major rework

lib/install_deps.sh

@@ -0,0 +1,132 @@
+#!/usr/bin/env bash
+
+determine_pkg_mgr() {
+	# sudo used externally
+	# shellcheck disable=SC2034
+	test "$(id -u)" -eq 0 && SUDO='' || SUDO=sudo
+
+	# pkg-mgr update-cmd install-cmd check-cmd
+	# shellcheck disable=SC2016
+	local PKG_MGR_MAP='
+brew:brew update:brew install:brew list --formula ${pkg}
+apt-get:${SUDO} apt-get update: ${SUDO} apt-get install -y:dpkg -l ${pkg}
+pacman:${SUDO} pacman -Syy:${SUDO} pacman -S --noconfirm --needed:pacman -Qi ${pkg}
+dnf:${SUDO} dnf check-update:${SUDO} dnf install -y:dnf list -q --installed ${pkg}
+'
+	local supported_pkg_mgr=()
+	unset pkg_mgr pkg_mgr_update pkg_install pkg_check
+	while read -r line; do
+		test "${line}" == '' && continue
+		IFS=':' read -r pkg_mgr pkg_mgr_update pkg_install pkg_check <<<"${line}"
+		supported_pkg_mgr+=("${pkg_mgr}")
+		if ! has_cmd "${pkg_mgr}"; then
+			pkg_mgr=''
+			continue
+		fi
+		# update/install may use SUDO
+		eval "pkg_mgr_update=\"${pkg_mgr_update}\""
+		eval "pkg_install=\"${pkg_install}\""
+		break
+	done <<<"${PKG_MGR_MAP}"
+
+	if [[ ${pkg_mgr} == '' ]]; then
+		echo_fail "system does not use a supported package manager" "${supported_pkg_mgr[@]}"
+		return 1
+	fi
+
+	return 0
+}
+
+check_for_req_pkgs() {
+	echo_info "checking for required packages"
+	local common_pkgs=(
+		autoconf automake cmake libtool
+		texinfo nasm yasm python3
+		meson doxygen jq ccache gawk
+	)
+	# shellcheck disable=SC2034
+	local brew_pkgs=(
+		"${common_pkgs[@]}" pkgconf
+		mkvtoolnix pipx wget
+	)
+	local common_linux_pkgs=(
+		"${common_pkgs[@]}" clang valgrind
+		curl bc lshw xxd pkgconf
+	)
+	# shellcheck disable=SC2034
+	local apt_get_pkgs=(
+		"${common_linux_pkgs[@]}" build-essential
+		git-core libass-dev libfreetype6-dev
+		libsdl2-dev libva-dev libvdpau-dev
+		libvorbis-dev libxcb1-dev pipx
+		libxcb-shm0-dev libxcb-xfixes0-dev
+		zlib1g-dev libssl-dev ninja-build
+		gobjc++ mawk libnuma-dev wget
+		mediainfo mkvtoolnix libgtest-dev
+	)
+	# shellcheck disable=SC2034
+	local pacman_pkgs=(
+		"${common_linux_pkgs[@]}" base-devel
+		python-pipx ninja wget
+	)
+	# shellcheck disable=SC2034
+	local dnf_pkgs=(
+		"${common_linux_pkgs[@]}" openssl-devel
+		pipx ninja-build wget2
+	)
+
+	local req_pkgs_env_name="${pkg_mgr/-/_}_pkgs"
+	declare -n req_pkgs="${req_pkgs_env_name}"
+	local missing_pkgs=()
+	for pkg in "${req_pkgs[@]}"; do
+		# pkg_check has ${pkg} unexpanded
+		eval "pkg_check=\"${pkg_check}\""
+		${pkg_check} "${pkg}" >/dev/null 2>&1 || missing_pkgs+=("${pkg}")
+	done
+
+	if [[ ${#missing_pkgs[@]} -gt 0 ]]; then
+		echo_warn "missing packages:" "${missing_pkgs[@]}"
+		# shellcheck disable=SC2086
+		${pkg_mgr_update}
+		# shellcheck disable=SC2086
+		${pkg_install} "${missing_pkgs[@]}" || return 1
+	fi
+
+	echo_pass "packages from ${pkg_mgr} installed"
+	echo_if_fail pipx install virtualenv || return 1
+	echo_if_fail pipx ensurepath || return 1
+	echo_pass "pipx is installed"
+
+	# shellcheck disable=SC1091
+	test -f "${HOME}/.cargo/env" && source "${HOME}/.cargo/env"
+
+	if missing_cmd cargo; then
+		if missing_cmd rustup; then
+			echo_warn "installing rustup"
+			curl https://sh.rustup.rs -sSf | sh -s -- -y
+			# shellcheck disable=SC2016
+			grep -q 'source "${HOME}/.cargo/env"' "${HOME}/.bashrc" ||
+				echo 'source "${HOME}/.cargo/env"' >>"${HOME}/.bashrc"
+			# shellcheck disable=SC1091
+			source "${HOME}/.bashrc"
+		fi
+	fi
+
+	echo_if_fail rustup default stable || return 1
+	echo_if_fail rustup update stable || return 1
+	echo_pass "rustup is installed"
+	echo_if_fail cargo install cargo-c || return 1
+	echo_pass "cargo-c is installed"
+	echo_pass "all required packages installed"
+
+	return 0
+}
+
+FB_FUNC_NAMES+=('install_deps')
+# FB_FUNC_DESCS used externally
+# shellcheck disable=SC2034
+FB_FUNC_DESCS['install_deps']='install required dependencies'
+install_deps() {
+	determine_pkg_mgr || return 1
+	check_for_req_pkgs || return 1
+}