Add script and route to login to Heroku

lib/generators/web_git/install_generator.rb

@@ -2,24 +2,46 @@ module WebGit
   class InstallGenerator < Rails::Generators::Base
     def generate_server
 
+      filename = Rails.root.join("config.ru")
+
       log :insert, "Updating config.ru to run apps in parallel."
-
-      contents = <<-RUBY.gsub(/^      /, "")
+      if File.exists?(filename) && already_installed?
+        log :identical, "Skipping overrides."
+      else
+        contents = <<~RUBY
 
-      if Rails.env.development?
-        map '/git' do
-          run WebGit::Server
+        if Rails.env.development?
+          map '/git' do
+            run WebGit::Server
+          end
         end
+
+        map '/' do
+        RUBY
+
+        filename = "config.ru"
+        match_text = "run Rails.application"
+
+        insert_into_file filename, contents, before: match_text
+        insert_into_file filename, "\nend", after: match_text, force: true
+        gsub_file filename, match_text, "\t#{match_text}"
       end
 
-      map '/' do\n\t
-      RUBY
+      expect_installed = run("which expect")
+
+      unless expect_installed
+        log :insert, "Installing expect."
+        run "sudo apt install -y expect"
+      else
+        log :identical, "expect already installed."
+      end
+    end
 
-      filename = "config.ru"
-      match_text = "run Rails.application"
+    def already_installed?
+      filename = Rails.root.join("config.ru")
+      contents = open(filename).read
 
-      insert_into_file filename, contents, before: match_text
-      insert_into_file filename, "\nend", after: match_text, force: true
+      contents.match?(/if\s*Rails.env.development\?\s*map\s*'\/git'\s*do\s*run\s*WebGit::Server\s*end\s*end/)
     end
   end
 end

lib/scripts/heroku_login.exp

@@ -0,0 +1,58 @@
+#!/usr/bin/expect -f
+#
+# This Expect script was generated by autoexpect on Tue Jun 22 17:49:07 2021
+# Expect and autoexpect were both written by Don Libes, NIST.
+#
+# Note that autoexpect does not guarantee a working script.  It
+# necessarily has to guess about certain things.  Two reasons a script
+# might fail are:
+#
+# 1) timing - A surprising number of programs (rn, ksh, zsh, telnet,
+# etc.) and devices discard or ignore keystrokes that arrive "too
+# quickly" after prompts.  If you find your new script hanging up at
+# one spot, try adding a short sleep just before the previous send.
+# Setting "force_conservative" to 1 (see below) makes Expect do this
+# automatically - pausing briefly before sending each character.  This
+# pacifies every program I know of.  The -c flag makes the script do
+# this in the first place.  The -C flag allows you to define a
+# character to toggle this mode off and on.
+
+set force_conservative 0  ;# set to 1 to force conservative mode even if
+			  ;# script wasn't run conservatively originally
+if {$force_conservative} {
+	set send_slow {1 .1}
+	proc send {ignore arg} {
+		sleep .1
+		exp_send -s -- $arg
+	}
+}
+
+#
+# 2) differing output - Some programs produce different output each time
+# they run.  The "date" command is an obvious example.  Another is
+# ftp, if it produces throughput statistics at the end of a file
+# transfer.  If this causes a problem, delete these patterns or replace
+# them with wildcards.  An alternative is to use the -p flag (for
+# "prompt") which makes Expect only look for the last line of output
+# (i.e., the prompt).  The -P flag allows you to define a character to
+# toggle this mode off and on.
+#
+# Read the man page for more info.
+#
+# -Don
+
+set email [lindex $argv 0];
+set password [lindex $argv 1];
+
+set timeout -1
+spawn heroku login --interactive
+match_max 100000
+expect -re {(.|\n)*Enter your login credentials\r}
+send -- "$email"
+expect -exact "$email"
+send -- "\r"
+expect -re {(.|\n)*Password:}
+send -- "$password"
+expect -re {\*.*}
+send -- "\r"
+expect eof