Add my Mac and Linux build helpers.

This is to save new contributors some time getting a build env, since
download-and-compile produces a slightly Baroque setup for day-to-day
development.

compile-scripts/commands-linux.rb

@@ -0,0 +1,130 @@
+#!/usr/bin/ruby
+
+require 'fileutils'
+require 'optparse'
+include FileUtils
+
+baseDir = Dir.pwd
+gitArgs = ""
+qtPath = ""
+
+doPull = false
+doCMake = false
+doInit = false
+doClean = false
+doPackage = false
+
+cmakeCommonArgs = "-DCMAKE_INSTALL_PREFIX=#{baseDir}/dist -DSIMGEAR_SHARED=1"
+cmakeFGArgs = ""
+sfUser = "jmturner"
+
+OptionParser.new do |opts|
+  opts.banner = "Usage: commands.rb [options]"
+  opts.on("", "--init", "Setup empty") do |v|
+    doInit = v
+  end
+
+  opts.on("-p", "--[no-]pull", "Pull from Git") do |v|
+    doPull = v
+  end
+  opts.on("-c", "--cmake", "Run Cmake") do |v|
+    doCMake = v
+  end
+  opts.on("", "--clean", "Clean build dirs") do |v|
+    doClean = v
+  end
+  opts.on("-r", "--rebase", "Rebase when pulling") do |v|
+    gitArgs += "--rebase"
+  end
+
+  opts.on("", "--qt=QTPATH", "Set Qt path when running cmake") do |v|
+    qtPath = v
+  end
+end.parse!(ARGV)
+
+def cloneEverything()
+  puts "Initialising"
+  if File.exist?("#{Dir.pwd}/simgear") or File.exist?("#{Dir.pwd}/flightgear")
+    puts "Checkout already exists"
+    return
+  end
+
+  `git clone ssh://#{sfUser}@git.code.sf.net/p/flightgear/simgear simgear`
+  `git clone ssh://#{sfUser}@git.code.sf.net/p/flightgear/flightgear flightgear`
+  `git clone ssh://#{sfUser}@git.code.sf.net/p/flightgear/fgdata fgdata`
+  `git clone https://github.com/openscenegraph/osg.git osg`
+end
+
+def createDirs()
+  `mkdir -p sgbuild`
+  `mkdir -p fgbuild`
+  `mkdir -p osg_release_build`
+end
+
+# path is needed for Cmake & running macdeployqt
+if qtPath != ""
+  ENV['PATH'] = "#{ENV['PATH']}:#{qtPath}/bin"
+end
+
+if doClean
+  puts "Cleaning build dirs"
+  `rm -r sgbuild`
+  `rm -r fgbuild`
+  `rm -r osg_release_build`
+  createDirs()
+end
+
+if doInit
+  puts "Doing init"
+    cloneEverything()
+    createDirs();
+end
+
+if doPull
+  puts "Pulling from Git"
+  dataPull = Thread.new do
+    puts "Syncing FGData"
+    Dir.chdir "#{baseDir}/fgdata"
+    `git pull #{gitArgs}`
+  end
+
+  Dir.chdir "#{baseDir}/simgear"
+  `git pull #{gitArgs}`
+
+  Dir.chdir "#{baseDir}/flightgear"
+  `git pull #{gitArgs}`
+end
+
+Dir.chdir "#{baseDir}/osg_release_build"
+if doCMake or !File.exist?("#{Dir.pwd}/Makefile")
+  `cmake ../osg -DCMAKE_INSTALL_PREFIX=#{baseDir}/dist`
+end
+
+puts "Building OpenSceneGraph"
+`make`
+`make install`
+
+Dir.chdir "#{baseDir}/sgbuild"
+
+if doCMake or !File.exist?("#{Dir.pwd}/Makefile")
+  `cmake ../simgear #{cmakeCommonArgs}`
+end
+
+puts "Building SimGear"
+`make`
+`make install`
+
+Dir.chdir "#{baseDir}/fgbuild"
+
+if doCMake or !File.exist?("#{Dir.pwd}/Makefile")
+  if qtPath != ""
+    cmakeFGArgs = '-DENABLE_QT=1'
+  end
+  `cmake ../flightgear #{cmakeCommonArgs} #{cmakeFGArgs}`
+end
+
+puts "Building FlightGear"
+`make`
+`make install`
+
+puts "All done."