diff options
| -rw-r--r-- | powerlevel9k.zsh-theme | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/powerlevel9k.zsh-theme b/powerlevel9k.zsh-theme index 56ecb611..ec8a859a 100644 --- a/powerlevel9k.zsh-theme +++ b/powerlevel9k.zsh-theme @@ -48,6 +48,14 @@ # Utility functions ################################################################ +# Exits with 0 if a variable has been previously defined (even if empty) +# Takes the name of a variable that should be checked. +function defined() { + local varname="$1" + + typeset -p "$varname" > /dev/null 2>&1 +} + function print_icon() { local icon_name=$1 local ICON_USER_VARIABLE=POWERLEVEL9K_${icon_name} @@ -59,6 +67,18 @@ function print_icon() { fi } +# Given the name of a variable and a default value, sets the variable +# value to the default only if it has not been defined. +# +# typeset cannot set the value for an array, so this will only work +# for scalar values. +function set_default() { + local varname="$1" + local default_value="$2" + + defined "$varname" || typeset -g "$varname"="$default_value" +} + ################################################################ # Icons ################################################################ |