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[Libguestfs] [PATCH 1/2] Bundle the ocaml-augeas library for use by libguestfs



Add a copy of the libvirt-ocaml library, currently available at:
  http://git.annexia.org/?p=ocaml-augeas.git;a=summary
This is a snapshot at commit 1cf5aef99b26a46529ca797547c0b49627fffe78,
which has all the features we need (and that builds fine).
It is expected to stay synchronized with upstream, until there is a new
upstream release, and it will be widespread enough.
---
 3rdparty/ocaml-augeas/COPYING.LIB   | 515 +++++++++++++++++++++++++
 3rdparty/ocaml-augeas/Makefile.am   |  82 ++++
 3rdparty/ocaml-augeas/augeas-c.c    | 579 ++++++++++++++++++++++++++++
 3rdparty/ocaml-augeas/augeas.README |   8 +
 3rdparty/ocaml-augeas/augeas.ml     |  99 +++++
 3rdparty/ocaml-augeas/augeas.mli    | 164 ++++++++
 6 files changed, 1447 insertions(+)
 create mode 100644 3rdparty/ocaml-augeas/COPYING.LIB
 create mode 100644 3rdparty/ocaml-augeas/Makefile.am
 create mode 100644 3rdparty/ocaml-augeas/augeas-c.c
 create mode 100644 3rdparty/ocaml-augeas/augeas.README
 create mode 100644 3rdparty/ocaml-augeas/augeas.ml
 create mode 100644 3rdparty/ocaml-augeas/augeas.mli

diff --git a/3rdparty/ocaml-augeas/COPYING.LIB b/3rdparty/ocaml-augeas/COPYING.LIB
new file mode 100644
index 000000000..ba2be481c
--- /dev/null
+++ b/3rdparty/ocaml-augeas/COPYING.LIB
@@ -0,0 +1,515 @@
+
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diff --git a/3rdparty/ocaml-augeas/Makefile.am b/3rdparty/ocaml-augeas/Makefile.am
new file mode 100644
index 000000000..af9759c5c
--- /dev/null
+++ b/3rdparty/ocaml-augeas/Makefile.am
@@ -0,0 +1,82 @@
+# libguestfs OCaml tools common code
+# Copyright (C) 2011-2019 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+include $(top_srcdir)/subdir-rules.mk
+
+EXTRA_DIST = \
+	$(SOURCES_MLI) \
+	$(SOURCES_ML) \
+	$(SOURCES_C) \
+	augeas.README
+
+SOURCES_MLI = \
+	augeas.mli
+
+SOURCES_ML = \
+	augeas.ml
+
+SOURCES_C = \
+	augeas-c.c
+
+# We pretend that we're building a C library.  automake handles the
+# compilation of the C sources for us.  At the end we take the C
+# objects and OCaml objects and link them into the OCaml library.
+# This C library is never used.
+
+noinst_LIBRARIES = libmlaugeas.a
+
+if !HAVE_OCAMLOPT
+MLAUGEAS_CMA = mlaugeas.cma
+else
+MLAUGEAS_CMA = mlaugeas.cmxa
+endif
+
+noinst_DATA = $(MLAUGEAS_CMA)
+
+libmlaugeas_a_SOURCES = $(SOURCES_C)
+libmlaugeas_a_CPPFLAGS = \
+	-DCAML_NAME_SPACE \
+	-I. \
+	-I$(top_builddir) \
+	-I$(shell $(OCAMLC) -where)
+libmlaugeas_a_CFLAGS = \
+	$(WARN_CFLAGS) $(NO_SNV_CFLAGS) $(NO_UM_CFLAGS) $(WERROR_CFLAGS) \
+	$(AUGEAS_CFLAGS) $(LIBXML2_CFLAGS) \
+	-fPIC
+
+BOBJECTS = $(SOURCES_ML:.ml=.cmo)
+XOBJECTS = $(BOBJECTS:.cmo=.cmx)
+
+OCAMLPACKAGES =
+OCAMLFLAGS = $(OCAML_FLAGS) $(OCAML_WARN_ERROR) -ccopt '$(CFLAGS)'
+
+if !HAVE_OCAMLOPT
+OBJECTS = $(BOBJECTS)
+else
+OBJECTS = $(XOBJECTS)
+endif
+
+libmlaugeas_a_DEPENDENCIES = $(OBJECTS)
+
+$(MLAUGEAS_CMA): $(OBJECTS) libmlaugeas.a
+	$(OCAMLFIND) mklib $(OCAMLPACKAGES) \
+	    $(OBJECTS) $(libmlaugeas_a_OBJECTS) -cclib -laugeas -o mlaugeas
+
+# Dependencies.
