dotfiles/scripts/dotfiles.sh

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#!/usrenv bash
# Handles dotfiles
# Yes there are tons of similar scipts yet I wanted no more nor less than what I needed
# (sourceable)
# Config
if [ -z "$DOTHOME" ]; then
DOTHOME="$HOME"
fi
if [ -z "$DOTREPO" ]; then
DOTREPO="$HOME/.dotfiles"
fi
# Common functions
# From http://stackoverflow.com/a/12498485
function relativePath {
# both $1 and $2 are absolute paths beginning with /
# returns relative path to $2/$target from $1/$source
source=$1
target=$2
common_part=$source # for now
result="" # for now
while [[ "${target#$common_part}" == "${target}" ]]; do
# no match, means that candidate common part is not correct
# go up one level (reduce common part)
common_part="$(dirname $common_part)"
# and record that we went back, with correct / handling
if [[ -z $result ]]; then
result=".."
else
result="../$result"
fi
done
if [[ $common_part == "/" ]]; then
# special case for root (no common path)
result="$result/"
fi
# since we now have identified the common part,
# compute the non-common part
forward_part="${target#$common_part}"
# and now stick all parts together
if [[ -n $result ]] && [[ -n $forward_part ]]; then
result="$result$forward_part"
elif [[ -n $forward_part ]]; then
# extra slash removal
# result="${forward_part:1}" # Removes the . in the beginning...
result="${forward_part#/}"
fi
echo "$result"
}
# Script common functions
function _dotfiles-install-dir { # dir
local dir
local absSource
local absTarget
local relTarget
dir="${1%/}"
dir="${dir#/}"
ls -A "$DOTREPO/$dir" | while read file; do
if [[ -z "$dir" && $(echo $file | grep '^\(\.\|LICENSE\|README\)') ]]; then
continue
fi
if [[ $(echo $file | grep '^.dfrecur$') ]]; then
continue
fi
if [ -z "$dir" ]; then
absSource="$DOTHOME/.$file"
absTarget="$DOTREPO/$file"
else
absSource="$DOTHOME/.$dir/$file"
absTarget="$DOTREPO/$dir/$file"
fi
relTarget="$(relativePath "$DOTHOME/$dir" "$absTarget")"
recurIndicator="$absTarget/.dfrecur"
if [[ -h "$absTarget" ]]; then
if [ -e "$absSource" ]; then
if [ -h "$absSource" ]; then
cmd="cp --no-dereference --force $absTarget $absSource"
if [ $DRY_RUN ]; then
echo $cmd
else
yes | $cmd
fi
else
echo "[ERROR] $absSource already exists, but is not a link"
fi
else
cmd="cp --no-dereference --force $absTarget $absSource"
if [ $DRY_RUN ]; then
echo $cmd
else
yes | $cmd
fi
fi
elif [[ -f "$absTarget" || ( -d $absTarget && ! -f $recurIndicator ) ]]; then
if [ -e "$absSource" ]; then
if [ -h "$absSource" ]; then
cmd="ln --symbolic --no-dereference --force $relTarget $absSource"
if [ $DRY_RUN ]; then
echo $cmd
else
$cmd
fi
else
echo "[ERROR] $absSource already exists, but is not a symbolic link"
fi
else
cmd="ln --symbolic --no-dereference $relTarget $absSource"
if [ $DRY_RUN ]; then
echo $cmd
else
$cmd
fi
fi
elif [[ -d "$absTarget" && -f $recurIndicator ]]; then
if [ -e "$absSource" ]; then
if [ -d "$absSource" ]; then
# echo "Directory $absSource already exists"
_dotfiles-install-dir $dir/$file
else
echo "[ERROR] $absSource already exists, but is not a directory"
fi
else
cmd="mkdir $absSource"
if [ $DRY_RUN ]; then
echo $cmd
else
$cmd
fi
_dotfiles-install-dir $dir/$file
fi
else
echo "[WARNING] Skipped $absTarget"
fi
done
}
# Script functions
function dotfiles-link { # file
absSource="$(realpath $1 2> /dev/null)"
if [[ $? != 0 || ! -e "$absSource" ]]; then
echo "[ERROR] $1: no such file or directory"
return 1
fi
relSource="$(relativePath $DOTHOME $absSource)"
absTarget="$DOTREPO/$relSource"
relTarget="$(relativePath "$DOTHOME/$dir" "$absTarget")"
if [ -f "$absTarget" ]; then
echo "[ERROR/UNIMPLEMENTED] $relSource is already linked to ... something"
return 2
fi
if [ -f "$absSource" ]; then
if [ -d "$(dirname "$absTarget")" ]; then
cmd="mv $absSource $absTarget"
cmd2="ln --symbolic --no-dereference $relTarget $absSource"
if [ $DRY_RUN ]; then
echo $cmd
echo $cmd2
else
$cmd
$cmd2
fi
else
echo "[UNIMPLEMENTED] Linking a file in a directory that don't already exists"
fi
else
echo "[UNIMPLEMENTED] Linking things other than a file"
return 12
fi
}
function dotfiles-install {
_dotfiles-install-dir /
}
# TODO dotfiles-{link,unlink,clean,uninstall}, better handling of DRY_RUN (use functions probably), clarify source/target thingy
# Link and Unlink should have a clever behavior regarding
# recusive folders
# Ex : linking config/i3 should make config recursible
# Ex : linking config if some files in it are linked should unlink those