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Bundle the ocaml-augeas library for use by libguestfs

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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.
This commit is contained in:
Pino Toscano
2019-12-16 16:14:05 +01:00
parent 68f5c27ada
commit c93cc14b9f
6 changed files with 1447 additions and 0 deletions
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# 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

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/* 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
}

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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.

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(* 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, "", "", "", ""))

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(** 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. *)