+.depend: $(srcdir)/*.mli $(srcdir)/*.ml
+	$(top_builddir)/ocaml-dep.sh $^
+-include .depend
diff --git a/3rdparty/ocaml-augeas/augeas-c.c b/3rdparty/ocaml-augeas/augeas-c.c
new file mode 100644
index 000000000..679bcb50b
--- /dev/null
+++ b/3rdparty/ocaml-augeas/augeas-c.c
@@ -0,0 +1,579 @@
+/* Augeas OCaml bindings
+ * Copyright (C) 2008-2017 Red Hat Inc., Richard W.M. Jones
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * $Id: augeas_c.c,v 1.1 2008/05/06 10:48:20 rjones Exp $
+ */
+
+#include "config.h"
+
+#include <augeas.h>
+
+#include <caml/alloc.h>
+#include <caml/memory.h>
+#include <caml/mlvalues.h>
+#include <caml/fail.h>
+#include <caml/callback.h>
+#include <caml/custom.h>
+
+#include <stdbool.h>
+
+#ifdef __GNUC__
+  #define NORETURN __attribute__ ((noreturn))
+#else
+  #define NORETURN
+#endif
+
+extern CAMLprim value ocaml_augeas_create (value rootv, value loadpathv, value flagsv);
+extern CAMLprim value ocaml_augeas_close (value tv);
+extern CAMLprim value ocaml_augeas_defnode (value tv, value namev, value exprv, value valv);
+extern CAMLprim value ocaml_augeas_defvar (value tv, value namev, value exprv);
+extern CAMLprim value ocaml_augeas_get (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_exists (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_insert (value tv, value beforev, value pathv, value labelv);
+extern CAMLprim value ocaml_augeas_label (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_mv (value tv, value srcv, value destv);
+extern CAMLprim value ocaml_augeas_rm (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_match (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_count_matches (value tv, value pathv);
+extern CAMLprim value ocaml_augeas_save (value tv);
+extern CAMLprim value ocaml_augeas_load (value tv);
+extern CAMLprim value ocaml_augeas_set (value tv, value pathv, value valuev);
+extern CAMLprim value ocaml_augeas_setm (value tv, value basev, value subv, value valv);
+extern CAMLprim value ocaml_augeas_transform (value tv, value lensv, value filev, value modev);
+extern CAMLprim value ocaml_augeas_source (value tv, value pathv)
+#ifndef HAVE_AUG_SOURCE
+  NORETURN
+#endif
+;
+
+typedef augeas *augeas_t;
+
+/* Map C aug_errcode_t to OCaml error_code. */
+static const int error_map[] = {
+  /* AugErrInternal */ AUG_EINTERNAL,
+  /* AugErrPathX */    AUG_EPATHX,
+  /* AugErrNoMatch */  AUG_ENOMATCH,
+  /* AugErrMMatch */   AUG_EMMATCH,
+  /* AugErrSyntax */   AUG_ESYNTAX,
+  /* AugErrNoLens */   AUG_ENOLENS,
+  /* AugErrMXfm */     AUG_EMXFM,
+  /* AugErrNoSpan */   AUG_ENOSPAN,
+  /* AugErrMvDesc */   AUG_EMVDESC,
+  /* AugErrCmdRun */   AUG_ECMDRUN,
+  /* AugErrBadArg */   AUG_EBADARG,
+  /* AugErrLabel */    AUG_ELABEL,
+  /* AugErrCpDesc */   AUG_ECPDESC,
+};
+static const int error_map_len = sizeof error_map / sizeof error_map[0];
+
+/* Raise an Augeas.Error exception, and optionally close the
+ * specified handle.
