title: TCL: Recursively search subdirectories to source all .tcl files
body: <p>I have a main TCL proc that sources tons of other tcl procs in other folders and subsequent subdirectories.  For example, in the main proc it has:</p>
  
  <pre><code>source $basepath/folderA/1A.tcl
  source $basepath/folderA/2A.tcl
  source $basepath/folderA/3A.tcl
  source $basepath/folderB/1B.tcl
  source $basepath/folderB/2B.tcl
  source $basepath/folderB/3B.tcl
  </code></pre>
  
  <p>and it seems kind of stupid to do it that way when I always know I will source everything in folderA and folderB.  Is there a function (or simple way) that'll allow me to just source all the .tcl files in an entire folder?</p>