Re: obsolete modules

[Bruno Haible]

Jim Meyering wrote:
> Go ahead and declare these modules "obsolescent", but
> rather than ripping out all dependencies on them,
> add an option to gnulib-tool (say, --ignore-obsolescent)
> to tell it to do ignore any dependency on an obsolescent module.

Good idea. For this, it's necessary to formalize the notion of obsolescence
of a module. A new attribute in the module description does it:


2008-11-02  Bruno Haible  <address@hidden>

        * modules/TEMPLATE-EXTENDED: New field 'Status'.
        * gnulib-tool: New option --extract-status.
        (func_usage): Document it.
        (sed_extract_prog): Recognize it.
        (func_get_status): New function.

*** modules/TEMPLATE-EXTENDED.orig      2008-11-02 15:36:50.000000000 +0100
--- modules/TEMPLATE-EXTENDED   2008-11-02 15:25:34.000000000 +0100
***************
*** 1,5 ****
--- 1,7 ----
  Description:
  
+ Status:
+ 
  Notice:
  
  Files:
*** gnulib-tool.orig    2008-11-02 15:36:49.000000000 +0100
--- gnulib-tool 2008-11-02 15:28:33.000000000 +0100
***************
*** 100,105 ****
--- 100,106 ----
         gnulib-tool --test --dir=directory module1 ... moduleN
         gnulib-tool --megatest --dir=directory [module1 ... moduleN]
         gnulib-tool --extract-description module
+        gnulib-tool --extract-status module
         gnulib-tool --extract-notice module
         gnulib-tool --extract-filelist module
         gnulib-tool --extract-dependencies module
***************
*** 126,131 ****
--- 127,133 ----
        --megatest            test the given modules one by one and all together
                              (recommended to use CC=\"gcc -Wall\" here)
        --extract-description        extract the description
+       --extract-status             extract the status (obsolete or not)
        --extract-notice             extract the notice or banner
        --extract-filelist           extract the list of files
        --extract-dependencies       extract the dependencies
***************
*** 1256,1261 ****
--- 1258,1264 ----
    :a
      n
      s/^Description:[   ]*$//
+     s/^Status:[        ]*$//
      s/^Notice:[        ]*$//
      s/^Files:[         ]*$//
      s/^Depends-on:[    ]*$//
***************
*** 1281,1286 ****
--- 1284,1298 ----
    sed -n -e "/^Description$sed_extract_prog" < "$lookedup_file"
  }
  
+ # func_get_status module
+ # Input:
+ # - local_gnulib_dir  from --local-dir
+ func_get_status ()
+ {
+   func_lookup_file "modules/$1"
+   sed -n -e "/^Status$sed_extract_prog" < "$lookedup_file"
+ }
+ 
  # func_get_notice module
  # Input:
  # - local_gnulib_dir  from --local-dir
***************
*** 4356,4361 ****
--- 4368,4383 ----
      done
      ;;
  
+   extract-status )
+     for module
+     do
+       func_verify_module
+       if test -n "$module"; then
+         func_get_status "$module"
+       fi
+     done
+     ;;
+ 
    extract-notice )
      for module
      do