Contribution by Hugh Sasse. Alpha state.

install.rb

@@ -1,27 +1,73 @@
 #!/usr/local/bin/ruby -w
-
-# This program will take the files
-#   compiler/ruby.vim
-#   ftplugin/ruby.vim
-#   indent/ruby.vim
-#   syntax/ruby.vim
-# and install them in a place where Vim can see them.  If the environment
-# variable $VIM exists, it is assumed to point to, e.g. /usr/share/vim/vim62, so
-# the files can be placed in $VIM/syntax, etc.  But it is unlikely that $VIM is
-# defined, so this program will guess a few locations, using Unix and Windows
-# sensibilities.  It will, in fact, default to the user's ~/.vim or
-# $HOME/vimfiles.
 #
+# Script to install the vim files in a useful directory.
+#
+# Revision: $Id$
+# Status: alpha
+#
+# This was contributed by Hugh Sasse and is *UNTESTED*.  Usual disclaimers apply.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+# Known issues (summarised by Hugh):
+#   Only checks the places I could think of at the time.
+#   Doesn't bother to preserve the old files in any way.
+#   Doesn't ask the user if none of the directoriss apply, but that
+#       would make it interactive.
+#   Should it say "Job Done" or something? Silent success is a unix
+#       idiom, but not so on Win*.
+#   Doesn't check the files are in the correct format: no ^Ms for
+#       unix...
+#   Hasn't a clue what to do about Data Forks and .... thingy forks
+#       on the mac.:-) Is there Ruby for pre OS-X Macs?
+#
+# Gavin's notes:
+#   Doesn't include any Windows paths.  Should detect OS.
+#   TODO: revision 1.1 described some handy CLI-options which could
+#       be worked into here (e.g. global vs user directory).
+#   TODO: improve banner at the top with some of the nice doco from
+#       revision 1.1
+#
+
+require "ftools"
+
+PREFIXSTUB=["/usr/local/share/vim",
+        "/usr/local/vim",
+        "/usr/share/vim",
+        "/usr/vim",
+        "/opt/share/vim",
+        "/opt/vim"]
+
+stub = PREFIXSTUB.detect { |x| File.exist?(x) and File.directory?(x) }
+
+prefix = Dir.glob("#{stub}/vim*").sort[-1]
 
-USAGE = <<-EOF
-Usage: ruby install.rb [options]
+f = "ruby.vim"
 
- Options:
-   -g      install in global vim configuration directory
-   -u      install in user's (i.e. your) vim configuration directory (default)
-   -d DIR  install in DIR
-   -i      confirm before doing anything, especially overwriting files
-   -f      no confirmations
-EOF
+pairs = [
+    ["./compiler/#{f}", "#{prefix}/compiler/#{f}"],
+    ["./ftplugin/#{f}", "#{prefix}/ftplugin/#{f}"],
+    ["./indent/#{f}", "#{prefix}/indent/#{f}"],
+    ["./syntax/#{f}", "#{prefix}/syntax/#{f}"],
+]
 
-raise "Not implemented"
+pairs.each do |from, to|
+    unless File.compare(from, to)
+        # If it is the same don't bother copying.
+        if File.exist?(to) and File.mtime(to) > File.mtime(from)
+            # If the file to replace is newer, it could be someone's interim
+            # patch, We assume they want to keep it, unless this is
+            # called with -f. Warn about not doing so otherwise.
+            if ARGV.include?("-f")
+                File.install(from, to)
+            else
+                $stderr.puts "#{to} is newer than #{from}. `#{$0} -f` to force replacement"
+            end
+        else
+            File.install(from, to)
+        end
+    end
+end