code.delx.au - dotfiles/blob - .bash/functions

   1 #! bash
   2
   3 # Useful bash functions. This is sourced by the environment file.
   4 # These are available to scripts, but you shouldn't use them in scripts if you
   5 # want them to be portable.
   6
   7
   8 # Usage: pathremove /path/to/bin [PATH]
   9 # Eg, to remove ~/bin from $PATH
  10 #     pathremove ~/bin PATH
  11 function pathremove {
  12         local IFS=':'
  13         local NEWPATH
  14         local DIR
  15         local PATHVARIABLE=${2:-PATH}
  16         for DIR in ${!PATHVARIABLE} ; do
  17                 if [ "${DIR}" != "${1}" ] ; then
  18                         NEWPATH="${NEWPATH:+${NEWPATH}:}${DIR}"
  19                 fi
  20         done
  21         export ${PATHVARIABLE}="${NEWPATH}"
  22 }
  23
  24 # Usage: pathprepend /path/to/bin [PATH]
  25 # Eg, to prepend ~/bin to $PATH
  26 #     pathprepend ~/bin PATH
  27 function pathprepend {
  28         pathremove "${1}" "${2}"
  29         [ -d "${1}" ] || return
  30         local PATHVARIABLE="${2:-PATH}"
  31         export ${PATHVARIABLE}="${1}${!PATHVARIABLE:+:${!PATHVARIABLE}}"
  32 }
  33
  34 # Usage: pathappend /path/to/bin [PATH]
  35 # Eg, to append ~/bin to $PATH
  36 #     pathappend ~/bin PATH
  37 function pathappend {
  38         pathremove "${1}" "${2}"
  39         [ -d "${1}" ] || return
  40         local PATHVARIABLE=${2:-PATH}
  41         export $PATHVARIABLE="${!PATHVARIABLE:+${!PATHVARIABLE}:}${1}"
  42 }
  43
  44 # Usage: ssource /path/to/shellscript
  45 # Checks if the file exists before sourcing it
  46 function ssource {
  47         [ -r "${1}" ] && source "${1}"
  48 }
  49
  50 # Sets colours to be appropriate for a light on dark terminal
  51 function darkterm {
  52         DARK=1
  53         source "${HOME}/.bash/colors"
  54 }
  55
  56 # Sets the colours to be appropriate for a dark on light terminal
  57 function lightterm {
  58         DARK=0
  59         source "${HOME}/.bash/colors"
  60 }
  61
  62 # Usage: mcd somedir
  63 # Creates the directory if it doesn't exist, and changes into it
  64 function mcd {
  65         mkdir -p "${1}" &&
  66         cd "${1}"
  67 }
  68
  69
  70 # Load local functions
  71 ssource "${HOME}/.bash/functions_local"
  72