+ */
+static void
+raise_error_and_maybe_close (augeas_t t, const char *msg, bool close_handle)
+{
+  const value *exn = caml_named_value ("Augeas.Error");
+  value args[5];
+  const int code = aug_error (t);
+  const char *aug_err_msg;
+  const char *aug_err_minor;
+  const char *aug_err_details;
+  int ocaml_code = -1;
+  int i;
+
+  if (code == AUG_ENOMEM) {
+    if (close_handle)
+      aug_close (t);
+    caml_raise_out_of_memory ();
+  }
+
+  aug_err_msg = aug_error_message (t);
+  aug_err_minor = aug_error_minor_message (t);
+  aug_err_details = aug_error_details (t);
+
+  for (i = 0; i < error_map_len; ++i)
+    if (error_map[i] == code) {
+      ocaml_code = i;
+      break;
+    }
+
+  if (ocaml_code != -1)
+    args[0] = Val_int (ocaml_code);
+  else {
+    args[0] = caml_alloc (1, 0);
+    Store_field (args[0], 0, Val_int (code));
+  }
+  args[1] = caml_copy_string (msg);
+  args[2] = caml_copy_string (aug_err_msg);
+  args[3] = caml_copy_string (aug_err_minor ? : "");
+  args[4] = caml_copy_string (aug_err_details ? : "");
+
+  if (close_handle)
+    aug_close (t);
+
+  caml_raise_with_args (*exn, 5, args);
+}
+#define raise_error(t, msg) raise_error_and_maybe_close(t, msg, false)
+
+static void
+raise_init_error (const char *msg)
+{
+  const value *exn = caml_named_value ("Augeas.Error");
+  value args[5];
+
+  args[0] = caml_alloc (1, 0);
+  Store_field (args[0], 0, Val_int (-1));
+  args[1] = caml_copy_string (msg);
+  args[2] = caml_copy_string ("aug_init failed");
+  args[3] = caml_copy_string ("augeas initialization failed");
+  args[4] = caml_copy_string ("");
+
+  caml_raise_with_args (*exn, 5, args);
+}
+
+static const char *
+Optstring_val (value strv)
+{
+  if (strv == Val_int (0))      /* None */
+    return NULL;
+  else                          /* Some string */
+    return String_val (Field (strv, 0));
+}
+
+/* Map OCaml flags to C flags. */
+static const int flag_map[] = {
+  /* AugSaveBackup */  AUG_SAVE_BACKUP,
+  /* AugSaveNewFile */ AUG_SAVE_NEWFILE,
+  /* AugTypeCheck */   AUG_TYPE_CHECK,
+  /* AugNoStdinc */    AUG_NO_STDINC,
+  /* AugSaveNoop */    AUG_SAVE_NOOP,
+  /* AugNoLoad */      AUG_NO_LOAD,
+  /* AugNoModlAutoload */ AUG_NO_MODL_AUTOLOAD,
+  /* AugEnableSpan */  AUG_ENABLE_SPAN,
+  /* AugNoErrClose */  AUG_NO_ERR_CLOSE,
+  /* AugTraceModuleLoading */ AUG_TRACE_MODULE_LOADING,
+};
+
+/* Wrap and unwrap augeas_t handles, with a finalizer. */
+#define Augeas_t_val(rv) (*(augeas_t *)Data_custom_val(rv))
+
+static void
+augeas_t_finalize (value tv)
+{
+  augeas_t t = Augeas_t_val (tv);
+  if (t) aug_close (t);
+}
+
+static struct custom_operations custom_operations = {
+  (char *) "augeas_t_custom_operations",
+  augeas_t_finalize,
+  custom_compare_default,
+  custom_hash_default,
+  custom_serialize_default,
+  custom_deserialize_default,
+  custom_compare_ext_default,
+};
+
+static value Val_augeas_t (augeas_t t)
+{
+  CAMLparam0 ();
+  CAMLlocal1 (rv);
+  /* We could choose these so that the GC can make better decisions.
