Libguestfs - Feb 2015 - [PATCH 1/2] mllib: add helper mkdir_p

Small function to create in OCaml-based code a directory and its
parents, much like `mkdir -p`.
---
 mllib/common_utils.ml  | 11 +++++++++++
 mllib/common_utils.mli |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/mllib/common_utils.ml b/mllib/common_utils.ml
index 898be17..76d8b79 100644
--- a/mllib/common_utils.ml
+++ b/mllib/common_utils.ml
@@ -673,3 +673,14 @@ let qemu_input_filename filename      "./" ^
filename
   else
     filename
+
+let rec mkdir_p path permissions +  try Unix.mkdir path permissions
+  with
+  | Unix.Unix_error (Unix.EEXIST, _, _) -> ()
+  | Unix.Unix_error (Unix.ENOENT, _, _) ->
+    (* A component in the path does not exist, so first try
+     * creating the parent directory, and then again the requested
+     * directory. *)
+    mkdir_p (Filename.dirname path) permissions;
+    Unix.mkdir path permissions
diff --git a/mllib/common_utils.mli b/mllib/common_utils.mli
index 5d3149a..28ba648 100644
--- a/mllib/common_utils.mli
+++ b/mllib/common_utils.mli
@@ -147,3 +147,6 @@ val qemu_input_filename : string -> string
     try to interpret that as "foo" in the file:/// protocol.  To
     avoid that, if the path is relative prefix it with "./" since
     qemu-img won't try to interpret such a path. *)
+
+val mkdir_p : string -> int -> unit
+(** Creates a directory, and its parents if missing. *)
-- 
2.1.0

---
 builder/cache.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builder/cache.ml b/builder/cache.ml
index 9e69bc1..86ac41b 100644
--- a/builder/cache.ml
+++ b/builder/cache.ml
@@ -35,7 +35,7 @@ type t = {
 
 let create ~verbose ~directory    if not (is_directory directory) then
-    mkdir directory 0o755;
+    mkdir_p directory 0o755;
   {
     verbose = verbose;
     directory = directory;
-- 
2.1.0

ACK series.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top

On Mon, Feb 23, 2015 at 02:09:18PM +0100, Pino Toscano
wrote:
> ---
>  builder/cache.ml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
ACK.

Just tested locally with this.
> diff --git a/builder/cache.ml b/builder/cache.ml
> index 9e69bc1..86ac41b 100644
> --- a/builder/cache.ml
> +++ b/builder/cache.ml
> @@ -35,7 +35,7 @@ type t = {
>  
>  let create ~verbose ~directory >    if not (is_directory directory)
then
> -    mkdir directory 0o755;
> +    mkdir_p directory 0o755;
>    {
>      verbose = verbose;
>      directory = directory;
> -- 
> 2.1.0
 

-- 
/kashyap