dotfiles/install.sh

#!/usr/bin/env bash

#   Copyright 2014 Steve Francia
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

############################  SETUP PARAMETERS

app_name='dotfiles'
[ -z "$APP_PATH" ] && APP_PATH="$HOME/.$app_name"
[ -z "$REPO_URI" ] && REPO_URI="https://github.com/Donaldttt/$app_name"
[ -z "$REPO_BRANCH" ] && REPO_BRANCH='main'
[ -z "$VUNDLE_URI" ] && VUNDLE_URI="https://github.com/gmarik/vundle.git"

############################  BASIC SETUP TOOLS
msg() {
    printf '%b\n' "$1" >&2
}

success() {
    if [ "$ret" -eq '0' ]; then
        msg "\33[32m[✔]\33[0m ${1}${2}"
    fi
}

error() {
    msg "\33[31m[✘]\33[0m ${1}${2}"
    exit 1
}

program_exists() {
    local ret='0'
    command -v $1 >/dev/null 2>&1 || { local ret='1'; }

    # fail on non-zero return value
    if [ "$ret" -ne 0 ]; then
        return 1
    fi

    return 0
}

program_must_exist() {
    program_exists $1

    # throw error on non-zero return value
    if [ "$?" -ne 0 ]; then
        error "You must have '$1' installed to continue."
    fi
}

variable_set() {
    if [ -z "$1" ]; then
        error "You must have your HOME environmental variable set to continue."
    fi
}

lnif() {
    if [ -e "$1" ]; then
        ln -sf "$1" "$2"
    fi
    ret="$?"
}

############################ SETUP FUNCTIONS

do_backup() {
    if [ -e "$1" ] || [ -e "$2" ] || [ -e "$3" ]; then
        msg "Attempting to back up your original vim configuration."
        today=`date +%Y%m%d_%s`
        for i in "$1" "$2" "$3"; do
            [ -e "$i" ] && [ ! -L "$i" ] && mv -v "$i" "$i.$today";
        done
        ret="$?"
        success "Your original vim configuration has been backed up."
   fi
}

sync_repo() {
    local repo_path="$1"
    local repo_uri="$2"
    local repo_branch="$3"
    local repo_name="$4"

    msg "Trying to update $repo_name"

    if [ ! -e "$repo_path" ]; then
        mkdir -p "$repo_path"
        git clone -b "$repo_branch" "$repo_uri" "$repo_path"
        ret="$?"
        success "Successfully cloned $repo_name."
    else
        cd "$repo_path" && git pull origin "$repo_branch"
        ret="$?"
        success "Successfully updated $repo_name"
    fi
}

create_symlinks() {
    local source_path="$1"
    local target_path="$2"

    lnif "$source_path/.vimrc"         "$target_path/.vimrc"
    lnif "$source_path/.vimrc.bundles" "$target_path/.vimrc.bundles"
    lnif "$source_path/.vim"           "$target_path/.vim"


    ret="$?"
    success "Setting up vim symlinks."
}

setup_vundle() {
    local system_shell="$SHELL"
    export SHELL='/bin/sh'

    vim \
        -u "$1" \
        "+set nomore" \
        "+BundleInstall!" \
        "+BundleClean" \
        "+qall"
    export SHELL="$system_shell"
    success "Now updating/installing plugins using Vundle"
}

set_up_nvim() {
  nvim_dir="$HOME/.config/nvim"
  nvim_config="$nvim_dir/init.vim"
  mkdir -p $nvim_dir
  if program_exists "nvim"; then
    msg "Found neovim."
    if [ -f "$nvim_config" ]; then
      msg "Found init.vim. backing up it"
      mv $nvim_config "${nvim_config}.backup"
    fi
    echo "set runtimepath^=~/.vim runtimepath+=~/.vim/after
let &packpath=&runtimepath
source ~/.vimrc" > $nvim_config
  fi
}

############################ MAIN()
variable_set "$HOME"
program_must_exist "vim"
program_must_exist "git"

sync_repo       "$APP_PATH" \
                "$REPO_URI" \
                "$REPO_BRANCH" \
                "$app_name"

create_symlinks "$APP_PATH" \
                "$HOME"

sync_repo       "$HOME/.vim/bundle/vundle" \
                "$VUNDLE_URI" \
                "master" \
                "vundle"

set_up_nvim

msg             "\nThanks for installing $app_name."