examples/scripts.noah/source.bash

   1 # source.bash
   2 # Author: Noah Friedman <friedman@prep.ai.mit.edu>
   3 # Created: 1992-05-17
   4 # Last modified: 1993-09-29
   5 # Public domain
   6
   7 # Commentary:
   8 # Code:
   9
  10 #:docstring source:
  11 # Usage: source file ...
  12 #
  13 # Source forces file arguments to be considered in the current directory
  14 # only, unless there is an absolute path starting with `/'.  I think it's
  15 # bad that the builtin "source" searches PATH, because PATH normally
  16 # contains directories with binary files that aren't useful for bash to
  17 # read and most people don't put "." first in their path.
  18 #
  19 # This "source" is capable of reading more than one file at a time.  Return
  20 # value is number of failed source attempts.
  21 #:end docstring:
  22
  23 # This function is not hygienic, but there's not much we can do about
  24 # variable name conflicts here.
  25
  26 ###;;;autoload
  27 function source ()
  28 {
  29     local -i _source_failure_count=0
  30     local _source_file
  31
  32     for _source_file ; do
  33        # Check first part of each filename.  If it's not `/', `./', or
  34        # `../' then prepend "./" to the path to force the builtin `source'
  35        # not to go searching through PATH to find the file.
  36        case "${_source_file}" in
  37           /*|./*|../* ) ;;
  38           * ) _source_file="./${_source_file}" ;;
  39        esac
  40
  41        builtin source "${_source_file}" ||
  42          _source_failure_count="_source_failure_count + 1"
  43
  44     done
  45
  46     return ${_source_failure_count}
  47 }
  48
  49 #:docstring .:
  50 # See "source"
  51 #:end docstring:
  52
  53 # So that `.' will call function definition of `source' instead of builtin
  54
  55 ###;;;autoload
  56 function . ()
  57 {
  58     source "$@"
  59 }
  60
  61 provide source
  62
  63 # source.bash ends here