resize: Remove requirement for ocaml Pcre library.

This library is not available in RHEL 6, and in any case removing the
dependency is a simple change.
(cherry picked from commit ffbafadcb8dfebcaba529cb8d7e2da52dd032d8a)

6 files changed, 11 insertions, 34 deletions

diff --git a/Makefile.am b/Makefile.am
index 388cdeb8..bcafa226 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -69,10 +69,7 @@ SUBDIRS += csharp
 
 # virt-resize (new version) and virt-sparsify are written in OCaml.
 if HAVE_OCAML
-if HAVE_OCAML_PCRE
-SUBDIRS += resize
-endif
-SUBDIRS += sparsify
+SUBDIRS += resize sparsify
 endif
 
 # Perl tools.
diff --git a/README b/README
index 9d18eebf..510798d0 100644
--- a/README
+++ b/README
@@ -101,10 +101,6 @@ To build FUSE support (guestmount):
 
 - FUSE libraries and kernel module (optional)
 
-To build virt-resize:
-
-- OCaml PCRE bindings (ocaml-pcre) (optional)
-
 To build language bindings:
 
 - Perl if you want to build the perl bindings (optional)
diff --git a/configure.ac b/configure.ac
index eca45e62..dc8264ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -652,14 +652,9 @@ AS_IF([test "x$enable_ocaml" != "xno"],
          OCAMLFIND=
          AC_PROG_OCAML
          AC_PROG_FINDLIB
-
-         AS_IF([test "x$OCAMLC" != "xno" && test "x$OCAMLFIND" != "xno"],
-         	[AC_CHECK_OCAML_PKG([pcre])])
         ])
 AM_CONDITIONAL([HAVE_OCAML],
                [test "x$OCAMLC" != "xno" && test "x$OCAMLFIND" != "xno"])
-AM_CONDITIONAL([HAVE_OCAML_PCRE],
-               [test "x$OCAMLC" != "xno" && test "x$OCAMLFIND" != "xno" && test "x$OCAML_PKG_pcre" != "xno"])
 AM_CONDITIONAL([HAVE_OCAMLDOC],
                [test "x$OCAMLDOC" != "xno"])
 
@@ -1088,7 +1083,7 @@ echo    "guestfish and C virt tools .......... yes"
 echo -n "Perl virt tools ..................... "
 if test "x$HAVE_TOOLS_TRUE" = "x"; then echo "yes"; else echo "no"; fi
 echo -n "virt-resize ......................... "
-if test "x$HAVE_OCAML_TRUE" = "x" && test "x$HAVE_OCAML_PCRE_TRUE" = "x"; then echo "yes"; else echo "no"; fi
+if test "x$HAVE_OCAML_TRUE" = "x"; then echo "yes"; else echo "no"; fi
 echo "FUSE filesystem ..................... $enable_fuse"
 echo
 echo "If any optional component is configured 'no' when you expected 'yes'"
diff --git a/debian/control b/debian/control
index 8027bda0..02c4657c 100644
--- a/debian/control
+++ b/debian/control
@@ -24,8 +24,6 @@ Build-Depends: debhelper (>= 7), dpkg-dev, devscripts, autotools-dev,
   libsys-virt-perl, libwin-hivex-perl,
 # FUSE
   libfuse-dev, fuse-utils,
-# virt-resize
-  libpcre-ocaml-dev,
 # Debian OCaml
   dh-ocaml,
 # to create images in the test suite
diff --git a/resize/Makefile.am b/resize/Makefile.am
index 32c5325c..69103d68 100644
--- a/resize/Makefile.am
+++ b/resize/Makefile.am
@@ -25,7 +25,6 @@ EXTRA_DIST = \
 CLEANFILES = *~ *.cmi *.cmo *.cmx *.cmxa *.o virt-resize test.img
 
 if HAVE_OCAML
-if HAVE_OCAML_PCRE
 
 # Alphabetical order.
 SOURCES = \
@@ -49,7 +48,7 @@ bin_SCRIPTS = virt-resize
 # -I $(top_builddir)/src/.libs is a hack which forces corresponding -L
 # option to be passed to gcc, so we don't try linking against an
 # installed copy of libguestfs.
-OCAMLPACKAGES = -package pcre -I $(top_builddir)/src/.libs -I ../ocaml
+OCAMLPACKAGES = -package str -I $(top_builddir)/src/.libs -I ../ocaml
 
 OCAMLCFLAGS = -g -warn-error CDEFLMPSUVYZX $(OCAMLPACKAGES)
 OCAMLOPTFLAGS = $(OCAMLCFLAGS)
@@ -124,7 +123,6 @@ include .depend
 .PHONY: depend docs
 
 endif
-endif
 
 # Parallel builds don't obey dependencies for some reason we
 # don't understand.
diff --git a/resize/utils.ml b/resize/utils.ml
index dc134be6..c11740fd 100644
--- a/resize/utils.ml
+++ b/resize/utils.ml
@@ -102,23 +102,16 @@ let feature_available (g : Guestfs.guestfs) names =
 
 (* Parse the size field from --resize and --resize-force options. *)
 let parse_size =
-  let const_re = Pcre.regexp "^([.\\d]+)([bKMG])$"
-  and plus_const_re = Pcre.regexp "^\\+([.\\d]+)([bKMG])$"
-  and minus_const_re = Pcre.regexp "^-([.\\d]+)([bKMG])$"
-  and percent_re = Pcre.regexp "^([.\\d]+)%$"
-  and plus_percent_re = Pcre.regexp "^\\+([.\\d]+)%$"
-  and minus_percent_re = Pcre.regexp "^-([.\\d]+)%$"
+  let const_re = Str.regexp "^\\([.0-9]+\\)\\([bKMG]\\)$"
+  and plus_const_re = Str.regexp "^\\+\\([.0-9]+\\)\\([bKMG]\\)$"
+  and minus_const_re = Str.regexp "^-\\([.0-9]+\\)\\([bKMG]\\)$"
+  and percent_re = Str.regexp "^\\([.0-9]+\\)%$"
+  and plus_percent_re = Str.regexp "^\\+\\([.0-9]+\\)%$"
+  and minus_percent_re = Str.regexp "^-\\([.0-9]+\\)%$"
   in
   fun oldsize field ->
-    let subs = ref None in
-    let matches rex =
-      try subs := Some (Pcre.exec ~rex field); true
-      with Not_found -> false
-    in
-    let sub i =
-      match !subs with None -> assert false
-      | Some subs -> Pcre.get_substring subs i
-    in
+    let matches rex = Str.string_match rex field 0 in
+    let sub i = Str.matched_group i field in
     let size_scaled f = function
       | "b" -> Int64.of_float f
       | "K" -> Int64.of_float (f *. 1024.)