trackconf

#!/usr/bin/env sh

# Easily manage a dotfiles repository with symlinks.

ScriptName=${0##*/}
Version=1.0.0
Deps='ranger rsync'

EnvDotfilesVar=$(printf '%s_DOTFILES' "$ScriptName" | tr '[a-z]' '[A-Z]')
EnvDotfilesValue=$(eval printf '%s' \"\$$EnvDotfilesVar\")
Dotfiles=$EnvDotfilesValue

EnvSelectedFilesVar=$(printf '%s_TEMP' "$ScriptName" | tr '[a-z]' '[A-Z]')
EnvSelectedFilesValue=$(eval printf '%s' \"\$$EnvSelectedFilesVar\")
SelectedFiles=${EnvSelectedFilesValue:-/tmp/$ScriptName}

[ "$EnvDotfilesValue" ] && DotfilesStatus="Currently \033[1;34m$EnvDotfilesVar\033[0m=$Dotfiles" || \
    DotfilesStatus="Currently \033[1;34m$EnvDotfilesVar\033[0m is not set."

[ "$EnvSelectedFilesValue" ] && SelectedFilesStatus="Currently \033[1;34m$EnvSelectedFilesVar\033[0m=$SelectedFiles" || \
    SelectedFilesStatus="Currently \033[1;34m$EnvSelectedFilesVar\033[0m is not set."

HelpMessage="\033[32m$ScriptName\033[0m $Version
Alexander Chaplin Braz <contact@alexchaplinbraz.com>

Easily manage a dotfiles repository with symlinks.

Must set dotfiles directory with \033[1;34m$EnvDotfilesVar\033[0m.
$DotfilesStatus

Can set temp file with \033[1;34m$EnvSelectedFilesVar\033[0m, but if not set
it defaults to: /tmp/$ScriptName
$SelectedFilesStatus

\033[33mUSAGE:\033[0m
    $ScriptName <COMMAND>
    $ScriptName [FLAG]

\033[33mFLAGS:\033[0m
    \033[32m-h\033[0m, \033[32m--help\033[0m       Print help and exit.
    \033[32m-v\033[0m, \033[32m--version\033[0m    Print version and exit.

\033[33mCOMMANDS:\033[0m
    \033[32madd\033[0m        Opens 'ranger' in the current directory and lets you select files
               that will be copied to the dotfiles repo, preserving the
               directory structure. This is useful for backing up configs of
               programs you're uninstalling.
    \033[32mdeploy\033[0m     Opens 'ranger' in the directory of the dotfiles and links the
               selected files to where they belong, creating any missing
               directories. This assumes all selected files are from inside the
               dotfiles repository, so it shouldn't be used for external files.
               Deploying directories is somewhat supported if the directory
               doesn't already exist. But this should be avoided unless every
               single file inside that directory is going to be tracked. And
               it's also a bit clunky since you need to Enter on a file to
               finalise selection.
    \033[32mhelp\033[0m       Print help and exit.
    \033[32mlink\033[0m       Same as 'add' but with the newly added files symlinked back into
               the place they belonged making it effortless to track configs.
    \033[32mversion\033[0m    Print version and exit.

\033[33mDEPENDENCIES:\033[0m
    $Deps
"

error() {
    printf "\033[1;31m${2:-ERROR}\033[0m: %s.\nTry '%s --help' for more information.\n" \
        "$1" "$ScriptName" 1>&2
    exit 1
}

case $1 in
    -h|--help|h|he|hel|help|'') printf '%b' "$HelpMessage"; exit 0 ;;
    -v|--version|v|ve|ver|vers|versi|versio|version) printf '%s\n' "$Version"; exit 0 ;;
    d|de|dep|depl|deplo|deploy) Deploy=true ;;
    a|ad|add) Add=true ;;
    l|li|lin|link) Link=true ;;
    *) error "unknown argument '$1'" ;;
esac

for dep in $Deps; do ! command -v $dep 1>/dev/null && MissingDeps="$MissingDeps $dep"; done
[ "$MissingDeps" ] && error "missing dependencies:$MissingDeps"

[ -z "$Dotfiles" ] && error "must have '$EnvDotfilesVar' set to dotfiles directory"
[ ! -d "$Dotfiles" ] && error "'$Dotfiles' is not a valid directory"

if [ $Deploy ]; then
    ranger --choosefiles="$SelectedFiles" --cmd='set show_hidden true' $Dotfiles
    [ -e "$SelectedFiles" ] || exit 0

    IFS=${IFS#??}
    for line in $(cat "$SelectedFiles"); do
        FilePath=$(printf '%s' $line | sed "s|${Dotfiles}/||")
        mkdir -p ${line%/*}
        ln -vsfnT "$line" ~/"$FilePath"
    done
elif [ $Add ]; then
    ranger --choosefiles="$SelectedFiles" --cmd='set show_hidden true'
    [ -e "$SelectedFiles" ] || exit 0

    Files=$(sed "s|/|/./|3;s|^|'|;s|$|'|" "$SelectedFiles" | tr '\n' ' ')
    eval rsync -avR --no-links "$Files" "$Dotfiles"
elif [ $Link ]; then
    ranger --choosefiles="$SelectedFiles" --cmd='set show_hidden true'
    [ -e "$SelectedFiles" ] || exit 0

    Files=$(sed "s|/|/./|3;s|^|'|;s|$|'|" "$SelectedFiles" | tr '\n' ' ')
    eval rsync -avR --no-links "$Files" "$Dotfiles"

    IFS=${IFS#??}
    for line in $(cat "$SelectedFiles"); do
        FilePath=$(printf '%s' $line | sed "s|${HOME}/||")
        ln -vsfnT "$Dotfiles"/"$FilePath" ~/"$FilePath"
    done
fi

rm "$SelectedFiles" 2>/dev/null