+   * See 18.9.2 of the OCaml manual.
+   */
+  const int used = 0;
+  const int max = 1;
+
+  rv = caml_alloc_custom (&custom_operations,
+			  sizeof (augeas_t), used, max);
+  Augeas_t_val(rv) = t;
+
+  CAMLreturn (rv);
+}
+
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+
+/* val create : string -> string option -> flag list -> t */
+CAMLprim value
+ocaml_augeas_create (value rootv, value loadpathv, value flagsv)
+{
+  CAMLparam1 (rootv);
+  const char *root = String_val (rootv);
+  const char *loadpath = Optstring_val (loadpathv);
+  int flags = 0, i;
+  augeas_t t;
+
+  /* Convert list of flags to C. */
+  for (; flagsv != Val_int (0); flagsv = Field (flagsv, 1)) {
+    i = Int_val (Field (flagsv, 0));
+    flags |= flag_map[i];
+  }
+
+  /* Pass AUG_NO_ERR_CLOSE so we raise a detailed Augeas.Error. */
+  t = aug_init (root, loadpath, flags | AUG_NO_ERR_CLOSE);
+
+  if (t == NULL)
+    raise_init_error ("Augeas.create");
+
+  if (aug_error (t) != AUG_NOERROR) {
+    raise_error_and_maybe_close (t, "Augeas.init", true);
+  }
+
+  CAMLreturn (Val_augeas_t (t));
+}
+
+/* val close : t -> unit */
+CAMLprim value
+ocaml_augeas_close (value tv)
+{
+  CAMLparam1 (tv);
+  augeas_t t = Augeas_t_val (tv);
+
+  if (t) {
+    aug_close (t);
+    Augeas_t_val(tv) = NULL;	/* So the finalizer doesn't double-free. */
+  }
+
+  CAMLreturn (Val_unit);
+}
+
+/* val defnode : t -> string -> string -> string option -> int * bool */
+CAMLprim value
+ocaml_augeas_defnode (value tv, value namev, value exprv, value valv)
+{
+  CAMLparam4 (tv, namev, exprv, valv);
+  CAMLlocal2 (optv, v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *name = String_val (namev);
+  const char *expr = String_val (exprv);
+  const char *val = Optstring_val (valv);
+  int r, created;
+
+  r = aug_defnode (t, name, expr, val, &created);
+  if (r == -1) {
+    raise_error (t, "Augeas.defnode");
+  }
+
+  v = caml_alloc (2, 0);
+  Store_field (v, 0, Val_int (r));
+  Store_field (v, 1, Val_bool (created));
+
+  CAMLreturn (v);
+}
+
+/* val defvar : t -> string -> string option -> int option */
+CAMLprim value
+ocaml_augeas_defvar (value tv, value namev, value exprv)
+{
+  CAMLparam3 (tv, namev, exprv);
+  CAMLlocal2 (optv, v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *name = String_val (namev);
+  const char *expr = Optstring_val (exprv);
+  int r;
+
+  r = aug_defvar (t, name, expr);
+  if (r > 0) {		/* Return Some val */
+    v = Val_int (r);
+    optv = caml_alloc (1, 0);
+    Field (optv, 0) = v;
+  } else if (r == 0)	/* Return None */
+    optv = Val_int (0);
+  else if (r == -1)		/* Error or multiple matches */
+    raise_error (t, "Augeas.defvar");
+  else
+    caml_failwith ("Augeas.defvar: bad return value");
+
+  CAMLreturn (optv);
+}
+
+/* val get : t -> path -> value option */
+CAMLprim value
+ocaml_augeas_get (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  CAMLlocal2 (optv, v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  const char *val;
+  int r;
+
+  r = aug_get (t, path, &val);
+  if (r == 1 && val) {		/* Return Some val */
+    v = caml_copy_string (val);
+    optv = caml_alloc (1, 0);
+    Field (optv, 0) = v;
+  } else if (r == 0 || !val)	/* Return None */
+    optv = Val_int (0);
+  else if (r == -1)		/* Error or multiple matches */
