.lastname. This input produces an output like:
# "(|(uid=first.last)(uid=first.last))" to STDOUT
#
# The pipe in the beginning denotes a boolean OR-operator, which 
# specifies that at least one specified filter must be true. This 
# kind of output is useful for constructing an LDAP search query 
# where you need to check multiple UIDs. This one-liner can be 
# adapted for other types of queries, and I will update this when
# their necessity will become apparent to me
#
# https://docs.oracle.com/cd/E19528-01/819-0997/gdxpo/index.html

paste -d "" -s <(sed 's/\([[:alpha:]]\{1\}-\w*\|\w*\)\.\(\w*\)/(uid=\1.\2)/g; 1 s/^/"(|/; $ s/$/)"/' $1)