Add support for different OS package managers; simplify some logic

installs_and_builds/fzf

@@ -1,2 +1,2 @@
 #!/bin/zsh
-brew install fzf
+${=BOX_SETUP_INSTALL_COMMAND} fzf

installs_and_builds/git

@@ -1,2 +1,2 @@
 #!/bin/zsh
-brew install git
+${=BOX_SETUP_INSTALL_COMMAND} git

installs_and_builds/libs

@@ -3,4 +3,4 @@
 local lua_package="lua5.1"
 [[ "$BOX_SETUP_OS" = "macos" ]] && lua_package="lua@5.1"
 
-$BOX_SETUP_INSTALL_COMMAND cmake gettext "$lua_package" liblua5.1-0-dev
+${=BOX_SETUP_INSTALL_COMMAND} cmake gettext "$lua_package" liblua5.1-0-dev

installs_and_builds/neovim

@@ -1,3 +1,3 @@
 #!/bin/zsh
 
-brew install neovim
+${=BOX_SETUP_INSTALL_COMMAND} neovim

installs_and_builds/neovim_from_source

@@ -9,7 +9,6 @@
 # git -C $neovim_dir fetch --all
 # git -C $neovim_dir checkout $neovim_version
 # 
-# 
 # make -C $neovim_dir clean
 # make -C $neovim_dir CMAKE_BUILD_TYPE=RelWithDebInfo
 # sudo make -C $neovim_dir install

installs_and_builds/tmux

@@ -1,2 +1,2 @@
 #!/bin/zsh
-brew install tmux
+${=BOX_SETUP_INSTALL_COMMAND} tmux

installs_and_builds/utils

@@ -2,4 +2,4 @@
 
 # likely on unix systems already: find xargs grep sed awk
 
-brew install jq parallel
+${=BOX_SETUP_INSTALL_COMMAND} jq parallel