diff options
| -rw-r--r-- | Functions/Misc/relative | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Functions/Misc/relative b/Functions/Misc/relative new file mode 100644 index 000000000..f649e51e7 --- /dev/null +++ b/Functions/Misc/relative @@ -0,0 +1,28 @@ +# Print the a relative path from the second directory to the first, +# defaulting the second directory to $PWD if none is specified. +emulate -L zsh || return 1 + +[[ $1 != /* ]] && print $1 && return +[[ -f $1 ]] && 3=$1:t 1=$1:h +[[ -d $1 && -d ${2:=$PWD} ]] || return 1 +[[ $1 -ef $2 ]] && print ${3:-.} && return + +# The simplest way to eliminate symlinks and ./ and ../ in the paths: +1=$(cd $1; pwd -r) +2=$(cd $2; pwd -r) + +local -a cur abs +cur=(${(s:/:)2}) # Split 'current' directory into cur +abs=(${(s:/:)1} $3) # Split target directory into abs + +# Compute the length of the common prefix, or discover a subdiretory: +integer i=1 +while [[ i -le $#abs && $abs[i] == $cur[i] ]] +do + ((++i > $#cur)) && print ${(j:/:)abs[i,-1]} && return +done + +2=${(j:/:)cur[i,-1]/*/..} # Up to the common prefix directory and +1=${(j:/:)abs[i,-1]} # down to the target directory or file + +print $2${1:+/$1} |