+    raise_error (t, "Augeas.get");
+  else
+    caml_failwith ("Augeas.get: bad return value");
+
+  CAMLreturn (optv);
+}
+
+/* val exists : t -> path -> bool */
+CAMLprim value
+ocaml_augeas_exists (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  CAMLlocal1 (v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  int r;
+
+  r = aug_get (t, path, NULL);
+  if (r == 1)			/* Return true. */
+    v = Val_int (1);
+  else if (r == 0)		/* Return false */
+    v = Val_int (0);
+  else if (r == -1)		/* Error or multiple matches */
+    raise_error (t, "Augeas.exists");
+  else
+    caml_failwith ("Augeas.exists: bad return value");
+
+  CAMLreturn (v);
+}
+
+/* val insert : t -> ?before:bool -> path -> string -> unit */
+CAMLprim value
+ocaml_augeas_insert (value tv, value beforev, value pathv, value labelv)
+{
+  CAMLparam4 (tv, beforev, pathv, labelv);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  const char *label = String_val (labelv);
+  int before;
+
+  before = beforev == Val_int (0) ? 0 : Int_val (Field (beforev, 0));
+
+  if (aug_insert (t, path, label, before) == -1)
+    raise_error (t, "Augeas.insert");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val label : t -> path -> string option */
+CAMLprim value
+ocaml_augeas_label (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  CAMLlocal2 (optv, v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  const char *val;
+  int r;
+
+  r = aug_label (t, path, &val);
+  if (r == 1 && val) {		/* Return Some val */
+    v = caml_copy_string (val);
+    optv = caml_alloc (1, 0);
+    Field (optv, 0) = v;
+  } else if (r == 0 || !val)	/* Return None */
+    optv = Val_int (0);
+  else if (r == -1)		/* Error or multiple matches */
+    raise_error (t, "Augeas.label");
+  else
+    caml_failwith ("Augeas.label: bad return value");
+
+  CAMLreturn (optv);
+}
+
+/* val mv : t -> path -> path -> unit */
+CAMLprim value
+ocaml_augeas_mv (value tv, value srcv, value destv)
+{
+  CAMLparam3 (tv, srcv, destv);
+  augeas_t t = Augeas_t_val (tv);
+  const char *src = String_val (srcv);
+  const char *dest = String_val (destv);
+
+  if (aug_mv (t, src, dest) == -1)
+    raise_error (t, "Augeas.mv");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val rm : t -> path -> int */
+CAMLprim value
+ocaml_augeas_rm (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  int r;
+
+  r = aug_rm (t, path);
+  if (r == -1)
+    raise_error (t, "Augeas.rm");
+
+  CAMLreturn (Val_int (r));
+}
+
+/* val matches : t -> path -> path list */
+CAMLprim value
+ocaml_augeas_match (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  CAMLlocal3 (rv, v, cons);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  char **matches;
+  int r, i;
+
+  r = aug_match (t, path, &matches);
+  if (r == -1)
+    raise_error (t, "Augeas.matches");
+
+  /* Copy the paths to a list. */
+  rv = Val_int (0);
+  for (i = 0; i < r; ++i) {
+    v = caml_copy_string (matches[i]);
+    free (matches[i]);
+    cons = caml_alloc (2, 0);
+    Field (cons, 1) = rv;
+    Field (cons, 0) = v;
+    rv = cons;
+  }
+
+  free (matches);
+
+  CAMLreturn (rv);
+}
+
+/* val count_matches : t -> path -> int */
+CAMLprim value
+ocaml_augeas_count_matches (value tv, value pathv)
+{
+  CAMLparam2 (tv, pathv);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  int r;
