[Tack-devel] Linux install problems.

[r. c. <rvc...@ac...>]

I'm trying to install the cvs ack on debian testing (updated weekly)
and ran into a few problems:

 - first/create_dir does this

     mkdir $1 2>/dev/null

   to create directory $1.  By default mkdir doesn't create
   directories other than the last one; the preceding directories
   must exist:

     $ mkdir /tmp/a/b/c
     mkdir: cannot create directory `/tmp/a/b/c': No such file or directory

   This can be fixed by using the -p option to mkdir:

     $ rm -rf /tmp/a ; mkdir -p /tmp/a/b/c ; ls /tmp/a/b/c

     $

   Or by using install -d:

     $ rm -rf /tmp/a ; install -d /tmp/a/b/c ; ls /tmp/a/b/c

     $

   I don't know which of these is more portable.

 - first/mk_config does this

     for i in lang/cem/cemcom.ansi lang/cem/cemcom lang/m2/comp
     do
	     cp $SRC_HOME/$i/BigPars $CONFIG/$i/Parameters
	     chmod +w $CONFIG/$i/Parameters
     done

   but it doesn't create $CONFIG/$i/Parameters, which causes erorrs:

     cp: cannot create regular file
     `/tmp/ack/lang/cem/cemcom.ansi/Parameters': No such file or
     directory 

   This can be fixed by

     for i in lang/cem/cemcom.ansi lang/cem/cemcom lang/m2/comp
     do
             create_dir $CONFIG/$i/Parameters
	     cp $SRC_HOME/$i/BigPars $CONFIG/$i/Parameters
	     chmod +w $CONFIG/$i/Parameters
     done

   (I'm assuming Parameters is BigPars's parent directory).  This fix
   has to be applied to both for loops, the second of which isn't
   shown here.

 - INSTALL does this

     (
        # Slight complication here to ensure that the #! magic at the
        # beginning of TakeAction is preserved correctly.

        head -1 $SRC_HOME/TakeAction
        echo "PATH=:$CONFIG/bin:$UTIL_HOME/bin:$PATH; export PATH"
        tail +2 $SRC_HOME/TakeAction
     ) > $CONFIG/bin/TakeAction

   For whatever reason, using tail +n tail is frowned upon:

     $ tail +3 /dev/null
     Warning: "+number" syntax is deprecated, please use "-n +number"

     $

   The code works, but it's noisy.  It can be quieted by following
   the warning, or by 

     sed '2,$d' < $SRC_HOME/TakeAction
     echo "PATH=:$CONFIG/bin:$UTIL_HOME/bin:$PATH; export PATH"
     sed '1d' < $SRC_HOME/TakeAction

   or by (which replaces all the code given above)

     awk 'NR == 2 {
            write "PATH=:$CONFIG/bin:$UTIL_HOME/bin:$PATH; export PATH"
	    }
	  1
	 ' <$SRC_HOME/TakeAction >$CONFIG/bin/TakeAction

   although perhaps the best way is to add

     PATH=@PATH@ ; export PATH

   to $SRC_HOME/TakeAction and use

     sed 's;@PATH@;$CONFIG/bin:$UTIL_HOME/bin:$PATH;' \
       <$SRC_HOME/TakeAction >$CONFIG/bin/TakeAction

   in INSTALL.

Even with these fixes the install still fails because mk_config tries
to cd to $CONFIG/mach which doesn't exist; I haven't figured out that
one yet.