user-tools/cdexec

   1 #!/bin/bash
   2
   3 true <<EOF
   4 =pod
   5
   6 =head1 NAME
   7
   8 cdexec - Run a given command in the given directory
   9
  10 =head1 SYNOPSIS
  11
  12 cdexec [--home | <B<DIRECTORY>>] [--] <B<COMMAND>> [<B<ARGS>>]
  13
  14 Run a given command in the given directory.
  15 Set the target directory to the command's self directory if not given.
  16
  17 =head1 SEE ALSO
  18
  19 execline-cd by execlineb(1)
  20
  21 =cut
  22
  23 EOF
  24
  25
  26 set -e
  27 set -o pipefail
  28 set -u
  29
  30 cd_into=''
  31
  32 while [ $# != 0 ]
  33 do
  34         case "$1" in
  35         --help)
  36                 echo "Usage: $0 [--home | <DIRECTORY>] [--] <COMMAND> [<ARGS>]"
  37                 echo "Run a command in a specific directory."
  38                 echo "If DIRECTORY is not given and COMMAND is a path, chdir into COMMAND's directory."
  39                 exit
  40                 ;;
  41         --)
  42                 shift
  43                 break
  44                 ;;
  45         --home)
  46                 cd_into=$HOME
  47                 ;;
  48         -*)
  49                 # ignore
  50                 true
  51                 ;;
  52         *)
  53                 if [ -z "$cd_into" ]
  54                 then
  55                         cd_into=$1
  56                 else
  57                         # command follows
  58                         break
  59                 fi
  60                 ;;
  61         esac
  62         shift
  63 done
  64
  65 if [ $# = 0 -a -n "$cd_into" ]
  66 then
  67         # no command given. probably the only parameter is meant to be the command, not the target directory.
  68         set -- "$cd_into"
  69         cd_into=''
  70 fi
  71
  72 if [ -z "$cd_into" ]
  73 then
  74         # target directory is the command's self directory
  75         cmd=$1
  76         if [[ $cmd =~ / ]]
  77         then
  78                 cd_into=`dirname -- "$cmd"`
  79         else
  80                 echo "cdexec: no target directory given." >&2
  81                 exit -1
  82         fi
  83 fi
  84
  85 cd "$cd_into"
  86 exec "$@"