includes

#!/bin/csh -f
# includes (csh script) -- Reports on the include files in all .c & .C files
# Usage: includes [ <file> ... ]
# Where file is the file(s) to look in.  (Default: "*.c *.C *.c++ *.cc".)
# For each specified or found file which contains at least one line of the
# form "#include "file.h"", a line of the form:
#   "<object-file>: <include-file> ..."
# is output, listing the file's name (with the extension replaced by .o) and
# all relevant include files it refers to.
#
# This script is useful for updating makefiles.

set files
if ($#argv == 0) then
  foreach pattern ("*.c" "*.C" "*.c++" "*.cc")
    if ("`sh -c 'echo $pattern'`" != "$pattern") then
      set files = ($files $pattern)
    endif
  end
else
  set files = "$*"
endif

foreach file ($files)
  # this prevents unmatched wildcard patterns from causing a shell error:
  set includes = `sed -n -e 's/^#include *"\(.*\)".*$/\1/p' $file`
  if ("$includes" != "") then
    echo "`echo $file | sed -e 's/\(.*\)\..*/\1.o/'`: $includes"
  endif
end