Neovide Install Script

#!/usr/bin/env bash
#
# Linux: download release asset and if that doesn't work build with cargo
# Mac: install with Homebrew if available, download dmg, or build with cargo
# SC2001,SC2016,SC2006,SC2086,SC2181,SC2129,SC2059,SC2164
# shellcheck disable=SC2181
export PATH="$HOME/.local/bin:$PATH:$HOME/.cargo/bin"
have_brew=$(type -p brew)
have_cargo=$(type -p cargo)
have_wget=$(type -p wget)
have_curl=$(type -p curl)
have_jq=$(type -p jq)
have_unzip=$(type -p unzip)
platform=$(uname -s)
cargo_install() {
 [ "${have_cargo}" ] || {
 printf "\nNeovide build requires cargo but cargo not found.\n"
 while true; do
 read -r -p "Do you wish to install cargo now ? (y/n) " yn
 case $yn in
 [Yy]*)
 printf "\nInstalling cargo ..."
 if [ "${have_brew}" ]
 then
 brew install rust >/dev/null 2>&1
 else
 RUST_URL="https://sh.rustup.rs"
 curl -fsSL "${RUST_URL}" >/tmp/rust-$$.sh
 [ $? -eq 0 ] || {
 rm -f /tmp/rust-$$.sh
 curl -kfsSL "${RUST_URL}" >/tmp/rust-$$.sh
 [ -f /tmp/rust-$$.sh ] && {
 cat /tmp/rust-$$.sh | sed -e "s/--show-error/--insecure --show-error/" >/tmp/ins$$
 cp /tmp/ins$$ /tmp/rust-$$.sh
 rm -f /tmp/ins$$
 }
 }
 [ -f /tmp/rust-$$.sh ] && sh /tmp/rust-$$.sh -y >/dev/null 2>&1
 rm -f /tmp/rust-$$.sh
 fi
 printf " done"
 break
 ;;
 [Nn]*)
 printf "\nAborting cargo and neovide install\n"
 exit 1
 ;;
 *)
 printf "\nPlease answer yes or no.\n"
 ;;
 esac
 done
 have_cargo=$(type -p cargo)
 }
 if [ "${have_cargo}" ]
 then
 printf "\nBuilding Neovide GUI, please be patient ... "
 cargo install --git https://github.com/neovide/neovide >/dev/null 2>&1
 printf "done\n"
 have_neovide=$(type -p neovide)
 else
 printf "\nCannot locate cargo. Perhaps it is not in your PATH."
 printf "\nUnable to build Neovide"
 fi
}
dl_asset() {
 DLFMT="1ドル"
 if [ "${DLFMT}" == "tgz" ]
 then
 name="neovide"
 format="tar"
 suffix="gz"
 else
 if [ "${DLFMT}" == "dmg" ]
 then
 name="Neovide"
 format="dmg"
 suffix="zip"
 else
 printf "\nUnsupported asset type"
 name=
 fi
 fi
 [ "${name}" ] || return
 OWNER=neovide
 PROJECT=neovide
 API_URL="https://api.github.com/repos/${OWNER}/${PROJECT}/releases/latest"
 DL_URL=
 [ "${have_curl}" ] && [ "${have_jq}" ] && {
 DL_URL=$(curl --silent "${API_URL}" \
 | jq --raw-output '.assets | .[]?.browser_download_url' \
 | grep "${name}\.${format}\.${suffix}$")
 }
 [ "${DL_URL}" ] && {
 [ "${have_wget}" ] && {
 printf "\nDownloading neovide release asset ..."
 if [ "${DLFMT}" == "tgz" ]
 then
 TEMP_ASS="$(mktemp --suffix=.tgz)"
 else
 TEMP_ASS="$(mktemp --suffix=.zip)"
 fi
 wget --quiet -O "${TEMP_ASS}" "${DL_URL}" >/dev/null 2>&1
 chmod 644 "${TEMP_ASS}"
 mkdir -p /tmp/neov$$
 if [ "${DLFMT}" == "tgz" ]
 then
 tar -C /tmp/neov$$ -xzf "${TEMP_ASS}"
 else
 [ "${have_unzip}" ] && {
 unzip -d /tmp/neov$$ "${TEMP_ASS}"
 }
 fi
 [ -f /tmp/neov$$/neovide ] && {
 chmod 755 /tmp/neov$$/neovide
 /tmp/neov$$/neovide --version > /dev/null 2>&1 && {
 rm -f /tmp/neovide$$
 mv /tmp/neov$$/neovide /tmp/neovide$$
 }
 }
 [ -f /tmp/neov$$/neovide.dmg ] && {
 chmod 644 /tmp/neov$$/neovide.dmg
 rm -f /tmp/neovide$$.dmg
 mv /tmp/neov$$/neovide.dmg /tmp/neovide$$.dmg
 }
 rm -f "${TEMP_ASS}"
 rm -rf /tmp/neov$$
 printf " done"
 }
 }
}
have_neovide=$(command -v neovide)
[ "${have_neovide}" ] && {
 printf "\nNeovide already installed as %s" "${have_neovide}"
 printf "\nRemove neovide and rerun this script to reinstall Neovide"
 printf "\nExiting without installing\n"
 exit 0
}
[ -d "$HOME"/.local ] || mkdir -p "$HOME"/.local
[ -d "$HOME"/.local/bin ] || mkdir -p "$HOME"/.local/bin
if [ "${platform}" == "Darwin" ]
then
 if [ "${have_brew}" ]
 then
 brew install neovide >/dev/null 2>&1
 else
 dl_asset dmg
 if [ -f /tmp/neovide$$.dmg ]
 then
 have_mount=$(type -p hdiutil)
 [ "${have_mount}" ] && {
 [ -d "$HOME"/Applications ] || mkdir -p "$HOME"/Applications
 hdiutil mount /tmp/neovide$$.dmg
 [ -d /Volumes/neovide/neovide.app ] && {
 [ -d "$HOME"/Applications/neovide.app ] && {
 rm -rf "$HOME"/Applications/neovide.app
 }
 cp -a /Volumes/neovide/neovide.app "$HOME"/Applications
 hdiutil unmount "/Volumes/neovide"
 [ -f "$HOME"/.local/bin/neovide ] && {
 rm -f "$HOME"/.local/bin/neovide
 }
 [ -f "$HOME"/Applications/neovide.app/Contents/MacOS/neovide ] && {
 ln -s "$HOME"/Applications/neovide.app/Contents/MacOS/neovide \
 ~/.local/bin/neovide
 }
 }
 }
 rm -f /tmp/neovide$$.dmg
 else
 cargo_install
 fi
 fi
else
 dl_asset tgz
 if [ -x /tmp/neovide$$ ]
 then
 mv /tmp/neovide$$ "$HOME"/.local/bin/neovide
 else
 cargo_install
 fi
fi