pgindent excluded files list

I propose that we create a file containing the list of patterns to
exclude from pgindent runs. It would look like this:

#list of file patterns to exclude from pg_indent runs
/s_lock\.h$
/ecpg/test/expected/
/snowball/libstemmer/
/ecpg/include/(sqlda|sqltypes)\.h$
/ecpg/include/preproc/struct\.h$
/pl/plperl/ppport\.h$

Then a pgindent run would look like this:

find . -name '*.[ch]' -type f -print | \
egrep -v -f src/tools/pgindent/exclude_files | \
xargs -n100 pgindent src/tools/pgindent/typedefs.list

which is shorter and more efficient and less error prone than the way it's done in the current instructions (which puts the patterns to be excluded in a series of egrep pipes).

Thoughts?

cheers

andrew