+
+  r = aug_match (t, path, NULL);
+  if (r == -1)
+    raise_error (t, "Augeas.count_matches");
+
+  CAMLreturn (Val_int (r));
+}
+
+/* val save : t -> unit */
+CAMLprim value
+ocaml_augeas_save (value tv)
+{
+  CAMLparam1 (tv);
+  augeas_t t = Augeas_t_val (tv);
+
+  if (aug_save (t) == -1)
+    raise_error (t, "Augeas.save");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val load : t -> unit */
+CAMLprim value
+ocaml_augeas_load (value tv)
+{
+  CAMLparam1 (tv);
+  augeas_t t = Augeas_t_val (tv);
+
+  if (aug_load (t) == -1)
+    raise_error (t, "Augeas.load");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val set : t -> -> path -> value option -> unit */
+CAMLprim value
+ocaml_augeas_set (value tv, value pathv, value valuev)
+{
+  CAMLparam3 (tv, pathv, valuev);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  const char *val = Optstring_val (valuev);
+
+  if (aug_set (t, path, val) == -1)
+    raise_error (t, "Augeas.set");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val setm : t -> path -> string option -> value option -> int */
+CAMLprim value
+ocaml_augeas_setm (value tv, value basev, value subv, value valv)
+{
+  CAMLparam4 (tv, basev, subv, valv);
+  augeas_t t = Augeas_t_val (tv);
+  const char *base = String_val (basev);
+  const char *sub = Optstring_val (subv);
+  const char *val = Optstring_val (valv);
+  int r;
+
+  r = aug_setm (t, base, sub, val);
+  if (r == -1)
+    raise_error (t, "Augeas.setm");
+
+  CAMLreturn (Val_int (r));
+}
+
+/* val transform : t -> string -> string -> transform_mode -> unit */
+CAMLprim value
+ocaml_augeas_transform (value tv, value lensv, value filev, value modev)
+{
+  CAMLparam4 (tv, lensv, filev, modev);
+  augeas_t t = Augeas_t_val (tv);
+  const char *lens = String_val (lensv);
+  const char *file = String_val (filev);
+  const int excl = Int_val (modev) == 1 ? 1 : 0;
+
+  if (aug_transform (t, lens, file, excl) == -1)
+    raise_error (t, "Augeas.transform");
+
+  CAMLreturn (Val_unit);
+}
+
+/* val source : t -> path -> path option */
+CAMLprim value
+ocaml_augeas_source (value tv, value pathv)
+{
+#ifdef HAVE_AUG_SOURCE
+  CAMLparam2 (tv, pathv);
+  CAMLlocal2 (optv, v);
+  augeas_t t = Augeas_t_val (tv);
+  const char *path = String_val (pathv);
+  char *file_path;
+  int r;
+
+  r = aug_source (t, path, &file_path);
+  if (r == 0) {
+    if (file_path) {	/* Return Some file_path */
+      v = caml_copy_string (file_path);
+      optv = caml_alloc (1, 0);
+      Field (optv, 0) = v;
+      free (file_path);
+    } else		/* Return None */
+      optv = Val_int (0);
+  }
+  else			/* Error */
+    raise_error (t, "Augeas.source");
+
+  CAMLreturn (optv);
+#else
+  caml_failwith ("Augeas.source: function not implemented");
+#endif
+}
diff --git a/3rdparty/ocaml-augeas/augeas.README b/3rdparty/ocaml-augeas/augeas.README
new file mode 100644
index 000000000..938dfd255
--- /dev/null
+++ b/3rdparty/ocaml-augeas/augeas.README
@@ -0,0 +1,8 @@
+The files augeas-c.c, augeas.ml and augeas.mli come from the
+ocaml-augeas library:
+
+  http://git.annexia.org/?p=ocaml-augeas.git
+
+which is released under a compatible license.  We try to keep them
+identical, so if you make changes to these files then you must also
+submit the changes to ocaml-augeas, and vice versa.
