From a467e365dc114868f948b8b5b18e551b42d64ddd Mon Sep 17 00:00:00 2001
From: Pino Toscano <ptoscano@redhat.com>
Date: Fri, 15 Sep 2017 16:42:03 +0200
Subject: [PATCH] Add Augeas.set

Simple binding for aug_set, so it is possible to actually change the
value of nodes.
---
 augeas-c.c | 20 ++++++++++++++++++++
 augeas.ml  |  2 ++
 augeas.mli |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/augeas-c.c b/augeas-c.c
index 4db3f6c..3952910 100644
--- a/augeas-c.c
+++ b/augeas-c.c
@@ -349,3 +349,23 @@ ocaml_augeas_load (value tv)
 
   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;
+
+  val =
+    valuev == Val_int (0)
+    ? NULL
+    : String_val (Field (valuev, 0));
+
+  if (aug_set (t, path, val) == -1)
+    raise_error (t, "Augeas.set");
+
+  CAMLreturn (Val_unit);
+}
diff --git a/augeas.ml b/augeas.ml
index ba3626e..974a940 100644
--- a/augeas.ml
+++ b/augeas.ml
@@ -70,6 +70,8 @@ external save : t -> unit
   = "ocaml_augeas_save"
 external load : t -> unit
   = "ocaml_augeas_load"
+external set : t -> path -> value option -> unit
+  = "ocaml_augeas_set"
 
 let () =
   Callback.register_exception "Augeas.Error" (Error (AugErrInternal, "", "", ""))
diff --git a/augeas.mli b/augeas.mli
index a896270..ef43e43 100644
--- a/augeas.mli
+++ b/augeas.mli
@@ -115,3 +115,6 @@ val save : t -> unit
 
 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]. *)
-- 
1.8.3.1