octave: PKG_ADD and PKG_DEL Directives

 
 37.4.3 PKG_ADD and PKG_DEL Directives
 -------------------------------------
 
 If the package contains files called ‘PKG_ADD’ or ‘PKG_DEL’ the commands
 in these files will be executed when the package is added or removed
 from the users path.  In some situations such files are a bit cumbersome
 to maintain, so the package manager supports automatic creation of such
 files.  If a source file in the package contains a ‘PKG_ADD’ or
 ‘PKG_DEL’ directive they will be added to either the ‘PKG_ADD’ or
 ‘PKG_DEL’ files.
 
    In ‘m’-files a ‘PKG_ADD’ directive looks like this
 
      ## PKG_ADD: some_octave_command
 
 Such lines should be added before the ‘function’ keyword.  In C++ files
 a ‘PKG_ADD’ directive looks like this
 
      // PKG_ADD: some_octave_command
 
 In both cases ‘some_octave_command’ should be replaced by the command
 that should be placed in the ‘PKG_ADD’ file. ‘PKG_DEL’ directives work
 in the same way, except the ‘PKG_ADD’ keyword is replaced with ‘PKG_DEL’
 and the commands get added to the ‘PKG_DEL’ file.