\ No newline at end of file
diff --git a/3rdparty/ocaml-augeas/augeas.ml b/3rdparty/ocaml-augeas/augeas.ml
new file mode 100644
index 000000000..aa5a18226
--- /dev/null
+++ b/3rdparty/ocaml-augeas/augeas.ml
@@ -0,0 +1,99 @@
+(* Augeas OCaml bindings
+ * Copyright (C) 2008 Red Hat Inc., Richard W.M. Jones
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * $Id: augeas.ml,v 1.2 2008/05/06 10:48:20 rjones Exp $
+ *)
+
+type t
+
+type flag =
+  | AugSaveBackup
+  | AugSaveNewFile
+  | AugTypeCheck
+  | AugNoStdinc
+  | AugSaveNoop
+  | AugNoLoad
+  | AugNoModlAutoload
+  | AugEnableSpan
+  | AugNoErrClose
+  | AugTraceModuleLoading
+
+type error_code =
+  | AugErrInternal
+  | AugErrPathX
+  | AugErrNoMatch
+  | AugErrMMatch
+  | AugErrSyntax
+  | AugErrNoLens
+  | AugErrMXfm
+  | AugErrNoSpan
+  | AugErrMvDesc
+  | AugErrCmdRun
+  | AugErrBadArg
+  | AugErrLabel
+  | AugErrCpDesc
+  | AugErrUnknown of int
+
+type transform_mode =
+  | Include
+  | Exclude
+
+exception Error of error_code * string * string * string * string
+
+type path = string
+
+type value = string
+
+external create : string -> string option -> flag list -> t
+  = "ocaml_augeas_create"
+external close : t -> unit
+  = "ocaml_augeas_close"
+external defnode : t -> string -> string -> string option -> int * bool
+  = "ocaml_augeas_defnode"
+external defvar : t -> string -> string option -> int option
+  = "ocaml_augeas_defvar"
+external get : t -> path -> value option
+  = "ocaml_augeas_get"
+external exists : t -> path -> bool
+  = "ocaml_augeas_exists"
+external insert : t -> ?before:bool -> path -> string -> unit
+  = "ocaml_augeas_insert"
+external label : t -> path -> string option
+  = "ocaml_augeas_label"
+external rm : t -> path -> int
+  = "ocaml_augeas_rm"
+external matches : t -> path -> path list
+  = "ocaml_augeas_match"
+external count_matches : t -> path -> int
+  = "ocaml_augeas_count_matches"
+external save : t -> unit
+  = "ocaml_augeas_save"
+external load : t -> unit
+  = "ocaml_augeas_load"
+external mv : t -> path -> path -> unit
+  = "ocaml_augeas_mv"
+external set : t -> path -> value option -> unit
+  = "ocaml_augeas_set"
+external setm : t -> path -> string option -> value option -> int
+  = "ocaml_augeas_setm"
+external transform : t -> string -> string -> transform_mode -> unit
+  = "ocaml_augeas_transform"
+external source : t -> path -> path option
+  = "ocaml_augeas_source"
+
+let () =
+  Callback.register_exception "Augeas.Error" (Error (AugErrInternal, "", "", "", ""))
diff --git a/3rdparty/ocaml-augeas/augeas.mli b/3rdparty/ocaml-augeas/augeas.mli
new file mode 100644
index 000000000..8cbeae188
--- /dev/null
+++ b/3rdparty/ocaml-augeas/augeas.mli
@@ -0,0 +1,164 @@
+(** Augeas OCaml bindings *)
+(* Copyright (C) 2008 Red Hat Inc., Richard W.M. Jones
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * $Id: augeas.mli,v 1.2 2008/05/06 10:48:20 rjones Exp $
+ *)
+
+type t
+  (** Augeas library handle. *)
+
+type flag =
+  | AugSaveBackup			(** Rename original with .augsave *)
+  | AugSaveNewFile			(** Save changes to .augnew *)
+  | AugTypeCheck			(** Type-check lenses *)
+  | AugNoStdinc
+  | AugSaveNoop
+  | AugNoLoad
+  | AugNoModlAutoload
+  | AugEnableSpan
+  | AugNoErrClose
+  | AugTraceModuleLoading
+  (** Flags passed to the {!create} function. *)
+
+type error_code =
+  | AugErrInternal		(** Internal error (bug) *)
+  | AugErrPathX			(** Invalid path expression *)
+  | AugErrNoMatch		(** No match for path expression *)
+  | AugErrMMatch		(** Too many matches for path expression *)
+  | AugErrSyntax		(** Syntax error in lens file *)
+  | AugErrNoLens		(** Lens lookup failed *)
+  | AugErrMXfm			(** Multiple transforms *)
+  | AugErrNoSpan		(** No span for this node *)
+  | AugErrMvDesc		(** Cannot move node into its descendant *)
+  | AugErrCmdRun		(** Failed to execute command *)
+  | AugErrBadArg		(** Invalid argument in funcion call *)
+  | AugErrLabel			(** Invalid label *)
+  | AugErrCpDesc		(** Cannot copy node into its descendant *)
+  | AugErrUnknown of int
+  (** Possible error codes. *)
+
+type transform_mode =
+  | Include
+  | Exclude
+  (** The operation mode for the {!transform} function. *)
+
+exception Error of error_code * string * string * string * string
+  (** This exception is thrown when the underlying Augeas library
+      returns an error.  The tuple represents:
+      - the Augeas error code
+      - the ocaml-augeas error string
+      - the Augeas error message
+      - the human-readable explanation of the Augeas error, if available
+      - a string with details of the Augeas error
+   *)
+
+type path = string
+  (** A path expression.
