Restructuring the repo

install.zsh

@@ -0,0 +1,49 @@
+#!/bin/zsh
+
+source ${$(realpath "$0"):h}/lib/common.zsh
+
+typeset -A interpreter_checked
+have_interpreter() {
+	if [[ ! $interpreter_checked[$1] ]]; then
+		check "Checking for $1… "
+		if which ruby &> /dev/null; then
+			succeed
+			interpreter_checked[$1]=1
+			return 0
+		else
+			fail "not found in path"
+			return 1
+		fi
+	fi
+
+}
+
+uses_interpreter() {
+	head -n 1 $2 | grep -q $1
+}
+
+if [[ -z $1 ]]; then
+	<<-HELP
+	Usage: $0 [-p PATH] <program_names>
+	HELP
+	exit 1
+fi
+
+zparseopts -D -E p:=install_path -path:=install_path f=force -force=force
+
+if [[ ! $install_path ]]; then
+	install_path=$HOME/.local/bin
+fi
+
+for prog in $@; do
+	for lang in zsh ruby python; do
+		if uses_interpreter $lang $prog; then
+			have_interpreter $lang || exit 1
+		fi
+	done
+	if [[ -e $install_path/${prog:t} && ! $force ]]; then
+		error "$prog already exists at $install_path. Skipping."
+	else
+		ln -fsr $prog $install_path
+	fi
+done