+
+      Note in future we may replace this with a type-safe path constructor. *)
+
+type value = string
+  (** A value. *)
+
+val create : string -> string option -> flag list -> t
+  (** [create root loadpath flags] creates an Augeas handle.
+
+      [root] is a file system path describing the location
+      of the configuration files.
+
+      [loadpath] is an optional colon-separated list of directories
+      which are searched for schema definitions.
+
+      [flags] is a list of flags. *)
+
+val close : t -> unit
+  (** [close handle] closes the handle.
+
+      You don't need to close handles explicitly with this function:
+      they will be finalized eventually by the garbage collector.
+      However calling this function frees up any resources used by the
+      underlying Augeas library immediately.
+
+      Do not use the handle after closing it. *)
+
+val defnode : t -> string -> string -> string option -> int * bool
+  (** [defnode t name expr value] defines [name] whose value is the
+      result of evaluating [expr], which is a nodeset. *)
+
+val defvar : t -> string -> string option -> int option
+  (** [defvar t name expr] defines [name] whose value is the result
+      of evaluating [expr], replacing the old value if existing.
+      [None] as [expr] removes the variable [name]. *)
+
+val get : t -> path -> value option
+  (** [get t path] returns the value at [path], or [None] if there
+      is no value. *)
+
+val exists : t -> path -> bool
+  (** [exists t path] returns true iff there is a value at [path]. *)
+
+val insert : t -> ?before:bool -> path -> string -> unit
+  (** [insert t ?before path label] inserts [label] as a sibling
+      of [path].  By default it is inserted after [path], unless
+      [~before:true] is specified. *)
+
+val label : t -> path -> string option
+  (** [label t path] gets the label of [path].
+
+      Returns [Some value] when [path] matches only one node, and
+      that has an associated label. *)
+
+val rm : t -> path -> int
+  (** [rm t path] removes all nodes matching [path].
+
+      Returns the number of nodes removed (which may be 0). *)
+
+val matches : t -> path -> path list
+  (** [matches t path] returns a list of path expressions
+      of all nodes matching [path]. *)
+
+val mv : t -> path -> path -> unit
+  (** [mv t src dest] moves a node. *)
+
+val count_matches : t -> path -> int
+  (** [count_matches t path] counts the number of nodes matching
+      [path] but does not return them (see {!matches}). *)
+
+val save : t -> unit
+  (** [save t] saves all pending changes to disk. *)
+
+val load : t -> unit
+  (** [load t] loads files into the tree. *)
+
+val set : t -> path -> value option -> unit
+  (** [set t path] sets [value] as new value at [path]. *)
+
+val setm : t -> path -> string option -> value option -> int
+  (** [setm t base sub value] sets [value] as new value for all the
+      nodes under [base] that match [sub] (or all, if [sub] is
+      [None]).
+
+      Returns the number of nodes modified. *)
+
+val transform : t -> string -> string -> transform_mode -> unit
+  (** [transform t lens file mode] adds or removes (depending on
+      [mode]) the transformation of the specified [lens] for [file]. *)
+
+val source : t -> path -> path option
+  (** [source t path] returns the path to the node representing the
+      file to which [path] belongs, or [None] if [path] does not
+      represent any file. *)
-- 
2.23.0


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